Stock status of Chena River Arctic grayling in 1998
By: by William P. Ridder.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 99-35.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services
Published: 1999
Place of publication: Anchorage
Language: eng
Number of pages: 44
Subjects: Arctic grayling -- Alaska -- Chena River -- Statistics.; Fish populations -- Alaska -- Chena River -- Statistics.; Fishes -- Alaska -- Chena River -- Statistics.
Genres: Statistics.
Other titles: Federal aid in sport fish restoration (Alaska)
Description: Status of the Arctic grayling Thymallus arcticus stock in the lower 144 km of the Chena River in 1998 was described by estimates of abundance, age and length composition, recruitment, and survival rate estimates during July. Estimated abundance was 27,563 (SE = 3,604) Arctic grayling 150 mm FL. Ages 1 through 13 were represented in the sample of which the largest percentage was age-5 at 25%. Stock-size (150 - 269 mm FL) and quality-size Arctic grayling (270 339 mm FL) each comprised 48% of the population. Recruitment of age-5 fish between 1997 and 1998 was 6,830 (SE = 1,050) Arctic grayling and annual survival during this period was 90.5% (SE = 11.0%). A comparison of the catches between May and July sampling showed a significantly higher proportion of large adult sized fish in May. In addition, the catch of the two samples when judged by effort suggested greater abundance of fish in May.
Notes: "November 1999."

Includes bibliographical references (p. 39-42).

Also issued online.

Partially financed by the Federal Aid in Sport Fish Restoration Act ... under Project F-10-14, Job No. R-3-2(a).