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1
Fay, Francis H., and Robert O. Stephenson. "Annual, seasonal, and habitat-related variation in feeding habits of the arctic fox (Alopex lagopus) on St. Lawrence Island, Bering Sea." Canadian Journal of Zoology 67, no. 8 (August 1, 1989): 1986–94. http://dx.doi.org/10.1139/z89-283.
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Small rodents, especially northern voles (Microtus oeconomus), were the most frequently occurring prey in the stomach contents and scats of arctic foxes collected on St. Lawrence Island between 1955 and 1970. Annual variations in the winter occurrence of voles in the stomach contents correlated well with variations in population density of the voles in the previous summer. However, when the foxes' summer dens were in or near large marine bird colonies, birds predominated in the diet. Even in winter, birds tended to occur more frequently in the diet of foxes trapped on bird cliffs than on the tundra. Since the birds are absent from the cliffs in winter, these evidently were from cached supplies. In terms of biomass, birds were of equal or greater importance than voles in the overall diet, and marine mammal carrion became most important in winter and early spring, when live prey were scarce. Although populations of live prey were abundant and readily accessible in summer, they were absent or inaccessible in winter; hence, even in this area of abundance, storage of food was essential for survival of foxes through the cold months.
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Hill, Joseph E., Daniel L. Burke, and George N. Rowland. "Hepatopathy and Lymphosarcoma in a Mynah Bird with Excessive Iron Storage." Avian Diseases 30, no. 3 (July 1986): 634. http://dx.doi.org/10.2307/1590438.
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Zanetti, Leonardo Henrique, Alice Eiko Murakami, Mayra Diaz-Vargas, Ana Flávia Quiles Garcia Guerra, Ivan Camilo Ospina-Rojas, Paula Toshimi Matumoto Pintro, and Valquíria Cação Cruz-Polycarpo. "By-product of passion fruit seed (Passiflora edulis) in the diet of commercial laying hens." Canadian Journal of Animal Science 96, no. 4 (December 1, 2016): 488–94. http://dx.doi.org/10.1139/cjas-2016-0027.
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This study evaluated the effects of the inclusion of the by-product passion fruit seed (BPFS) in the diet of laying hens on performance, blood variables, quality, and lipid oxidation in eggs. A total of 384 Hy-line W36 layers (32 wk old) were distributed in a completely randomized design, with six treatments (control, 2.5%, 5.0%, 7.5%, 10.0%, and 12.5% inclusion of BPFS), eight replicates and eight birds each. The productive performance was evaluated for three cycles of 28 d each. There was no difference (P > 0.05) in egg production and feed conversion. However, feed intake showed increased linearly (P < 0.05). The egg weight, egg mass, percentage of eggshell, eggshell thickness, and Haugh unit did not differ (P > 0.05); however, the specific gravity of eggs increased (P < 0.05). Total cholesterol and blood triglycerides decreased linearly (P < 0.05). To evaluate the lipid yolk oxidation, a 6 × 5 × 2 factorial design (six levels of BPFS × five storage periods × two temperatures) was used. There was an interaction (P < 0.05) among the levels of BPFS, time, and storage temperature with the lowest oxidation level of 12.5% when eggs were refrigerated. The BPFS can be included at a level up to 5.0% without compromising bird performance and 12.5% for egg quality, and this level reduced yolk lipid oxidation.
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Prokopy, Ronald J., Sylvia S. Cooley, Luis Galarza, Christopher Bergweiler, and Carol R. Lauzon. "BIRD DROPPINGS COMPETE WITH BAIT SPRAYS FOR RHAGOLETIS POMONELLA (WALSH) FLIES (DIPTERA: TEPHRITIDAE)." Canadian Entomologist 125, no. 3 (June 1993): 413–22. http://dx.doi.org/10.4039/ent125413-3.
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AbstractPublished studies have shown inconsistent effects of proteinaceous bait sprays against apple maggot flies, Rhagoletis pomonella (Walsh). Explanations of inconsistency could involve the presence of natural food such as bird droppings competing with bait sprays for attraction of flies. Under field, semi-field, or laboratory conditions, we found that: (1) aqueous solutions of 10% proteinaceous bait (Nulure) were significantly more attractive than water to protein-denied but not to protein-provided apple maggot flies; (2) addition of 2% toxicant (malathion 50 EC) did not affect attractiveness of Nulure droplets but did significantly deter feeding by arriving protein-provided flies (though not protein-denied flies); (3) droppings collected from barn swallows, chickens, and unidentified birds on apple trees were significantly more attractive than solutions or droplets of Nulure to protein-denied flies; (4) droppings that were freshly deposited or fresh from cold storage were significantly less attractive than droppings held under ambient conditions for 1 or 2 days; (5) droppings allowed to dry for 1 day at 25 °C, 60% RH were no less attractive than droppings that received water to simulate dew or rainfall; and (6) droppings treated with antibiotics were significantly less attractive than droppings not treated with antibiotics, indicating that bacteria may be involved in generating attractive volatiles. Together, these findings suggest that in situations where natural sources of protein such as bird droppings or insect honeydew are abundant, apple maggot flies may be relatively unaffected by addition of proteinaceous bait to insecticide sprays.
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Farine, Damien R., and Stephen D. J. Lang. "The early bird gets the worm: foraging strategies of wild songbirds lead to the early discovery of food sources." Biology Letters 9, no. 6 (December 23, 2013): 20130578. http://dx.doi.org/10.1098/rsbl.2013.0578.
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Animals need to manage the combined risks of predation and starvation in order to survive. Theoretical and empirical studies have shown that individuals can reduce predation risk by delaying feeding (and hence fat storage) until late afternoon. However, little is known about how individuals manage the opposing pressures of resource uncertainty and predation risks. We suggest that individuals should follow a two-part strategy: prioritizing the discovery of food early in the day and exploiting the best patch late in the day. Using automated data loggers, we tested whether a temporal component exists in the discovery of novel foraging locations by individuals in a mixed-species foraging guild. We found that food deployed in the morning was discovered significantly more often than food deployed in the afternoon. Based on the diurnal activity patterns in this population, overall rates of new arrivals were also significantly higher than expected in the morning and significantly lower than expected in the afternoon. These results align with our predictions of a shift from patch discovery to exploitation over the course of the day.
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Subbotina, Yu M. "MICROBIOLOGICAL AND BIOCENOTIC UTILIZATION OF BIRD DROPPINGS BY NATURAL BIOCENOSES." Problems of Veterinary Sanitation, Hygiene and Ecology 1, no. 3 (2020): 341–50. http://dx.doi.org/10.36871/vet.san.hyg.ecol.202003009.
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The problem of waste disposal of poultry production is considered. The properties of bird droppings are analyzed, depending on the condition and feeding of the bird. The morphological composition of poultry manure is given, and the value of 1 ton of bird droppings to mineral fertilizer is compared. Bird droppings has a feature – a narrow ratio of carbon and nitrogen, that’s why the litter is mineralized much faster by the soil microflora. It is also emphasized that wrong storage of bird droppings leads to loss of nitrogen, which can reach 50%. Various technologies for disposing of droppings by microorganisms are considered, using the California worm and housefly larvae. Bioenergetic methods of litter utilization are analyzed in detail. The article comprehensively examines the processes of anaerobic fermentation of manure and the production of biogas-methane, notes the dependence of biogas formation on temperature, and emphasizes that mesophyll and psychophile bacteria participate in the formation of biogas. Then the biogas is used to generate electricity and heat the premises. In addition to thermo and mesophilic fermentation, the disposal of bird droppings using vermiculture and red housefly is considered. The positive aspects of these technologies are described, namely, the production of biohumus, which binds and neutralizes heavy metals, in the process of utilization, phytohormones are produced by microflora, being used in crop production, they accelerate the growth of plants by 4-6 times, help to resist diseases and pests of agricultural crops. The article notes the high effect of using the larvae of the house fly (Musca domestica L), which was thoroughly tested by the Federal Science Center of Animal Husbandry under the guidance of academician L.K. Ernst. The high efficiency of using fly larvae is emphasized, where scientists note that in addition to the membrane and intracellular mechanism of digestion, induced autolysis is added (joint digestion of food by the "host" and "victim" enzymes in the host's gastrointestinal tract). Specialists get chitin and chitosin of high quality from fly larvae. Derivatives of these compounds are used in the food, perfume, pharmaceutical, and medical industries, moreover, chitosin is the polymer of the future. It increases the resistance of animals to infectious diseases by 10-15 %.
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Waite, Thomas A., and Dan Strickland. "Climate change and the demographic demise of a hoarding bird living on the edge." Proceedings of the Royal Society B: Biological Sciences 273, no. 1603 (August 15, 2006): 2809–13. http://dx.doi.org/10.1098/rspb.2006.3667.
