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The effect of external stimuli on the attack readiness of a cichlid fish

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Summary

The readiness of a cichlid fish to attack conspecifics, measured by the number of attacks it delivers per minute in a standardized situation, can immediately be increased by presenting another fish or a dummy of a fish for a short time. After that the attack readiness returns exponentially to its previous level. The analysis of the immediate increase in the attack readiness has shown that the appearance of a dummy causes an additive increase in attack readiness, which is raised by a constant amount after the dummy presentation.

Zusammenfassung

Die Bereitschaft eines Cichliden, Artgenossen anzugreifen, gemessen an der Zahl der Angriffe, die das Tier pro Minute in einer standardisierten Situation liefert, kann augenblicklich durch die kurzzeitige Darbietung eines weiteren Fisches oder einer entsprechenden Attrappe gesteigert werden. Danach kehrt die Angriffsbereitschaft exponentiell auf ihr früheres Niveau zurück. Die Untersuchung der augenblicklichen Steigerung der Angriffsbereitschaft hat gezeigt, daß das Erscheinen einer Attrappe die Bereitschaft additiv um einen konstanten Betrag erhöht.

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Bibliographie

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Heiligenberg, W. The effect of external stimuli on the attack readiness of a cichlid fish. Z. Vergl. Physiol. 49, 459–464 (1965). https://doi.org/10.1007/BF00298113

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  • DOI: https://doi.org/10.1007/BF00298113

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