Polygynous Mating System of Trimma okinawae (Pisces: Gobiidae) at Kagoshima, Japan with a Note on Sex Change
Identifieur interne : 000807 ( Main/Exploration ); précédent : 000806; suivant : 000808Polygynous Mating System of Trimma okinawae (Pisces: Gobiidae) at Kagoshima, Japan with a Note on Sex Change
Auteurs : Tomoki Sunobe ; Akinobu NakazonoSource :
- Ethology [ 0179-1613 ] ; 1990-01-12.
Abstract
Mating system, social structure and reproductive behaviour of the gobiid fish Trimma okinawae were studied at Akamizu, Kagoshima, Japan. Mating system of this species is polygyny. There were two types of habitat‐related distribution patterns of male and female home ranges: females have home ranges outside a small territory of the male; female home ranges are covered by male territory. Spawnings take place with a cycle of four to five days during the spawning season of June to Sept. In the morning of the day of spawning, males stay at the spawning sites. Females visit the site and spawn with the male. On days between spawnings males exhibit courtship displays at female home ranges. Higher reproductive success is not connected with frequency of such courting of the male, but with male size. The largest female of a social unit changes into a male when the dominant male is removed, which shows that T. okinawae is a hermaphrodite.
Url:
DOI: 10.1111/j.1439-0310.1990.tb00790.x
Affiliations:
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