Coexistence of fish and large Hesperodiaptomus species (Crustacea: Calanoida) in subalpine and alpine lakes

In western Canada, the large diaptomids Hesperodiaptomus arcticus and (or) H. shoshone (> 2.5 mm) usually coexist with fish in large subalpine and alpine lakes located 1800 – 2455 m above sea level, but not in small lakes with area 2–16 ha and maximum depth 4–16 m. The char (Salvelinus) and trout...

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Bibliographic Details
Published in:Canadian Journal of Zoology
Main Authors: Donald, David B., Anderson, R. Stewart, Mayhood, David W.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1994
Subjects:
Animal Science and Zoology
Ecology, Evolution, Behavior and Systematics
Canada
Zooplankton
Online Access:http://dx.doi.org/10.1139/z94-035
http://www.nrcresearchpress.com/doi/pdf/10.1139/z94-035
Description
Summary:In western Canada, the large diaptomids Hesperodiaptomus arcticus and (or) H. shoshone (> 2.5 mm) usually coexist with fish in large subalpine and alpine lakes located 1800 – 2455 m above sea level, but not in small lakes with area 2–16 ha and maximum depth 4–16 m. The char (Salvelinus) and trout (Oncorhynchus) species that inhabit these lakes are usually caught at depths of < 10 m and feed near shore. The profundal and offshore pelagic habitats of the large lakes provide a refuge from salmonid predation, permitting coexistence of large zooplankton and fish.

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