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Letteratura scientifica selezionata sul tema "Eggs Production"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 20 febbraio 2023

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Articoli di riviste sul tema "Eggs Production"

Yenice, G., O. Kaynar, M. Ileriturk, F. Hira e A. Hayirli. "Quality of eggs in different production systems". Czech Journal of Food Sciences 34, No. 4 (5 settembre 2016): 370–76. http://dx.doi.org/10.17221/33/2016-cjfs.

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This experiment was carried out to compare morphological egg quality parameters, as well as lipid and protein profiles, of brown eggs laid by chickens reared under different production systems: cage, free-range, and family type. A total of 270 brown eggs were obtained from commercial poultry companies raising Lohmann Brown laying hens in a cage system and free-range unit as well as families possessing hens in their yards. The egg lipid and protein contents, as well as lipid and protein profile, varied among the production systems. However, eggs from the free-range system had similar characteristics to those from the cage system. Quality of eggs from the family type system was quite variable. In conclusion, egg quality can be affected by the production system.

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Chaudhari, D. J., e A. S. Tingre. "Forecasting eggs production in India". Indian Journal of Animal Research 49, n. 3 (2015): 367. http://dx.doi.org/10.5958/0976-0555.2015.00143.0.

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Cargill, Peter. "Achieving sustainable production of eggs". Avian Pathology 47, n. 3 (14 marzo 2018): 334–35. http://dx.doi.org/10.1080/03079457.2018.1445067.

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Binh Nguyen, Tran Thi, Nguyen Huu Duc e Nguyen Thi Dieu Thuy. "ASSOCIATION OF PROLACTIN GENE POLYMORPHISM WITH EGG PRODUCTION TRAIT IN LIEN MINH CHICKEN". Vietnam Journal of Biotechnology 16, n. 2 (17 dicembre 2018): 259–66. http://dx.doi.org/10.15625/1811-4989/16/2/13435.

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Lien Minh chicken is an indigenous breed with several favorable properties, such as good meat quality and associated with the economic development of the people in the Lien Minh village, Cat Hai, Hai Phong. Chicken prolactin is a candidate gene involved in egg production trait. The aim of this study was to investigate the association of single nucleotide polymorphism (SNP) of Prolactin gene (PRL) concerning with reproductive trait in Lien Minh chicken. All hens were kept in individual laying cage and phenotypic data for total 90 hens were recorded as following: age at first egg, first egg’s weight, number of eggs, eggs’ weight, and eggs’ shape index. Blood samples were used for DNA extraction and then genotyping by PCR-RFLP method. Two SNPs of PRL gene were analyzed including: 24 bp indel in promoter (PRL24) and C2402T in 5' flanking region (PRL5). The polymorphic sites at PRL24 and PRL5 showed two genotypes with the frequency of ID (0.27), DD (0.73) and CT (0.41), TT (0.59), respectively. Allele frequencies of PRL24 and PRL5 were: I (0.13), D (0.87) and C (0.21), T (0.79), respectively. Genotypes ID PRL24 and CT at PRL5 showed the highest values of mean weight of eggs 47.57 ± 3,11 g and 46.91 ± 4.29 g, respectively (P < 0.05). In addition, the individual with genotype ID, CT also gave better reproductive characteristics such as number of eggs, first egg’s weight. These results suggested that the beneficial alleles/genotypes could be used to support the improvement of the egg production capacity in the breeding of Lien Minh chicken.

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JONES, FRANK T., DAVID V. RIVES e JOHN B. CAREY. "Salmonella Contamination in Commercial Eggs and an Egg Production Facility". Poultry Science 74, n. 4 (aprile 1995): 753–57. http://dx.doi.org/10.3382/ps.0740753.

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Pavlovski, Z., Z. Skrbic e M. Lukic. "Table eggs of known origin and guaranteed quality: Brand egg". Biotehnologija u stocarstvu 23, n. 5-6-1 (2007): 485–95. http://dx.doi.org/10.2298/bah0701485p.

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The fact that most of consumers according to polls and questionnaires in our country, value the most freshness of eggs, and that at the same time they are not satisfied with it, there is necessity to provide guaranteed fresh eggs of high quality. Similar situation in other countries and cities in Serbia has induced some of producers of table eggs to develop production programs and marketing of eggs of known origin and guaranteed quality. Table eggs are produced and sold according to demands of consumers with integrated control system based on two EU Directives (No 1907/90 and No 1274/91). Program contains several components (defining of brand, production, quality control, commercial advertising) and each of the components is of conceptual importance, integral part and as such cannot be left out or neglected. In general, product of such Program cannot be only brand egg but result of entire integrated system of production, sale, quality control, marketing, and represent links in the chain - from producer of eggs to consumer.

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Widiyaningrum, P., L. Lisdiana e N. R. Utami. "EGG PRODUCTION AND HATCHABILITY OF LOCAL DUCKS UNDER SEMI INTENSIVE VS EXTENSIVE MANAGEMENTS". Journal of the Indonesian Tropical Animal Agriculture 41, n. 2 (1 luglio 2016): 77–82. http://dx.doi.org/10.14710/jitaa.41.2.77-82.

