2 edition of Evaluations of introduced lake trout in the Tanana drainage, and population abundance of lake trout in Sevenmile Lake found in the catalog.
Evaluations of introduced lake trout in the Tanana drainage, and population abundance of lake trout in Sevenmile Lake
John M. Burr
by Alaska Dept. of Fish and Game, Division of Sport Fish in Anchorage
Written in English
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.
|Statement||by John M. Burr.|
|Series||Fishery data series -- no. 94-18.|
|Contributions||Alaska. Division of Sport Fish.|
|LC Classifications||SH11 .F574 1994 no. 18|
|The Physical Object|
|Pagination||vi, 58 p. :|
|Number of Pages||58|
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