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Population declines along the lower-latitude edge of a species' range may be diagnostic of climate change. We report evidence that climate change has contributed to deteriorating reproductive success in a rapidly declining population of the grey jay ( Perisoreus canadensis ) at the southern edge of its range. This non-migratory bird of boreal and subalpine forest lives on permanent territories, where it hoards enormous amounts of food for winter and then breeds very early, under still-wintry conditions. We hypothesized that warmer autumns have increased the perishability of hoards and compromised subsequent breeding attempts. Our analysis confirmed that warm autumns, especially when followed by cold late winters, have led to delayed breeding and reduced reproductive success. Our findings uniquely show that weather months before the breeding season impact the timing and success of breeding. Warm autumns apparently represent hostile conditions for this species, because it relies on cold storage. Our study population may be especially vulnerable, because it is situated at the southern edge of the range, where the potential for hoard rot is most pronounced. This population's demise may signal a climate-driven range contraction through local extinctions along the trailing edge.
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Shahmohammadi, Amir, James B. P. Lim, and George Charles Clifton. "Portal Frames with a Novel Cold-Formed Tapered Box-Section." Key Engineering Materials 763 (February 2018): 301–9. http://dx.doi.org/10.4028/www.scientific.net/kem.763.301.
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This paper introduces a novel steel portal frame system, in which cold-formed nested tapered box members are used in the design. The bird and dust proofing features of the system make it useful for applications where clean work areas are required, such as food, storage, and manufacturing industries. The new section used in the portal frames comprises two cold-formed channels welded to each other, forming a box-shaped steel member, either tapered or prismatic along its length. Such sections possess high torsional stiffness compared with the conventional I-sections; therefore, lateral bracing employed for the flexural-torsional buckling suppression of I section portal frames is mostly unnecessary. A comparative study, taking into account the cost of steel, painting, bird proofing and lateral bracing, is conducted between a number of portal frames with the proposed box-sections and the conventional I-sections. An analysis and design code, incorporating the Genetic Algorithm (GA), is developed to optimise the weight of the designed frames. The results indicate that the novel portal frame system is economically viable with additional benefits of bird and dust proofing. To investigate the failure modes and verify design procedure of the new portal frame, an experimental testing program is undertaken in University of Auckland. The test results show excellent behaviour and good agreement with the numerical models but have been completed too recently to be included in this paper.
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CARRAMIÑANA, JUAN J., JAVIER YANGÜELA, DOMINGO BLANCO, CARMINA ROTA, ANA I. AGUSTIN, AGUSTIN ARIÑO, and ANTONIO HERRERA. "Salmonella Incidence and Distribution of Serotypes throughout Processing in a Spanish Poultry Slaughterhouse." Journal of Food Protection 60, no. 11 (November 1, 1997): 1312–17. http://dx.doi.org/10.4315/0362-028x-60.11.1312.
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A survey of contamination with Salmonella spp. was done at 11 sampling sites in a poultry slaughter establishment in Spain for a total of 192 samples. Samples included fecal material, utensils, water, and poultry carcasses and livers at several stages of processing. Salmonella incidence rates increased from 30% in fecal material collected from incoming birds to 60% in air-chilled carcasses and 80% in cold-stored livers, indicating that cross-contamination occurred. The rate of incidence of Salmonella organisms on carcasses averaged 56.7% through post-picking to post-air chilling and reached a maximum of 70% on carcasses at the post-spray wash site. Poultry livers were more heavily contaminated with salmonellae, as 55% and 80% samples after evisceration and cold storage, respectively, were positive for those pathogenic bacteria. From a total of 112 strains isolated, 87 (77.6%) were S. enteritidis, 7 (6.2%) Salmonella serotype 4,5,12:b:-(II), and 6 (5.4%) Salmonella serotype 4,12:b:-(II), and the remaining 12 strains were equally distributed among S. typhimurium. S. virchow, and S. blockley (3.6% each). Serotypes isolated from feces were later detected in matched carcasses and livers indicating a cross-contamination of carcasses by endogenous microflora in bird feces. The incidence of Salmonella serotype 4,5, 12:b:-(II) and that of S. typhimurium were significantly higher (P < 0.05) in samples obtained prior to evisceration than in those collected after that particular step. The situation with S. enteritidis was quite the reverse, since this serotype was more frequently detected in samples taken after the evisceration step (P < 0.01).
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Naguman, P. N., A. A. Zhorabek, A. S. Amanzholova, I. V. Kulakov, and A. N. Rakhimbaeva. "PHYTONCIDES IN THE COMPOSITION OF COMMON BIRD CHERRY." SERIES CHEMISTRY AND TECHNOLOGY 447, no. 3 (June 12, 2021): 70–75. http://dx.doi.org/10.32014/2021.2518-1491.53.
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Everyone knows that forest air is very good for health, and one of the most important reasons for this is the presence of phytoncides in it, which kill or suppress pathogens and have a healing effect. Also, phytoncides are one of the factors of the natural immunity of plants (plants sterilize themselves with the products of their vital activity). Their large number is allocated by plants. One of them is the common bird cherry. Cherry-a representative of the genus of plums of the Rosaceae family. The view includes low trees and shrubs. Cheremukha-forest orderly. Its flowers and leaves are rich in phytoncides, thanks to which they exude an alluring aroma. However, when they break down, they release prussic acid, which is dangerous for all living things. This gave them the opportunity to attract and destroy pests. Phytoncides are volatile biologically active substances formed by plants that kill or inhibit the growth and development of bacteria, microscopic fungi, and protozoa. In addition to all of the above, bird cherry has exceptional properties. The strong, somewhat intoxicating scent of flowers and leaves cleanses the air of germs. Antimicrobial properties of phytoncides have led to a large number of studies on their use in medicine, veterinary medicine, plant protection, storage of fruit and vegetable products, in the food industry and other areas of practice. Almost all parts of the plant have bactericidal, fungicidal and insecticidal properties. In folk medicine, bird cherry has long been used as an astringent, fixing, anti-inflammatory and anti-scurvy agent. Bird cherry produces the most powerful phytoncides containing prussic acid. Protozoa die under the influence of bird cherry phytoncides in 5 minutes. On the basis of numerous studies, the time of death of protozoa after noncontact exposure to phytoncidal plants has been established. Especially a lot of phytoncides are released by young leaves in spring and summer, in autumn phytoncides are released much less. The presence of tannins and essential oil in the fruit has an anti-inflammatory effect, which is used to treat inflammatory processes in the gastrointestinal tract and dysentery. The infusion of cherry fruits has a destructive effect on microorganisms. Preparations of the fruits of the common cherry have an antiseptic effect. They are used in dental practice in the treatment of inflammatory processes of the oral mucosa, paradontosis, toothache and hypovitaminosis.
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Duangsi, Rachen, and Wiraya Krongyut. "Effects of farming system and maturity stage on quality, storability and antioxidant content of bird chilli pepper (Capsicum annuum cv. Huaraea SK.13) subjected to cold storage." International Journal of Postharvest Technology and Innovation 1, no. 1 (2020): 1. http://dx.doi.org/10.1504/ijpti.2020.10030958.
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Sheppard, S. C., S. Bittman, and J. Tait. "Monthly NH3 emissions from poultry in 12 Ecoregions of Canada." Canadian Journal of Animal Science 89, no. 1 (March 1, 2009): 21–35. http://dx.doi.org/10.4141/cjas08055.
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Management of ammonia (NH3) is a multi faceted issue for farmers. It is simultaneously a toxicant that can affect farm worker and animal health, a volatile plant nutrient that is expensive to replace if lost, and a potential contributor to environmental degradation. The environmental implications have important spatial and temporal dimensions, beyond the farm. This paper describes a model developed to estimate NH3 emissions from poultry (broiler, layer and turkey) production in 2780 mapping units across Canada on a monthly time scale. It includes estimates of daily emission peaks within critical months. The results will contribute to estimates of haze and atmospheric aerosol production, as well as contributions to other potential impacts such as eutrophication of sensitive ecosystems. The model is based on a detailed survey of farm practices. Emissions vary strongly throughout the year, and in many regions there are peak emissions in early spring and late fall, associated with landspreading of manure. There are also markedly different nitrogen excretion rates among regions, and these and bird populations are the key factors controlling emissions. On average, 22% of excreted uric acid or ammoniacal N is emitted from barns, 2% from storage and 26% from landspreading, resulting in a total loss of 50%. Key words: Ammonia, PM2.5, acid rain, nitrogen
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Strickland, Dan. "Juvenile dispersal in Gray Jays: dominant brood member expels siblings from natal territory." Canadian Journal of Zoology 69, no. 12 (December 1, 1991): 2935–45. http://dx.doi.org/10.1139/z91-414.
