Why is the Eye-like Spot of the Oyanirami Fish Coreoperca kawamebari Located near the Real Eye?
Article first published online: 26 APR 2010
1991 Blackwell Verlag GmbH
Volume 87, Issue 1-2, pages 119–122, January-December 1991
How to Cite
Kohda, Y. and Watanabe, M. (1991), Why is the Eye-like Spot of the Oyanirami Fish Coreoperca kawamebari Located near the Real Eye?. Ethology, 87: 119–122. doi: 10.1111/j.1439-0310.1991.tb01193.x
- Issue published online: 26 APR 2010
- Article first published online: 26 APR 2010
- Received: July 5, 1990 Accepted: October 22, 1990
In agonistic encounters an oyanirami (Coreoperca kawamebari) displays laterally to a rival. The lateral pattern is thought to have a threatening effect, eliciting aggressive reactions. A conspicuous eye-like spot near the real eye is a main component of the pattern and is almost a key stimulus releasing aggressive actions of rivals; it has been shown, however, that the position of the spot has no connection with this effect. In the present study, video-taped bites on two dummies were examined, one with the normal aggressive pattern and one with an artificial posterior-spotted pattern. The natural eye-like spots deflected attacks from the real eyes, but the artificial spots further from the real eyes did not. Only the nearby eye-like spots can preserve the real eyes from rival attacks.