Cutthroat trout studies at Florence Lake, southeast Alaska, 1992
By: by Roger D. Harding and J. Douglas Jones.
Contributors: Jones, J. Douglas.; Alaska. Division of Sport Fish.
Series: Fishery data series -- no. 93-44.
Publisher: Alaska Dept. of Fish and Game, Division of Sport Fish
Published: 1993
Place of publication: Anchorage, Alaska
Language: eng
Number of pages: 30
Subjects: Trout -- Alaska, Southeastern.; Fish populations -- Alaska, Southestern -- Florence Lake.; Florence Lake (Alaska)
Description: Mark-recapture experiments were conducted to estimate the abundance of cutthroat trout Oncorhynchus clarki in Florence Lake on Admiralty Island, near Juneau, in 1992. Cutthroat trout were captured using baited funnel traps and hook and line. Five sampling trips to Florence Lake between April 19 and July 30, 1992 were conducted to mark and recapture cutthroat trout. The estimate of cutthroat trout abundance in Florence Lake was 10,586 (standard error = 1,536) for fish between 180 and 350 millimeters fork length. Three weirs on Florence Lake inlet streams were operated between April 18 and June 10, 1992. These weirs were designed to capture mature cutthroat trout during their spawning migration into the inlet streams. A total of 127 cutthroat were captured; 93 migrating upstream and 34 migrating downstream. A postal survey of registered users of U.S. Forest Service cabins at Florence Lake was conducted to estimate angler effort, catch, and harvests in 1992. At Florence Lake, an estimated 350 hours of angler effort was expended to catch an estimated 1,057 cutthroat trout, 1 kokanee Oncorhynchus nerka, and 362 Dolly Varden Salvelinus malma. Cutthroat trout harvest in Florence Lake in 1992 was estimated to be 182 fish or about 1.7 percent of the population over 180 millimeters fork length.
Notes: "Partially financed by the Federal Aid in Sport Fish Restoration Act ... under project F-10-7 and F-10-8, job no. R-1-1."

"November 1993."

Includes bibliographical references (p. 24).

Also issued online.