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Breeding pairs of Gray Jays (Perisoreus canadensis) in Quebec and Ontario were accompanied in the autumn significantly more often by one nonbreeder, and less often by none or two, than expected from initial brood size frequencies. Among the rare cases of two nonbreeders accompanying a pair, there was no evidence that both were from the same brood. These observations, and the fact that 30.6% of single nonbreeders closely associated with autumn pairs of known, same-year breeding history were unrelated to those adults, indicated the division of juvenile Gray Jays into "stayers," which remained with their parents at no more than one per pair, and "leavers," which left their natal territory and sometimes joined an unrelated pair. The weight distribution of 62 stayers indicated that about two-thirds were males. Leavers had a more equal sex ratio and showed a strong tendency to associate with failed breeders. Stayers apparently had much higher first-summer survival than leavers but no significant chance to inherit their natal territory. Gray Jay broods broke up in June, through intrabrood aggression, when the young were 55–65 days old. Stayers were the dominant juveniles that forced out the leavers. Partial June dispersal may function as a type of brood reduction that permits the dominant juvenile to have exclusive access to a parental subsidy of stored food that is reliably adequate for the survival of only one extra bird on the territory. The best models describing the origin and winter acquisition of such a subsidy postulate recovery of stored food by memory and require that the expulsion of subordinate siblings occur at the beginning of the food storage season. The models predict that food stored by Gray Jays in June survives in significant enough quantities to enhance winter survival.
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Krongyut, Wiraya, and Rachen Duangsi. "Effects of farming system and maturity stage on quality, storability and antioxidant content of bird chilli pepper (Capsicum annuum cv. Huaraea SK.13) subjected to cold storage." International Journal of Postharvest Technology and Innovation 7, no. 2 (2020): 156. http://dx.doi.org/10.1504/ijpti.2020.109638.
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Careau, V., J. F. Giroux, G. Gauthier, and D. Berteaux. "Surviving on cached foods — the energetics of egg-caching by arctic foxes." Canadian Journal of Zoology 86, no. 10 (October 2008): 1217–23. http://dx.doi.org/10.1139/z08-102.
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Food-caching by arctic foxes ( Vulpes lagopus (L., 1758)) is a behavioural adaptation thought to increase winter survival, especially in bird colonies where a large number of eggs can be cached during a short nesting season. In this paper, we measured the energy content of greater snow goose ( Chen caerulescens atlantica Kennard, 1927) eggs and evaluated their perishability when cached in tundra soil for a whole summer. We estimated that eggs lost only ~8% of their dry mass over 60 days of storage in the ground. We used published estimates on digestibility of nutrients by arctic foxes to estimate that fresh and stored goose eggs contained 816 and 730 kJ of metabolizable energy, respectively, a difference of 11%. Using information on arctic fox energetics, we evaluated that 145 stored eggs were required to sustain the growth of one pup from the age of 1 to 3 months (nutritional independence). Moreover, 23 stored eggs were energetically equivalent to the average fat deposit of an arctic fox during winter. Finally, we calculated that an adult arctic fox would need to recover 160–220 stored eggs to survive 6 months in resting conditions during cold winter temperatures. This value increased to 480 when considering activity cost. Based on egg acquisition and caching rates observed in many goose colonies, we conclude that cached eggs represent an important source of energy relative to the needs of an arctic fox during winter, and have thus a high fitness value.
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Andrianova, Darya V. "Czech Phraseological Parallels to the Russian Dialect Idioms (Based on the Materials of the Complete Phraseological Dictionary of Russian Folk Dialects)." Philology 18, no. 9 (2020): 19–26. http://dx.doi.org/10.25205/1818-7919-2019-18-9-19-26.
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The article provides a comparative analysis of Czech and Russian literary and dialectal phraseological units that characterize a wealthy person and prosperous life. Contemporary studies mostly deal with literal and colloquial idioms, whereas dialectal phraseology is rarely used for the comparative studies. It may stem from the fact that there are no large dictionaries of Russian dialectal phraseology. For this article, we used the materials for the Phraseological Dictionary of Russian Folk Dialects, which is being prepared under the supervision of prof. V. M. Mokienko. The Russian part of the research is represented by approximately 250 idioms, the Czech part totals about 150 units. Czech and Russian phraseological units were grouped together according to their common internal image,the themes of components, similar syntactic models, or similar logical motivations. As an example in the group that combines Czech and Russian phraseological units with a similar figurative basis, we show the model 'animal or bird refuses to eat any kind of food' known in different languages. There are different variants of the model known to Czech and Russian dialects, which represent different animals and birds, and different types of food. The analysis of the idioms grouped together on the basis of the themes of their components have led to the conclusion that in Czech and Russian idioms, the image of wealth is often interpreted through the images of money, storage, satiety, food (mostly fat-heavy and also sweet – in Russian idioms), fantastic abundance, etc. For the Russian dialect phraseology, we describe one characteristic syntactic model, which marks a rich person: one cannot be reached / hurt with any tool. This model was not found in Czech idioms. A comparative analysis showed that in Russian dialect phraseology, which characterizes a comfortable life, one often observes tautological constructions with the lexeme ‘live’. In the Czech part of the materials, there was no tautology. Thanks to the dialectal phraseology the materials for the comparative study of the Czech and Russian idioms have qualitatively and quantitatively grown. Because of these dialectal units, parallels in the semantics and syntactic structure of many phraseological phrases in the studied languages have been made obvious. We have also managed to identify several Czech-Russian phraseological internationalisms, further historical and etymological study of which seems to bring us closer to the issue of the typological or genetic similarity of these idioms in two Slavic languages. Usage of dialect phraseology also lets us reveal several syntactic features typical only for Russian phraseology.
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Ranade, Ashlesha, Pradeep Kumar Singh, and Neeraj Shrivastav. "Shelf stability of meat pickle developed from Kadaknath." Nutrition & Food Science 50, no. 6 (March 20, 2020): 1163–74. http://dx.doi.org/10.1108/nfs-12-2019-0354.
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Purpose This study aims to have a product with enhanced shelf stability from the Kadaknath bird. It is localized to its native tract in India and is unknown to a major part of the world. As in tropical countries, the meat products prepared have limited shelf-life and restricted market access, hence, the pickle was developed to enhance its access to areas other than a native tract of Kadaknath. Design/methodology/approach The product was developed to assess the effect of cooking and dehydration on sensory and microbial features while enhancing shelf stability. A comparison between cooking methods i.e. steam cooking (SC) and microwave cooking (MC) followed by dehydration to get steam cooked + dehydration (SCD) and microwave cooked + dehydration (MCD) were subjected for the study. Findings The study revealed that sensory evaluation, from 0 to 100 days, for all the sensory parameters indicated that SC and MC samples scored more values than SCD and MCD, however, with the storage the values increased initially on the 20th day followed by a gradual decrease. The total plate count (colony forming unit) on 0 day for SC and MC were 2.51 and 2.46, whereas for SCD and MCD the values were 1.94 and 1.98, respectively, indicating significantly (P = 0.01) lower values in dehydrated meat pickle preparations (SCD and MCD) in comparison to samples prepared without dehydration (SC and MC). Similarly, on the 60th day, the meat pickle treatments mentioned as SC and MC had the yeast and mold counts (colony forming unit) detected as 1.79 and 1.88, respectively, however, the organisms were not detectable in treatments SCD and MCD. Practical implications Developed product may be suitable for long distance marketing and making the local delicacy available to distant places. Originality/value The literature review indicated that though meat pickles have been prepared earlier most of the preparations involved chemical preservatives/antioxidants and trials with hurdles such as dehydration and cooking variations were scanty.
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Andrews, Clare, Erica Zuidersma, Simon Verhulst, Daniel Nettle, and Melissa Bateson. "Exposure to food insecurity increases energy storage and reduces somatic maintenance in European starlings ( Sturnus vulgaris )." Royal Society Open Science 8, no. 9 (September 2021): 211099. http://dx.doi.org/10.1098/rsos.211099.
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Birds exposed to food insecurity—defined as temporally variable access to food—respond adaptively by storing more energy. To do this, they may reduce energy allocation to other functions such as somatic maintenance and repair. To investigate this trade-off, we exposed juvenile European starlings ( Sturnus vulgaris , n = 69) to 19 weeks of either uninterrupted food availability or a regime where food was unpredictably unavailable for a 5-h period on 5 days each week. Our measures of energy storage were mass and fat scores. Our measures of somatic maintenance were the growth rate of a plucked feather, and erythrocyte telomere length (TL), measured by analysis of the terminal restriction fragment. The insecure birds were heavier than the controls, by an amount that varied over time. They also had higher fat scores. We found no evidence that they consumed more food overall, though our food consumption data were incomplete. Plucked feathers regrew more slowly in the insecure birds. TL was reduced in the insecure birds, specifically, in the longer percentiles of the within-individual TL distribution. We conclude that increased energy storage in response to food insecurity is achieved at the expense of investment in somatic maintenance and repair.
