Letteratura scientifica selezionata sul tema "Geometridae Feeding and feeds"
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Articoli di riviste sul tema "Geometridae Feeding and feeds"
1
Staude, Hermann S., Marion Maclean, Silvia Mecenero, Rudolph J. Pretorius, Rolf G. Oberprieler, Simon An Noort, Allison Sharp et al. "Geometroidea: Geometridae: Geometrinae, Larentiinae, Sterrhinae; Uraniidae". Metamorphosis 31, n. 3 (21 marzo 2022): 125–43. http://dx.doi.org/10.4314/met.v31i3.8.
Testo completoAbstract (sommario):
EXPLANATION OF THE MASTER LISTSThere are 28 master lists, grouped as convenient taxon groups and split in such a way as to make each list individually downloadable but form an integral part of the main article. Citations to these master lists should be as indicated for the main article. Each master list contains a table that is made up of eight columns and each row represents information on one rearing record. For each master list, the rearing records are ordered under family, subfamily and sometimes tribe headings (in some cases we offer a superfamily instead of a family name where we were uncertain of the family placement). The records are ordered by family, subfamily, species and then rearer name. Explanation of the information contained in each column is as follows:Ref. no. This column contains references to a unique rearing number that links the notes, photographs and reared specimens gathered during the course of the rearing. A blank field indicate that there was no reference number submitted.Lepidoptera species. This column contains the best identification that could be made of the Lepidoptera taxon at the time of publication given the resources available. The name of the taxon specialist who identified the species (if not an author) is given in brackets. A blank cell means that we were unable to identify the taxon with some certainty.Host species (Family). This columns contain the best identifications that could be made of the host species, on which the caterpillar was feeding, at the time of publication given the resources available. A blank cell means that we were unable to identify the plant species to that level with some certainty or that feeding by the caterpillar was not confirmed. In the majority of cases the host indicated is the host on which the life stage was collected in the wild and on which the caterpillar fed subsequently. In cases where the host was presented to the larva in captivity, this is indicated. Where relevant, the name of the determiner is given in brackets. The host family name is given at the end in brackets. The phrase “reared ab ovum” means that the pictured larva was reared from the egg, meaning that the entire life-history of the species (all larval instars) was recorded and documented. In most cases such larvae were reared from eggs laid by a female moth collected at a light but raised on a natural host-plant of the species (though not necessarily one occurring at the locality where the female was taken), in some cases such larvae were reared from eggs found laid on a host-plant in the wild, and in a few cases the larvae were reared on an unnatural (exotic) host-plant in captivity. Such imprecisions regarding host use are, however, also contained in records of field-collected larvae, as mature larvae sometimes feed on plants they will not take in the early instars but do switch to at a later stage, and many also naturally feed on exotic plants in the wild.Locality. This column contains a short standardised reference to the locality where the specimen used in the rearing was collected, be it any life stage or a female from which eggs were obtained. The locality field lists, in order, the locality description, followed by the closest town, province (where relevant) and then country.Date of collection (c), pupation (p), emergence (e). This column contains the dates as indicated, where available. Missing dates are indicated by a “?”.Rearer. This column contains the name(s) of the person(s) who conducted the rearing, who may or may not have been the person who collected the rearing material.Final instar larva. This column contains the photographs of the caterpillar of the species reared. In most cases they depict the final-instar larva and at the time it was still feeding, but in some cases they show the larva in the pre-pupation phase (usually on the ground) and in a few cases an earlier instar, where for some reason a photograph of the final instar was unavailable.Adult. This column contains photographs of the actual adult specimen reared from the caterpillar shown in the previous column. Photographs marked with * are not of the actual adult specimen which emerged from the imaged larva.
2
Staude, Hermann S., Marion Maclean, Silvia Mecenero, Rudolph J. Pretorius, Rolf G. Oberprieler, Simon Van Noort, Allison Sharp et al. "Geometroidea: Geometridae: Ennominae (2)". Metamorphosis 31, n. 3 (17 marzo 2022): 91–109. http://dx.doi.org/10.4314/met.v31i3.6.
Testo completoAbstract (sommario):
EXPLANATION OF THE MASTER LISTSThere are 28 master lists, grouped as convenient taxon groups and split in such a way as to make each list individually downloadable but form an integral part of the main article. Citations to these master lists should be as indicated for the main article. Each master list contains a table that is made up of eight columns and each row represents information on one rearing record. For each master list, the rearing records are ordered under family, subfamily and sometimes tribe headings (in some cases we offer a superfamily instead of a family name where we were uncertain of the family placement). The records are ordered by family, subfamily, species and then rearer name. Explanation of the information contained in each column is as follows:Ref. no. This column contains references to a unique rearing number that links the notes, photographs and reared specimens gathered during the course of the rearing. A blank field indicate that there was no reference number submitted.Lepidoptera species. This column contains the best identification that could be made of the Lepidoptera taxon at the time of publication given the resources available. The name of the taxon specialist who identified the species (if not an author) is given in brackets. A blank cell means that we were unable to identify the taxon with some certainty.Host species (Family). This columns contain the best identifications that could be made of the host species, on which the caterpillar was feeding, at the time of publication given the resources available. A blank cell means that we were unable to identify the plant species to that level with some certainty or that feeding by the caterpillar was not confirmed. In the majority of cases the host indicated is the host on which the life stage was collected in the wild and on which the caterpillar fed subsequently. In cases where the host was presented to the larva in captivity, this is indicated. Where relevant, the name of the determiner is given in brackets. The host family name is given at the end in brackets. The phrase “reared ab ovum” means that the pictured larva was reared from the egg, meaning that the entire life-history of the species (all larval instars) was recorded and documented. In most cases such larvae were reared from eggs laid by a female moth collected at a light but raised on a natural host-plant of the species (though not necessarily one occurring at the locality where the female was taken), in some cases such larvae were reared from eggs found laid on a host-plant in the wild, and in a few cases the larvae were reared on an unnatural (exotic) host-plant in captivity. Such imprecisions regarding host use are, however, also contained in records of field-collected larvae, as mature larvae sometimes feed on plants they will not take in the early instars but do switch to at a later stage, and many also naturally feed on exotic plants in the wild.Locality. This column contains a short standardised reference to the locality where the specimen used in the rearing was collected, be it any life stage or a female from which eggs were obtained. The locality field lists, in order, the locality description, followed by the closest town, province (where relevant) and then country.Date of collection (c), pupation (p), emergence (e). This column contains the dates as indicated, where available. Missing dates are indicated by a “?”.Rearer. This column contains the name(s) of the person(s) who conducted the rearing, who may or may not have been the person who collected the rearing material.Final instar larva. This column contains the photographs of the caterpillar of the species reared. In most cases they depict the final-instar larva and at the time it was still feeding, but in some cases they show the larva in the pre-pupation phase (usually on the ground) and in a few cases an earlier instar, where for some reason a photograph of the final instar was unavailable.Adult. This column contains photographs of the actual adult specimen reared from the caterpillar shown in the previous column. Photographs marked with * are not of the actual adult specimen which emerged from the imaged larva.
3
Staude, Hermann S., Marion Maclean, Silvia Mecenero, Rudolph J. Pretorius, Rolf G. Oberprieler, Simon Van Noort, Allison Sharp et al. "Geometroidea: Geometridae: Ennominae (3)". Metamorphosis 31, n. 3 (17 marzo 2022): 110–24. http://dx.doi.org/10.4314/met.v31i3.7.
