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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 138 for “"egg production"”.
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An economic analysis of commercial egg production
… useful in farm management plans by commercial egg producers and those interested in the poultry industry. The study was in two phases. Egg production functions were estimated for flocks with particular combinations of management practices and equipment. Analysis of variance was used to …
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Optimum Plans for Coordinated Egg Production and Marketing in Southwestern Illinois
Made available in DSpace on 2014-12-08T23:37:32Z (GMT). No. of bitstreams: 1 6500869.pdf: 9416287 bytes, checksum: 3b7d5e0c25b57367fa62f3c888311289 (MD5) Previous issue date: 1964
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Nutritional regulation of egg production of Calanus Finmarchicus in the North Atlantic
… used to study how food quality influences the egg production of Calanus finmarchicus feeding on natural planktonic diets. Food quality was expressed in terms of carbon (C), nitrogen (N), and the essential fatty acids eicosapentaenoic acid (EPA; 20:5(n-3)) and docosahexaenoic acid (DHA; …
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Associations of egg production with the major histocompatibility complex in broiler breeder hens
… objective was to determine if the MHC affects reproduction of non-congenic broiler breeder hens. Genomic DNA was isolated from 35 hens. Restriction fragment length polymorphism (RFLP) analysis was performed on each sample, using a chicken class II MHC probe (Xu et al. 1989). Restriction …
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The Effect of Selection on Egg Production in Single Comb White Leghorn Fowl
The practical value of any system of breeding for egg production must be demonstrated first to be appreciated by the average poultryman. High egg yield has been found by several workers to be due to the combined influences of early sexual maturity, non-winter pause, high intensity, non-broodiness …
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Factors influencing the induction of diapausing egg production in the calanoid copepod Diaptomus leptopus
… and temperature upon the induction of diapausing egg production in a single species of copepod found in habitats that differ in permanence. Field studies of four populations of Diaptomus leptopus carried out from 1995 to 1997 reveal quite different seasonal patterns in the production of …
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Enhancing competitiveness of small scale poultry egg production farm in the Democratic Republic of Congo
… Animal protein in the form of chicken meat and eggs are relatively inexpensive and offer an opportunity for entry and differentiation in a markets located in DR Congo’s largest cities of Kinshasa and Kananga. This thesis uses the case of Z-CO Farm in DR Congo to explore the strategic …
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Improving Opportunities for Small Flock Egg Production and Proper Evaluation of Glucanase for Commercial Poultry
Consumers of pastured hen eggs have justified paying an associated premium price because they perceive animal welfare, sustainability, and nutrition are enhanced compared to conventionally produced eggs. The objective of Study 1 (Chapter 2) was to implement practical management strategies to …
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Economic Analysis of the Use of Labor and Equipment in Egg Production on Illinois Farms
Made available in DSpace on 2014-12-04T21:48:02Z (GMT). No. of bitstreams: 1 0020892.pdf: 14266023 bytes, checksum: 27d2da640b670bddcbd0c80c9322697d (MD5) Previous issue date: 1957
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Modelling the Interaction of Fishing with Size Structure, Dimorphism, and Egg Production of Clawed Lobsters
… decisions are often made in order to maximize egg production and recruitment or to preserve specific size classes to increase reproductive output. Consequences of these strategies could include variation from a natural size structure of the population, exaggerated sexual dimorphism, skewed sex …
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Calcium Dynamics Affecting Egg Production, Skeletal Integrity, and Egg Coloration in Ring-necked Pheasants (Phasianus colchicus)
… of this species, which produces 7-15 eggs per clutch. They may renest up to 5 times per breeding season on a diet low in calcium. The first chapter examines egg production in laying hens on 7 different diets from 0.19-4.47% calcium in the absence of calcium loading. Calcium-loaded …
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A Biometrical and Genetic Study of Tribolium Egg Production Curves as A Model for Lactation Curves
A considerable amount of research has been conducted to find a mathematical equation that describes the nonlinear lactation curve of dairy cattle. The most common method to obtain parameter estimates for these mathematical equations has been to transform the nonlinear function to its linear …
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Male Influence on the Neuro-Endocrine Control of Egg Production in the Female Milkweed Bug, Oncopeltus fasciatus - Dallas
… to determine whether mating has any effect on egg reproduction. Virgin females were maintained under the three following conditions: 1) completely isolated from males, 2) visual contact with males through screening which prevented mating, and 3) physical access to one or two males at all times. …
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Effects of feeding sprouted Sorghum (Sorghum bicolor) diets fortified with exogenous enzymes on egg production of red and white amberlink layers
… diets fortified with exogenous enzymes on egg production by Red and White Amberlink layers. Egg production by 216 Red and White Amberlink layers which were 16 weeks into production was evaluated over a six-week period. The layers were housed in a naturally ventilated battery house, placed …
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Assessment of behaviour and egg production of laying hens kept in cages and floor systems on a commercial farm in South Africa
… use of conventional cages in commercial layer production systems. Nonetheless, the assessment of alternative methods that can ensure the hen's ability to perform different behaviours while simultaneously enhancing productivity and economic efficiency on the farm remains incomplete. The current …
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Effect of juvenile dietary regime and time of beak trimming on pullet growth, subsequent egg production and incidence of prolapse in Leghorns
… were housed in laying cages for 24 weeks of egg production. One-half of the birds were provided with high light intensity ranging from 20 to 70 lux and one-half with low intensity from 2.5 to 22 lux. Cumulative feed intake through 20 weeks of age for the CHE fed birds was significantly lower …
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TALLOW FOR LAYING HENS
… of animal tallow ranging from 0 to 10%. Percent egg production and egg mass were not significantly affected by tallow. Body weight was significantly increased by 2% tallow was maximum at 6%. Addition of up to 6% fat improved feed conversion without adversely affecting other production …
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Evaluation of feeding different sources and levels of distillers dried grains with solubles (DDGS) with corn and soybean hulls in non-feed-withdrawal molt programs for laying hens
… fed the DDGS diets. Hens fed the C:SH diet had egg production near 0% during the last three weeks of the molt period. Hens on the other treatments did not have egg production below 8-10% during the molt period, and the reduction in egg production varied among DDGS sources. The darkest brown DDGS …
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Effects of Dieldrin on Reproduction of Penned Hen Pheasants
… to determine the effects of dieldrin on reproduction of the hen pheasant were conducted for two breeding seasons, Hen pheasants were caged individually and administered encapsulated dieldrin at weekly intervals. The first season, treatment levels were 0, 2 or 4 mg of dieldrin per hen per …
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