| Abstract: | Life-history organization of the cutthroat trout (Oncorhynchus clarki) may be viewed at various levels, including species, subspecies, metapopulation, population, or individual. Each level varies in spatial scale and temporal persistence, and components at each level continually change with changes in environment. Cutthroat trout are widely distributed throughout the western United States, occurring in such diverse environments as coastal rivers of the Pacific Northwest and interior streams of the Great Basin. During its evolution the species has organized into 14 subspecies with many different life-history characteristics and habitat requirements. Within subspecies, organization is equally complex. For example, life-history traits, such as average size and age, migration strategy, and migration timing, vary among individual spawning populations of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in tributary streams of Yellowstone Lake. Understanding the effects of human perturbations on life-history organization is critical for management of the cutthroat trout and other polytypic salmonid species. Loss of diversity at any hierarchical level jeopardizes the long-term ability of the species to adapt to changing environments, and it may also lead to increased fluctuations in abundance and yield and increase the risk of extinction. |
| Genre: | Article |
| ProdID: | 1015679 |
| Citation Author: | Gresswell, Robert E.; Liss, W. J.; Larson, Gary L. |
| Citation Contributing Office: | Forest and Rangeland Ecosystem Science Center |
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| Citation End Page: | 309 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Journal of Fisheries and Aquatic Sciences |
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| Citation Number Of Pages: | 12 |
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| Citation Phsyical Description: | p. 298-309 |
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| Citation Search Results Text: | Life-history organization of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in Yellowstone Lake; 1994; Article; Journal; Canadian Journal of Fisheries and Aquatic Sciences; Gresswell, Robert E.; Liss, W. J.; Larson, Gary L. |
| Citation Start Page: | 298 |
| Citation Volume: | 51 |
| Citation Year: | 1994 |
| Type: | citation/reference |
| Text: | Life-history organization of Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) in Yellowstone Lake; 1994; Article; Journal; Canadian Journal of Fisheries and Aquatic Sciences; Gresswell, Robert E.; Liss, W. J.; Larson, Gary L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
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