Diel habitat partitioning by bull charr and cutthroat trout during fall and winter in Rocky Mountain streams

Michael J. Jakober; Thomas E. McMahon; Russ F. Thurow

Treesearch

Diel habitat partitioning by bull charr and cutthroat trout during fall and winter in Rocky Mountain streams

Formally Refereed

Authors:

Michael J. Jakober, Thomas E. McMahon, Russ F. Thurow

Year:

2000

Type:

Scientific Journal

Station:

Rocky Mountain Research Station

Source:

Environmental Biology of Fishes. 59: 79-89.

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Abstract

We used underwater observation to determine diel habitat partitioning between bull charr, Salvelinus confluentus, and cutthroat trout, Oncorhynchus clarki, during fall and winter (0.1-8.3°C) in two Rocky Mountain streams that differed in habitat availability. The majority (>70%) of both species emerged from concealment cover at night, though bull charr exhibited a greater tendency for nocturnal behavior than cutthroat trout. Differences in day and night counts were most pronounced at temperatures

Keywords

Salvelinus confluentus, Oncorhynchus clarki, salmonids, diel behavior, habitat use, winter ecology

Citation

Jakober, Michael J.; McMahon, Thomas E.; Thurow, Russell F. 2000. Diel habitat partitioning by bull charr and cutthroat trout during fall and winter in Rocky Mountain streams. Environmental Biology of Fishes. 59: 79-89.