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Cork, Susan C. "Iron storage diseases in birds." Avian Pathology 29, no. 1 (February 2000): 7–12. http://dx.doi.org/10.1080/03079450094216.
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Agunga, Robert, and Ruth Sleshi. "Curbing Post Harvest Losses for Food Security: A Survey of Smallholder Farmers in Ethiopia." World Journal of Social Science 5, no. 2 (July 25, 2018): 51. http://dx.doi.org/10.5430/wjss.v5n2p51.
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Reducing post harvest losses (PHL) offers great promise for curbing hunger and reducing food insecurity in Africa.A World Bank 2011 report on Missing Food estimated that if African farmers can reduce PHL by even one percentthat will be an annual savings of US$40 million for Sub-Saharan Africa alone. Our survey of 88 smallholderfarmers in the Gondar Region of Ethiopia found that farmers faced serious to most serious losses caused by rodents,birds and the weather. About 46% of the respondents, expressed serious problems with rodents; 54% had seriousproblems with birds and even higher numbers, 55% and 63% had serious problems with the weather and pests,respectively. Another 28.4% of the farmers complained of very serious problems with birds while half of them hadvery serious problems with rodents. Many of the PHL problems seem to emanate from poor storage. The Universityof Purdue, USA, has invented what it calls the “Purdue Improved Crop Storage Bag,” which is advertised as highlyefficient and relatively inexpensive. We urge agricultural extension systems in Africa to test the effectiveness of thisbag before recommending it to their grain farmers as a means of reducing PHL.
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Clayton, N. S. "The Ontogeny of Food-Storing and Retrieval in Marsh Tits." Behaviour 122, no. 1-2 (1992): 11–25. http://dx.doi.org/10.1163/156853992x00273.
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AbstractMarsh tits, Parus palustris, store food and rely on an accurate spatial memory to retrieve their caches. This study considers the ontogeny of storing and the spatial memory involved in retrieving these caches in juvenile hand-raised marsh tits. Preliminary work showed that these birds began storing and retrieving their caches around the time of feeding independence, suggesting that juveniles do not need to learn from adults. However, storing gradually improved over the first few trials, in terms of the appropriateness of items stored, the efficiency of choosing suitable storage sites and the rate of storing seeds. To answer the question of whether the behavioural improvement is a function of age, experience or both, the retrieval performance of two groups of birds were compared. During the first eight trials (24 days) after nutritional independence from the parents, the two groups were exposed to two different kinds of experience: experienced birds were provided with seeds which they could store and retrieve two hours later, whereas the naive birds were exposed only to the storage sites but they could not store. In the following eight trials, both groups were allowed to store and retrieve their caches. If the improvement was merely a consequence of age (maturation) no difference should be found between the two groups on trial 9. In contrast, if improvement was purely a function of experience then the pattern of improvement in the naive group should follow that of the experienced group, but showing an eight-trial time lag. The results suggested a pattern intermediate between these extremes, indicating that either the development of food-storing was a function of both age and experience or that other differences between the two groups, such as differences in motivation to store and/or experience at handling seeds, were important. In contrast, retrieval performance was better than expected by chance on the first trial it occurred and showed little, if any, improvement.
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Gopinger, E., C. Bavaresco, V. Ziegler, J. S. Lemes, D. C. N. Lopes, M. C. Elias, and E. G. Xavier. "Performance, egg quality, and sensory analysis of the eggs of quails fed whole rice bran stabilized with organic acids and stored for different amounts of time." Canadian Journal of Animal Science 96, no. 2 (June 1, 2016): 128–34. http://dx.doi.org/10.1139/cjas-2015-0144.
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Whole rice bran (WRB) was added to Japanese quail feed, and the effects of stabilization of the WRB with organic acids and its storage for different amounts of time were evaluated with respect to performance and egg quality, centesimal composition, and sensory characteristics. We used 150 90-d-old Japanese quails. We had a 5 × 2 factorial scheme of five storage periods (0, 30, 60, 90, and 120 d), with and without organic acid treatment. To replace corn, 20% WRB was added to the diet. Feed consumption increased for up to 71 d of bran storage (P = 0.01) and then subsequently decreased. An increasing quadratic relationship was observed between egg mass and storage time for up to 71 d of storage (P = 0.03); egg mass then decreased thereafter. The specific gravity of the eggs produced by birds that received treated WRB at 0 d of storage was greater than those of eggs produced by birds that received treated WRB after 90 d of storage. In conclusion, the organic acid treatment maintained the quality of the WRB over up to 120 d of storage and could comprise 20% of the laying quails’ diet without affecting growth performance, egg quality, bromatological composition, or the sensory attributes of the eggs.
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Yang, Wenjuan, Cenchao Shen, Qiaoli Ji, Hongjie An, Jinju Wang, Qingdai Liu, and Zhizhou Zhang. "Food storage material silver nanoparticles interfere with DNA replication fidelity and bind with DNA." Nanotechnology 20, no. 8 (February 2, 2009): 085102. http://dx.doi.org/10.1088/0957-4484/20/8/085102.
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Gopinger, E., E. G. Xavier, V. Ziegler, D. C. N. Lopes, E. L. Krabbe, A. P. Nunes, and M. C. Elias. "Effects of stored whole rice bran treated with organic acids on the performance, nutrient digestibility, intestinal mucosa morphometry, and bone characteristics of broiler chickens." Canadian Journal of Animal Science 99, no. 4 (December 1, 2019): 724–31. http://dx.doi.org/10.1139/cjas-2017-0128.
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This study evaluated the effects of feeding whole rice bran (WRB) stored for different times and treated with a mixture of organic acids on the growth performance, nutrient digestibility, duodenal morphometry, and bone characteristics of broiler chickens. Three hundred and twenty 1-d-old Cobb broilers were used in a 21 d experiment with a completely randomized design. Whole rice bran with five storage times (0, 30, 60, 90, and 120 d) was included at a 12% level in the diets, with eight replicates of eight birds each. A polynomial regression with a significance level of 5% was used. A reduction in daily weight gain was observed in birds fed WRB stored up to 90 d. A quadratic response was observed in the daily feed intake and average body weight of birds fed diets containing WRB treated with a mixture of organic acids and stored up to 90 d. There was a linear increase in the digestibility of crude protein with increased WRB storage time. Apparent metabolizable energy and apparent metabolizable energy corrected for nitrogen showed an increasing quadratic response for up to 60 d of WRB storage and treated with a mixture of organic acids. A quadratic response for the morphometry of intestinal crypts was found. The crypt depth increased as the birds were fed a diet containing WRB treated with a mixture of organic acids, stored up to 30 d and decreased with storage times. In conclusion, WRB treated with a mixture of acetic and propionic acids and stored up to 60 d may be safely added to broiler chicken diets.
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Sabow, Azad, Nazim Abdulla, and Bestoon Ahmad. "The carcass and meat quality characteristics of Japanese quail fed a diet supplemented with powdered Lactuca seriola leaves." Potravinarstvo Slovak Journal of Food Sciences 15 (June 28, 2021): 521–27. http://dx.doi.org/10.5219/1534.
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The present study was aimed to evaluate the effect of dietary supplementation with Lactuca serriola leaves on growth performance, carcass characteristics, meat quality, and its antioxidant stability of Japanese quails. A total of eighty growing quails (1-week old) were distributed into 2 equal groups consisting of 40 birds (5 replicates of 8 birds each). The first group was fed a basal diet without Lactuca serriola leaves (0 g.kg-1 diet) and the second group received diets containing 20 g.kg-1 Lactuca serriola leaves. At age of 6 weeks, quails were slaughtered for meat and carcass examinations. The growth performance for the quails fed with Lactuca serriola leaves diet was similar to that of a control group. Carcass measurements, physical properties, and chemical composition of quail breast meat did not differ between the control and experimental group. However, the inclusion of Lactuca serriola leaves significantly increased the omega-3 polyunsaturated fatty acid content and improved breast meat lipid stability during postmortem refrigerated storage compared to the control diet. In conclusion, dietary supplementation of Lactuca serriola leaves can improve the performance of Japanese quail enrich its meat with an omega-3 polyunsaturated fatty acid, and reduce lipid oxidation during storage.
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Whelan, C. D., P. Monaghan, R. W. A. Girdwood, and C. R. Fricker. "The significance of wild birds(Larus sp.)in the epidemiology of campylobacter infections in humans." Epidemiology and Infection 101, no. 2 (October 1988): 259–67. http://dx.doi.org/10.1017/s0950268800054170.
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During much of the present century, the population of herring gulls in Britain has increased rapidly (Cramp, Bourne & Saunders, 1973; Chabrzyk & Coulson, 1976; Monaghan & Coulson, 1977). Accompanying this changes was an increased utilization by these birds of human waste as a food supply, particularly sewage and refuse emanating from our towns and cities (Monaghan, 1983; Hortonet al.1983). This, coupled with their habits of roosting on agricultural land and water storage reservoirs and of breeding on inhabited buildings, has given rise to concern over the role of these birds in the spread of disease to man and domestic animals (e.g. Fenlon, 1981; Reillyet al.1981; Butterfieldet al.1983; Monaghanet al.1985; Girdwoodet al.1986).
