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The lunar cycle determines availability of coral-reef fishes at fish markets

Authors

  • A. R. Bos,

    Corresponding author
    1. Netherlands Centre for Biodiversity Naturalis, P. O. Box 9517, 2300 RA Leiden, The Netherlands
      Author to whom correspondence should be addressed at present address: Department of Biology, School of Science and Engineering, The American University in Cairo, P. O. Box 74, New Cairo 11835, Egypt. Tel.: +20 2 2615 2903; email: arthurrbos@yahoo.com
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  • G. S. Gumanao

    1. Research Office, Davao del Norte State College, New Visayas, 8105 Panabo, The Philippines
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Author to whom correspondence should be addressed at present address: Department of Biology, School of Science and Engineering, The American University in Cairo, P. O. Box 74, New Cairo 11835, Egypt. Tel.: +20 2 2615 2903; email: arthurrbos@yahoo.com

Abstract

During 139 visits between March 2009 and May 2011, it was found that the availability of reef fishes at a local fish market in the Philippines was highly affected by the lunar cycle. The number of vendors selling reef fishes was significantly lower (13·4%) during third lunar quarters (full moon periods) than during the first, second and fourth lunar quarters (40·2, 25·0 and 30·0%, respectively). It is recommended that the influence of the lunar cycle on fish availability is considered when designing sampling strategies for catch surveys.

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