Lake trout studies in the AYK region, 1997
By: by Thomas T. Taube, Klaus G. Wuttig and Lisa Stuby.
Contributors: Wuttig, Klaus G.; Stuby, Lisa.; Alaska. Division of Sport Fish. Statewide Research and Technical Services Unit.
Series: Fishery data series -- no. 98-24.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services
Published: 1998
Place of publication: Anchorage
Language: eng
Number of pages: 38
Subjects: Lake trout -- Alaska -- Interior Region -- Statistics.; Fishing -- Alaska -- Interior Region -- Statistics.; Fish populations -- Alaska -- Interior Region -- Measurement.
Other titles: Lake trout studies in the Arctic-Yukon-Kuskokwim region, 1997.
Description: Standardized gillnet (Index fishing) and hook and line sampling were used in July and August, 1997, as capture methods for lake trout Salvelinus namaycush in Itkillik Lake to estimate the abundance, length composition, and CPUE. A two-sample mark-recapture experiment produced a July 1997 lake trout (> 315 mm) abundance estimate of 8,217 (SE = 1170) with density of 19.6 fish per ha. Lake trout in the 425-450 mm length category were most frequent in the sample, with lengths ranging from 168 to 881 mm. Ages of 45 lake trout ranged from three to 15 years. The CPUE for Index fishing averaged 3.86 fish/net h. An age validation study comparing scales, otoliths, and opercular bones from a cohort of lake trout stocked in 1991 was conducted. The proportion of age structures which reflected the true age was 0.66 (SE = 0.036) for scales and 0.60 (SE = 0.035) for otoliths.
Notes: "September 1998"

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