Journal of Ethology

, Volume 5, Issue 1, pp 43–52 | Cite as

Effect of mobbing toward predators by the damselfishPomacentrus coelestis (Pisces: Pomacentridae)

  • Masahiro Ishihara


Field observations on prey-predator interactions, focusing on mobbing behavior byPomacentrus coelestis, were made in the shallow water of Shirahama, Japan. Within the breeding colony of the damselfish, indirect group mobbing toward 6 ambushers and direct mobbing with physical contact only by nesting males toward a stalker were observed. The direct mobbing toward the stalker (moray eel) is suggested to have involved an element of egg-guarding. Group mobbing was usually released by large and quick attacking motion of the predator. Attack intervals of a predator were much longer after it was mobbed than when it was not mobbed, but there was no significant difference in success ratio of the next attack whether mobbing was elicited or not. Consequently, it is concluded that mobbing effectively reduced future predation risk of each mobber.


Shallow Water Field Observation Predation Risk Animal Ecology Physical Contact 
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Copyright information

© Japan Ethological Society 1987

Authors and Affiliations

  • Masahiro Ishihara
    • 1
  1. 1.Department of Fisheries, Faculty of AgricultureKyoto UniversityKyotoJapan

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