Relationship of Color Pattern to Dominance Order in a Freshwater Serranid Fish, Coreoperca kawamebari

概要

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The relationship of color pattern to dominance order in a freshwater serranid fish, Coreoperca kawamebari was observed during non-reproductive period in an aquarium 200 × 150 × 25 cm deep containing many rocks for refuge. Just after being put into the aquarium, the fish fought long and furiously, and when parted from opponents, they displayed coarse coloration with an obscure vertex bands and stripes. As days went by, the fights became brief and simple, and a dominance order was built up among the fish. The fish maintained the color pattern corresponding to their ranks even in solitude. The most dominant fish showed an intermediate color over its entire body with conspicuous eye-like spots, the medium-ranked fish showed an intermediate color on the anterior half and stripes on the posterior half of its body, and the lowest-ranked fish displayed dark stripes and a white vertex band. Results show that motives of aggression and fear induce the intermediate coloration and the striped pattern, respectively, that when both motivations exist, the fish displays an intermediate color on the anterior half and stripes on the posterior half of the body, and that when neither motivation exists, the fish takes on a coarse coloration with an obscure vertex band and stripes.
社団法人日本動物学会の論文
1982-06-25