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Distribution of Penaeid Shrimp Larvae and Postlarvae in the Upper Gulf of California

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This study describes the distribution pattern of penaeid shrimp larvae and postlarvae in the Upper Gulf of California (UGC) to confirm the trajectories of early stage penaeid shrimp seeking nursery areas, as described by mathematical models. A research cruise was used to sample the total area of the UGC during the major spawning season. Shrimp in various larval stages were concentrated off the Sonora coast (mainland coast) of the UGC, and individuals in postlarvae stage continue this route to the nursery area in the Colorado River delta. Larvae are not advected to nursery areas by residual currents as previously thought. Larvae remain near the mainland coast until they have the motile capability to actively search for a favourable habitat. Este estudio describe el patrón de distribución de las larvas y postlarvas de camarones peneidos en el Alto Golfo de California (AGC). Lo anterior con el propósito de confirmar las trayectorias que siguen los estadios tempranos de los camarones peneidos para alcanzar las áreas de crianza que fueron previamente reportadas por modelos numéricos. Se llevó a cabo un crucero de investigación para muestrear toda el área del AGC. Durante la temporada de desove más importante. Los diferentes estadios larvales se concentraron en la costa de Sonora (costa continental). Los estadios larvales continuaron por esa ruta hacia el área de crianza localizada en el delta del Río Colorado. La corriente residual no es la que transporta a las larvas de camarón a su área de crianza como se había pensado previamente. Las larvas se mantienen cerca de la costa continental del Alto Golfo hasta que tienen capacidad natatoria para encontrar el hábitat favorable.

Affiliations: 1: Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California 22860, Mexico; 2: Centro de Investigaciones Biológicas del Noroeste, Unidad Sonora, Km 2.35 Camino al Tular, Estero de Bacochibampo, Guaymas, Sonora 85465, Mexico;, Email: aaragon04@cibnor.mx; 3: Centro de Investigación Científica y Educación Superior de Ensenada, Km 107 Carretera Tijuana-Ensenada, Ensenada, Baja California 22860, Mexico

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