Asymmetry of Mouth-Opening of a Small Herbivorous Cichlid Fish Telmatochromis temporalis in Lake Tanganyika

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概要

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• Direction of mouth-opening of a small herbivorous Tanganyikan cichlid, Telmatochromis temporalis, was studied. Each sample fish opened its mouth either rightward or leftward in some degree. The directions of mouth-opening were independent of the body curve directions, and the asymmetry will be due to asymmetric mouth morph individually specific. The degree of the mouth asymmetry was not related to body size, suggesting the asymmetry being not acquired characters. No fish opened the mouth in lateral symmetry, indicating that the asymmetry is different from “fluctuating asymmetry”. This fish took algae on rock surface usually using right or left side of its mouth. However, strong relations between directions of mouth-openings and frequencies of mouth side used in foraging were not found, and the biological role of the asymmetry, if any, is not clear now.

• 社団法人日本動物学会の論文

著者

• Kohda Masanori

  Laboratory Of Animal Sociology Department Of Biology Faculty Of Science Osaka City University

• Kohda Masanori

  Laboratory Of Animal Sociology Faculty Of Science Osaka City University

• Kohda Masanori

  Laboratory Of Animal Sociology Department Of Bio- And Geosciences Graduate School Of Science Osaka C

• Hori Michio

  Animal Ecology, Department of Zoology, Graduate School of Science, Kyoto University

• Sima Keita

  Centre du Recherche en Hydrobiologie

• Sima Keita

  Centre De Recherche En Sciences Naturelles Station D'uvira

• Hori Michio

  Animal Ecology Faculty Of Science Kyoto University

• Mboko Sima

  Centre du Recherche en Hydrobiologie

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• Spawning behavior and reproductive isolation of two species of Pseudolabrus
• Asymmetry of Mouth-Opening of a Small Herbivorous Cichlid Fish Telmatochromis temporalis in Lake Tanganyika
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