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The study aimed to compare the egg production and hatchability of local ducks under different management systems, namely semi-intensive and extensive. The research conducted was an experimental one-way classification withtwo treatments.Each treatment used 15 male and 120 females (mating ratio 1:8), and ducks aged 13-14 months. Eggs production was recorded during three weeks period. About300 eggs were selected from each treatment to be hatched. Fertility was observedat 4th days of hatching process using egg candler. Data of eggs production, eggs weight, fertility,and hatchability were analyzed using unpaired two sample Student’s t-test. The results showed that average of egg weight, fertility and hatchability were notdifferent under two managementsystem, but egg production in the semi-intensive maintenance was significantly higher (P<0.05) thanthose inthe extensive system.Egg production in the semi-intensivewas 12.3% higher than those in the extensive.In conclusion, the semi-intensive system that is applied in this study the number of eggs production but did not affect the average of egg weight, fertility and hatchability.

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Perić, Lidija, Mirjana Đukić Stojčić e Siniša Bjedov. "Effect of Production Systems on Quality and Chemical Composition of Table Eggs". Contemporary Agriculture 65, n. 3-4 (1 dicembre 2016): 27–31. http://dx.doi.org/10.1515/contagri-2016-0014.

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SummaryProduction system is one of the most important factors which have an effect on egg quality. In recent years consumers have paid more attention to the housing system in which eggs are produced with a significant increase of their interest in organic and functional food. Some consumers perceive omega-3 enriched eggs and free range eggs as beneficial for their health. Therefore, the aim of this work was to determine the chemical composition and the internal and external quality of eggs produced in conventional cages, free range systems and of omega-3 enriched eggs. Samples of 30 eggs from three different production systems were taken from the market. For eggs from each system the internal and external egg quality traits were examined as well as the protein and fat content. The results showed lower fat content in eggs from cages (P<0.05). Free range and omega-3 eggs had higher content of protein in egg white compared to the conventional ones (P<0.05). Production system significantly influenced the shell breaking strength, Haugh units and yolk color. The shell breaking force was significantly higher in free range eggs (P<0.05). The highest value of Haugh units was found in free range eggs and the lowest in omega-3 enriched eggs. The results of this work confirmed that there are differences in quality and the chemical composition of eggs from different production systems.

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Berrang, M. E., J. F. Frank, R. J. Buhr, J. S. Bailey, N. A. Cox e J. M. Mauldin. "Microbiology of Sanitized Broiler Hatching Eggs Through the Egg Production Period". Journal of Applied Poultry Research 6, n. 3 (ottobre 1997): 298–305. http://dx.doi.org/10.1093/japr/6.3.298.

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Chekh, Oleksandr, Olga Bordunova, Vadym Chivanov, Evgenia Yadgorova e Larisa Bondarchuk. "Nanocomposite coatings for hatching eggs and table eggs". Open Agriculture 6, n. 1 (1 gennaio 2021): 573–86. http://dx.doi.org/10.1515/opag-2021-0046.

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Abstract Theoretical and applied aspects of the concept of using biomimetic protective coatings GREEN ARTICLE (ARTIficial cutiCLE) in the poultry industry, namely in the production of table and hatching eggs, are developed. The basic matrix component of the protective coatings GREEN ARTICLE is chitosan, an environmentally friendly, inexpensive, and harmless material. It is experimentally proved that electrochemical and ultrasonic technologies for modifying a solution of chitosan in peroxide compounds (peracetic acid and hydrogen peroxide) with nanoparticles of oxides like titanium, iron, zinc, and metals, such as titanium, copper, and calcite, allow to create protective coatings of double action in accordance with the technologies: (a) extending the shelf life of table eggs, food green article (FGA) and (b) preventing contamination of hatching eggs with pathogenic microflora, increasing the hatchability of eggs, and the quality of chicken, hatching green article (HGA). In the technology of storing table eggs, artificial cuticles based on chitosan FGA are characterized by the following characteristics: increased thickness of 6–10 µm, low gas and moisture permeability, and high biocidal activity against pathogenic bacteria and viruses. It is shown that the use of FGA technology in the production of table eggs can extend the period of transportation and storage of products by 33–35 days at a temperature of 24°C and maintained a grade A (Haugh unit = 71–60) through the entire 35 days period. The technology HGA reduces the rate of contamination of hatching eggs with pathogenic microflora by 99.29–99.7%, while increasing the egg hatching rate by 2.3–11.6% compared to the control, depending on the cross of the poultry and the storage conditions of the hatching eggs. It is important that these technologies have a great prospect for application in countries that develop green technologies for the production of poultry products.

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Più fonti

Tesi sul tema "Eggs Production"

Nelwamondo, Nditsheni Constance. "Effect of management and socio-economic factors on the performance of the Vhembe District Egg Production Project". Thesis, University of Limpopo, Turfloop Campus, 2013. http://hdl.handle.net/10386/1115.

