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 13 of 13 for “"Rearing Environment"”.
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Effect of rearing environment and environmental enrichment on behavior and neural development in young pigs
… crossbred pigs were housed in either a complex environment (CE) or a simple environment (SE) for 9.5 weeks. The SE consisted of two pigs, in 1.22 x 1.22-m pens in a closed building. The CE consisted of 12 pigs in an outdoor pen with straw bedding, daily petting by people and a variety of objects …
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METHYLPHENIDATE TREATMENT AND REARING ENVIRONMENT: EFFECTS ON THE DOPAMINE SYSTEM AND VULNERABILITY TO SUBSTANCE ABUSE IN ANIMAL MODELS
… vulnerability to substance abuse is early rearing environment, as children raised in negative environments are more likely to develop substance abuse disorders. These studies examined the interaction of environment and methylphenidate on the dopamine system and vulnerability to cocaine and …
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Effect of sire line and rearing environment on the growth performance and carcass characteristics of growing-finishing pigs
The effects of sire line and rearing environment on the growth performance and carcass characteristics of growing-finishing pigs were evaluated using 208 barrows from 2 purebred sire lines. The study was conducted as a randomized complete block design (blocking factor was the day of start of test) …
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Corticosteroid receptor dynamics and smolting in hatchery-reared and wild coho salmon (Oncorhynchus kisutch)
… examined to determine what effect smolting and rearing environment had on gill tissue sensitivity to cortisol. CR concentration and affinity were found to change seasonally with the increases in gill Na+K+ATPase activity and the development of saltwater tolerance. At times of the year when fish …
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Socialization and problem-solving in domestic cats (Felis catus)
… an animal’s socialization towards humans and rearing environment can enhance their problem-solving ability. According to the social intelligence hypothesis, which states that intelligence evolved due to complex social environments, an animal’s social life should result in higher cognitive …
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A study of one aspect of attachment behavior: home reared versus day care infants' reaction to strangers
… reared infant when they were placed in a strage environment. This assertion was based on the ethological-evolutionists theory which maintains that the rearing environment cannot alter significantly from that environment of evolutionary adaptiveness if a secure mother-child attachment is to be …
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Early Life History and Stock Discrimination of Kokanee Salmon (Oncorhynchus nerka) in an Alpine Lake Environment
… and how it interacts with unique features in its rearing environment. With my research I described the early life history of kokanee salmon that spawn in the lake’s main tributary, Gold Creek, and proposed a framework to determine the natal origin of spawning adults. Monitoring in the spring of …
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Effects of temperature and density on the facial malformation of hatchery-reared cisco, Coregonus artedi
… artedi</em>, are highly sensitive to environmental variability which likely contributes to the speciation within the Great Lakes cisco clade. Hatcheries are trying to supplement cisco due to population declines. However, hatchery-reared cisco develop flat, subterminal snouts in …
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Environmental differences in the microbiome and exposure to the emerging fungal pathogen, Emydomyces testavorans, in conservation rearing and release programs for the western pond turtle (Actinemys marmorata)
Artificial animal environments, such as human-managed conservation rearing programs, represent an extreme change in lifestyle for many animal species that may be accompanied by unintended alterations to host microbiota and immune function. It is unknown if the management practices of built …
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Psychobiological Mechanisms of Aggression in Youth
… [MHPG]) and characteristics of the rearing environment play in different expressions of aggression (i.e., hostile and instrumental). It was predicted that higher concentrations of MHPG would be related to increased self-reports of aggressive behavior, especially hostile forms, while …
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Roles of dietary antioxidants and oxidative stress in mediating fitness related traits in birds
… effects due to egg quality from those of rearing environment. Chicks from [alpha]-tocopherol treated egg parents were smaller on day three, than control chicks. However, chicks from [alpha]-tocopherol eggs grew faster than controls, and by day 14 there was no difference in mass. The …
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Unravelling the ecological trade-offs in behavioural and physiological sexual traits
… temporally and spatially heterogeneous environments throughout their lives. Therefore, individuals that are able to plastically adjust their behaviour to the current environment, are able to maximise their fitness. These behavioural adjustments are particularly important where there are …