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Dangles, Olivier, and Julie-Anne Fenger. "The Chemical Reactivity of Anthocyanins and Its Consequences in Food Science and Nutrition." Molecules 23, no. 8 (August 7, 2018): 1970. http://dx.doi.org/10.3390/molecules23081970.
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Owing to their specific pyrylium nucleus (C-ring), anthocyanins express a much richer chemical reactivity than the other flavonoid classes. For instance, anthocyanins are weak diacids, hard and soft electrophiles, nucleophiles, prone to developing π-stacking interactions, and bind hard metal ions. They also display the usual chemical properties of polyphenols, such as electron donation and affinity for proteins. In this review, these properties are revisited through a variety of examples and discussed in relation to their consequences in food and in nutrition with an emphasis on the transformations occurring upon storage or thermal treatment and on the catabolism of anthocyanins in humans, which is of critical importance for interpreting their effects on health.
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Boswell, T., R. D. Richardson, R. J. Seeley, M. Ramenofsky, J. C. Wingfield, M. I. Friedman, and S. C. Woods. "Regulation of food intake by metabolic fuels in white-crowned sparrows." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 269, no. 6 (December 1, 1995): R1462—R1468. http://dx.doi.org/10.1152/ajpregu.1995.269.6.r1462.
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Migratory birds rely on increased fat storage and fatty acid utilization to meet seasonal changes of energy expenditure and as a result increase food intake and fat stores before migration. To determine whether their feeding behavior is sensitive to carbohydrate and/or fatty acid utilization, white-crowned sparrows maintained on short daylength (9L15D) were injected intraperitoneally with 2-deoxy-D-glucose (2-DG) or 2,5-anhydro-D-mannitol (2,5-AM). Low doses of 2-DG (25 or 50 mg/kg) had no effect on food intake, and higher doses (100 or 300 mg/kg) significantly suppressed feeding after 1 and 2 h. No dose of 2-DG increased meal size. Similarly, low doses of 2,5-AM (25, 50, or 100 mg/kg) had no effect on food intake, and higher doses (300 and 600 mg/kg) significantly suppressed intake. These data suggest that decreased carbohydrate metabolism does not elicit feeding in this species. Importantly, these drugs, as well as insulin and glucagon, were demonstrated to increase plasma fatty acids as well as to decrease feeding. Injections of tributyrin (100, 300, 600, or 2,000 mg/kg i.p.) or glycerol (300, 450, and 600 mg/kg) also significantly suppressed 60-min and 120-min food intake dose dependently in these birds, and equimolar glucose (1,200 mg/kg) had no effect. We conclude that feeding by the white-crowned sparrow is unresponsive to manipulations of carbohydrate metabolism and is decreased after manipulations that increase plasma lipids.
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Amigo-Benavent, Miryam, Chiara Nitride, Laura Bravo, Pasquale Ferranti, and M. Dolores del Castillo. "Stability and bioactivity of a Bowman–Birk inhibitor in orange juice during processing and storage." Food & Function 4, no. 7 (2013): 1051. http://dx.doi.org/10.1039/c3fo30354c.
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KIM, S. L., K. CONLAN, D. P. MALONE, and C. V. LEWIS. "Possible food caching and defence in the Weddell seal: observations from McMurdo Sound, Antarctica." Antarctic Science 17, no. 1 (February 28, 2005): 71–72. http://dx.doi.org/10.1017/s0954102005002452.
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On the basis of observations of Weddell seals (Leptonychotes weddellii Lesson) made in the course of studying shallow-water benthic communities in McMurdo Sound, Antarctica, we suggest that caching and/or defence of uneaten food may be a strategy practiced by this animal. Such a phenomenon is uncommon but taxonomically widespread among vertebrates. Depending on circumstances, it is termed hoarding, caching, or storage and may be short- or long-term, include defence of the resource, or have other variable expressions, with the common threads being deferred consumption and deterrence of consumption by others (Vanderwall 1990). Many vertebrate taxa exhibit hoarding behaviour, including rodents (e.g. Sciuridae), carnivores (e.g. Canidae, Felinidae) and birds (e.g. Corvidae, Picidae). No form of food caching, to our knowledge, has ever been reported in a wild pinniped.
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Kolodziej, Barbara, Sugier Danuta, and Luchowska Katarzyna. "Changes of antioxidant activity and active compounds content in selected teas." Foods and Raw Materials 8, no. 1 (February 26, 2020): 91–97. http://dx.doi.org/10.21603/2308-4057-2020-1-91-97.
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Our study tested 45 tea infusions classified into five groups (white, green, red, black, and other teas) for the content of total polyphenols and flavonoids, as well as antioxidant properties, by the FRAP and DPPH methods. We examined these parameters after prolongation of the brewing time from 10 to 30 min and overnight storage. The results showed that the capacity of the teas to bind free radicals was differentiated and the amount of anti-oxidant compounds depended on their nature. In terms of antioxidant activity and total polyphenol content, the tested tea types were ranked in the following order: white > green > black > red > other teas (yerba mate > rooibos). Our experiment demonstrated a positive correlation between the polyphenol content and antioxidant activity of the analyzed teas. Also, the DPPH antiradical efficiency was comparable to their ability to reduce ferric ions. The extended brewing time had a significant effect on the antioxidant activity of the infusions and the polyphenolic compounds analyzed therein. In contrast, storage of the infusions for 24 h at room temperature changed their antioxidant activity and affected the total polyphenol content.
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Pravosudov, Vladimir, and Jeffrey Lucas. "Daily patterns of energy storage in food-caching birds under variable daily predation risk: a dynamic state variable model." Behavioral Ecology and Sociobiology 50, no. 3 (August 1, 2001): 239–50. http://dx.doi.org/10.1007/s002650100361.
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Njoroge, Anastasia W., Ibrahim Baoua, and Dieudonne Baributsa. "Postharvest Management Practices of Grains in the Eastern Region of Kenya." Journal of Agricultural Science 11, no. 3 (February 15, 2019): 33. http://dx.doi.org/10.5539/jas.v11n3p33.
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Cereals and legumes play a major role in the production systems and diets of farmers in the semi-arid eastern region of Kenya. Efficient postharvest management can tremendously contribute to food security in these regions. A study was carried out in three counties in eastern Kenya to assess pre and postharvest management practices among farmers. Data was collected using semi-structured questionnaires designed and administered using Kobo Toolbox via android tablets. Results showed that farmers cultivated three main crops: maize (98%), beans 66%), and pigeon peas (28%). The most saved seed crops were beans (80%) and pigeon peas (50%). Majority of the farmers (80%) experienced pre-drying losses due to insects (48%), rodents (40%) and birds (39%). Farmers stored grain for consumption (80%) and for sale (19%). About 48% of farmers stored the grain for more than 9 months. Challenges during grain storage were insects (57%) and rodents (43%). Primary methods of grain preservation included hermetic methods (61%) followed by insecticides (33%). While progress is being made in addressing storage challenges, there still a need to continue building awareness about improved storage technologies and find solutions for pest infestations in the field and drying after harvest.
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Roy, Chanda Rani, Tasnia Ahmed, and Md Aftab Uddin. "Microbiological Analysis of Poultry Feeds Along with the Demonstration of the Antibiotic Susceptibility of the Isolates and the Antibacterial Activity of the Feeds." Bangladesh Journal of Microbiology 34, no. 2 (January 1, 2019): 103–7. http://dx.doi.org/10.3329/bjm.v34i2.39620.
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Poultry farms and poultry product processing industries are increasing worldwide to fill up the expanding demand for protein of the escalating population. To get good growth and more eggs from the domestic birds in the poultry farms, nutritious food supplements are commonly known as the poultry feed provided. These feeds also serve as sources of bacterial, fungal and viral contamination which in turn can cause diseases in the birds and ultimately can infect the consumers if the poultry is not processed and cooked properly. In this study, in order to determine the pathogenic bacterial load five different poultry feed samples sold in local markets of Dhaka city were analyzed. All samples harbored total viable bacteria up to 5.0×106 cfu/gm and total fungal count up to 4.5×105 cfu/gm. While Escherichia coli was absent in all samples; Klebsiella spp. and Aeromonas spp. were found to be present in only one sample (1.4×106 cfu/gm in sample 4 and 2.9×105 cfu/gm in sample 5 respectively). Staphylococcus aureus and Shigella spp. were found to be predominat in all the samples. Pseudomonas spp. and Vibrio spp. were present in 3 and 4 samples, respectively. Aeromonas spp., Vibrio spp., Salmonella spp. and Staphylococcus aureus showed 100% drug resistance towards ER, NA, NVB, KAN antibiotics. The finding of the study emphasis on the prevention of contamination through a sound maintenance of quality during poultry feeds preparation, storage and maintenance. Diseased birds and their excreta must be destroyed during poultry farming. Usage of excess antibiotics must be regulated as suggested from the data of the current study that shows high resistance of the bacterial isolates from the food. Finally, the consumers should process and cook the poultry items properly to save themselves from further food hazards.