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Thesis (MA.Agricultural Management (Animal Production)) -- University of Limpopo, 2013
The objectives of the study were to evaluate the productivity of the Vhembe egg production project and determine the management and socio-economic factors affecting productivity. The data were collected from 2005 to 2007. Thirty-two farmers from four municipalities were randomly selected. Each household received a once-off unit consisting of a cage with eighteen point of lay chickens 4x50 bags of laying mesh, feeding and drinking troughs. Production records from sampled farmers were used in the analysis. Data included monthly egg production, eggs consumed, eggs sold, income from eggs, production costs, monthly feed utilization and mortality. Primary data on educational standards, socio-economic characteristics (age and gender of the household head, farming size, level of education and alternative income, were collected using a questionnaire. The study revealed that sex, age and educational level had impact on production as low production was associated with older farmers and low level of education. These factors should be considered when planning community projects. Chicken rearing and ownership is often shared among the family members, in this study, the management was predominantly by women (63%) and children (18%). This may be an indication that if assistance efforts are targeted towards women, village poverty could be significantly reduced. It is concluded that the low income accrued from the project explains the reason for high abandonment or neglect of the project. The income received from the project is smaller than the government grants and as such not attractive. It is not surprising that presently most farmers have abandoned the project. It is noted that if labour costs had been taken into consideration, the project would be running at a serious loss and the resultant output would discourage even the most enthusiastic farmers.

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Hartmann, Camilla. "Selection for yolk production in laying hens /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5807-2.pdf.

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Portilla, Enrique. "Improving egg production estimates for mackerel and horse mackerel using multi-stages eggs". Thesis, University of Strathclyde, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425954.

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Amini, Keyvan. "Strategies for improving fatty acid profile of eggs for production of omega-3 enriched eggs". Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100759.

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Two experiments were carried out to evaluate the effects of Pearl Millet in combination with different levels of flaxseed and natural pigment (Oro Glo 15RTM) on quantity of n-3 fatty acids in eggs, laying performance and yolk pigmentation. In the first experiment, six different diet treatments were used for six weeks, with 24 hens per treatment (three birds per cage, eight cage replicates). Control diet was a corn-soybean meal diet, and diets containing 0, 2, 4, 8 or 12% ground flaxseed in which all the corn was replaced by pearl millet. In the second experiment, the diet treatments consisted of pearl millet and three inclusion levels of ground flaxseed (4%, 6% and 8%) and two levels (0.1% and 0.2%) of natural pigment in a factorial arrangement. The experiment lasted for twelve weeks, with 18 hens per treatment (three birds per cage, six cage replicates). In each of the experiments, all the diets were formulated to be isocaloric and isonitrogenous and to meet or exceed NRC requirements. Body weight of the birds and feed consumption were recorded at weekly (first experiment) and biweekly (second experiment) intervals. Number of eggs and egg mass produced were measured and recorded on a daily basis. At the end of each of the experiments, all the hens were euthanized to determine liver integrity. In both of the experiments, flock performance parameters were not different among treatments. In regard to egg traits, in the second experiment after 8 week of the start of the experiment, birds fed with diets containing 8% flaxseed produced significantly ( P < 0.05) smaller eggs compared to hens fed 4% flaxseed. Yolk pigmentation was lower (P < 0.05) for the eggs produced by hens fed diets containing pearl millet compared with those produced by feeding corn-based diet. However, 0.1% or 0.2% inclusion of the pigment both proved to be suitable to restore yolk pigmentation to marketable levels. No difference was observed among diets in regard to liver haemorrhage. Evaluation of FA profiles indicated that birds fed a diet containing PM as the sole grain source, and low levels of flaxseed (6%) can produce eggs with more than 350 mg/egg of n-3 FA, which is the lower standard to market eggs as "n-3 FA enriched".
Keywords: laying hens, pearl millet, flaxseed, natural pigment, flock performance, eggs, liver haemorrhage.

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Edin, Malin. "Miljöpåverkan av äggproduktion : En jämförelse mellan Lilluns ägg och andra svenska äggproducenter". Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-105590.

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The purpose of this report was to compare Lilluns egg production with other Swedish egg producers based on the flow of nutrients (nitrogen, phosphorus and potassium) in the egg production systems. The main focus in the report was the utilization rate of the forage and the excess of nutrients per kg egg. Additionally, the purpose was to identify the environmental impact from Lilluns egg production and compare the results with other egg producers. The inflow of nutrients associated with forage and poultry was compared with the nutrients that were exported from the production. All of the egg producers in this study had an excess of nutrients. The utilization rate of the forage for Lilluns egg was 47 %, the other egg producers in this study had an utilization rate between 45-50 %. The results showed that Lilluns egg had an excess of nitrogen of 0,04 kg/kg eggs. Lilluns egg also had an excess of phosphorus and potassium. The excess of phosphorus was 0,01 kg/kg eggs and 0,013 kg/kg eggs for potassium. The results showed that all the egg producers in this study had an excess of all the nutrients. The conclusion is that the egg production systems in this study have a similar utilization rate and the excess of nutrients per kg egg was also similar for all the egg producers.

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Segura, José Candelario. "An investigation of male traits as tools to improve egg production in chickens /". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=72762.

