U.S. Fi,sh & WJldUf,e,Servlce Abundance and Run Timing of Adult Salmon
A resistance board weir was operated between July 8 and August 13, 2000 to collect abundance, run timing, and biological information from salmon returning to Henshaw Creek, a tributary of the Koyukuk River in north-central Alaska. This was the first year of operating a weir at this location. A total...
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Language: | English |
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Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.6161 http://www.arlis.org/docs/vol1/A/422815051/422815051-2000.pdf |
Summary: | A resistance board weir was operated between July 8 and August 13, 2000 to collect abundance, run timing, and biological information from salmon returning to Henshaw Creek, a tributary of the Koyukuk River in north-central Alaska. This was the first year of operating a weir at this location. A total estimate of 193 Chinook salmon Oncorhynchus tshawytscha and 24,406 summer chum salmon O. keta passed through the weir. Four resident species were counted with longnose sucker Catostomus catostomus the most abundant (N=325), followed by Arctic grayling Thymallus arcticus (N=21), northern pike Esox lucius (N=4), and whitefish Coregonus spp. (N=1). The median date of passage for Chinook salmon was July 16. The Chinook salmon run was composed of 20 % females. The age distribution was predominately age 1.3 (63%). The median date of passage for chum salmon was July 22. The chum salmon run was composed of 57 % females. The age distribution was predominately age 0.3 (57%) and 0.4 (42%). |
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