Bangladesh J Microbiol, Volume 34 Number 2 December 2017, pp 103-107
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Barre, Annick, Els J. M. Van Damme, Mathias Simplicien, Hervé Benoist, and Pierre Rougé. "Are Dietary Lectins Relevant Allergens in Plant Food Allergy?" Foods 9, no. 12 (November 24, 2020): 1724. http://dx.doi.org/10.3390/foods9121724.
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Lectins or carbohydrate-binding proteins are widely distributed in seeds and vegetative parts of edible plant species. A few lectins from different fruits and vegetables have been identified as potential food allergens, including wheat agglutinin, hevein (Hev b 6.02) from the rubber tree and chitinases containing a hevein domain from different fruits and vegetables. However, other well-known lectins from legumes have been demonstrated to behave as potential food allergens taking into account their ability to specifically bind IgE from allergic patients, trigger the degranulation of sensitized basophils, and to elicit interleukin secretion in sensitized people. These allergens include members from the different families of higher plant lectins, including legume lectins, type II ribosome-inactivating proteins (RIP-II), wheat germ agglutinin (WGA), jacalin-related lectins, GNA (Galanthus nivalis agglutinin)-like lectins, and Nictaba-related lectins. Most of these potentially active lectin allergens belong to the group of seed storage proteins (legume lectins), pathogenesis-related protein family PR-3 comprising hevein and class I, II, IV, V, VI, and VII chitinases containing a hevein domain, and type II ribosome-inactivating proteins containing a ricin B-chain domain (RIP-II). In the present review, we present an exhaustive survey of both the structural organization and structural features responsible for the allergenic potency of lectins, with special reference to lectins from dietary plant species/tissues consumed in Western countries.
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Silversides, F. G., Y. Song, R. Renema, B. R. Rathgeber, and H. L. Classen. "Cryopreservation of germplasm from chickens kept in Canadian research institutions." Canadian Journal of Animal Science 88, no. 4 (December 1, 2008): 577–80. http://dx.doi.org/10.4141/cjas08030.
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Twenty-three genetically distinct lines of chickens are maintained as living populations by Agriculture and Agri-Food Canada and Canada’s eight Faculties of Agriculture. Historically, cryogenic storage of avian genetic material has been difficult, but we have developed techniques of gonadal transplantation to allow recuperation of stored genetic material into living birds. Gonads from 1660 day-old chicks or late-term embryos (810 females and 850 males) from 18 chicken populations from four Canadian institutions were harvested and cryopreserved using dimethylsulfoxide as a cryoprotectant. Future efforts will be directed to completing the collection of the populations kept in Canadian publicly-funded institutions that conduct agricultural research. Key words: Chicken, genetic resources, cryopreservation, gonads
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Dawlal, P., C. Brabet, M. S. Thantsha, and E. M. Buys. "Potential of lactic acid bacteria for the reduction of fumonisin exposure in African fermented maize based foods." World Mycotoxin Journal 10, no. 4 (November 30, 2017): 309–18. http://dx.doi.org/10.3920/wmj2017.2184.
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Maize, which contributes to a large portion of the African diet and serves as the base substrate for many fermented cereal products, has been reported to be contaminated with fumonisins. This study aimed to evaluate the in vitro ability of predominant lactic acid bacteria (LAB) in African traditional fermented maize based foods (ogi and mahewu) to bind fumonisin B1 (FB1) and B2 (FB2), as well as the stability of the complex at different pH and temperatures, in particular observed during ogi fermentation and under its storage conditions (time, temperature). The percentage of bound fumonisins was calculated after analysing the level of fumonisins not bound to LAB after a certain incubation time, by HPLC. The results revealed the ability of all tested LAB strains to bind both fumonisins, with binding efficiencies varying between strains and higher for FB2. Binding of fumonisins increased with a decrease in pH from 6 to 4 (observed during the ogi fermentation process) and from 4 to 2 (acidic pH in the stomach), and an increase in temperature (from 30 to 37 °C). The percentage of FB1 and FB2 bound to LAB at pH 4 decreased after 6 days of storage at 30 °C for all LAB strains, except for Lactobacillus plantarum (R1096) for which it increased. Lactobacillus species (L. plantarum and Lactobacillus delbrueckii) were the most efficient in binding FB1 and FB2, whereas Pediococcus sp. was less efficient. Therefore, the Lactobacillus strains tested in this study can be recommended as potential starter cultures for African traditional fermented maize based foods having detoxifying and probiotic properties.
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Pálfy, Tamás, Istvánné Hermán, Andrea Lugasi, Mária Vadáné Kovács, István Erdélyi, and János Gundel. "Effect of raised level α-linolenic fatty acid diet on broiler meat quality." Acta Agraria Debreceniensis, no. 26 (July 16, 2007): 29–33. http://dx.doi.org/10.34101/actaagrar/26/3050.
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The aim of our investigation was to determine the effects of increased α-linolenic content in food on the colour, total pigment content, organoleptic characteristics and oxidative stability of poultry meat. The experiment was carried out with 1200 Ross-308 cock chicklings. Birds were fed three-phase diets, contained four different fat sources: lard, sunflower oil, flaxseed oil and soybean oil. According to the experiment, the different oil sources had no effect on growth performance, but the fatty acid composition of diets was reflected in the meat fatty acid profile. We could detect just slight change in colour in the treated meat, which was not caused by the decreased pigment content. The detected change in colour during the storage was not in relation to initial PUFA content. TBA level did not prove the accelerated lipid peroxidation which was expected in case of higher α-linolenic containing the meat. The data obtained in meat storage trial, could not prove clearly the negative effect of the higher α-linolenic content of the meat.
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Diaz-Vargas, Mayra, Alice Eiko Murakami, Paula Toshimi Matumoto Pintro, Ivan Camilo Ospina-Rojas, Caio Henrique Pereira de Souza, and Cinthia Eyng. "Dehydrated citrus pulp in broiler diets." Canadian Journal of Animal Science 99, no. 1 (March 1, 2019): 33–40. http://dx.doi.org/10.1139/cjas-2017-0087.
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The objective of this study was to evaluate the effects of citrus pulp in diet for broilers on weight of gastrointestinal organs, intestinal morphometry, and quality and lipid oxidation of broiler meat during the storage time. A total of 966 Cobb male broiler chicks were fed six increasing levels of dietary citrus pulp (0%, 2%, 4%, 6%, 8%, and 10%) with seven replications of 23 birds each. The inclusion of citrus pulp in the diet of broilers from 1 to 21 d of age did not significantly affect organ weight and intestinal morphology (P > 0.05). However, the citrus pulp can be used up to 10% inclusion in diets for broilers from 1 to 42 d of age, without impairing broiler performance, carcass yield, intestinal morphometry, and meat quality. For lipid oxidation, samples of thigh were used in a 6 × 4 factorial design (six dietary levels of citrus pulp and four storage periods) with four replications. In the treatments with 10% citrus pulp, the phenolic compounds present in the by-product led to a delayed and reduced oxidation.
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Bond, Jeanine C., and Daniel Esler. "Nutrient acquisition by female Harlequin Ducks prior to spring migration and reproduction: evidence for body mass optimization." Canadian Journal of Zoology 84, no. 9 (September 2006): 1223–29. http://dx.doi.org/10.1139/z06-111.
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We analysed variation in body mass of adult female Harlequin Ducks ( Histrionicus histrionicus (L., 1758)) on coastal wintering sites in southern British Columbia, Canada, to investigate nutrient acquisition prior to migration and reproduction. On average, female mass increased by 7% from late winter to premigration; however, the chronology of mass gain varied depending on prey type. Females feeding on superabundant roe from spawning Pacific herring ( Clupea pallasii Valenciennes, 1847) became considerably heavier than they had been before the herring spawning period (March) and appeared to be heavier than females eating marine invertebrates such as crabs, limpets, and snails during the herring spawning period. By mid-April, prior to migration, females at all sites had similar body masses, with birds at sites without spawn gaining mass and those at sites with spawn maintaining their earlier mass gain. Stable isotope analyses confirmed that birds at these different sites consumed very different diets. These results suggest that female Harlequin Ducks target an optimal premigratory body mass, regardless of whether they have access to a superabundant food source; this body mass is presumably shaped by the costs and benefits of nutrient storage for migration and reproduction.
