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Full-Text Articles in Life Sciences
Naive Prey Versus Nonnative Predators: A Role For Behavior In Endangered Species Conservation, Stephanie A. Kraft
Naive Prey Versus Nonnative Predators: A Role For Behavior In Endangered Species Conservation, Stephanie A. Kraft
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Fish are one of the most imperiled groups of vertebrates worldwide. Threats to fish fall into one of four general categories: physical habitat loss or degradation, chemical pollution, overfishing, and nonnative species introductions. Nonnative predatory fish often have a devastating impact on native prey, especially with endemic fish, whose restricted distribution and often limited evolutionary history with predators make them particularly susceptible to nonnative predators. One reason nonnative fish are often so efficient predators is that the native fish do not recognize the predator as a threat. Although many studies have examined the role of predator odor recognition, no fish …
The Foraging Behavior Of A Solitary Bee, Diadasia Nigrifrons (Hymenoptera: Anthophoridae) On Sidalcea Oregana, Ssp. Oregana, Kimberly A. Kuta
The Foraging Behavior Of A Solitary Bee, Diadasia Nigrifrons (Hymenoptera: Anthophoridae) On Sidalcea Oregana, Ssp. Oregana, Kimberly A. Kuta
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Foraging studies have established that bees typically obey a set of movement rules when foraging on vertical inflorescences: they begin foraging at the bottom of an inflorescence, move upward, visit a fraction of the available flowers, and leave before reaching the top of the inflorescence. These behaviors are purported to maximize bee foraging efficiency by concentrating their efforts on the most rewarding flowers and minimizing flower revisits. Bees also increase their efficiency by selecting inflorescences with many flowers, visiting more flowers per inflorescence, and remaining in resource-rich areas. To test these hypotheses on plants with more complicated flower arrangements, I …
On The Behavioral Responses Of Free Uinta Ground Squirrels To Trapping, David F. Balph
On The Behavioral Responses Of Free Uinta Ground Squirrels To Trapping, David F. Balph
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Biologists often trap animals to obtain information on them. If trapping is selective toward some animals, the information may be inaccurate. Most mammalogists know or suspect that their trapping techniques (reviewed by Hayne, 1949; and Stickel, 1954) contain sources of bias. Since trapping remains the only feasible way to obtain information on many animals, researchers have tried to discover sources of sampling error and refine their techniques. They have found that one major source of difficulty may lie in the behavior of animals. Individual animals seem to respond differently to trapping, both initially and through learning (Geis, 1955; Crowcroft and …