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Wall, Helena. "Laying hens in furnished cages : use of facilities, exterior egg quality and bird health /". Uppsala : Department of Animal Nutrition and Management, Swedish Univ. of Agricultultural Sciences, 2003. http://epsilon.slu.se/a406.pdf.

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Pelícia, Kleber [UNESP]. "Efeito dos níveis de cálcio, fósforo e granulometria de calcário na dieta de poedeiras comerciais no primeiro e segundo ciclo de produção". Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/104113.

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Made available in DSpace on 2014-06-11T19:32:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-08-05Bitstream added on 2014-06-13T19:43:51Z : No. of bitstreams: 1 pelicia_k_dr_botfmvz.pdf: 374037 bytes, checksum: b680d9b7127562753fb9bb889bfcf807 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Universidade Estadual Paulista (UNESP)
O experimento teve por objetivo estudar o efeito de níveis de cálcio e da granulometria do calcário sobre o desempenho, qualidade de ovos e teor de cálcio no sangue e fezes de poedeiras semipesadas. As aves foram distribuídas em um delineamento fatorial inteiramente casualisado (3x4) com 12 tratamentos com quatro níveis de cálcio (3,0; 3,5; 4,0 e 4,5 %) e três composições granulmétricas do calcário: 100 % fino (0,18 mm); 50 % fino (0,18 mm) e 50 % grosso (3,13 mm) e 30 % fino (0,18 mm) e 70 % grosso (3,13 mm), seis repetições de oito aves por unidade experimental da linhagem Hisex Brown® de 59 a 70 semanas de idade. Não se observaram diferenças entre os tratamentos nem interações entre os fatores para percentagem postura, peso médio dos ovos, massa de ovos, consumo de ração conversão alimentar por dúzia e por quilograma de ovos produzidos, percentagem de ovos quebrados, percentagem de ovos inteiros, gravidade específica, espessura de casca, percentagem de casca, peso da casca por superfície de área, percentagem de gema, coloração da gema, % de albume, unidade Haugh e quantidade de cálcio no sangue. Observou-se efeito quadrático da composição granulométrica de calcário para percentagem de ovos defeituosos, com menor percentagem de ovos defeituosos usando composições granulométricas do calcário formado de 61,75 % de calcário de granulometria fina e 38,25 % de calcário de granulometria grossa. Houve efeito linear da equação de regressão do nível de cálcio da dieta para peso da casca por superfície de área e cálcio nas fezes onde a elevação no nível cálcio dietético aumentou o peso da casca por superfície de área e a percentagem de cálcio excretado. Conclui-se que a combinação do maior nível de cálcio (4,5%) na dieta com substituição do calcário fino pelo grosso em 38 % na alimentação de poedeiras...
The experiment was randomized with the objective to study the effect of the calcium levels and the limestone particle size on the performance, eggs quality and content of calcium in the blood and excrements in Brown laying hens. The birds had been distributed in an factorial delineation entirely randomized (3X4) with 12 treatments with four calcium levels (3.0, 3.5, 4.0 and 4.5 %) and three limestone particicle size compositions: 100 % thin (0.18 mm); 50 % thin (0.18 mm) and 50 % coarse (3.13 mm) and 30% thin (0.18 mm) and 70 % coarse (3.13 mm), six repetitions for treatment and eight birds for experimental unit of the Hisex Brown® lineage of 59 the 70 weeks of age. There were no differences (p>.05) for the treatments and nor significant interaction between the factors for posture percentage, average weight egg, egg mass produced, feed intake, feed conversion for dozen and kilogram of produced eggs, broken egg percentage, perfect egg percentage, specific gravity, shell thickness, eggshell and eight birds for experimental unit of the Hisex Brown® lineage of 59 the 70 weeks of age. There were no differences (p>.05) for the treatments and nor significant interaction between the factors for posture percentage, average weight egg, egg mass produced, feed intake, feed conversion for dozen and kilogram of produced eggs, broken... (Complete abstract click electronic access below)

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Reed, Shawna Eileen. "Estimation of genetic parameters of egg production in Single Comb White Leghorn chickens developed from a straincross". Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24903.

