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Courtship and spawning sounds in bird wrasse Gomphosus varius and saddle wrasse Thalassoma duperrey

Authors

  • K. S. Boyle,

    Corresponding author
    1. Department of Zoology and Hawaii Institute of Marine Biology, University of Hawaii at Manoa, Honolulu, HI 96822, U.S.A.
      Tel.: +1 808 236 7466; fax: +1 808 956 9812; email: kboyle@hawaii.edu
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  • T. E. Cox

    1. Department of Botany, University of Hawaii at Manoa, Honolulu, HI 96822, U.S.A
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Tel.: +1 808 236 7466; fax: +1 808 956 9812; email: kboyle@hawaii.edu

Abstract

Acoustic signals from the bird wrasse Gomphosus varius and saddle wrasse Thalassoma duperrey were recorded on coral reefs in Hawaii. Terminal phase males in both species emit two types of pulse trains (type I and type II). Type I pulses were produced during spawning and courtship, while type II pulses were associated only with courtship behaviours. Gomphosus varius type I pulses were of lower frequency than T. duperrey type I pulses (271 v. 840 Hz) and were of narrower band. Discriminant function analyses revealed interspecific differences between type I pulse trains and individual pulses of both types. This study is the first documentation of courtship and spawning sounds in sympatric labrids and shows divergence in acoustic signals.

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