Abundance of coho salmon in the Chilkat River in 1998
By: by Randolph P. Ericksen.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 99-29.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1999
Place of publication: Anchorage
Language: eng
Number of pages: 22
Subjects: Coho salmon -- Alaska -- Chilkat River -- Statistics.; Fish tagging -- Alaska -- Chilkat River -- Statistics.; Fishes -- Alaska -- Chilkat River -- Statistics.
Other titles: Federal aid in sport fish restoration (Alaska)
Description: The abundance of coho salmon Oncorhynchus kisutch that returned to the Chilkat River in 1998 was estimated using a mark-recapture experiment. Fish were marked in the lower Chilkat River with individually numbered solid-core spaghetti tags and batch marks. Fish were later sampled upriver near spawning grounds to recover tags and estimate marking fractions. Eight hundred twenty-nine (829) coho salmon  500 mm mid eye to tail fork (MEF) were marked in the lower Chilkat River between August 8 and October 13, 1998 in fish wheels and drift gillnets. We examined 1,526 coho salmon  500 mm MEF on spawning areas of the Chilkat River drainage, and 27 of these were marked. A Darroch estimator was used to estimate that 37,132 (SE = 7,432) coho salmon  500 mm immigrated into the Chilkat River during 1998. We estimated that 72.5% (SE = 2.3%) of these fish were age 1.1 (1995 brood year), and 27.5% age 2.1 (1994 brood year). Most (55.6%, SE = 1.3%) were males.
Notes: "October 1999."

Includes bibliographical references (p. 17-19).

Also issued online.

Partially financed by the Federal Aid in Sport Fish Restoration Act ... Project F-10-14, Job No. S-1-5(b)