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In 1957, strains 3 and 4, two highly selected but unrelated strains of Single Comb White Leghorn chickens from Agriculture Canada's Animal Research Station at Ottawa were crossed to establish the Agassiz strain (strain 6). Further selection was imposed on strain 6 for improvements in hen-housed egg production (HHEP) based on part-records to 273 days and maintenance of egg weight, fertility, hatchability and viability. Data from 1957 to 1963 were analysed utilizing the SAS programs. There were no significant improvements in performance for HHEP, but egg weight, fertility, hatchability and viability were maintained. The lack of response to selection for HHEP was probably due to the following reasons: 1) too many traits were considered in the selection program at the same time, 2) negative genetic correlations existed among the selected traits, 3) strict adherence to a selection scheme was not practiced, 4) most of the traits under selection had low heritabilities, 5) the duration of the study was not long enough, and 6) the population size of strain 6 may not have been large enough. There was a significant decrease in body weight at 365 days (-4.33 ± 0.48, p < 0.0009). This decrease may be because of selection within full-sibs for more refined birds with better conformation as parents of the next generation. There were significant decreases in egg specific gravity at 225 and 450 days, and in Haugh units at 225 days, although Haugh units were increasing when measured at 450 days. The mean h²s for HHEP was 0.45, and the mean h²s for egg production to 273 days was 0.20 and the mean h²d for the same trait was 0.33. The mean h²s and h²d estimates for egg weight at 225 days were 0.60 and 0.50, respectively. The mean h²s and h²d for age at sexual maturity were 0.22 and 0.33, respectively, and those for body weight at 365 days were 0.53 and 0.62, respectively. The mean h²s and h²d for egg specific gravity at 225 were 0.64 and 0.33, respectively while those for Haugh units at 225 days were 0.57 and 0.68, respectively. These estimates were consistent with those found in the literature. The sctual selection differentials showed that selection was positive for egg production, while those for egg weight at 225 days were zero, and those for body weight at 365 days showed that selection was in the downward direction on the sires.
Land and Food Systems, Faculty of
Graduate

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Rana, Kausik J. "Parental influences on egg quality, fry production and fry performance in Oreochromis niloticus (Linnaeus) and O. mossambicus (Peters)". Thesis, University of Stirling, 1986. http://hdl.handle.net/1893/11926.

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Reproductive traits, age of female broodfish and aspects of parental behaviour influencing the production and quality of fry in the mouthbrooding tilapia species Oreochromis niloticus and O. mossambicus were investigated. Two incubation containers (conical and round-bottomed) and rearing temperature were first studied to ascertain their effects on egg and fry performance. Partial agitation of eggs in round-bottomed containers significantly (P < 0.05) improved hatchability and success rate of fry production, by 17% and 25%, respectively, compared with conical containers. For the temperature trials only O. niloticus were studied. Two egg acclimation conditions were tested; these influenced the temperature range of hatching, hatching success and the upper and lower median temperature tolerance limits of artificially reared eggs. Thermal tolerance of eggs and fry decreased with progressive development and optimum (> 90%) survival and growth of swim-up fry occurred at 28°-3QoC. Hatching times were inversely related to temperature (P < 0.01) and rates of development to hatching were best described by a curvilinear relationship (P < 0.01). Growth rates, gross yolk utilization efficiency to maximum body weight, age at maximal body weight, onset of exogenous feeding and 50% irreversible starvation (point-of-no- return, PNR) were temperature-dependent. At 24•, 28' and 30' c (xi) maximum body weight occurred on days 18, 9 and 6 post-hatching, respectively, four days earlier than fry at 24' C. Similarly, PNR occurred on days 23, 20 and 18 at 24•, 28• and 30•C, respectively. Reproductive traits of 0+, 1+ and 2+ age-classes of broodfish were investigated. In O. niloticus mean dry egg weight and clutch weight were significantly (P < 0.05) different between all three age-classes, and yearlings produced the smallest eggs, whereas for total and relative fecundity only yearling females were significantly (P < o. 05) different to older broodfish. In both species broodfish age-class had no effect (P > 0.05) on egg:body weight ratio. In both species all reproductive traits were significantly related (P< 0.01) to female age, length and weight. The strongest influences were maternal age on egg size and maternal length and weight on total fecundity and clutch weight. The influence of maternal age and hence egg size on hatching time, and growth, survival, onset of feeding and PNR of fry developing solely on their yolk reserves was investigated. Larger eggs produced longer (P < 0.001) and heavier (P < 0.001) fry which sustained starvation stress longer (P < 0.001). Initial advantages of egg size on growth persisted through to 60 days post-hatching (P <0.05). Feeding success was improved by using of yearlings. For fry from fry from 1+ and 2+ females instead 0+, 1+ and 2+ O. niloticus and O. mossambicus females, PNR was reached on days 9, 12 and 12, and 12, 15 and 18, respectively. Delaying initial feeding beyond six days post-hatching significantly (P < 0.05) reduced the growth of fry. (xii ) Overall survival (between 6-20 days post-hatching) was improved by using older females. The effects of parental breeding behaviour on fry production and quality were investigated. Egg fertilizing capacity of males was inversely related to their number of spawnings in a day. During oral rearing cumulative fry damage increased linearly during the first eight days after spawning and plateaued at 25%-29%. Possible reasons for fry damage are discussed. Naturally reared fry were lighter (P < 0.05) than artificially reared 'siblings'. The implications of broodfish age and size and parental breeding behaviour for mass production of high quality tilapia fry and the need, advantages and feasibility of artificially rearing Oreochromis eggs and fry are discussed.

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Più fonti

Libri sul tema "Eggs Production"

San-ming, Wang. Silkworm egg production. Rome: Food and Agriculture Organization of the United Nations, 1989.

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San-ming, Wang. Silkworm egg production: Volume III. Rome: Food and Agriculture Organization of the United Nations, 1989.

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C, Wilson Graham, a cura di. Optimum egg quality: A practical approach. Sheffield(Great Britain): 5M Publishing, 2007.

