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Promiscuous spawning behaviour of the tropical herring Spratelloides gracilis

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Spawning behaviour of the blue sprat Spratelloides gracilis was observed at shallow reefs of Kuchierabu‐jima Island, southern Japan. The fish carried out promiscuous spawning behaviour on substrata covered with algal mats mainly in the intertidal region of a shallow inlet. The spawning events occurred only at predawn (20–50 min before sunrise) and daily for c. 25 days from mid‐June to mid‐July.

Keywords: algae on rocks; blue sprat; predawn; shore region; spawning behaviour

Document Type: Research Article


Affiliations: Department of Bioresource Science, Graduate School of Biosphere Science, Hiroshima University, Kagamiyama 1-4-4, Higashi-Hiroshima, 739-0046 Japan

Publication date: 2006-01-01

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