1996 Specimens of Selected Taxa Stored at ALA
Cook M. 1996. 1996 Specimens of Selected Taxa Stored at ALA
From June 23 to July 19 of 1997 and 1998, a portable rigid weir was operated on Tanada Creek, a third order perennial stream and tributary to the upper Copper River in southeast interior Alaska. 1997 is the first year of weir operation in a projected three-year study. Only partial counts were obtained due to delayed installation, limited personnel, and a washout of the weir in a high water event. A total of 20,729 (interpolated to 27,521) sockeye salmon (Oncorhynchus nerka) and 2 chinook salmon (O. tshawytscha) was counted. Only 16 samples for length and sex were sampled for sockeye salmon and did not constitute a representative subsample. The second consecutive year of the weir operation (1998), a total of 28,992 sockeye salmon and 2 chinook salmon were counted. A total of 137 sockeye salmon was sampled for age, length, and sex frequencies. Females comprised 49% of the sample. Approximate mid-eye to fork length for female sockeyes was 540 mm (N=67, SD=30) and 600 mm (N=70, SD=30) for males. Two age groups were present in the sample, with age 1.3 representing 98% of those sampled, and age 1.2 representing 2%; Accession Number WRST-00142.