Fishery and Limnological Surveys of Twenty Five Lakes on the Kenai National Wildlife Refuge, Alaska, 1993. Alaska Fisheries Data Series Number 97-3

摘要

Fishery and limnological surveys were conducted on 25 remote and roadside lakes on the Kenai National Wildlife Refuge during 1993 to evaluate their potential contribution to recreational fisheries. Experimental gill nets and minnow traps were used to examine species composition and determine relative abundance offish species. Other objectives were to describe the length, weight, and age composition of rainbow trout Oncorhynchus gairdneri and Arctic char Salvelinus alpinus populations; evaluate spawning habitat in lake inlets and outlets; and measure various physical and chemical characteristics of each lake. Sport fish species were found in II of the 25 lakes surveyed. Rainbow trout were found in seven lakes, with the highest catch rates occurring in Upper Ohmer, Angler, Kuguyuk, and Kraenberi Lakes. Arctic char were found in three lakes with the highest catch rates observed in Falcon Lake. Small numbers of nonanadromous coho salmon 0. kisutch were captured in Upper Olmler Lake (N=4) and Mosquito Lake (N=I). Catch results indicate that sport fish populations may no longer exist in some lakes that historically supported these species. Rainbow trout, sockeye salmon, and coho salmon stocked in Upper Jean Lake during the 1960's and 70's are no longer present, and rainbow trout that once inhabited Mosquito and Phalarope Lakes now appear to be absent.