Capturing of pearl oyster spats, Pinctada imbricata (Rodling 1798), with artificial collectors in the Gulf of Cariaco, Venezuela

Abstract:

We estimated the abundance of spats of Pinctada imbricata in Turpialito (Golfo de Cariaco, Venezuela) by analyzing the monthly catch in two artificial substrates, 8 and 21 m deep, between March 30, 1993 and May 30, 1994. We related environmental factors and spat abundance at both depths. Juveniles were observed during most of the period. The highest number of individuals was caught at 8 m (6 to 1176 juveniles caught monthly per 30 x 60 cm collector) and the lowest was caught at 21 m (from 21 to 163 juveniles caught monthly per 30 x 60 cm collector). The models established by multiple analyses did not pbkp_redict environmental control over the reproduction of P. imbricata. When we increased variability given by depth, we were able to build models in which the availability of food (abundance of microalgae and particulated organic material) was the pbkp_redictive environmental factor. This suggests an …

Año de publicación:

2000

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Fuente:

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