Global ETD Search
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 26 for “"egg quality"”.
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Egg quality and fecundity in rainbow trout: the determining factors and mechanisms of control
… the factors involved in the determination of egg quality and fecundity in farmed stocks of rainbow trout ( Salmo gairdneri R) • Measurements of egg quality, ie. percentage survivals of eggs and fry, from the production batches of eggs of seven fish farms, showed mean survivals of 70% to eying …
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Reproductive Soundness and Egg Quality in Chickens Selected for Low and High Antibody Response
… responses in reproductive soundness and egg quality resulting from that selection. Forty-five hens and 25 roosters from each antibody line were used. In hens, commencement and intensity of lay, and egg quality, were analyzed; in both sexes, length of fertility was considered. Hens and …
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Effect of feed withdrawal and strain on laying performance and egg quality of white and brown Hy-Line layers
… withdrawal and strain on laying performance and egg quality of White and Brown Hy-line layers. Fifty four hens for each strain (White Hy-Line and Brown Hy-line) aged 18 weeks (point of laying stage) were used in the investigation. Feed withdrawal had no effect (P>0.05) on laying performance, …
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The Effects of a Single Strain Bacillus subtilis DFM on pullet performance, laying hen performance, and egg quality when fed from day of hatch until 70 weeks
… on pullet performance, layer performance, and egg quality when fed from day of hatch until 70 weeks of age. In total, 576 Hy-Line W-36 laying hen pullets were randomly divided between two treatments (Control and DFM) on day of hatch across 12 cages for each of the treatments and maintained on …
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Effects of dietary fats on reproductive performance , egg quality, fatty acid composition of tissuse and Yolk and prostaglandin levels of embryonic tissues in Japanese Quail (Coturnix coturnix japonica)
… of dietary fats on reproductive performance, egg quality, fatty acid composition of tissues and egg yolk, and prostaglandin levels in embryonic tissues in Japanese quail (Coturnix, coturnix japonica) were evaluated. The addition of 5.0% chicken fat (CHX), hydrogenated soybean oil (HSBO), …
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The Acute and Chronic Effects of a Cyclic Heat Stress on 24 to 28 Week Old Laying Hens on Performance, Egg Quality, Apparent Metabolizable Energy, and Blood Chemistry
… laying hens are heavily selected for increased egg production, but little selection has occurred for resistance to extreme temperatures. The objective of the experiment was to determine the effects of a daily cyclic heat stress (HS) on performance, body temperature, egg quality, nitrogen …
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INVESTIGATION OF GREAT LAKES LAKE WHITEFISH EGG FERTILITY AND HEALTH
… split-clutch design comparing untreated eggs with iodophor-disinfected eggs. Embryos were incubated under controlled conditions; I quantified fertilization and eye-up and screened adults, gametes, and eggs for bacterial pathogens. Fertilization differed significantly by site, with Little …
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STUDIES IN OOCYTES FROM THREE MAMMALIAN SPECIES DEMONSTRATE THAT MEIOTIC KINETOCHORES ARE COMPOSED OF PREVIOUSLY UNIDENTIFIED SUBDOMAINS AND REVEAL TWO NOVEL MECHANISMS BEHIND THE MATERNAL-AGE EFFECT IN HUMANS
Poor egg quality is the leading cause of pregnancy loss and Down’s syndrome. While even eggs in young women frequently contain an incorrect number of chromosomes and are therefore unlikely to give rise to a viable pregnancy, the incidence of chromosomally abnormal eggs increases strikingly with …
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The Effects of Beak Trimming and Claw Reduction on Growing and Early Laying Parameters, Fearfulness, and Heterophil to Lymphocyte Ratios
… RC birds, but was for BT birds throughout lay. Egg production, egg quality, and mortality were not affected by either treatment.
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Sibling rivalry in black-legged kittiwakes (Rissa tridactyla)
… care. This competition is mainly manifested by begging or food hoarding and in only few species, as in the black-legged kittiwake (Rissa tridactyla) direct aggression between the offspring is present.. It has been proposed that the degree of asymmetries between the members of a brood influence …
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Neuroendocrine Mechanisms Involved in the Control of Ovarian Development and Vitellogenesis in the Rainbow Trout
… manipulation, for the improvement of egg quality and alteration of spawning time, in the farming of salmonid fish are discussed.
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Effects of dubbing on the production and behavior of chickens maintained in different environments from 20 to 72 weeks of age
Purpose of this study was to (1) compare egg production of dubbed and non-dubbed females, (2) determine the social relationships between and among dubbed and non-dubbed females in large and small flocks maintained under various housing conditions, and (3) determined egg quality, sexual maturity, …
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Experimental studies on the reproductive biology of the Waterstrider, Gerris buenoi (Heteroptera: Gerridae)
… in the field. Over a 20 fold range of egg production rates in control enclosures, food addition and interspecific competitor exclusion consistently increased egg production. The magnitude of these effects varied up to four fold among dates. Predators consistently reduced gerrid …
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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
… as well as body condition scores. Body weights, egg production, and feed intake were recorded on weekly intervals. Eggs were collected daily between the hours of 8:00 am and 10:00 am in all housing systems to determine egg production and egg quality. Behavioural observations were done using a …
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Changing Fecundity and Reproductive Output in Females of a Chesapeake Bay Population of Blue Crab, <i>Callinectes sapidus</i>
… examine the concentrations of lipid fractions in eggs.</p> <p>This study indicated that the size-fecundity relationship is absent or very weak. Fecundity estimates indicate that individual female fecundity has decreased by an order of magnitude from previously reported values. Egg production …
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Modeling Relationships Among Affective Measures of Food Choice: Acceptance, Emotions And Satisfaction
… series of consumer studies were conducted using eggs as a test product. First, the extent to which critical product attributes contribute to the satisfaction of quality requirements and purchase intent was determined using Kano modeling concepts. The emotional profile of the product was then …
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Factors Affecting Consumers Preferences for Specialty Eggs in Canada
… increase in the consumer demand for specialty eggs in Canada. This egg consumption trend has reflected the fact that current egg consumers are not only content about eggs as a staple, but also demand egg products with enhanced attributes, such as nutrition, health, animal welfare and food …
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Pengaruh pemberian kombinasi tepung kayambang (Salvinea molesta) dan limbah terfermentasi dalam ransum terhadap kualitas telur itik
… kerabang telur sebesar 0,48 mm. ENGLISH: The quality of the duck’s eggs is influenced by the nutrition of the given food. Food with high nutrition needs a lot of money to spend. With this kind of situation, the farmers need another alternative which is quite easy to get without decreasing the …
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