Marine Migration of North American Green Sturgeon
| Autor: | John T. Kelly, Michael Belchik, Erin L. Rechisky, Mary L. Moser, Daniel L. Erickson, A. Peter Klimley, David Welch, Steven T. Lindley, Joseph C. Heublein |
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| Rok vydání: | 2008 |
| Předmět: |
geography
geography.geographical_feature_category biology Continental shelf Aquatic Science biology.organism_classification Fishery Peninsula parasitic diseases Spring (hydrology) Green sturgeon Acipenser Vulnerable species West coast Bay geographic locations Ecology Evolution Behavior and Systematics |
| Zdroj: | Transactions of the American Fisheries Society. 137:182-194 |
| ISSN: | 1548-8659 0002-8487 |
| DOI: | 10.1577/t07-055.1 |
| Popis: | An understanding of the distribution of North American green sturgeon Acipenser medirostris in coastal waters is crucial to minimize impacts on this vulnerable species from various fisheries. To determine migratory patterns, we tagged 213 subadult and adult green sturgeon in spawning rivers and summer aggregation areas with uniquely coded ultrasonic pingers and observed their coastal movements with arrays of automated hydrophones deployed along the West Coast of North America from southeast Alaska to Monterey Bay, California. Green sturgeon exhibited an annual migration along the continental shelf from U.S. to Canadian waters in the fall and an apparent return migration in the spring. Peak migration rates exceeded 50 km/d during the springtime southward migration. Large numbers of green sturgeon were detected near Brooks Peninsula on northwest Vancouver Island, British Columbia, during May-June and October-November. A single fish was detected in southeast Alaska in December. This pattern of detec... |
| Databáze: | OpenAIRE |
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