Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
Relationships Among Birds, Willows, And Native Ungulates In And Around Northern Yellowstone National Park, Sally Graves Jackson
Relationships Among Birds, Willows, And Native Ungulates In And Around Northern Yellowstone National Park, Sally Graves Jackson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Although the impacts of livestock and human activities on riparian zones and associated wildlife have been well documented, little is known about the impacts that browsing by large native ungulates such as elk and moose may have. In the northern Yellowstone area, some willow stands experience intense browsing by elk and moose whereas others experience medium or very low amounts of browsing. The objectives of this study were (1) to compare the species and densities of birds among willow stands that have experienced different intensities of browsing by native ungulates, (2) to measure the relationship between five species of birds …
Information Content Of Prey Odor Plumes: What Do Foraging Leach's Storm Petrels Know?, Larry Clark, Pankaj Shah
Information Content Of Prey Odor Plumes: What Do Foraging Leach's Storm Petrels Know?, Larry Clark, Pankaj Shah
Larry Clark
Electrophysiological responses to odor have been recorded for concen trations as low as 0.01 ppm for Manx shearwaters Puffinus puffinus and Black-footed Albatrosses Diomedea nigripes, indicating that relative to most birds, procellariiforms have a keen sense of smell (Wenzel and Sieck 1972, cf.clark 1991; Clark and Smeraski 1990; Clark and Mason 1989). Such acuity is not unexpected, given the extensive development of the olfactory anatomy of these species (Bang and Wenzel 1986). Field observations indi cate that Procellariiformes use their sense of smell to locate food (Grubb 1972; Hutchison and Wenzel 1980; Lequette, Verheyden and Jouventin 1989). -_ However, it …
Nonlethal Repellents: The Development Of Cost-Effective, Practical Solutions To Agricultural And Industrial Problems, Russell Mason, Larry Clark
Nonlethal Repellents: The Development Of Cost-Effective, Practical Solutions To Agricultural And Industrial Problems, Russell Mason, Larry Clark
Larry Clark
Repellents substances and devices cause pest species to avoid otherwise attractive or palatable materials. For birds, repellents can be visual, auditory, pyrotechnic, tactile, chemosensory, physiologic, or physical. Here, we consider chemical agents only. Few substances arc registered with the U.S. Environmental Protection Agency (EPA), and thus legally available for use. This lack of available bird repellent technology reflects the small demonstrable economic impact of many agricultural bird damage problems. Accurate information about damage and market size is virtually nonexistent, and private companies are reluctant to invest resources in the unknown. To successfully commercialize new repellents, clearly lucrative markets must be …
Capsaicin Effects On Consumption Of Food By Cedar Waxwings And House Finches., Donald Norman, Russell Mason, Larry Clark
Capsaicin Effects On Consumption Of Food By Cedar Waxwings And House Finches., Donald Norman, Russell Mason, Larry Clark
Larry Clark
Capsaicin effects on consumption of food by Cedar Waxwings and House Finches. Capsaicinoids (e.g., N-vanillyl-n-nonamide. norcapsaicin, nordihydrocapsaicin, capsaicin, dihydrocapsaicin, homocapsaicin, homodihydrocapsaicin; Hoffman 1983) are aromatic am ides and the pungent principles in Capsicum peppers. Although these substances are strong chemical irritants for most mammals (e.g.. Rozin et a!. 1979), the available data suggest that they are inoffensive to some birds. For example. European Starlings (Sturn us vulgaris) and Rock Doves (Columba Iivia) are unresponsive to these compounds, even when con centrations greatly exceed those which mammals avoid (Szolcsanyi et al. 1986; Mason et a!.. in press).
Birds Of A Great Basin Sagebrush Habitat In East-Central Nevada, United States Department Of Agriculture, Forest Service
Birds Of A Great Basin Sagebrush Habitat In East-Central Nevada, United States Department Of Agriculture, Forest Service
Wildlife Conservation and Management
Breeding bird populations ranged from 3.35 to 3.48 individuals/ha over a 3-year study conducted from 1981 to 1983. Brewer's sparrows, sage sparrows, sage thrashers, and black-throated sparrows were numerically dominant. Horned larks and western meadowlarks were less common. Results are compared with bird populations in Great Basin sagebrush habitats elsewhere in the United States.