Escapement of chinook salmon in the Unalakleet River in 1997
By: by Klaus G. Wuttig.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 98-8.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1998
Place of publication: Anchorage, Alaska
Language: eng
Number of pages: 49
Subjects: Chinook salmon -- Alaska -- Unalakleet River -- Statistics.; Salmon fisheries -- Alaska -- Unalakleet River -- Statistics.; Fishing -- Alaska -- Unalakleet River -- Statistics.
Description: During 1997, radio telemetry in conjunction with a counting tower on the North River was used to estimate escapement of adult chinook salmon Oncorhynchus tshawytscha in the Unalakleet River drainage, Alaska. The estimate was attained by expanding the North River counting tower escapement estimate by the proportion of chinook salmon that migrated up the river as determined from a remote tracking station placed at the confluence of the North and Unalakleet rivers which recorded the movements of radio-tagged salmon. A total of 151 chinook salmon were esophageally implanted with pulse-encoded transmitters. Of the 145 (96%) fish which were successfully located, 37.2% (SE = 4.0) and 62.8% (SE = 4.0) swam up the North and Unalakleet rivers, respectively. Estimated escapements for the North River and the entire Unalakleet River drainage were 7,002 (SE = 471) and 18,802 (SE = 2,215) chinook salmon, respectively. Chinook salmon carcasses were collected in the Unalakleet River drainage to estimate age-sex-length compositions. Females comprised 0.25 (SE = 0.03) of the sample. Age class 1.4 comprised the largest proportion of the females sampled, while age class 1.2 comprised the largest proportion of the males sampled.
Notes: May 1998.

Includes bibliographical references (p. 35-37).

Also issued online.