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Report: Observations on Cutthroat Trout of the Mosquito Lake System Queen Charlotte Islands (00028MORI)

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Resident juvenile and adult cutthroat trout (Oncorhynchus clarki) were sampled from February 1983 to July 1984 in Mosquito Lake and its tributaries on the Queen Charlotte Islands. Results are discussed relative to other coastal cutthroat trout populations.

Author:  de Leeuw, A.D.

Old Reference Number:  sk57

Date Published:  Mar 1987

Report ID:  2557

Audience:  Government and Public

Resident juvenile and adult cutthroat trout (Oncorhynchus clarki) were sampled from February 1983 to July 1984 in Mosquito Lake and its tributaries on the Queen Charlotte Islands. Young of the year trout found in two small (2 to 5 in width) tributary streams at average densities of 2.73 and 2.03 per m2 while in a larger (14 m width) stream the density was .36 per m2. Parr utilized these streams at .27, .43, and .05 per m2 respectively. Fry were generally found in shallow riffles, while parr utilized primarily pools. Fork length of lake fish averaged about 330 mm and ranged from 110 to 610 mm. Within streams trout lengths ranged from 20 to 145 mm. The most abundant age group in streams during the summer was 0 plus (84 percent), followed by 1 plus (13 percent), 2 plus (2.5 percent) and some 3 plus and 4 plus (.5 percent). In the lake, age 5 plus was the most numerous (30.7 percent) followed by 4 plus (26.2 percent), 3 plus (26.2 percent), 6 plus (10.7 percent) and 2 plus (6.2 percent). Of the 128 adult lake cutthroat sampled, 40 percent were males. Only 29 percent of all lake fish sampled were sexually mature, the majority of these were females. All fish in excess of 420 mm were mature females. Fecundity ranged from 617 to 742 for four females sampled.Results are discussed relative to other coastal cutthroat trout populations.

Report Type
  Fish and Aquatic Habitat Information
 
Subject
  Fish Species - Cutthroat Trout (General) - Oncorhynchus clarki
  Region - Skeena
  Fish and Fish Habitat - Lake
  Fish and Fish Habitat - Stock Assessment
  Watershed Groups - 950 - Moresby Island Rivers
 


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