Predation on larval honmoroko <I>Gnathopogon caerulescens</I> in daytime and nighttime by six fish species

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  • 魚類6種による昼夜のホンモロコ仔魚捕食
  • ギョルイ 6シュ ニ ヨル チュウヤ ノ ホンモロコシギョ ホショク

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Abstract

We examined predation on larval honmoroko Gnathopogon caerulescens during the breeding season in daytime and nighttime by six sympatric fish species which inhabit in satellite lakes of Lake Biwa. Although all of the fishes consumed honmoroko larvae in both daytime and nighttime, Sarcocheilichthys variegatus microoculus and Lepomis macrochirus macrochirus fed significantly less on honmoroko larvae in the nighttime than in the daytime. Honmoroko cannibalized its larvae in the daytime and nighttime. These our results suggest that various fishes inhabiting in the satellite lakes during the spawning season of honmoroko potentially have a strong predatory pressure on honmoroko larvae, and the predation pressure might play a role to decrease of the early survival of honmoroko.

Journal

  • Aquaculture Science

    Aquaculture Science 69 (1), 87-91, 2021

    Japanese Society for Aquaculture Science

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