Evaluation of lake trout stock status and abundance in selected lakes in the upper Copper and upper Susitna drainages, 1994

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Evaluation of lake trout stock status and abu ...
Nicole J. Szarzi
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January 20, 2010 | History

Evaluation of lake trout stock status and abundance in selected lakes in the upper Copper and upper Susitna drainages, 1994

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Mark-recapture experiments were conducted to estimate the abundance, survival rates and recruitment to lake trout Salvelinus namaycush populations in Paxson Lake in the Copper River drainage, and Lake Louise in the Susitna River drainage. Maximum sustainable yields and carrying capacities of populations in Paxson Lake and Lake Louise were estimated with thermal habitat volume (THV) measurements: the average volume of water between 8 and 12 C. The mark-recapture experiment conducted at Paxson Lake in 1994 generated an estimate of abundance for 1993 of 2,262 (SE = 126) mature male lake trout on the sampled spawning beds, an increase from 1992 levels. An estimated 2,077 (SE = 112) mature males were present on the sampled spawning beds of Lake Louise in 1993. The number of mature lake trout in Paxson Lake in 1993, estimated from hook and line sampling, was of 45,427 (SE = 22,148), an increase over 1992 levels. The maximum sustainable yield of lake trout from Paxson Lake was 0.92 kg ha-1 y-1, 0.89 kg ha-1 y-1 from Lake Louise, and 0.73 kg ha-1 y-1 for Susitna Lake. The current harvest from Paxson Lake is near estimates of sustainable yield while the harvest from Lake Louise is below sustainable levels.

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Cover of: Evaluation of lake trout stock status and abundance in selected lakes in the upper Copper and upper Susitna drainages, 1994
Evaluation of lake trout stock status and abundance in selected lakes in the upper Copper and upper Susitna drainages, 1994
1995, Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services
in English

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Book Details


Edition Notes

"December 1995"

Includes bibliographical references (p. 18-19).

Also issued online.

Published in
Anchorage
Series
Fishery data series -- no. 95-40.
Genre
Statistics.

The Physical Object

Pagination
ii, 24 p. :
Number of pages
24

ID Numbers

Open Library
OL15577383M

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January 20, 2010 Edited by WorkBot add subjects and covers
December 11, 2009 Created by WorkBot add works page