A Preliminary Experimental Analysis of Predator Face Recognition by Chromis caeruleus (Pisces, Pomacentridae)

Authors

  • Ilan Karplus,

    Corresponding author
    1. Department of Zoology, the Hebrew University of Jerusalem, Jerusalem, Department of Zoology, Tel-Aviv University, Ramat Aviv, Department of Psychology, Bar Ilan University, Ramat-Gan
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  • Menachem Goren,

    Corresponding author
    1. Department of Zoology, the Hebrew University of Jerusalem, Jerusalem, Department of Zoology, Tel-Aviv University, Ramat Aviv, Department of Psychology, Bar Ilan University, Ramat-Gan
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  • Daniel Algom

    Corresponding author
    1. Department of Zoology, the Hebrew University of Jerusalem, Jerusalem, Department of Zoology, Tel-Aviv University, Ramat Aviv, Department of Psychology, Bar Ilan University, Ramat-Gan
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Dept. of Zoology, The Hebrew University of Jerusalem, Jerusalem, Israel

Dept. of Zoology, Tel-Aviv University, Ramat-Aviv, Israel

Dept. of Psychology, Bav Ilan University, Ramat Gan, Israel

Abstract

Abstract

An experimental analysis of predator face recognition was carried out using 360 Chromis caeruleus. Members of this species discriminated between a multicued, two-dimensional model of a piscivorous fish (Fam. Serranidae) and a typical non-piscivorous fish (Fam. Acanthuridae). Mouth size and shape were important discriminatory cues. The disruptive pattern of black dots on the face of a piscivorous fish reduced its appropriate recognition by Chromis caeruleus.

Zusammenfassung

Um herauszufinden, ob Raubfische von vorn erkannt werden können, wurden Versuche mit 360 Chromis caeruleus, einem im Korallenriff lebenden Fisch, durchgeführt und analysiert.

Chromis caeruleus konnte zwischen zweidimensionalen Modellen eines typischen fischfressenden Fisches (Fam. Serranidae) und eines typischen nichtfischfressenden Fisches (Fam. Acanthuridae) unterscheiden.

Variationen in Größe und Form des Fischmauls waren wichtigere Unterscheidungsmerkmale als die Augengröße und der Augenabstand.

Weiterhin erkannte Chromis caeruleus die Frontalansicht eines fischfressenden Fisches, die durch ein Muster schwarzer Punkte getarnt war, weniger gut.

Ancillary