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Ross, Carlyle. An economic analysis of hatching egg production in Alberta. [Edmonton?]: Alberta Agriculture, Economic Services Division. Production Economics Branch, 1991.

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Food and Agriculture Organization of the United Nations., a cura di. Egg marketing: A guide for the production and sale of eggs. Rome: Food and Agriculture Organization of the United Nations, 2003.

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Producing dairy and eggs. London: Raintree, 2013.

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Service, Game Conservancy Advisory. Egg production and incubation. Fordingbridge: Game Conservancy, 1993.

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Service, Game Conservancy Advisory. Egg production and incubation. Fordingbridge: Game Conservancy, 1993.

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Roberts, Deborah. The economics of egg production: 1992. Manchester: University of Manchester Faculty of Economic and Social Studies, 1993.

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Parkhurst, Carmen R. Poultry meat and egg production. New York: Van Nostrand Reinhold Co., 1988.

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Capitoli di libri sul tema "Eggs Production"

Zeidler, Gideon. "Further-Processing Eggs and Egg Products". In Commercial Chicken Meat and Egg Production, 1163–97. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0811-3_59.

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Syduzzaman, Md, e Alin Khaliduzzaman. "Grading of Hatching Eggs". In Informatics in Poultry Production, 53–75. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2556-6_4.

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Tay, Amanda J., Jose C. Yong e Norman P. Li. "Production of Eggs and Sperm". In Encyclopedia of Evolutionary Psychological Science, 1–5. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-16999-6_1991-1.

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Tay, Amanda J., Jose C. Yong e Norman P. Li. "Production of Eggs and Sperm". In Encyclopedia of Evolutionary Psychological Science, 6305–9. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-19650-3_1991.

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Zeidler, Gideon. "Processing and Packaging Shell Eggs". In Commercial Chicken Meat and Egg Production, 1129–61. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0811-3_58.

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Cyriac, Stella, e Leo Joseph. "Incubation and Hatching of Duck Eggs". In Duck Production and Management Strategies, 339–83. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6100-6_9.

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Zeidler, Gideon. "Shell Eggs and Their Nutritional Value". In Commercial Chicken Meat and Egg Production, 1109–28. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0811-3_57.

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Baéza, Elisabeth, e Jeng-Fang Huang. "Nutritive Value of Duck Meat and Eggs". In Duck Production and Management Strategies, 385–402. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6100-6_10.

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Aboonajmi, Mohammad, e Zohre Mostafaei. "Non-destructive Quality Assessment of Table Eggs for Online Sorting". In Informatics in Poultry Production, 35–51. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-2556-6_3.

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Surai, P. F., e V. I. Fisinin. "8. Natural multi-nutrient enriched eggs: production and role in health". In Handbook of eggs in human function, 133–52. The Netherlands: Wageningen Academic Publishers, 2015. http://dx.doi.org/10.3920/978-90-8686-804-9_8.

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Atti di convegni sul tema "Eggs Production"

Cerina, Sallija, e Liga Proskina. "Pea seeds and alfalfa hay pellets: to increase the economic return of poultry farms". In 23rd International Scientific Conference. “Economic Science for Rural Development 2022”. Latvia University of Life Sciences and Technologies. Faculty of Economics and Social Development, 2022. http://dx.doi.org/10.22616/esrd.2022.56.008.

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The output of poultry products by poultry enterprises in the world was mainly determined by feeding techniques and poultry productivity. The productivity of poultry is characterised by the rate of egg-laying or the number of eggs produced per hen a year and affected by the availability and diversity of feed materials (especially protein). In recent years, researchers have focused on legumes of various species as promising sources of protein for livestock production, such as beans, peas, lupine, alfalfa etc.; therefore, in Latvia more attention is paid to the production of protein crops or legumes. The aim of the research was to identify the impact of domestically sourced legume seeds included in diets for laying hens on the economic performance of egg production. Two kinds of protein crops were examined by the research: peas `Bruno` and dried alfalfa pellets. Feeding laying hens with peas or dried alfalfa pellets made it possible to produce eggs with a heavier weight (55.28-67.07%), which in turn makes it possible to increase revenues (10.3-12.9%) from the sales of eggs with the same feed consumption.

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Stefanova, I. L., L. V. Shakhnazarova e A. Yu Klimenkova. "Technology development for eggs and egg components further processing and it introduction to industry". In SCIENTIFIC AND TECHNICAL SUPPORT EFFICIENCY AND QUALITY PRODUCTION OF AGRICULTURAL PRODUCTS. VNIIPP, 2019. http://dx.doi.org/10.30975/978-5-9909889-2-7-2019-1-1-246-257.

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Marta Dos Santos Baracho, Fabiana Gonçalves Lima, Irenilza Alencar Nääs e Juliano Araújo Cassiano. "Losses in Hatchery Eggs Production: Multivariate Data Analysis". In 2012 IX International Livestock Environment Symposium (ILES IX). St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2012. http://dx.doi.org/10.13031/2013.41645.

