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Léopold Marc, Chateau O., Gabriault H., Ham J., Andréfouët Serge, Raubani J., Dumas Pascal. (2017). Fish movements within community-managed fishery reserve networks : an acoustic survey of Lethrinus harak in Vanuatu. Marine Ecology Progress Series, 571, 153-168. ISSN 0171-8630

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Lien direct chez l'éditeur doi:10.3354/meps12113

Titre
Fish movements within community-managed fishery reserve networks : an acoustic survey of Lethrinus harak in Vanuatu
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000401800100012
AuteursLéopold Marc, Chateau O., Gabriault H., Ham J., Andréfouët Serge, Raubani J., Dumas Pascal.
SourceMarine Ecology Progress Series, 2017, 571, p. 153-168. ISSN 0171-8630
RésuméAcoustic telemetry has been increasingly used for monitoring fish movements at different spatial and temporal scales. In this study, passive telemetry and fine-scale habitat data were integrated for the first time to investigate the relevance of community fishery reserves (CFRs) for managing reef fish resources. In Efate Island (Vanuatu), 38 thumbprint emperors Lethrinus harak (Lethrinidae) were tagged at 7 sites and tracked between April 2011 and February 2012 using an acoustic array of 16 receivers. The survey area extended over 11.3 km(2) of fringing reef in 3 coastal community tenures that included 3 small CFRs. Habitats were mapped using very high resolution satellite imagery and ground-truthing. Thirty fish were detected for up to 229 d (median = 153 d). Six geographical groups were identified among 21 resident fish. These groups showed strong fidelity to small sites (116 to 763 m) that were located in reserves and fished areas, across community tenures, and across 12 habitat types. Overall, 42 excursions were detected at several hundreds to thousands of meters from the fidelity sites along contiguous fringing reefs, across habitat types, and across boundaries of CFRs and community tenures. The estimated home range size of L. harak ranged from 116 to 3979 m (median: 763 m) and was highly varied within fish groups. We concluded that home range size and behavioral plasticity of L. harak limit the effectiveness of small individual CFRs for protecting this species. Networks of CFRs would be more effective but require management arrangements between neighbor communities.
Plan de classementEcologie, systèmes aquatiques [036] ; Ressources halieutiques [040]
Descr. géo.VANUATU
LocalisationFonds IRD [F B010070081]
Identifiant IRDfdi:010070081
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070081

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