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In 1992, the number of adult chinook salmon Oncorhynchus tshawytscha that returned to spawn in the Chena River near Fairbanks, Alaska, was estimated using a mark-recapture experiment. A riverboat equipped with electrofishing gear was used to capture 799 chinook salmon in late July and early August. Captured chinook salmon were marked with jaw tags, fin-clipped, and released. In early August, 581 chinook salmon carcasses were collected. Eighty-eight of these carcasses had been marked. The estimate of abundance was 5,230 (SE = 478) chinook salmon. The estimated number of females and males were 1,607 (SE = 162) and 3,623 chinook salmon (SE = 338), respectively. Estimated potential egg production was 14.9 million eggs (standard error = 1.1). Mean length-at-age statistics and age class composition estimates are presented. During aerial surveys, the highest count of live and dead chinook salmon was 825, or 16 percent of the mark-recapture point estimate.
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Subjects
Chinook salmonPlaces
Chena River, AlaskaEdition | Availability |
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Abundance, egg production, and age-sex-length composition of the chinook salmon escapement in the Chena River, 1992
1993, Alaska Dept. of Fish and Game, Division of Sport Fish
in English
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Book Details
Edition Notes
"Jointly financed by the Federal Aid in Sport Fish Restoration Act ... under Project F-10-8, Job No. S-3-1(a).
"March 1993."
Includes bibliographical references (p. 29-33).
Also issued online.
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Feedback?January 18, 2010 | Edited by WorkBot | add subjects and covers |
December 11, 2009 | Created by WorkBot | add works page |