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"Quality of eggs in organic and conventional production system". In 2016 ASABE International Meeting. American Society of Agricultural and Biological Engineers, 2016. http://dx.doi.org/10.13031/aim.20162461777.

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Rakonjac, Simeon, Snežana Bogosavljevic-Boškovic, Vladimir Doskovic, Miloš Lukic, Zdneka Škrbic, Veselin Petricevic e Milun D. Petrovic. "KVALITET JAJA ORGANSKIH KOKOŠI NOSILJA U RAZLIČITIM FAZAMA PROIZVODNOG CIKLUSA". In XXVI savetovanje o biotehnologiji sa međunarodnim učešćem. University of Kragujevac, Faculty of Agronomy, 2021. http://dx.doi.org/10.46793/sbt26.245r.

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The aim of this study was to determine the eggs and eggshell quality of organic laying hens at different stages of the one-year production cycle. Based on the results of these studies, it can be concluded that the organic eggs of 24-week-old Isa Brown layers had lower weight and a higher shape index than the eggs of 48- and 72-week-old hens. On the other hand, the eggs of 24- and 48-week-old laying hens had a higher albumen height and Haugh units, and less colored yolks compared to the eggs of 72-week-old hens. In terms of eggshell quality, 24-week-old hen eggs had a higher proportion, thickness and breaking strength and less shell deformation compared to 48- and 72-week-old hen eggs.

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Khamitova, V. Z., А. К. Osmanyan e V. V. Malorodov. "Incubation potency in dependence on meat hen eggs storage time". In SCIENTIFIC AND TECHNICAL SUPPORT EFFICIENCY AND QUALITY PRODUCTION OF AGRICULTURAL PRODUCTS. VNIIPP, 2019. http://dx.doi.org/10.30975/978-5-9909889-2-7-2019-1-1-287-291.

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MALOKU, Sadik, Isuf LUSHI, Zekria LOKA e Maksim Meço. "The costs of breeding in laying hens and eggs’ production in Kosovo". In The 5th International Virtual Conference on Advanced Scientific Results. Publishing Society, 2017. http://dx.doi.org/10.18638/scieconf.2017.5.1.404.

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Rakonjac, Simeon, Snežana Bogosavljević-Bošković, Vladimir Dosković, Miloš Lukić, Zdenka Škrbić, Veselin Petričević e Milun D. Petrović. "UTICAJ SISTEMA GAJENJA I GENOTIPA KOKOŠI NOSILJA NA SADRŽAJ HOLESTEROLA U JAJIMA". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.213r.

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The aim of this study was to determine the effect of the rearing system (floor and organic) and the genotype of laying hens (Isa Brown hybrid and New Hampshire breed) on the cholesterol content in eggs. On seven occasions during the one-year production cycle (24, 32, 40, 48, 56, 64 and 72 weeks hen's age), 15 eggs from all four experimental groups were taken, and cholesterol content was determined on pooled samples. Based on the obtained results, it can be concluded that laying hens from the floor rearing system had lower cholesterol content in eggs compared to organic, while the effect of genotype on this trait cannot be defined with certainty.

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Zulkarnain, Deki, Andi Murlina Tasse, Ali Bain, Nur Hasnawati, Nur Santy Asminaya e La Ode Muh Munadi. "Physical Quality of Laying Hen Eggs Given Manihot esculenta Leaf Extract". In International Conference on Improving Tropical Animal Production for Food Security (ITAPS 2021). Paris, France: Atlantis Press, 2022. http://dx.doi.org/10.2991/absr.k.220309.051.

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Golub, Gennadii, Oleh Marus, Yaroslav Yarosh e Natalja Karpiuk. "Comparative evaluation of methods for separating grain moth eggs in production of trichograms". In 20th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering, 2021. http://dx.doi.org/10.22616/erdev.2021.20.tf208.

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Rapporti di organizzazioni sul tema "Eggs Production"

van Horne, P. L. M., e N. Bondt. Competitiveness of the EU egg sector, base year 2021 : international comparison of production costs of eggs and egg products. Wageningen: Wageningen Economic Research, 2023. http://dx.doi.org/10.18174/583668.

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Sun, Hongyu, Eun Joo Lee, Himali Samaraweera, Michael E. Persia e Dong U. Ahn. Effects of Increasing Concentrations of Corn Dried Distiller’s Grains with Solubles on the Egg Production and Internal Quality of Eggs. Ames (Iowa): Iowa State University, gennaio 2014. http://dx.doi.org/10.31274/ans_air-180814-1183.

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Bright, Ashleigh Bright. Egg producer and egg buyer disconnect: Exploring barriers and levers to increase cage-free egg production in China. Tiny Beam Fund, dicembre 2022. http://dx.doi.org/10.15868/socialsector.41288.

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Brice, Jeremy. Investment, power and protein in sub-Saharan Africa. A cura di Tara Garnett. TABLE, ottobre 2022. http://dx.doi.org/10.56661/d8817170.