Testo completoAbstract (sommario):
EXPLANATION OF THE MASTER LISTSThere are 28 master lists, grouped as convenient taxon groups and split in such a way as to make each list individually downloadable but form an integral part of the main article. Citations to these master lists should be as indicated for the main article. Each master list contains a table that is made up of eight columns and each row represents information on one rearing record. For each master list, the rearing records are ordered under family, subfamily and sometimes tribe headings (in some cases we offer a superfamily instead of a family name where we were uncertain of the family placement). The records are ordered by family, subfamily, species and then rearer name. Explanation of the information contained in each column is as follows:Ref. no. This column contains references to a unique rearing number that links the notes, photographs and reared specimens gathered during the course of the rearing. A blank field indicate that there was no reference number submitted.Lepidoptera species. This column contains the best identification that could be made of the Lepidoptera taxon at the time of publication given the resources available. The name of the taxon specialist who identified the species (if not an author) is given in brackets. A blank cell means that we were unable to identify the taxon with some certainty.Host species (Family). This columns contain the best identifications that could be made of the host species, on which the caterpillar was feeding, at the time of publication given the resources available. A blank cell means that we were unable to identify the plant species to that level with some certainty or that feeding by the caterpillar was not confirmed. In the majority of cases the host indicated is the host on which the life stage was collected in the wild and on which the caterpillar fed subsequently. In cases where the host was presented to the larva in captivity, this is indicated. Where relevant, the name of the determiner is given in brackets. The host family name is given at the end in brackets. The phrase “reared ab ovum” means that the pictured larva was reared from the egg, meaning that the entire life-history of the species (all larval instars) was recorded and documented. In most cases such larvae were reared from eggs laid by a female moth collected at a light but raised on a natural host-plant of the species (though not necessarily one occurring at the locality where the female was taken), in some cases such larvae were reared from eggs found laid on a host-plant in the wild, and in a few cases the larvae were reared on an unnatural (exotic) host-plant in captivity. Such imprecisions regarding host use are, however, also contained in records of field-collected larvae, as mature larvae sometimes feed on plants they will not take in the early instars but do switch to at a later stage, and many also naturally feed on exotic plants in the wild.Locality. This column contains a short standardised reference to the locality where the specimen used in the rearing was collected, be it any life stage or a female from which eggs were obtained. The locality field lists, in order, the locality description, followed by the closest town, province (where relevant) and then country.Date of collection (c), pupation (p), emergence (e). This column contains the dates as indicated, where available. Missing dates are indicated by a “?”.Rearer. This column contains the name(s) of the person(s) who conducted the rearing, who may or may not have been the person who collected the rearing material.Final instar larva. This column contains the photographs of the caterpillar of the species reared. In most cases they depict the final-instar larva and at the time it was still feeding, but in some cases they show the larva in the pre-pupation phase (usually on the ground) and in a few cases an earlier instar, where for some reason a photograph of the final instar was unavailable.Adult. This column contains photographs of the actual adult specimen reared from the caterpillar shown in the previous column. Photographs marked with * are not of the actual adult specimen which emerged from the imaged larva.
4
Staude, Hermann S., Marion Maclean, Silvia Mecenero, Rudolph J. Pretorius, Rolf G. Oberprieler, Simon Van Noort, Allison Sharp et al. "Geometroidea: Geometridae: Desmobathrinae, Ennominae (1)". Metamorphosis 31, n. 3 (17 marzo 2022): 72–90. http://dx.doi.org/10.4314/met.v31i3.5.
Testo completoAbstract (sommario):
EXPLANATION OF THE MASTER LISTSThere are 28 master lists, grouped as convenient taxon groups and split in such a way as to make each list individually downloadable but form an integral part of the main article. Citations to these master lists should be as indicated for the main article. Each master list contains a table that is made up of eight columns and each row represents information on one rearing record. For each master list, the rearing records are ordered under family, subfamily and sometimes tribe headings (in some cases we offer a superfamily instead of a family name where we were uncertain of the family placement). The records are ordered by family, subfamily, species and then rearer name. Explanation of the information contained in each column is as follows:Ref. no. This column contains references to a unique rearing number that links the notes, photographs and reared specimens gathered during the course of the rearing. A blank field indicate that there was no reference number submitted.Lepidoptera species. This column contains the best identification that could be made of the Lepidoptera taxon at the time of publication given the resources available. The name of the taxon specialist who identified the species (if not an author) is given in brackets. A blank cell means that we were unable to identify the taxon with some certainty.Host species (Family). This columns contain the best identifications that could be made of the host species, on which the caterpillar was feeding, at the time of publication given the resources available. A blank cell means that we were unable to identify the plant species to that level with some certainty or that feeding by the caterpillar was not confirmed. In the majority of cases the host indicated is the host on which the life stage was collected in the wild and on which the caterpillar fed subsequently. In cases where the host was presented to the larva in captivity, this is indicated. Where relevant, the name of the determiner is given in brackets. The host family name is given at the end in brackets. The phrase “reared ab ovum” means that the pictured larva was reared from the egg, meaning that the entire life-history of the species (all larval instars) was recorded and documented. In most cases such larvae were reared from eggs laid by a female moth collected at a light but raised on a natural host-plant of the species (though not necessarily one occurring at the locality where the female was taken), in some cases such larvae were reared from eggs found laid on a host-plant in the wild, and in a few cases the larvae were reared on an unnatural (exotic) host-plant in captivity. Such imprecisions regarding host use are, however, also contained in records of field-collected larvae, as mature larvae sometimes feed on plants they will not take in the early instars but do switch to at a later stage, and many also naturally feed on exotic plants in the wild.Locality. This column contains a short standardised reference to the locality where the specimen used in the rearing was collected, be it any life stage or a female from which eggs were obtained. The locality field lists, in order, the locality description, followed by the closest town, province (where relevant) and then country.Date of collection (c), pupation (p), emergence (e). This column contains the dates as indicated, where available. Missing dates are indicated by a “?”.Rearer. This column contains the name(s) of the person(s) who conducted the rearing, who may or may not have been the person who collected the rearing material.Final instar larva. This column contains the photographs of the caterpillar of the species reared. In most cases they depict the final-instar larva and at the time it was still feeding, but in some cases they show the larva in the pre-pupation phase (usually on the ground) and in a few cases an earlier instar, where for some reason a photograph of the final instar was unavailable.Adult. This column contains photographs of the actual adult specimen reared from the caterpillar shown in the previous column. Photographs marked with * are not of the actual adult specimen which emerged from the imaged larva.
5
Fields, Paul G., John T. Arnason, Bernard J. R. Philogène, Richard R. Aucoin, Peter Morand e Chantal Soucy-Breau. "PHOTOTOXINS AS INSECTICIDES AND NATURAL PLANT DEFENCES". Memoirs of the Entomological Society of Canada 123, S159 (1991): 29–38. http://dx.doi.org/10.4039/entm123159029-1.
Testo completoAbstract (sommario):
AbstractThe thiophenes alpha-terthienyl and methyl-alpha-terthienyl are found in many species of the family Asteraceae and are highly phototoxic to mosquito larvae. These compounds and a synthetic analogue, cyano-alpha-terthienyl, controlled Aedes intrudens Dyar (Diptera: Culicidae) larvae at application rates between 10 and 40 g per hectare in field trials. These concentrations are similar to those currently used with chemical control agents. Piperonyl butoxide, a synergist used with pyrethrin, greatly increased the mortality of mosquito larvae at low application rates of the most potent phototoxin, cyano-alpha-terthienyl.Although we have demonstrated previously that these phototoxic defences are effective against some phytophagous insects, more recently we studied insects that are able to feed on a phototoxic plant, in order to examine modes of resistance to phototoxins. Chrysolina spp. (Coleoptera: Chrysomelidae) larvae are susceptible to phototoxicity but avoid it by feeding on Hypericum perforatum L. (Hypericaceae) at dawn and by hiding during the day. Chrysolina adults avoid phototoxicity by the presence of opaque cuticles that block the sunlight. First-instar larvae of Anaitis plagiata (L.) (Lepidoptera: Geometridae) avoid feeding on the glands that contain the phototoxin. Later-instar larvae feed on the entire leaf, yet are not susceptible to phototoxicity, indicating they have biochemical defenses against photo-induced damage.
6
Pinault, Lauren, Graham Thurston e Dan Quiring. "Interaction of foliage and larval age influences preference and performance of a geometrid caterpillar". Canadian Entomologist 141, n. 2 (aprile 2009): 136–44. http://dx.doi.org/10.4039/n08-052.