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Nash, D. M., R. M. G. Hamilton, K. A. Sanford, and H. W. Hulan. "The effect of dietary menhaden meal and storage on the omega-3 fatty acids and sensory attributes of egg yolk in laying hens." Canadian Journal of Animal Science 76, no. 3 (September 1, 1996): 377–83. http://dx.doi.org/10.4141/cjas96-055.
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The effect of dietary menhaden meal (MM) on production and egg yolk lipids of commercial White Leghorn hens was studied for 350 d. One hundred and ninety-two birds were given a corn-wheat-soybean diet that contained either 0, 4, 8, or 12% MM. Analysis of the egg yolks at four periods in the laying cycle (162, 211, 254, and 289 d) was performed on the fresh and stored (4 wk at 4 °C, [Formula: see text]) egg yolks. Sensory evaluation was performed on fresh eggs collected at the end of the laying cycle (448 d).Production whether measured as hen-day or hen-housed, increased linearly with the inclusion of MM in the diets. The level of eicosapentaenoic and docosahexaenoic acids increased 10- and 2.6-fold to give levels of 9 and 95 mg yolk−1, respectively. Storage had no effect (P > 0.05) on these parameters. Sensory data suggested that the level of MM in the diets of laying hens should be between 4 and 8% in order to avoid off-flavours in eggs. Key words: Menhaden meal, laying hens, omega-3 fatty acids, storage, eicosapentaenoic acid, docosahexaenoic acid
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Kanter, Julie, Dk McLaughlin, J. Dimitry, S. Rogers, Pj Kell, WA Frazier, and A. Doctor. "Platelets in Storage: Altered S-Nitrosothiol Metabolism and Decreased Responsiveness May Be Related." Blood 112, no. 11 (November 16, 2008): 1995. http://dx.doi.org/10.1182/blood.v112.11.1995.1995.
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Abstract Under normal physiologic conditions, platelets circulate in an inactivated state and require only minimal stimulation ensuring their immediate availability for hemostasis. Previous research has shown that during platelet pheresis and storage, platelets undergo early activation resulting in expression of the surface activation marker CD62, release of α granule contents, and a decrease in inducible activation. In addition to regulating vascular tone, nitric oxide (NO) groups in plasma may provide tonic inhibition to circulating platelets thereby preventing the inappropriate adhesion and aggregation seen in stored platelets. S-Nitrosothiols (RSNOs) may serve as a reservoir for nitric oxide (NO) in the normal circulation. We hypothesize that platelets are prematurely activated during the process of apheresis in part due to the lack of RSNOs in the microenvironment during collection and storage. Furthermore, RSNO metabolism by stored platelets is changed by the process of apheresis itself. To test this hypothesis, we monitored the activation status of platelets using CD62 flow cytometry and quantified intracellular NO content and uptake using the fluorescence probe diaminodifluorofluorescein diacetate (DAF-FM DA). Both measurements were made on freshly isolated platelets (Fl-Plts) and on apheresis platelets (A-Plts). In addition, we employed these techniques to evaluate the responsiveness of Fl-Plts and A-Plts to agonists [thrombin receptor activating peptide (TRAP), ADP, and collagen] and to NO-donating molecules after varying storage times. In preliminary studies we have found that Fl-Plts bind RSNOs and demonstrate steroselectivity in their degree of uptake. Fl-Plts incubated with L-RSNOs produce over 2-fold the fluorescence compared to Fl-Plts incubated with D-RSNOs. A-Plts lose this stereoselectivity in RSNO uptake following the collection and storage process. We have also found that A-Plts have up to a 10-fold increase in uptake of nitric oxide from RSNOs compared to Fl-Plts. This significant increase and loss of stereoselectivity in RSNO uptake in A-Plts correlates with the loss of inducible activation over storage time. These data suggest RSNO metabolism in platelets is fundamentally altered during apheresis, collection, and storage and provides a novel target with therapeutic potential for further investigation into the loss of platelet function during storage.
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Miller, David J. "411 Sperm movement, storage, and release from the oviduct." Journal of Animal Science 98, Supplement_4 (November 3, 2020): 188. http://dx.doi.org/10.1093/jas/skaa278.347.
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Abstract After semen deposition, a fraction of sperm is transported through the female reproductive tract to the lower oviduct, the isthmus, where sperm are retained to form a reservoir. Some of these sperm are released to move to the upper oviduct, the site of fertilization. For sperm to make this journey, they must overcome challenges including possible phagocytosis, high fluid viscosity, and peristaltic contractions of the tract. The study of sperm transport is complex because so few sperm reach the site of fertilization. We have focused our studies on how sperm are retained in the reservoir, how storage prolongs sperm lifespan, and how sperm are released to fertilize oocytes. Sperm storage is particularly important in situations in which ovulation is not tightly synchronized with semen deposition. This occurs in domestic animals, but is especially notable in some species of bats, birds, and insects. Using porcine sperm and an array of 400 common glycans, we identified two specific glycan motifs found in all structures that bound sperm, a Lewis X trisaccharide and a branched 6-sialylated oligosaccharide. Tandem MS profiling indicated that both motifs were abundant in the asparagine-linked glycans of the oviduct epithelium and several larger oligosaccharides were identified that contained both motifs. When these motifs were immobilized, each could retain sperm, suppress Ca2+ influx and lengthen sperm lifespan. Secretions from the cumulus-oocyte complex (COC) and progesterone released sperm from immobilized oviduct glycans, suggesting that COCs can themselves signal sperm release. Progesterone-induced release required CatSper channels, sperm hyperactivation and was dependent on sperm protein degradation. These studies support a model in which sperm are retained in the isthmus by specific glycans on the epithelium, which extends sperm lifespan until COCs produce releasing factors that promote sperm liberation from the isthmus and movement to the ampulla to fertilize the COCs.
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Aprodu, Iuliana, Ștefania Adelina Milea, Roxana-Mădălina Anghel, Elena Enachi, Vasilica Barbu, Oana Crăciunescu, Gabriela Râpeanu, Gabriela Elena Bahrim, Anca Oancea, and Nicoleta Stănciuc. "New Functional Ingredients Based on Microencapsulation of Aqueous Anthocyanin-Rich Extracts Derived from Black Rice (Oryza sativa L.)." Molecules 24, no. 18 (September 18, 2019): 3389. http://dx.doi.org/10.3390/molecules24183389.
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The aqueous anthocyanin-rich extract derived from black rice (Oryza sativa L.) was encapsulated by freeze drying using milk proteins and peptides as coating materials. The molecular modelling approach indicated that all major casein fractions and whey proteins were able to bind at least one anthocyanin molecule. The hydrophobic interactions and hydrogen bonding across the interfaces appeared to be mainly responsible for the stabilizations of the complexes formed between the coating material and bioactive compounds. Two dark purple colored powders, differentiated by the ratio of the encapsulation materials used, rich in phytochemicals were obtained, with an encapsulation efficiency of up to 99%. The powders were tested for antioxidant activity, cytocompatibility, and thermal stability. The morphological structure of the powders highlighted the presence of encapsulated anthocyanins. Both powders showed a remarkable antioxidant activity of about 46 mM Trolox/g D.W., and cytocompatibility on the L929 fibroblast culture. At certain concentrations, both powders stimulated cell proliferation. The powders showed a good thermal stability between 75 and 100 °C for 15 min. The powders were tested in a food model system and checked for stability of phytochemicals during storage. The added value of the powders was demonstrated throughout the antioxidant activity, which remained unchanged during storage.
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Castruita, M., M. Saito, P. C. Schottel, L. A. Elmegreen, S. Myneni, E. I. Stiefel, and F. M. M. Morel. "Overexpression and Characterization of an Iron Storage and DNA-Binding Dps Protein from Trichodesmium erythraeum." Applied and Environmental Microbiology 72, no. 4 (April 2006): 2918–24. http://dx.doi.org/10.1128/aem.72.4.2918-2924.2006.
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ABSTRACT Although the role of iron in marine productivity has received a great deal of attention, no iron storage protein has been isolated from a marine microorganism previously. We describe an Fe-binding protein belonging to the Dps family (DNA binding protein from starved cells) in the N2-fixing marine cyanobacterium Trichodesmium erythraeum. A dps gene encoding a protein with significant levels of identity to members of the Dps family was identified in the genome of T. erythraeum. This gene codes for a putative Dps T. erythraeurm protein (Dpstery) with 69% primary amino acid sequence similarity to Synechococcus DpsA. We expressed and purified Dpstery, and we found that Dpstery, like other Dps proteins, is able to bind Fe and DNA and protect DNA from degradation by DNase. We also found that Dpstery binds phosphate, like other ferritin family proteins. Fe K near-edge X-ray absorption of Dpstery indicated that it has an iron core that resembles that of horse spleen ferritin.
