Georgetown Lake management survey
By: Montana Department of Fish, Wildlife and Parks, Fisheries Division
Series: Job progress report -- F-12-R-26, II-b; Job progress report -- F-12-R-27, II-b; Job progress report (Montana. Fisheries Division) -- F-12-R-26, II-b.; Job progress report (Montana. Fisheries Division) -- F-12-R-27, II-b.
Publisher: Montana Dept. of Fish, Wildlife and Parks, Fisheries Division
Published: 1981
Place of publication: [Helena, Mont.]
Language: eng
Number of pages: 16
Subjects: Periodicals; Kokanee salmon; Montana; Montana. Fisheries Division; Trout fisheries; Fishery management; Spawning
Other titles: Investigation of more important waters
Description: Catch rates averaged 0.7 and 1.1 fish/hour in the summer and 4.7 and 2.2 fish/hour in the winter during 1979 and 1980.  Surveys of anglers showed that a large majority of fishermen preferred to maintain the current management plan for rainbow trout with an annual spring plant of 250,000 fish and daily limits of 10 trout.  Kokanee caught by fishermen continued to decline in size due to high densities.  Daily limits were removed, the snagging season was extended, and a barrier was installed on the spawning tributary in response to the stunting.  Summer growth rates for adult salmon tripled under the new regulations.  Spawning runs were monitored but attempts to establish abundance indices were unsuccessful.  A moderate decline in winter dissolved oxygen levels was measured in 1980-81.  A severe oxygen depletion was measured in 1979-80 but with no apparent adverse affects to the fishery.  Several disease outbreaks were investigated including one that killed 5,000 to 10,000 game fish.
Notes: Includes bibliographical references (p. 16).

Job progress report ; July 1, 1979-June 30, 1981.

Also available online via the Montana Memory Project .pdf file.