Testo completoAbstract (sommario):
AbstractIn two recent studies it was reported that feeding on foliage of multiple age classes can improve insect fitness, but it was not determined whether the increase in fitness was due to larvae obtaining a more balanced diet (the balanced-diet hypothesis) or to a difference in the nutritional requirements between young and old larvae (the ontogenetic hypothesis). To test these two hypotheses, we examined the foraging behaviour and performance of young (second or third to fourth instar) and old (third or fourth to fifth instar) larvae of the pale-winged gray moth, Iridopsis ephyraria (Walker) (Lepidoptera: Geometridae), on different-aged foliage of eastern hemlock, Tsuga canadensis (L.) Carrière (Pinaceae), during an outbreak in southwestern Nova Scotia. Defoliation attributed to I. ephyraria was highest on current-year foliage and gradually declined with foliage age. Young larvae were only observed feeding on current-year shoots but old larvae fed on foliage of all ages. When forced to feed on foliage of specific ages in manipulative field studies, survival rates of young and old larvae were highest on current-year and old (≥1 year old) foliage, respectively. However, both young and old larvae had higher survival rates when provided with access to foliage of all age classes than when they were forced to feed on only young or old foliage. Thus, this study supports both the balanced-diet and ontogenetic hypotheses.
7
Adair, R. J., e J. K. Scott. "The life-history and host specificity of Comostolopsis germana Prout (Lepidoptera: Geometridae), a biological control agent of Chrysanthemoides monilifera (Compositae)". Bulletin of Entomological Research 79, n. 4 (novembre 1989): 649–57. http://dx.doi.org/10.1017/s0007485300018800.
Testo completoAbstract (sommario):
AbstractLarvae of the southern African geometrid moth Comostolopsis germana Prout feed on the shoot apices and axillary buds of Chrysanthemoides monilifera, a serious alien weed of native vegetation in Australia. The insect was found in low abundance throughout the distribution of its hosts, C. incana and C. monilifera, in southern Africa. Larvae were present throughout the year in subtropical Natal, but were absent in winter in the cooler, Mediterranean type climate of Cape Province. In host-specificity tests using 65 plant species from 26 families, Comostolopsis germana completed development only on Chrysanthemoides monilifera monilifera and C. monilifera rotundata. Insignificant, exploratory feeding occurred on Olearia axillaris (Compositae) and pea, Pisum sativum (Leguminosae). In multiple-choice oviposition tests eggs were laid on 41 species, but a strong preference was shown for the foliage and stems of C. monilifera. Larvae grazing the flower buds, pedicels and peduncles of C. monilifera may reduce the reproductive capacity of their host and contribute to its control. Comostolopsis germana has been approved for release as a biological control agent of Chrysanthemoides monilifera in Australia.
8
Fields, Paul G., John T. Arnason e Bernard J. R. Philogène. "Behavioural and physical adaptations of three insects that feed on the phototoxic plant Hypericum perforatum". Canadian Journal of Zoology 68, n. 2 (1 febbraio 1990): 339–46. http://dx.doi.org/10.1139/z90-049.
Testo completoAbstract (sommario):
Chrysolina hyperici, C. quadrigemina (Coleoptera: Chrysomelidae), and Anaitis plagiata (Lepidoptera: Geometridae) all feed on St. John's-wort (Hypericum perforatum), in spite of the presence of the phototoxin hypericin, which has been shown to be toxic to other insects. Fourth instar Chrysolina spp. larvae fed at dawn, then hid in the soil for the remainder of the day. When larvae were forced to remain in the light, mortality was positively correlated with light intensity. This susceptibility to light may be related to the highly transparent larval cuticle which transmitted over 60% of the photosensitizing wavelengths (540–610 nm). Chrysolina adults differed from the larvae in that they were sun loving, fed on St. John's-wort during the day, and basked at the tips of the branches. Adult cuticles only transmitted 0.1–0.2% of the photosensitizing wavelengths. Third instar A. plagiata larvae remained on the plant at all times, feeding both during the day and night. In the 5th instar, larvae burrowed into the soil during the day and fed mostly at night, much like late instar Chrysolina larvae. However, A. plagiata larvae suffered no ill effects if forced to remain in the light. Part of their resistance to photosensitization may be explained by the low transmittance of their cuticle (20%).
9
Huff, A. N., T. N. Meacham e M. L. Wahlberg. "Feeds and feeding: A review". Journal of Equine Veterinary Science 5, n. 2 (gennaio 1985): 96–108. http://dx.doi.org/10.1016/s0737-0806(85)80056-3.
Testo completo
10
Chagan, Farida Karim, Sidra Malik Fayyaz e Iram Saddiqa Aamir. "BREAST FEEDING OUTCOME". Professional Medical Journal 23, n. 06 (10 giugno 2016): 715–20. http://dx.doi.org/10.29309/tpmj/2016.23.06.1620.
Testo completoAbstract (sommario):
Objectives: To determine the prevalence of prelacteal feeding among mothers ofPakistan and to find out the various concepts behind this practice and fundamentally to establishthe association of prelacteal feeding with breastfeeding outcomes. Background: In Pakistan,many efforts have been done to emphasize the nutritional importance and adequacy of breastmilk for the newborns. Despite such efforts, it has been witnessed on multiple occasions thatprior to the commencement of breastfeeding, prelacteal feeds are introduced by the mothers totheir young ones. Prelacteal feed (PLF) are food supplements that are given to newborns orally.Design: Qualitative, descriptive, cross sectional Survey. Setting: The Lady Dufferin Hospital(LDH) and Jinnah Medical College hospital (JMCH). Methods: Study includes 400 Mothersincluding young mothers and data was collected with use of a pre-assessed authenticatedquestionnaire. Results: A large group of, both educated and uneducated, mothers knew aboutPLF administration (90.5%). Out of these, 70% mothers routinely give prelacteal feeds, withreadymade ghutti and honey being the most widely used supplements, 19.5% and 37.2%respectively .However their reasons for doing so differed significantly. Family tradition (27.8%)and religious credence (21.8%) are the most popular reasons for practicing prelacteal feeding.The other minor reasons are breast milk insufficiency, prevention of dehydration, hypoglycaemia,preparation of the gastrointestinal tract for digestion and to quench thirst. However, majorityof the subjects were aware of the benefits of breastfeeding and 99% mothers breastfed theirchildren. Conclusions: Regardless of the fact that mothers understand the significance ofbreast milk, most mothers routinely and unnecessarily give prelacteal feeds. Therefore, mothersshould be discouraged for the unsafely administration of prelacteal feeds and re-emphasizedabout the importance and nutritional adequecy of breastfeeding.
Tesi sul tema "Geometridae Feeding and feeds"
1
Lee, Cheuk-hung, e 李卓雄. "Microbial contamination of enteral feeds". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B31245596.
Testo completo
2
Beattie, Tara Kate. "Microbial contamination of enteral tube feeds and feeding systems". Thesis, University of Strathclyde, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417337.
Testo completo
3
Browman, Howard I. "Feeding behaviour in fry of Atlantic salmon, Salmo salar L". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63129.
Testo completo
4
Van, Niekerk S. J. (Sarel Johannes). "Actual and predicted performance of broiler chickens". Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/49817.
Testo completoAbstract (sommario):
Assignment (MPhil)--University of Stellenbosch, 2004.ENGLISH ABSTRACT: The aim of this study was to evaluate the performance and profitability of different dietary specifications for broiler chickens slaughtered at 35 days of age. Two trials were performed to evaluate different production parameters. The results of these trials were compared to the predicted results of the EFG broiler model. No carcass data were available for the two trials mentioned above. Therefore, in order to evaluate the accuracy of the broiler model when predicting carcass characteristics, two published data sets (Leeson et al., 1996a) were used. Predicted and actual values were compared, evaluated and discussed. Two broiler trials were performed. In Trial One the amino acid density decreased throughout the range of three treatments from prestarter to finisher diets. In Trial Two the amino acid density decreased only in the four finisher diets. The main difference between predicted and actual results was the response to body weight. The model predicted a steady increase in feed intake to compensate for the lower dietary specifications while body weight did not change significantly. This increase in feed intake seems to be enough to maintain body weight. Trial birds also increased their feed intake as dietary amino acid density decreased, but this compensation seemed to be too low to maintain body weight compared to the control diet. The birds may find it easier to compensate when they have time to adapt to the specification. There is evidence in the literature that birds need seven days to adapt their feed intake to a lower feed specification (Leeson et al., 1996a). It can be speculated that the trial birds started to loose body weight due to a lower amino acid intake in this period. The model seems to adapt feed intake immediately after a change in diet specification. The simulation on literature data lead to the following conclusions: 1) Broilers posses the capacity to increase their feed intake with at least 65% should finisher diets with lower amino acid and energy concentrations be supplied. If only the energy concentration of finisher diets were decreased, the increase in feed intake will be around 30%. (see Table 16 and 23) 2) The accurate prediction of feed intake from the given dietary specification has a major influence on the accuracy of the prediction of broiler performance. 3) Amino acid density and DLys:ME ratio plays a significant role in the control and prediction of feed intake. The EFG broiler model is based on sound scientific principles. The model is comprehensive and can be used for a wide range of environmental and management conditions as well as dietary conditions. The nutritionist can use the model with confidence to assist in practical feed formulation. The actual strength of the model lies in the time and money being saved compared to practical trials.
