Representative scales obtained from fish caught in Loon Lake by anglers and from spawners collected in traps on the inlet and outlet streams are presented with life history interpretations. All outlet stream fish were fin clipped as emigrating fry (0+) or juveniles (1+). Collection of marked fish as spawning adults provided a means of associating particular scales with fish of known life histories. Growth rates of fish leaving the stream as fry appeared more uniform than those leaving as juveniles. Difficulties in distinguishing four and five-year-old fish were apparent because of the slow growth of five-year-old fish. Also, repeat spawners were difficult to distinguish from maiden fish, since few broken circuli were apparent. This is likely the result of the small migration distances involved (spawning areas are typically within 500 meters of the lake).
Tautz, A.F., Land, R.W.. 1976. Life History Interpretations From Selected Scales of Loon Lake Rainbow Trout Stocks. Fish and Wildlife Branch. Fisheries Technical Circular. FTC20
Topic: Fish and Fish Habitats
Keywords: rainbow trout, Loon Lake, growth, spawning
Scientific Name: Oncorhynchus mykiss
English Name: Rainbow Trout
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