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Recruitment of catarina scallop (Argopecten ventricosus) larvae on artificial collectors off the NE coast of the Gulf of California

Authors

  • Gaspar Soria,

    Corresponding authorCurrent affiliation:
    1. Centro Nacional Patagónico-CONICET, Puerto Madryn, Argentina
    • School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, USA
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  • Miguel F. Lavín,

    1. Departamento de Oceanografía Física, Centro de Investigación Científica y de Educación Superior de Ensenada, Ensenada, Baja California, México
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  • Iván Martínez-Tovar,

    1. Centro Intercultural de Estudios de Desiertos y Océanos, Puerto Peñasco, Sonora, México
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  • Alberto Macías-Duarte

    1. School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona, USA
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Correspondence: G Soria, School of Natural Resources and the Environment, University of Arizona, Biosciences East 325D, Tucson, Arizona 85721, USA. E-mail: soria@cenpat.edu.ar

Abstract

We evaluated recruitment of larvae of catarina scallop, Argopecten ventricosus, in the area of Puerto Peñasco, NE Gulf of California. We moored artificial collectors in six sites from June 2007 to August 2008 and replaced them every 2 months. We used monthly (July 2002–September 2011) sea surface temperature (SST, °C) and surface chlorophyll-a concentration (SSChl, mg m−3) Aqua/MODIS satellite data to describe seasonal environmental behaviour study area. Also, we recorded bottom temperature at each site every 4 h, and every 2 months measured sea surface salinity, temperature and dissolved oxygen. We used a repeated measures anova to evaluate differences in the number of recruited spat between main factors, and analysed the presence of multimodal spat shell size frequency distributions. Overall, spat recruitment was negatively correlated with seawater temperature and showed higher spat recruitment abundances throughout winter, which is the season with the highest surface chlorophyll a concentration. We estimated multimodal shell size frequency distributions characterized by more than one modal size. The natural collection of A. ventricosus spat on artificial collectors in the area can be successfully performed over a protracted period (November–December to May–June). Our results extend the area where collection of A. ventricosus spat can be successful.

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