AFRIKAANSE OPSOMMING: Die doel van hierdie studie is om die prestasie en winsgewendheid van braaikuikens te bepaal wanneer voere met verskillende digthede tot op 35 dae gevoer word. Twee eksperimente is uitgevoer om produksieresultate te evalueer. Die resultate van hierdie eksperimente is met die voorspelde waardes uit die EFG simulasie-model vergelyk. Aangesien geen karkasdata vir bogenoemde eksperimente beskikbaar was nie, is twee gepubliseerde datastelle gebruik om hierdie deel van die model te evalueer (Leeson et al., 1996a). Twee braaikuiken eksperimente is uitgevoer. Eksperiment Een het uit drie behandelings bestaan waarvan die aminosuur-konsentrasie vanaf dag een tussen behandelings verskil het. In Eksperiment Twee het die aminosuur-konsentrasie net in die vier afrondingsdiëte verskil. Liggaamsmassa op 35 dae het die grooste verskil tussen voorspelde- en werklike waardes getoon. Beide voorspelde en werklike innames het in albei eksperimente verhoog soos wat aminosuur-konsentrasie afgeneem het. Voorspelde liggaamsmassa het egter konstant gebly terwyl werklike data 'n afname in liggaamsmassa getoon het. Dit bleik dat die voorspelde toename in innames voldoende was om massa te onderhou terwyl die voëls in werklikheid nie genoeg gekompenseer het nie. Leeson et al., 1996a het tot die gevolgtrekking gekom dat braaikuikens minstens sewe dae benodig om hul voeriname by 'n nuwe spesifikasie aan te pas. So 'n stadige aanpassing kan daartoe lei dat energie- en aminosuur-inname daal indien 'n dieet met laer spesifikasie gevoer. Dit sal daartoe lei dat die kuikens liggaamsmassa verloor. Uit die literatuur simulasies is die volgende afleidings gemaak: 1) Braaikuikens besit die vermoeë om voerinname in die afrondingstyd met minstens 65% te verhoog indien 'n afrondingvoer met laer amiosuur- asook energiekonsentrasie gevoer word. Indien net die energiekonsentrasie verlaag word, sal die inname met sowat 30% verhoog. 2) Die akkurate voorspelling van inname is krities vir die akkurate voorspelling van produksieparameters. 3) Aminosuur-digtheid en DLys:ME speel 'n belangrike rol in die beheer en voorspelling van voerinname by braaikuikens. Die EFG braaikuikenmodel is op suiwer wetenskaplike beginsels geskoei. Die model is omvattend en kan vir 'n wye reeks van omgewings- en bestuurstoestande asook dieet-spesifikasies gebruik word. Die voedingkundige kan die model met vertroue gebruik om met praktiese voerformulering by te staan. Die model kan die formuleerder baie tyd spaar aangesien praktiese eksperimente ingeperk kan word.
5
Thomson, Douglas Edward. "Determination of the effects of fish size and feed pellet size on the settling characteristics of Rainbow trout (Salmo gairdneri) culture cleaning wastes". Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26649.
Testo completoAbstract (sommario):
This research reports on the determination of the effects of fish size and feed pellet size on the settling characteristics of Rainbow trout (Salmo gairdneri) culture, tank cleaning wastes.
Flocculant particle settling curves (Type II) were developed from settling column analysis of cleaning wastes from 11-311 gram Rainbow trout fed a moist pellet diet (Oregon Moist Pellet ®). Four feed pellet sizes were investigated: 3/32, 1/8, 5/32 and 3/16 inch.
Overall non-filterable residue removal curves and individual particle settling velocity distribution curves, derived from the Type II settling curve of each fish size and feed pellet size group, were compared. Slopes and y-intercepts of the linearized overall non-filterable residue removal curves and individual particle settling velocity distribution curves were compared using the Equality of Slope Test (S:SLTEST).
Results of the test for a common regression equation indicated there were no significant differences in the proportional distribution of particle sizes within the cleaning wastes. Variations observed in the initial rates of removal within the overall non-filterable residue removal curves were considered insignificant
Settling trials were pooled in order to obtain single curves, characterizing the overall solids removal rate and the individual particle settling velocity distribution of the waste solids.Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
6
Fontana, Eddy Alejandro. "Effects of various male feeding regimens on reproduction in broiler breeders". Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43750.
Testo completoAbstract (sommario):
A study was conducted using commercial broiler breeders with the males fed a diet containing, either 120/0 or 140/0 protein and body weight maintained at either 900/0 or 1000/0 of that recommended by the primary breeder (fed separately), or allowed to eat from the female feeders (controls). Female feeders in the separately fed pens were equipped with especially designed grills, which denied access to the males. The male feeder in these pens was elevated so that females were denied access.
Males fed separately (body weight 90% or 1000/0, and dietary protein 120/0 or 140/0) had a significantly higher percentage fertility (4.20/0) than males allowed to eat with the females. No differences in percentage fertility were found among the four separately fed groups. No differences were noted in percentage hatch of fertile eggs among any of the treatment groups.
Males eating from the female feeders had significantly heavier body weights and testes weights at 65 weeks of age than breeder males in the separately fed, groups. Mean body weights were 3819g and 4773g at 35 weeks of age, and 4192g and 5443g at 65 weeks of age for males eating separately and eating with the females, respectively. Furthermore, males in the control group had significantly larger breast angle measurements when compared with the separately fed males. No differences were observed in foot scores and semen concentration among males in the various treatment groups.
Master of Science
7
Lehmann, Maryna. "Replacing maize with barley in concetrates fed to jersey cows grazing on kikuyu/ryegrass pasture". Thesis, Nelson Mandela Metropolitan University, 2004. http://hdl.handle.net/10948/181.
