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Cybium,
Revue
Internationale dIchtyologie |
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Aggressive mimicry by the juvenile of the redmouth grouper, Aethaloperca rogaa (Serranidae). David B. SNYDER (1), John E. RANDALL (2) & Scott W. MICHAEL (3) (1) Continental
Shelf Associates, Inc., 759 Parkway Street, Jupiter, Florida 33477, USA. Abstract.
- The juvenile of the Redmouth Grouper, Aethaloperca rogaa
(Forsskål, 1775), which iscolored differently than the adult, closely
resembles several small, non predatory reef fishes (Centropyge
spp., Pomacentrus spp., and Stegastes spp.). We argue that
this resemblance is not simple convergence or coincidence, but mimicry.
The mimic and models have overlapping geographic ranges, the mimic and
the models occupy the same habitat, and the mimic alters its normal behaviour
to enhance imitation of the models. By resembling small reef fishes A.
rogaa gains the advantage of disguise when foraging for small fishes,
thus this is an example of aggressive mimicry. Key-words. - Serranidae - Aethaloperca rogaa - ISW - ISEW - Behavior - Mimicry. |
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