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 401 for “"Animal Sciences"”.
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An exploration of the background characteristics and interests of University of Illinois Department of Animal Sciences freshman
… This study sought to explore the demographics, animal interests, and future career aspirations of incoming students to the department of animal sciences at the University of Illinois. The investigator conducted a questionnaire that was distributed to students who were current freshmen in the …
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A new passive surface water flux meter for simultaneous measurement of contaminant and water fluxes in streams and rivers
… was evaluated in a stream network at the Purdue Animal Sciences Research and Education Center (ASREC). Sampling was focused on the steroid hormones and pesticides, which are present at trace concentrations in the stream network as a result of agricultural activity. Estimates of contaminant flow …
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Using Light-Level Geolocation to Investigate the Carry-Over Effects of Long-Distance Migration on the Reproductive Success of Dunlin (Calidris Alpina Hudsonia)
Avian migration strategies can have lasting effects on individual fitness in subsequent seasons. These carry-over effects are difficult to study in migratory species because of the geographical separation between breeding and non-breeding sites. I used light-level geolocation to examine, for the …
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Describing the Ionoregulatory Changes that Underlie Cold Acclimation in Drosophila Melanogaster
At low temperatures Drosophila lose the ability to regulate ion and water balance across the gut leading to a lethal accumulation of K+ in the haemolymph (hyperkalemia). Cold-acclimation can mitigate these ion imbalances, but the physiological mechanisms that facilitate this process are still not …
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Effect of sward height and concentrate supplementation on forage dry matter intake, digestibility and grazing time of spring-calving beef cows
To establish the effect of sward height (SH) and concentrate supplementation on performance of grazing cattle, twenty-four cross bred Angus beef cow-calves were randomly assigned to two SH treatments (4--8 or 8--11 cm) with three supplement levels: 6.24, 3.12 or 0 kg/d. The study was conducted in …
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Effect of feeding calcium propionate on carcass composition, and productive performance of male broilers
Male broilers were fed ad libitum a control diet and diets with 1.5% and 2.7% calcium propionate (CaP). Broiler diets were supplemented with CaP for the first 2,4,6, or 8-week intervals. After being fed CaP for the previous mentioned times the broilers received a control diet for the remainder of …
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Productive performance and fertility of broiler breeders maintained in commercial colony cages and on the conventional floors
A trial with four replicates was conducted to compare performance and fertility of naturally mated broiler breeders maintained on litter floor versus their counterparts maintained in two tiered colony cages. Cage maintained hens with restricted feeding weighed less (P 0.05) was found in egg weights …
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Comparison of broiler breeder production and fertility in a colony cage system with two different floors versus a slat-floor system
Two separate trials were conducted to compare egg production, egg weight, shell thickness, albumin height, fertility, and mortality of naturally mated broiler breeders maintained on either a slat and litter floor or in two tiered colony cages. In the first trial there was no difference (P > 0.05) …
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Effects of Dietary Immunomodulation on Parasite Load in Commercial Crossbred Lambs
Multidrug resistant gastrointestinal nematodes have left sheep producers with little options to control the detrimental effects of parasitism on their flocks. Immunomodulation has been used in many autoimmune diseases in an effort to downregulate the immune system and alleviate pathology. However, …
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Influence of Weight Loss on Metabolic and Mitochondrial Function in the Mature Horse
Obesity causes a multitude of metabolic issues in the horse, yet stepwise alterations in glucose and lipid metabolism, mitochondrial capacity and oxidant status during weight loss have yet to be analyzed. Skeletal muscle contains subsarcolemmal (SSM) and interfibrillar (IFM) mitochondria, which …
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The Effects of Artificial Photoperiod on Age at Puberty in Fall-born Ewe Lambs
… of the rams. Progesterone was assayed, on all animals at four time points, using a radioimmunoassay. Plasma melatonin was assayed, in a subset of both treated and control females in replicate I prior to light termination, using an ELISA method. At light termination; treated females, in …
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Practical Strategies to Maximize Cockatiel Health and Broiler Chicken Performance
There are various methods of processing avian diets. However, the two common methods of processing include grinding, batching, mixing, and feeding the resultant mash that is not thermally processed, extrusion processing, baking, and steam conditioning and pelleting. The method of processing …
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Effects of Lipopolysaccharide Induced Inflammatory Response on Early Embryo Survival in Ewes
Early pregnant ewes, 5 or 6 day post coitus (dpc) were used as a model to study early embryonic loss via gram-negative bacterial infections, such as mastitis. Ewes 5/6 dpc were injected with a gram-negative bacteria cell wall component, lipopolysaccharide (LPS) or tumor necrosis factor-alpha …
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