Testo completoAbstract (sommario):
The aim of the first study was to determine if barley could replace maize as an energy source in concentrates fed to dairy cows grazing on kikuyu/ryegrass pasture without affecting the milk production, milk composition, or cause metabolic disorders. Sixty Jersey cows, in early to mid lactation were randomly allocated to one of five treatments (n = 12) based on feeding concentrates with different ratios of maize to barley, ranging from 100:0, 75:25, 50:50, 25:75 and 0:100, respectively. Concentrates contained 12 MJ ME kg -1 and 130g CP kg-1 DM and cows were fed 3 kg (as-is) concentrate after each milking for a period of 42 days (14-day adaptation and 28-day measurement). Cows strip-grazed the irrigated kikuyu/ryegrass pastures (15.7 ± 1.8 percent DM; 20.2 ± 4.3 percent CP; 44.7 ± 3.5 percent NDF). Milk weights were recorded daily and milk samples collected weekly and analyzed for milk fat and protein content. Body condition score and live weight were recorded at the start and end of the experimental period. Data of all the studies were subjected to a one-way ANOVA. Daily milk yield, FCM, MUN, milk fat yield, milk fat percent, protein yield, protein percent, live weight change, or body condition score change were not affected by treatment and values were 15.8 kg, 17.2 kg, 14.9 mg dl-1, 0.72 kg, 4.56 percent, 0.59 kg, 3.77 percent, 6.67 kg, and 0.15 BCS; 15.6 kg, 17.4 kg, 15.2 mg dl-1, 0.73 kg, 4.3 percent, 0.57 kg, 3.71 percent, 1.33 kg and 0.04 BCS; 17.2 kg, 17.9 kg, 15.2 mg dl-1, 0.74 kg, 4.36 percent, 0.63 kg, 3.71 percent, 0.33 kg and 0.08 BCS; 15.6 kg, 16.4 kg, 15.5 mg dl-1, 0.67 kg, 4.33 percent, 0.60 kg, 3.83 percent, -1.46 kg and 0.11 BCS; and 15.0 kg, 16.0 kg, 15.5 mg dl-1, 0.67 kg, 4.57 percent, 0.57 kg, 3.85 percent, 8.86 kg, and 0.05 BCS, respectively for the cows fed 100:0, 75:25, 50:50, 25:75 and 0:100 maize to barley ratio concentrate. According to these results, barley can replace maize without significantly affecting the milk production or milk composition. None of the cows presented any visible symptoms of acidosis. As it was clear from the results in the first study that maize could replace barley the aim of study 2A was therefore focused on determining the effect of feeding different levels of such a barley-based (2.4, 4.8 or 7.2 kg cow-1day-1) concentrate, on milk production, milk composition and live weight change of Jersey cows on kikuyu/ryegrass pasture (23.1 ± 2.95 percent DM, 11.1 ± 0.11 percent CP, 60.8 ± 0.58 percent NDF). Forty-five Jersey cows (early- to mid lactation), were randomly allocated to one of three treatments (n = 15) involving different levels of concentrate (12 MJ ME and 130g CP kg-1 DM) feeding for a period of 42 days (14-day adaptation and 28-day measurement). Milk weights were also recorded daily, and milk samples collected weekly, and analyzed for milk fat and protein. Body condition score and live weight were recorded at the start and end of the experimental period. The results of this study indicated that increasing the concentrate level from 2.4 to 4.8 and 7.2kg cow-1day-1 did not increase the milk yield (14.0 kg, 15.2 kg, 14.4 kg; P = 0.19). The FCM production increased from 15.8 to 17.5kg (P = 0.04) as the concentrate level increased from 2.4 to 4.8kg cow-1day-1. Increasing the concentrate from 4.8 to 7.2kg cow-1day-1 did not result in a significant increase in FCM. The milk protein percent increased significantly from 3.4 - 3.6 percent when the concentrate feeding level was increased from 2.4 to 7.2kg cow-1day-1. The MUN levels were 17.09 mg dl-1, 16.03 5 mg dl-1, and 16.36 mg dl-1 for the 2.4, 4.8 and 7.2kg cow-1day-1 concentrate levels, respectively. This is well within the recommended MUN levels (12 – 18 mg dl-1) indicating that sufficient protein was fed to cows. Increasing the concentrate level from 4.8 to 7.2 kg cow-1day-1 did not increase production, probably due to a higher pasture substitution rate. Supplementing large quantities of rapidly fermentable grains, such as barley, can suppress rumen pH and may have a negative effect on the rate and extent of fibre digestion in the rumen. Therefore the aim of study 2B was not only to determine the effect of feeding different levels of a barley-based concentrate, on milk production, milk composition and live weight change, but was also to determine the effect of a low (4.8 kg cow-1day-1) versus a high (7.2 kg cow-1day-1) level of barley-based concentrate supplementation on ruminal DM and NDF degradability of Westerworld ryegrass sampled from the pastures that these cows were grazing on. Sixty Jersey cows (early- to mid lactation), were randomly allocated to one of three treatments (n = 20) involving different levels of concentrate feeding. Concentrate (12 MJ ME, 130g CP kg-1 DM) was fed at 2.4, 4.8 or 7.2 kg cow-1day-1 for a period of 74 days (14-day adaptation and 60-day measurement). These cows stripgrazed irrigated kikuyu/ryegrass pastures (14.7 ± 4.37 percent DM, 25.1 ± 1.53 percent CP, and 44.4 ± 2.58 percent NDF) at a daily pasture allocation of 10 kg DM cow-1. Milk weights were recorded daily and milk samples collected weekly and analyzed for milk fat and protein. Body condition score and live weight were recorded at the start and end of the experimental period. Twelve Jersey cows, fitted with ruminal cannulae, were randomly allocated to two of the three treatments in the production study and received either 2.4 or 7.2 kg cow-1 day-1, of the same barley-based concentrate, in a two-period crossover design. These cows strip-grazed the same irrigated kikuyu/ryegrass pastures as the sixty cows in the production study. Each period consisted of 21 days for adaptation and seven days for data collection. Rumen liquor samples were collected every 4 hours within a 24-hour cycle and repeated once. Rumen pH was measured immediately, recorded, and the supernatant fluid preserved and frozen, pending VFA analysis. The in situ nylon bag technique was used to determine DM and NDF degradation and dried samples of Westerworld ryegrass pasture were incubated for 0, 4, 8, 12, 20, 30, 48, 72 and 96 hours. The data were fitted in the non-linear model p = a + b (1-exp-ct) (Ørskov & McDonald, 1979). Daily milk production, fat corrected milk, milk fat yield and milk fat percent were not affected by treatment and values were 17.3 kg, 18.4 kg, 0.76 kg and 4.42 percent; 19.0 kg, 20.0 kg, 0.82 kg and 4.35 percent; and 18.1 kg, 19.1 kg, 0.79 kg and 4.37 percent for the 2.4, 4.8 and 7.2 kg cow-1 day-1 concentrate treatments, respectively. Milk protein percentage of cows on the 7.2 kg concentrate cow-1 day-1 was significantly higher than that of cows on 4.2 kg concentrate cow-1 day-1 feeding level. Live weight increased significantly as the level of concentrate feeding increased and values were 17.9 kg; and 28.9 kg on the 2.4 and 7.2kg concentrate treatment, respectively. There was a significant increase in the live weight of cows that were fed 7.2 kg cow-1 day-1 (as-is) in comparison to those cows that were fed 2.4 kg concentrate cow-1 day-1 (as-is). This may have resulted from more nutrients being partitioned to live weight gain rather than milk production. No further response in milk production was observed when concentrate daily feeding was increased from 4.8 to 7.2 kg cow-1 day-1. It is postulated that the higher concentrate allowance resulted in a higher substitution rate and lower DMI intake from pasture. 6 There was no significant decline in the rumen pH (6.2 ± 0.4 and 6.2 ± 0.5) when the concentrate level was increased from 2.4 to 7.2 kg cow-1 day-1 (as-is). The total VFA (118.1 ± 45.9 and 139.4 ± 45.6 mmol L-1) and isovalerate (0.009 ± 0.07 and 0.248 ± 0.52 mmol L-1) increased significantly when the concentrate was increased from 2.4 to 7.2 kg cow-1day-1. No other rumen parameters were affected by treatment. Ruminal DM and NDF degradability of the Kikuyu/ryegrass pature were not affected by the level of concentrate supplementation. An increase in the concentrate level from 2.4 to 7.2 kg cow-1day-1 did not reduce degradability of either DM (94.67 ± 5.97, 94.49 ± 5.09; P = 0.919) or NDF (92.15 ± 8.69, 94.4 ± 11.73; P = 0.451), respectively. Results of rumen parameters and PD values were within the range reported by Bargo et al., (2003), viz. pH 5.76 – 6.29, NH3-N concentration 8.7 – 32.2 mg dl-1, total VFA concentration 90.3 - 151.4 mmol L-1 and PD values 89.5 – 93.5 % reported by Bargo et al. (2003). According to these authors, there is no simple relationship between any amount of the concentrate supplemented, and the ruminal pH and concentrate feeding only affects the in situ ruminal digestion of pasture when it is fed, at quantities higher than 8 kg DM cow-1day-1 (Bargo et al., 2003).
8
Crots, Frans (Francois Engelbertus). "The effect of feed processing techniques on weanling piglet performance". Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53106.
