Evaluations of introduced lake trout in the Tanana drainage, and population abundance of lake trout in Sevenmile Lake
By: by John M. Burr.
Contributors: Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 94-18.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1994
Place of publication: Anchorage
Language: eng
Number of pages: 58
Subjects: Lake trout -- Alaska -- Interior Region -- Statistics.; Fishes -- Alaska -- Interior Region -- Statistics.; Fishery resources -- Alaska -- Interior Region -- Statistics.
Genres: Statistics.
Description: Lake trout stocked as yearlings (age-0) into small lakes in the Tanana drainage in 1988, 1989, and 1991 were sampled during 1993 to estimate abundance, growth, and survival. Estimated abundance of stocked lake trout >150 millimeters fork length in Coalmine #5 Lake was 211 fish (SE = 11); >175 millimeters in Paul's Pond was 154 fish (SE = 9); in North Twin Lake was 217 fish (SE = 54); >210 millimeters in Chet Lake was 180 fish (SE = 10); >150 millimeters in Nickel Lake was 265 (SE = 38); and >160 millimeters in Rapids Lake was 213 (SE = 34). Growth was rapid in these small lakes and was similar to rates estimated from most wild populations. Survival to age-5 for the populations varied from 0.01 to 0.17 with a mean of 0.11 (SE = 0.02). Mean survival to age-4 was estimated at 0.26 (SE = 0.03, range 0.03 - 0.62). Survival to age-2 varied from 0.01 to 0.22 with a mean of 0.09 (SE = 0.02). In 1991, estimated abundance of lake trout 250 millimeters and larger in Sevenmile Lake was 1,426 (SE = 57). Abundance of adult lake trout (>375 millimeters FL) of both sexes was estimated to be 931 (SE = 57) in 1991 and 1,139 (SE = 152) in 1993. A total of 107,500 eggs were live stripped from 90 females. This number of eggs represents a minimum of 20 percent of the annual egg production of the population.
Notes: "August 1994".

Includes bibliographical references (p. 44-45).

Also issued online.