High Water Temperature Influences on Foraging Responses and Thermal Deaths of Dolly Varden <i>Salvelinus malma</i> and White-spotted Charr <i>S. leucomaenis</i> in a Laboratory

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  • High Water Temperature Influences on Foraging Responses and Thermal Deaths of Dolly Varden Salvelinus malma and White-spotted Charr S.leucomaenis in a Laboratory
  • High Water Temperature Influences on Fo

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Abstract

Water temperature effects on foraging responses and thermal tolerances of two congeneric charrs, Dolly Varden Salvelinus malma and white-spotted charr S. leucomaenis, were examined in aquarium settings. Appetites decreased at ≥16°C for Dolly Varden and at ≥24°C for white-spotted charr. The lethal temperatures were ≥20°C for Dolly Varden and ≥26°C for white-spotted charr. The upper limits of preferred temperature ranges and the lethal temperatures for Dolly Varden were significantly lower than those of white-spotted charr. Temperature preference and thermal tolerance probably play a major role in the distribution of these two species.

Journal

  • Fisheries science

    Fisheries science 63 (1), 6-8, 1997

    The Japanese Society of Fisheries Science

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