Testo completoAbstract (sommario):
Thesis (MScAgric)--University of Stellenbosch, 2002.ENGLISH ABSTRACT: Starch is the main component of cereal grains and is usually the primary energy source for pigs and poultry. Feed manufacturing can adopt several measures, including physical treatments such as milling or pelleting and other techniques, such as enzyme treatment, to disrupt cell structure. Grinding and pelleting are the most common food processing methods used for pigs. However, pelleting of complete balanced feeds is no longer such an economical proposition due to rising energy and equipment costs; therefore this cost has to be outweighed by an increased production efficiency. It has been known for many years that grinding is an essential prerequisite for the satisfactory blending of the ingredients of a multi-component food. Feed cost represents the major item in the cost of animal production. Without doubt, research and production efforts will continue to refine feed processing techniques to reduce the cost of feed and to increase the value of feed for a target animal. The possibilities for improvements in feed are endless; however the cost of each innovation must be carefully weighed against demonstrated improvements in animal performance. Experiment 1: The effect of feed processing techniques on weanling pig growth-performance The effects of processing of the carbohydrate source and the feed on growth performance of commercial Landrace x Large White piglets (n=480) weaned at 28 ± 2 d were investigated. Two processing combinations of the carbohydrate source were used with 3 processing conditions of the diet in a 2 x 3 factorial design. The pigs were blocked by weight (7.196 ± 2.03 kg BW) and then allotted randomly to 1 of 6 dietary treatments. Ten pens of 8 piglets each were fed with each dietary treatment. The two main processing conditions of the carbohydrate source were raw or extruded maize and the 3 processing conditions of the diet was meal or pelleted or extruded. No carbohydrate processing x diet processing interactions were observed (P > 0.05) for ADG, ADFI or FeR. In this experiment, extrusion of the maize led to an significant decrease in FeR efficiency (P < 0.05) (1.57 vs. 1.42) when compared to a raw maize diet. Pelleting a diet had no significant effect (P > 0.05) on ADG but tended to decrease ADFI (P < 0.07) and significantly improve FeR efficiency (1.49 vs. 1.66) when compared to a meal diet. Extruding the whole diet did not have any significant (P > 0.05) effect on ADG but tended to decrease ADFI (P < 0.07) and gave an significant improvement in FeR when compared to a meal diet (1.34 vs. 1.66). This processing technique also gave a significant improvement (P < 0.01) in FeR when compared to a pelleted diet (1.34 vs. 1.49). Experiment 2: The effect of pig feed processing conditions on pig metabolism parameters The effects of processing of the carbohydrate source and the diet on certain metabolism and production parameters of commercial Landrace x Large White pigs (n=24) were investigated. Two processing combinations of the carbohydrate source were used with 3 processing combinations in a 2 x 3 factorial design. Six diets were formulated on an iso-nutrient basis (14.48 MJ/kg metabolizable energy (ME), 23.01 crude protein (CP), 1.092% lysine, 0.742% methionine and cystine and 0.271% tryptophan on a DM basis). The pigs were blocked by weight (26.02 ± 0.25 kg BW) and then allotted randomly to I of 6 dietary treatments. The carbohydrate source was raw or extruded maize and the diets was meal or pelleted or extruded. No carbohydrate processing x diet feed form interactions were observed (P > 0.05) for dry matter intake (DMI), dry matter digestible energy (DE), Nitrogen (N) or dry matter intake (DMI). In a metabolism and nitrogen (N) balance study, apparent N digestibility, digestible energy and metabolizable energy contents were found not to be significantly (P > 0.05) influenced by carbohydrate or diet processing.
AFRIKAANSE OPSOMMING: Stysel is die hoof komponent in grane en is gewoonlik die primêre verskaffer van energie vir varke en pluimvee. Voermeulens kan verskeie metodes implementeer, insluitend fisiese behandeling soos bv. maal, verpilling en ensiem behandelings, om sel struktuur te verander. Maal en verpilling is die mees algemene prosessering metodes wat vir varkvoer gebruik word. Maar, verpilling van totaal geballanseerde voere is nie meer so ekonomies geregverdig nie as gevolg van stygende energie en masjinerie koste. Daarom moet die koste van voervervaardiging oorbrug word deur 'n verhoogde produksiedoeltreffendheid. Dit is al lankal bekend dat maal 'n voorvereiste is vir effektiewe vermenging van grondstowwe van 'n multi-komponent voer. Voerkoste verteenwoordig die hoof item van die koste van intesiewe diereproduksie. Voedingskudiges sal sonder twyfel voortgaan om voerprosessering te verfyn om so die koste van die rantsoen te verlaag en om die waarde van die rantsoen te verhoog vir die dier. Die moontlikhede is veelvuldig, maar die koste van elke ontwikkeling moet opgeweeg word teen verhoogde diereproduksie. Eksperiment 1: Die effek van voerprosesserings-tegnieke op speenvark groei en produksie 'n Proef is uitgevoer om die prosesseringseffek van 'n koolhidraat bron en voer op die groei van Landras x Groot Wit speenvarke (n=480) wat gespeen is op 28 ± 2 d te bepaal. Twee prosesserings-kombinasies van die koolhidraat bron en drie prosesserings-kondisies van die dieet is in 'n 2 x 3 faktoriaal ontwerp uitgevoer. Die varkies is geblok volgens massa (oorspronklik 7.196 kg ± 2 kg) en toe ewekansig in I van 6 dieët behandelings ingedeel. Die proefdiëte is vir lO hokke varkies gevoer, elke hok het 8 varkies in gehad. Die twee hoof prosesserings-kondisies van die koolhidraat bron was rou of gaar mielies en die drie prosesserings-kondisies van die dieët was meelof gaar of geëkstrueer. Geen koolhidraat prosesserings x dieët prosesserings interaksie van die dieët was opgemerk (P > 0.05) vir gemiddelde daaglikse toename (GOT), gemiddelde daaglikse voer inname (GDVI) of voer omset doeltreffendheid (VOD) nie. In die eksperiment was die VOD van die geëkstrueerde mielie dieët, statisties betekenisvol laer (P < 0.05) (1.57 vs.1.42) as die rou mielie dieët. Verpilling van die dieët het geen statisties betekenisvolle effek (P > 0.05) op GDV! gehad nie, maar die VOD was statisties betekenisvol (P < 0.05) beter (1.49 vs. 1.66) wanneer dit met die meel dieët vergelyk word. Ekstrusie van die dieët het geen statisties betekenisvolle effek op GOT en GOVI gehad nie, maar die VOD was statisties betekenisvol (P < 0.05) beter wanneer dit met die meel (1.34 vs. 1.66) en verpilde dieët (1.34 vs 1.49) vergelyk word. Eksperiment 2: Die effek van voer prosessering op vark metabolisme parameters 'n Eksperiment is uitgevoer op Landras x Groot Wit bere (n=24) om die effek van prosessering van 'n koolhidraat bron en voer te bepaal. Twee prosesserings-kombinasies van die koolhidraat bron en drie prosesserings-kondisies van die dieët is in 'n 2 x 3 faktoriaal ontwerp uitgevoer. Ses diëte is geformuleer op 'n iso-nutriënt basis (14.48 MJ/kg metaboliseerbare energie (ME), 23.01 ru-proteïen (RP), 1.092% lisien, 0.742% metionien and sistien en 0.271 % tryptofaan op 'n droeë materiaal (DM) basis). Die varke is geblok volgens massa en ewekansig aan 1 van 6 diëte toegeken. Die koolhidraat bron was gaar of rou mielies en die diëte was meel, verpil of geëkstrueer. Geen koolhidraat-prosessering x dieet interaksie is opgemerk (P > 0.05) nie. In 'n metabolisme en stikstof (N) balans-studie is daar gevind dat DM verteerbaarheid, skynbare N verteerbaarheid, verteerbare energie (GE) en ME inhoud nie beduidend deur die behandelings beïnvloed word nie.
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Atkinson, Michael J. "A comparative study of feeding behavior in ambystoma". Virtual Press, 1985. http://liblink.bsu.edu/uhtbin/catkey/438082.
Testo completo
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De, Silva Lekamwasam L. S. S. K. "Poultry feeds prepared from fermented prawn waste silage". Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/28068.
Testo completoAbstract (sommario):
The use of shrimp processing waste with other cheap raw materials such as cassava was studied as a potential low cost animal feed, specially in developing countries. The impact on the economies of the shrimp industry and possible effects on the environmental were taken into consideration in developing the project.
Libri sul tema "Geometridae Feeding and feeds"
1
Perry, Tilden Wayne. Feeds & feeding. 6a ed. Upper Saddle River, N.J: Prentice Hall, 2003.
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2
1914-, Cullison Arthur Edison, e Lowrey Robert S. 1934-, a cura di. Feeds & feeding. 6a ed. Upper Saddle River, N.J: Prentice Hall, 2003.
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3
Gordon-Watson, Mary. Feeds and feeding. Buckingham: Kenilworth, 1994.
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4
Cullison, Arthur Edison. Feeds and feeding. 4a ed. Englewood Cliffs, NJ: Prentice-Hall, 1987.
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5
Perry, Tilden Wayne. Feeds and feeding. 5a ed. Upper Saddle River, NJ: Prentice Hall, 1999.
