Abundance, egg production, and age-sex-length composition of the chinook salmon escapement in the Chena River, 1992
By: by Matthew J. Evenson.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 93-6.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1993
Place of publication: Anchorage, Alaska
Language: eng
Number of pages: 41
Subjects: Chinook salmon -- Alaska -- Chena River.
Other titles: Federal aid in sport fish restoration (Alaska)
Description: 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.
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.