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Gotsch, Sybil G., Nalini Nadkarni, and Autumn Amici. "The functional roles of epiphytes and arboreal soils in tropical montane cloud forests." Journal of Tropical Ecology 32, no. 5 (July 13, 2016): 455–68. http://dx.doi.org/10.1017/s026646741600033x.
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Abstract:Epiphytes and their associated decomposing litter and arboreal soils (herein, epiphytic material, EM) are ubiquitous features of tropical montane cloud forests (TMCF) and play important roles in ecosystem function. EM intercepts water and nutrients from the atmosphere and from intercepted host tree sources, and may contribute significant inputs of these resources to the forest floor. Despite the importance of EM in the TMCF, a systematic review of the ecosystem roles of EM has not been compiled before. We have synthesized the literature that documents functions of EM in undisturbed TMCFs and discuss how these roles may be affected by disturbances, including changes in climate and land use. The range of EM biomass and water storage in the TMCF varies greatly across sites, with different amounts associated with stand age and microclimate. EM is important as habitat and food for birds and mammals, with over 200 species of birds documented as using EM in the Neotropics. Given its sensitivity to moisture, projected shifts in cloud base heights or precipitation due to changes in climate will likely have a large impact on this community and changes in EM diversity or abundance may have cascading impacts on the ecosystem function of the TMCF.
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ROMERO, MARIA G., AUBREY F. MENDONCA, DONG U. AHN, and IRENE V. WESLEY. "Influence of Dietary Vitamin E on Behavior of Listeria monocytogenes and Color Stability in Ground Turkey Meat following Electron Beam Irradiation." Journal of Food Protection 68, no. 6 (June 1, 2005): 1159–64. http://dx.doi.org/10.4315/0362-028x-68.6.1159.
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There is growing concern that the free radical scavenging effect of antioxidants added to meats might reduce the antimicrobial effectiveness of ionizing radiation. A study was conducted to determine the effect of vitamin E on the behavior (growth) of Listeria monocytogenes and color stability in turkey meat following electron beam irradiation. Raw ground turkey breast meat from birds fed diets containing 0 (control), 50, 100, and 200 IU/kg of vitamin E was inoculated with a five-strain mixture of L. monocytogenes to give approximately 107 CFU/g. Inoculated samples were irradiated at 0, 0.5, 1, and 2 kGy and stored aerobically (12 days) or under vacuum (42 days) at 4°C. L. monocytogenes survivors were determined by plating samples on modified Oxford medium and counting colonies on modified Oxford medium plates after 48 h at 35°C. Meat color was measured using a colorimeter. Irradiation at 2.0 kGy resulted in an approximately 3.5-log reduction of initial numbers of L. monocytogenes. There were no significant differences in D-values (decimal reduction times) for L. monocytogenes in meat irrespective of vitamin E treatment (P > 0.05). Also, vitamin E treatments did not affect growth of the pathogen in aerobic or vacuum-packaged samples following irradiation (P > 0.05). Compared with controls, irradiated meat from birds fed 100 or 200 IU/kg of vitamin E demonstrated significant improvement in color stability (lightness and redness values) during aerobic storage (P < 0.05). Dietary vitamin E (100 to 200 IU/kg) has good potential for improving the color stability of turkey meat without compromising the microbial safety of the irradiated product.
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Aksu, M. I., M. Karaoglu, N. Esenbuga, M. Kaya, and M. Macit. "Effect of Meat Piece, Packaging and Storage on pH, Thiobarbituric Acid Reactive Substances and Microbial Counts in Broilers Fed Diets Supplemented with Ram Horn Hydrolysate." Food Science and Technology International 12, no. 2 (April 2006): 133–43. http://dx.doi.org/10.1177/1082013206064192.
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This research was carried out to determine the effects of meat piece, packaging type and storage time on the pH, thiobarbituric acid reactive substances (TBARS), total mesophilic, total psychrotrophic, lactic acid and Enterobacteriaceae counts at 0, 2, 4, 6, 8, 10 and 12 days of storage, in broilers fed diets containing 0% (H0), 1% (H1), 2% (H3) and 3% (H3) levels of ram horn hydrolisate (RHH) in daily water requirements of chicks during experimental periods. A total of 240 male broiler chicks ( Ross-308) were allocated to four dietary treatments (H0, H1, H2 and H3 groups) in a completely randomized experimental design. RHH-added water and feed were offered ad libitum consumption for the first 28 days of the experiment; and then they were fed only a basal diet and normal drinking water to the end of the study. At the end of the trial all the birds were slaughtered, then standard dissection of carcasses, breasts and drumsticks were divided into two groups for vacuum and aerobic packaging. Packed breasts and drumsticks were stored at 3 ± 0.5°C for 12 days, and the pH, TBARS and microbial counts were determined during the storage period. The use of ram horn hydrolysate at 1% and 3% levels in broiler diets increased pH values of breast fillets and drumstick meats ( p < 0.01). TBARS value ( p < 0.01) and Enterobacteriaceae counts ( p < 0.01) decreased compared to the control group. pH, TBARS and Enterobacteriaceae counts were lower ( p < 0.05) in breast fillets than drumstick muscles. The pH, TBARS and bacteria counts increased during storage ( p < 0.01). The vacuum packaging preserved the meat quality properties of broiler breast fillets and drumsticks meats ( p < 0.05). The results obtained from the present study, concluded that the use of ram horn hydrolysate in broiler diet decreased lipid oxidation of the broiler breast and drumstick meats, and the level of Enterobacteriaceae was also reduced in vacuum packed samples during the storage period.
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Fu, Xinmiao, Pan Wang, Masayuki Fukui, Cheng Long, Linxiang Yin, Hye Joung Choi, and Bao Ting Zhu. "PDIp is a major intracellular oestrogen-storage protein that modulates tissue levels of oestrogen in the pancreas." Biochemical Journal 447, no. 1 (September 12, 2012): 115–23. http://dx.doi.org/10.1042/bj20120868.
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E2 (17β-oestradiol), a female sex hormone, has important biological functions in a woman's body. The pancreas, often considered a non-classical E2-targeting organ, is known to be functionally regulated by E2, but little is known about how oestrogen actions are regulated in this organ. In the present study we report that PDIp (pancreas-specific protein disulfide isomerase), a protein-folding catalyst, can act as a major intracellular E2 storage protein in a rat model to modulate the pancreatic tissue level, metabolism and action of E2. The purified endogenous PDIp from both rat and human pancreatic tissues can bind E2 with a Kd value of approximately 150 nM. The endogenous PDIp-bound E2 accounts for over 80% of the total protein-bound E2 present in rat and human pancreatic tissues, and this binding protects E2 from metabolic disposition and prolongs its duration of action. Importantly, we showed in ovariectomized female rats that the E2 level in the pancreas reaches its highest level (9-fold increase over its basal level) at 24–48 h after a single injection of E2, and even at 96 h its level is still approximately 5-fold higher. In contrast, the E2 level in the uterus quickly returns to its basal level at 48 h after reaching its maximal level (approximately 2-fold increase) at 24 h. Taken together, these results show for the first time that PDIp is a predominant intracellular oestrogen storage protein in the pancreas, which offers novel mechanistic insights into the accumulation and action of oestrogen inside pancreatic cells.
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Pascual, Mònica, Marta Hugas, Jose Ignacio Badiola, Josep Maria Monfort, and Margarita Garriga. "Lactobacillus salivarius CTC2197 Prevents Salmonella enteritidis Colonization in Chickens." Applied and Environmental Microbiology 65, no. 11 (November 1, 1999): 4981–86. http://dx.doi.org/10.1128/aem.65.11.4981-4986.1999.
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ABSTRACT A rifampin-resistant Lactobacillus salivarius strain, CTC2197, was assessed as a probiotic in poultry, by studying its ability to prevent Salmonella enteritidis C-114 colonization in chickens. When the probiotic strain was dosed by oral gavage together with S. enteritidis C-114 directly into the proventriculus in 1-day-old Leghorn chickens, the pathogen was completely removed from the birds after 21 days. The same results were obtained when the probiotic strain was also administered through the feed and the drinking water apart from direct inoculation into the proventriculus. The inclusion of L. salivarius CTC2197 in the first day chicken feed revealed that a concentration of 105 CFU g−1 was enough to ensure the colonization of the gastrointestinal tract of the birds after 1 week. However, between 21 and 28 days, L. salivarius CTC2197 was undetectable in the gastrointestinal tract of some birds, showing that more than one dose would be necessary to ensure its presence till the end of the rearing time. Freeze-drying and freezing with glycerol or skim milk as cryoprotective agents, appeared to be suitable methods to preserve the probiotic strain. The inclusion of the L. salivarius CTC2197 in a commercial feed mixture seemed to be a good way to supply it on the farm, although the strain showed sensitivity to the temperatures used during the feed mixture storage and in the chicken incubator rooms. Moreover, survival had been improved after several reinoculations in chicken feed mixture.