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6
Robertson, George. Poultry feeds and feeding. Ottawa: J. de L. Taché, 1997.
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Church, D. C. Livestock feeds and feeding. 3a ed. Englewood Cliffs (N. J.): Prentice-Hall, 1991.
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Church, D. C. Livestock feeds and feeding. 3a ed. Englewood Cliffs, N.J: Prentice Hall, 1991.
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Church, D. C. Livestock feeds and feeding. 2a ed. Englewood Cliffs, N.J: Prentice-Hall, 1986.
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Kellems, Richard O. Livestock feeds and feeding. 6a ed. Boston: Prentice Hall, 2009.
Cerca il testo completoCapitoli di libri sul tema "Geometridae Feeding and feeds"
1
Lukefahr, Steven. "Feeds and feeding." In Rabbit production, 107–24. 10a ed. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789249811.0008.
Testo completoAbstract (sommario):
Abstract This chapter discusses the nutrient requirements; feed formulation; feed composition of clovers, grasses, lucerne, concentrates, grains, feed supplements and feed additives; feed processing and feeding of rabbits.
2
Tucker, Craig S., e Edwin H. Robinson. "Feeds and Feeding Practices". In Channel Catfish Farming Handbook, 291–315. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4757-1376-3_11.
Testo completo
3
Dryden, Gordon McL. "Digestion of feeds." In Fundamentals of applied animal nutrition, 19–34. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781786394453.0003.
Testo completoAbstract (sommario):
Abstract In this chapter the feeding behaviour and digestive physiology, digestive tract function-intrinsic and microbial digestion; functions and anatomy of the digestive tract in animals are discussed.
4
Hawkey, Kerensa, John Brameld, Tim Parr, Andrew Salter e Heidi Hall. "Suitability of insects for animal feeding." In Insects as animal feed: novel ingredients for use in pet, aquaculture and livestock diets, 26–38. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789245929.0004.
Testo completoAbstract (sommario):
Abstract This chapter explores the nutritional composition of insects and the potential benefits and drawbacks for their inclusion into pet, poultry, pig, ruminant and aquatic animal feeds. Six species are most commonly described for use in animal feed, namely black soldier fly (BSF; Hermetia illucens) larvae and prepupae, yellow mealworm (YM; Tenebrio molitor) larvae, superworm (SW; Zophobas morio) larvae, lesser mealworm (LM; Alphitobius diaperinus) larvae, house fly (HF; Musca domestica) larvae and house crickets (HC; Acheta domesticus). The nutritional composition, variability observed due to manipulation of feed source, age, developmental stage and suitability for inclusion into animal feed are compared.
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Boni, Zofia. "“My mum feeds me, but really, I eat whatever I want!”". In Feeding Children Inside and Outside the Home, 107–23. Abingdon, Oxon ; New York, NY : Routledge, 2019.: Routledge, 2018. http://dx.doi.org/10.4324/9781315206974-7.
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Mpairwe, Denis, e David Mutetikka. "Improved feeding for dairy cattle and poultry in smallholder crop-livestock systems." In Sustainable agricultural intensification: a handbook for practitioners in East and Southern Africa, 106–18. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781800621602.0008.
Testo completoAbstract (sommario):
Abstract This chapter describes how cropping systems can be used to supplement feeds to increase dairy and poultry yields. It completes the concept of on-farm integration of crop, livestock and natural resources technologies necessary for sustainable intensification on smallholder farms. The different processes that utilize different feed sources to produce better-quality feed rations for dairy cows and poultry are also discussed.
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Vohnout, K., e C. Jimenez. "Supplemental By-Product Feeds in Pasture-Livestock Feeding Systems in the Tropics". In Tropical Forages in Livestock Production Systems, 71–82. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2015. http://dx.doi.org/10.2134/asaspecpub24.c6.
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Robaina, Lidia, Juhani Pirhonen, Elena Mente, Javier Sánchez e Neill Goosen. "Fish Diets in Aquaponics". In Aquaponics Food Production Systems, 333–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_13.
Testo completoAbstract (sommario):
AbstractFish and feed waste provide most of the nutrients required by the plants in aquaponics if the optimum ratio between daily fish feed inputs and the plant growing area is sustained. Thus, the fish feed needs to fulfil both the fish’s and plant’s nutritional requirements in an aquaponic system. A controlled fish waste production strategy where the nitrogen, phosphorus and mineral contents of fish diets are manipulated and used provides a way of influencing the rates of accumulation of nutrients, thereby reducing the need for the additional supplementation of nutrients. To optimize the performance and cost-effectiveness of aquaponic production, fish diets and feeding schedules should be designed carefully to provide nutrients at the right level and time to complement fish, bacteria and plants. To achieve this, a species-specific tailor-made aquaponic feed may be optimized to suit the aquaponic system as a whole. The optimal point would be determined based on overall system performance parameters, including economic and environmental sustainability measures. This chapter thus focuses on fish diets and feed and reviews the state of the art in fish diets, ingredients and additives, as well as the nutritional/sustainable challenges that need to be considered when producing specific aquaponic feeds.
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Cheeke, Peter R. "Toxins in Feeds". In Rabbit Feeding and Nutrition, 276–94. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-08-057078-5.50020-0.
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Orr, R. M. "Livestock feeds and feeding". In Primrose Mcconnell's the Agricultural Notebook, 365–87. Elsevier, 1988. http://dx.doi.org/10.1016/b978-0-408-03060-1.50019-9.
Testo completoAtti di convegni sul tema "Geometridae Feeding and feeds"
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Carrierfenster, Kristen, Christine Rue-Donlon e Rubia Khalak. "Getting to Full Feeds Faster in the Nicu Utilizing Cue-based Feeding". In Selection of Abstracts From NCE 2016. American Academy of Pediatrics, 2018. http://dx.doi.org/10.1542/peds.141.1_meetingabstract.522.
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Musial, Abigail, Owen Densel, Conor Merritt, Lacey Yeager, Angela Younts, Jodi Kelley, James Rudloff, Lori Herbst, Angela Statile e Amanda Schondelmeyer. "1 Decreasing time to goal enteral feeds in children with medical complexity with feeding intolerance". In IHI Scientific Symposium. British Medical Journal Publishing Group, 2020. http://dx.doi.org/10.1136/bmjoq-2020-ihi.1.
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Сорокин, Александр, Alexander Sorokin, Валентина Руцкая e Valentina Ruckaya. "LUPIN AS THE BASE FOR PROTEIN COMPONENT OF FEED MIX FOR POULTRY". In Multifunctional adaptive feed production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2019. http://dx.doi.org/10.33814/mak-2019-21-69-110-115.
Testo completoAbstract (sommario):
The article presents the data of domestic and foreign researchers for feeding of poultry used lupin and its processed products. It’s advisable to use energy-and-protein concentrates made of legumes and cereal grain mixtures to prepare complete feeds. Lupin is one of the main sources of plant protein with unique amino acid composition. In opinion of the majority of researchers lupin containing feeds made according to technic guidance support productivity increasing of poultry growing and improve the quality of the products.
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SKVORCOVA, Lyudmila, e Natal'ya ChURSINA. "Influence of the level of electrolytes in the diets of young quails on their productivity". In Multifunctional adaptive fodder production 29 (77). ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-29-77-196-200.
Testo completoAbstract (sommario):
Increasing or decreasing the sodium level relative to the control does not adversely affect the level of safety of the livestock and the appetite of the birds. At the same time, feeding quails with compound feeds with a sodium level of 0.4 and 0.6% reduces feed costs per unit of production.
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Putra, Dedi Fazriansyah, Mariana, Muchlisin Zainal Abidin e Sanani. "Effect of Various Feeding of Live Feeds on the Growth and Survival Rate of Black Tiger Shrimp Larvae (Penaeus Monodon)". In International Conference on Multidisciplinary Research. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0008883001280132.
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Zverkova, Zinaida. "Practical application of surepitsa cake in the diets of poultry". In Multifunctional adaptive feed production 27 (75). ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-27-75-158-162.
Testo completoAbstract (sommario):
Studies have been conducted on the use of surepny oilcake obtained from different varieties of Brassica rapa L., in the feeding of broiler chickens. The safe norms of its inclusion in the composition of balanced compound feeds have been determined. The enrichment of experimental compound feed with enzyme preparations increases the economic performance of broiler chickens. The oilcake surepny obtained from the seeds of the Brassica rapa L, selection of the All-Russion Williams Fodder Research Institute confirms the effectiveness of cultivation and the negative effect on broiler chickens.
