Piscivorous avifauna on Yellowstone Lake, Yellowstone National Park
Davenport MB. 1974. Piscivorous avifauna on Yellowstone Lake, Yellowstone National Park. Montana State University. Bozeman, MT
In a natural area, piscivorous animals have priority over humans in the use of the fish resource. Thus it is necessary to understand the needs of the animals in order to keep human use to a non-conflicting level. This study was directed toward determining the consumption of cutthroat trout by the 13 major piscivorous species of avifauna on Yellowstone Lake, Yellowstone National Park, Wyoming. Population numbers and distribution were determined by censuses conducted during the summers of 1973 and 1974. Food habit information was obtained by field observations and a literature review. Individual pelicans were found to consume an average of 1.9 lb cutthroat trout/day, ospreys 0.88 lb/day, mergansers 0.9 lb/day, grebes 0.31 lb/day, goldeneyes 0.005 lb/day, buffleheads 0.01 lb/day, eagles 0.09 lb/day, gulls 0.34 lb/day, loons 1,19 lb/day, cormorants 0.003 lb/day, terns 0.7 lb/day, and kingfishers 0.3 lb/day.
- Type
- Published Report
- Authors
- Davenport, Margaret
- Date of Issue
- 1974-12
- Publisher
- Montana State University
- Units
- GLAC , GRTE , YELL
- Keywords
- American White Pelican (Pelecanus erythrorhynchos), Animal Studies, Bald Eagle (Haliaeetus leucocephalus), Barrow's goldeneye (Glaucionetta islandica), belted kingfisher (Megaceryle alcyon), Birds, bufflehead (Charitonetta albeola), Caspian tern (Stern caspia), Common Loon (Gavia immer), common merganser (Mergus merganser), Cutthroat Trout (Oncorhynchus clarki), Distribution, Double-Crested Cormorant (Phalacrocorax auritus), Eagles (Accipitridae), Feeding, Fish, Food, grebes, gull (Larus californicus), Nutrition, Osprey (Pandion haliaetus), piscivorous birds, Population Density, Predation, Raptors, Stomach Contents, Trout ( Oncorhynchusnidae), Water Birds, Yellowstone Lake