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The place of protein in sub-Saharan Africa’s food system is changing rapidly, raising complex international development, global health and environmental sustainability issues. Despite substantial growth in the region’s livestock agriculture sector, protein consumption per capita remains low, and high levels of undernourishment persist. Meanwhile sub-Saharan Africa’s population is growing and urbanising rapidly, creating expectations that demand for protein will increase rapidly over the coming decades and triggering calls for further investment in the expansion and intensification of the region’s meat and dairy sector. However, growing disquiet over the environmental impacts of further expansion in livestock numbers, and growing sales of alternative protein products in the Global North, has raised questions about the future place of plant-based, insect and lab-grown proteins in African diets and food systems. This report examines financial investment in protein production in sub-Saharan Africa. It begins from the position that investors play an important role in shaping the development of diets and food systems because they are able to mobilise the financial resources required to develop new protein products, infrastructures and value chains, or to prevent their development by withholding investment. It therefore investigates which actors are financing the production in sub-Saharan Africa of: a) animal proteins such as meat, fish, eggs and dairy products; b) ‘protein crops’ such as beans, pulses and legumes; and c) processed ‘alternative proteins’ derived from plants, insects, microbes or animal cells grown in a tissue culture. Through analysing investment by state, philanthropic and private sector organisations – as well as multilateral financial institutions such as development banks – it aims to establish which protein sources and stages of the value chain are financed by different groups of investors and to explore the values and goals which shape their investment decisions. To this end, the report examines four questions: 1. Who is currently investing in protein production in sub-Saharan Africa? 2. What goals do these investors aim to achieve (or what sort of future do they seek to bring about) through making these investments? 3. Which protein sources and protein production systems do they finance? 4. What theory of change links their investment strategy to these goals? In addressing these questions, this report explores what sorts of protein production and provisioning systems different investor groups might be helping to bring into being in sub-Saharan Africa. It also considers what alternative possibilities might be marginalised due to a lack of investment. It thus seeks to understand whose priorities, preferences and visions for the future of food might be informing the changing place of protein in the region’s diets, economies and food systems.

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Hartcher, Kate Hartcher. Supporting High Welfare Cage-Free Egg Production in China. Tiny Beam Fund, aprile 2020. http://dx.doi.org/10.15868/socialsector.36545.

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El Halawani, Mohamed, e Israel Rozenboim. Temperature Stress and Turkey Reproduction. United States Department of Agriculture, maggio 2002. http://dx.doi.org/10.32747/2002.7570546.bard.

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High temperature stress is of major concern to turkey producers in Israel and the United States. The decline in the rate of egg production at high environmental temperature is well recognized, but the neuroendocrinological basis is not understood. Our objectives were: 1) to characterize the hypothalamo-hypophyseal axis involvement in the mechanism(s) underlying the detrimental effect of heat stress on reproduction, and 2) to establish procedures that alleviate the damaging effect of heat stress on reproduction. Heat stress (40oC, Israel; 32oC, U.S.) caused significant reduction in egg production, which was restored by VIP immunoneutralization. The decline in egg production did not appear to be entirely related to the expression of incubation behavior due to the rise in circulating PRL in stressed birds. Heat stress was found to increase circulating PRL in ovariectomized turkeys independent of the reproductive stage. Active immunization against VIP was shown for the first time to up-regulate LHb and FSHb subunit mRNA contents. These findings taken together with the results that the heat stress-induced decline in egg production may not be dependent upon the reproductive stage, lead to the suggestion that the detrimental effect of heat stress on reproductive performance may be in part mediated by VIP acting directly on the GnRH/gonadotropin system. Inhibin (INH) immunoneutralization has been shown to enhance FSH secretion and induces ovulation in mammals. It is hypothesized that immunization of heat-stressed turkeys against INH will increase levels of circulating FSH and the number of preovulating follicles which leads to improved reproductive performance. We have cloned and expressed turkey INH-a and INH-bA. Active immunization of turkey hens with rtINH-a increased pituitary FSH-b subunit mRNA and the number of non-graded preovulatory yellow follicles, but no significant increase in egg production was observed.

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Wolc, Anna, Jesus Arango, Petek Settar, Neil P. O'Sullivan e Jack C. M. Dekkers. Evaluation of Egg Production in Layers Using Random Regression Models. Ames (Iowa): Iowa State University, gennaio 2011. http://dx.doi.org/10.31274/ans_air-180814-774.

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van der Fels-Klerx, H. J., E. D. van Asselt, M. Pikkemaat, R. Hoogenboom, S. P. J. van Leeuwen, P. van Horne, P. E. Boon, L. Razenberg, M. Mengelers e F. Leenstra. Chemical amd physical hazards in the egg production chain in the Netherlands. Wageningen: RIKILT Wageningen University & Research, 2017. http://dx.doi.org/10.18174/387371.

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van Horne, P. L. M. Competitiveness the EU egg sector, base year 2017 : international comparison of production costs. Wageningen: Wageningen Economic Research, 2019. http://dx.doi.org/10.18174/469616.

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van Horne, P. L. M., e N. Bondt. Competitiveness of the EU egg sector, base year 2015 : international comparison of production costs. Wageningen: Wageningen Economic Research, 2017. http://dx.doi.org/10.18174/417151.

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