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S.V., Matrosova, Sidorova N.A. e Kuchko T.Yu. "COMPARATIVE CHARACTERISTICS OF THE STATE OF THE JUVENILE SO-IUY MULLET PLANILIZA HAEMATOCHEILA (TEMMINCK & SCHLEGEL, 1845) ACCORDING TO HEMATOLOGICAL INDICATORS". In II INTERNATIONAL SCIENTIFIC AND PRACTICAL CONFERENCE "DEVELOPMENT AND MODERN PROBLEMS OF AQUACULTURE" ("AQUACULTURE 2022" CONFERENCE). DSTU-Print, 2022. http://dx.doi.org/10.23947/aquaculture.2022.77-80.
Testo completoAbstract (sommario):
The article presents an analysis of a comprehensive study of the growth and development indicators of rainbow trout grown on granulated feeds using a plankton microalgae suspension concentrate Chlorella vulgaris (GKO) as a bioadditive. The possibility of using the studied biopreparation in the feeding ration of trout as an active additive with an immunocorrecting effect has been proven. The use of a Chlorella suspension at a concentration of 10 ml / kg increases the survival and resistance of trout jewels, as well as the general strengthening of the immune background of the fish organism.
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Zverkova, Zinaida, e Bella Osipyan. "FEATURES OF THE USE OF BRASSICA RAPA SEEDS IN THE FEEDING OF BROILER-CHICKENS". In Multifunctional adaptive fodder production. ru: Federal Williams Research Center of Forage Production and Agroecology, 2022. http://dx.doi.org/10.33814/mak-2022-28-76-191-197.
Testo completoAbstract (sommario):
In the Federal Scientific Center "VIK im. V. R. Williams” conducted research on the evaluation of new varieties of spring and winter colza Zarya and Nadezhda when growing broiler chickens of the Cobb 500 cross. The control group received compound feed without rapeseed seeds. The first and second experimental groups included 7.5% by weight of mixed fodder native rapeseed seeds of Zarya and Nadezhda varieties, which were used to replace part of soybean meal and sunflower oil. The content of nutrients in mixed feed complied with the regulatory requirements. The oil was balanced in composition: a large amount of monounsaturated, low-saturated fatty acids, a moderate amount of polyunsaturated fatty acids. It has been established that compound feeds with rapeseed seeds do not negatively affect the live weight gain of experimental broiler chickens. On the 39th day, the live weight of chickens in the control, in the first and second experimental groups was 2.250, 2.245 and 2.256 g, respectively. The significance of the difference in this indicator with the control group has not been established (P > 0.05). In the study of blood serum in chickens of the first experimental group, an increased level of bilirubin and the enzyme glutamyltransferase was revealed, which indicates stagnation of bile in the bile ducts (P > 0.01). The efficiency of growing poultry using rapeseed seeds was higher than in the control, which is associated with a decrease in feed costs for obtaining meat products and a lower cost of experimental feed.
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MengYao, Tong, e Li FangGang. "The Quality Experience Feedback in Nuclear Fuel Manufacture". In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81374.
Testo completoAbstract (sommario):
Experience feedback refers to the timely information collection, transformation, analysis, processing and summary, when some good experience or occasional problems appeared during the manufacturing process. In the manufacturing process of nuclear fuel, CNNC JianZhong Nuclear Fuel Assembly Co., Ltd (CJNF) established a comprehensive experience feedback system, and consolidated experience feedback processing flow. Using classification and gradation to collect, filter, organize and use information. CJNF feeds back some quality problems in fuel assembly manufacture, through the analysis of causes and the implementation of measures to avoid the occurrence of similar problems. Meantime, feeding back and sharing good practical experience in manufacturing and management process, it is benefit to pass on experience and learn from each other. The experience feedback of CJNF is the solid foundation of quality management system’s operation and improvement.
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Ünlü, Elif Işılay, e Ahmet Çınar. "Lesion Detection on Skin Images Using Improved U-Net". In International Students Science Congress. Izmir International Guest Student Association, 2021. http://dx.doi.org/10.52460/issc.2021.022.
Testo completoAbstract (sommario):
The fate of transgenic DNA (tDNA) and protein of feeds from Genetically Modified organisms (GMOs) in animals has been an important topic since their commercialization in 1996. Several studies have investigated about risks of horizontal gene transfer (HGT) of tDNA and proteins to bacteria or animal cells/tissues, however, the reported data is at times controversial. Earlier reports showed that tDNA fragments or protein derived from GM plants have not been detected in tissues, fluids, or edible products of farm animals. Other researchers have come out to demonstrate that there is the possibility of small fragments leaking out into the animal tissues, fluids and organs. This motivated us to update our knowledge about these concerns. Therefore, this review aimed at assessing the likely transfer and accumulation of tDNA/ proteins from transgenic feeds to animal (ruminants and non-ruminants) samples through evaluating the available experimental scientific published studies. This study has found out that the tDNA or protein is not completely degraded during feed processing and digestion in the Gastro-Intestinal Tract (GIT). In large ruminants (Cattle), tDNA fragments/protein have been detected in the GIT digesta, ruminal fluid and feces. In small ruminants (Goats), traces of tDNA/proteins have been detected in the GIT digesta, blood, milk, liver, kidney, heart and muscle. In pigs, they have been detected in blood, spleen, liver kidney and in the GIT digesta. In poultry, traces have been seen in blood, liver and GIT digesta but not in meat and Eggs. Regardless of some studies that have shown the transfer of tDNA/protein fragments to animal samples, we cannot base on these few studies to give a piece of general evidence about their transfer into tissues/fluids and organs of livestock animals. However, this study clearly shows possible transfer, hence intensive and authentic research on GM crops should be done before they are allowed for commercial use, studying issues like the fate of tDNA or proteins and the effect of feeding GM feeds to livestock.
Rapporti di organizzazioni sul tema "Geometridae Feeding and feeds"
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Mitchell, Brian G., Amir Neori, Charles Yarish, D. Allen Davis, Tzachi Samocha e Lior Guttman. The use of aquaculture effluents in spray culture for the production of high protein macroalgae for shrimp aqua-feeds. United States Department of Agriculture, gennaio 2013. http://dx.doi.org/10.32747/2013.7597934.bard.
Testo completoAbstract (sommario):
The FAO has projected a doubling in world demand for seafood during the 21 ed from aquaculture of marine fish and shrimps fed primarily on fishmeal-based aquafeeds. However, current practices of high intensity monoculture of shrimp in coastal ponds and fish in offshore pens have been strongly criticized as being ecologically and socially unsustainable. This view derives from un- checked eutrophication of coastal marine ecosystems from fish farm effluents, and the destruction of coastal estuarine ecosystems by shrimp farm constructions, plus aquaculture’s reliance on wild-caught small fish - which are excellent food for humans, but instead are rendered into fishmeal and fish oil for formulating aquafeeds. Fishmeal-sparing and waste- reduction aquafeeds can only delay the time when fed aquaculture product are priced out of affordability for most consumers. Additionally, replacement of fishmeal protein and fish oil by terrestrial plant sources such as soybean meal and oil directly raises food costs for human communities in developing nations. New formulations incorporating sustainably-produced marine algal proteins and oils are growing in acceptance as viable and practical alternatives. This BARD collaborative research project investigated a sustainable water-sparing spray/drip culture method for producing high-protein marine macrophyte meals for incorporation into marine shrimp and fish diets. The spray culture work was conducted at laboratory-scale in the USA (UCSD-SIO) using selected Gracilariaand Ulvastrains isolated and supplied by UCONN, and outdoors at pilot-scale in Israel (IOLR-NCM) using local strains of Ulvasp., and nitrogen/phosphorus-enriched fish farm effluent to fertilize the spray cultures and produce seaweed biomass and meals containing up to 27% raw protein (dry weight content). Auburn University (USA) in consultation with TAMUS (USA) used the IOLR meals to formulate diets and conduct marine shrimp feeding trials, which resulted in mixed outcomes, indicating further work was needed to chemically identify and remove anti-nutritional elements present in the IOLR-produced seaweed meals.