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Social relation in a small experimental population of Odontobutis obscurus (Temminck et Schlegel) as related to individual growth and food intake by Hiroshi Yamagishi; Toshiyuki Maruyama; Kazuo Mashiko is a Environmental Science article available to read on EtoBox.

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Social relations among even-sized male individuals of Odontobutis obscurus, a carnivorous eleotrid goby, were observed in a small experimental population with measurements of individual body size and food intake. 1. Nipping, chasing, threatening, fighting and territorial defence were always observed. The dominance order of an incomplete peck-right type was recognized all the time. The dominant and the second-rank fish widely surpassed other subordinate individuals in the frequency of their attacking behaviour. 2. The dominant fish occupied and defended the whole bottom area of the aquarium (ca. 0.36 m) as his territory throughout the experimental period except only 1 day, though he was frequently challenged by the second-rank fish. Introducing nest-holes in the aquarium did not cause either increase of territory number or decrease of territory size. The holes were used by the dominant fish as the center of his territory. 3. All individuals increased their body weight in the initial period, but the growth of two subordinate fish became stagnant in the middle stage and later on, resulting in a wider difference between the growth rates of dominant and subordinate groups. 4. The second

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Author

Hiroshi Yamagishi; Toshiyuki Maruyama; Kazuo Mashiko

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0029-8549)

Published

1974

Language

EN

Field

Environmental Science (Physical Sciences)