Territorial behavior in juvenile red sea bream Pagrus major and crimson sea bream Evynnis japonica

DOI IR Web Site 2 Citations 16 References
  • KUDOH TAKAYA
    Laboratory of Aquatic Ecology, Department of Aquaculture, Kochi University Hiroshima Prefectural Fisheries Experimental Station
  • YAMAOKA KOSAKU
    Laboratory of Aquatic Ecology, Department of Aquaculture, Kochi University

Search this article

Abstract

The territorial behavior of juvenile red sea bream Pagrus major and crimson sea bream Evynnis japonica was examined at Morode Cove, Ehime Prefecture. Four exclusive types of behavior (attack, mutual attack, head down threat and mutual display) and one escaping behavior (fleeing) were observed in both species. Juvenile of the two sea bream could discriminate between each other and change their territorial behavior depending on the presence of conspecifics or heterospecifics. The territorial behavior toward conspecifics was more aggressive than toward heterospecifics. Interrelationships between the two sea bream were more aggressive than in other heterospecific cases. The two sea breams performed following behaviors toward solo and schooled mullid species. E. japonica ascended the water column more frequently than P. major in high frequency. The former joined conspecific aggregations foraging for planktonic animals around their territories. These observations suggest that territorial individuals of the two sea bream could discriminate intruders utilizing similar food resources in order to maintain their territories.

Journal

  • Fisheries science

    Fisheries science 70 (2), 241-246, 2004

    The Japanese Society of Fisheries Science

Citations (2)*help

See more

References(16)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top