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Ecology and Evolutionary Biology Commons™
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Articles 181 - 185 of 185
Full-Text Articles in Ecology and Evolutionary Biology
Equine Behavior Problems In Relation To Humane Management, Katherine A. Houpt
Equine Behavior Problems In Relation To Humane Management, Katherine A. Houpt
Equines Collection
The behavior problems of horses are frequently related to management practices. Behaviors that are termed stall vices appear to be either stereotyped behaviors that occur in reaction to stress, or patterns that emerge when natural behaviors such as grazing are prevented. The behavior cases presented to the New York State College of Veterinary Medicine, Cornell University, were tabulated: 27% were stall vices and 27% were some form of aggression. The stall vices were circling, digging, kicking the stall, chewing wood, swallowing air or self-mutilation. Management of horses on pasture rather than in stalls prevents the development of many of these …
The Social Behavior Of Brown Bears At Mcneil River, Alaska, Allan L. Egbert
The Social Behavior Of Brown Bears At Mcneil River, Alaska, Allan L. Egbert
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The social behavior of brown bears (Ursus arctos) was studied during the summers of 1972 and 1973 as bears fished for salmon at McNeil River, Alaska. Study objectives were to determine behavioral characteristics of bears in relation to sex and age, changes in social behavior over a 40-day long fishing season, social and environmental parameters correlated with the occurrence of behavior, and to test the hypothesis that brown bears modify social behavior in a feeding aggregation to exploit a resource limited in time and space.
Over one-half of the agonistic interactions consisted of passive deferrals. Encounters that included …
Sheep Behavior And Vulnerability To Coyote Predation, Ernest Albert Gluesing
Sheep Behavior And Vulnerability To Coyote Predation, Ernest Albert Gluesing
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study examined the activity patterns and social relation ships between individuals in a large herd of domestic sheep (Ovis aries) in an effort to determine if behavioral characteristics predisposed certain individuals to coyote (Canis latrans) predation.
The research was conducted on the Cook Ranch near Florence, Montana, from March through September of 1975. Data were collected from a herd of 627 ewes and 1082 lambs, each individually identifiable. A random sample of 44 ewes and their 75 lambs were intensively studied over a 16-wk period to establish activity budgets and the relationships between sheep activity …
Trout Movements In A Small Mountain Stream, Thomas Mark Twedt
Trout Movements In A Small Mountain Stream, Thomas Mark Twedt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Five groups of 400 hatchery rainbow trout, (Salmo gairdneri), were stocked in a small, mountain stream at 3-week intervals from June to September, 1972. A fish trap captured any fish moving out of a 500 m study section.
Fish began moving at high levels during the first day of each stocking and continued at high rates for 5-8 days (Early Phase), after which movement decreased to low levels for 6-9 days (Late Phase). Early Phase fish moved primarily at night, possibly due to their disoriented state and high subjectivity to stream conditions. Fish moving during Late Phase did …
Sub-Aversive Response Contingent Foot Shock As A Positive Reinforcer, Robert Lea Fulwiler
Sub-Aversive Response Contingent Foot Shock As A Positive Reinforcer, Robert Lea Fulwiler
All Master's Theses
Forty-eight rats were divided into 8 groups; four were maintained under normal conditions and the other four under sensory deprivation and tested at o, 3, 6, and 9 days after condition institution. The response was placing the head through a hole in the operant chamber and the stimulus (0, 1.2, 4, or 12 Vac) was contingent upon the response. Analysis ot variance disclosed significant differences (p<.01) between the deprived and the non-deprived groups at days 6 and 9; and a significant interaction between deprivation condition and time of test. No differences were shown between the stimulus intensities indicating that the stimulus did not have a reinforcing effect.