Synthesis of long-term Studies on the Interactive Ecology of Cutthroat Trout and Dolly Warden Char Populations in Near coastal Lakes of British Columbia

摘要

That cohabiting coastal cutthroat trout (Oncorynchus darki clarki and Dolly Varden char (Salvelinus nialma) together frequently occupy lakes as residents on Islands along much of the coastline of B.C. and range inland up to 100km or more probably has been known by many anglers and others for many decades (see Maps 40, 52 in McPhail 2007), During regional limnological surveys from late spring through . summers of 1951 and 1952 (Northcote and Larkin 1956) I often noted in a number of B.C. coastal lakes that cutthroat trout were most often taken by nets in the shallow nearshore waters whereas Dolly Varden were far more abundant in nets set in offshore deeper layers. Earlier Foerster and Ricker (1941) briefly reported on such summer distribution differences for cohabiting Cultus Lake populations of cutthroat trout and Dolly Varden, as did Billon and Shepard (1955) at least for cutthroat trout distribution where they cohabited with Dolly Varden in Lakeise Lake,