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vol.33 número1La temperatura como factor de variabilidad en el desarrollo y morfología de larvas zoeas de Acanthocyclus hassleri Rathbun (Decapoda, Brachyura, Atelecyclidae) cultivadas en laboratorio índice de autoresíndice de materiabúsqueda de artículos
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Investigaciones marinas

versión On-line ISSN 0717-7178

Resumen

RIVERA, Jorge  y  SANTANDER, Edgardo. Seasonal variability in the distribution and abundance of larvae of the red squat lobster (Decapoda, Anomura, Galatheidae) from Northern Chile. Investig. mar. [online]. 2005, vol.33, n.1, pp.3-23. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71782005000100001.

An analysis was made of the distribution and abundance of red squat lobster (Pleuroncodes monodon) larvae off the mouth of the Loa River, northern Chile (20°40'-21°20'S) during oceanographic cruises in January, May, August and October 2003. A total of 20 oceanographic stations were occupied, with zooplankton samples taken using Bongo nets towed from the surface to 100 m depth. Other data obtained at each station included temperature, dissolved oxygen, and seawater density. Maxima of abundance of these larvae were recorded in January and August, with a minimum in May. On N-S tracks the highest abundances were recorded in the northern sector. A more homogeneous distribution of abundance was observed in October. On E-W tracks a differentiated pattern was observed, where zoea stages III-V and megalopae occurred in the oceanic (westward) samples. Also, a seasonal tendency was noted, with foci of larval abundance associated with stations having average temperatures of 14.0-16.0°C and dissolved oxygen concentrations of 1.58 - 4.55 mL·L-1

Palabras clave : larval stages; space-temporal variability; abundance; northern Chile.

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