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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 28, No. 2, 2010, pp. 239-254
Bioline Code: zt10025
Full paper language: English
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 28, No. 2, 2010, pp. 239-254

 es Crecimiento y sobrevivencia de la ostra de mangle Crassostrea rhizophorae check for this species in other resources bajo condición de cultivo intermareal y submareal
Nuñez, Maximiano P.; Lodeiros, César; Ramirez, Enmary; Narváez, Noelis & Graziani, César

Resumen

Se evaluó el crecimiento y la supervivencia de Crassostrea rhizophorae check for this species in other resources en régimen de cultivo submareal e intermareal en la laguna Grande del Obispo, Golfo de Cariaco, estado Sucre, Venezuela, se colocaron semillas de 32-35 mm de longitud dorso-ventral de la concha en cestos mantenidos en parques fijos. Se comparó el crecimiento de las ostras en longitud, biomasa seca, masa de la concha y la supervivencia en los dos sistemas de cultivo, en dos períodos: el primero (I), de octubre 2005 a enero 2006 y el segundo (II) de febrero a septiembre de 2006. Se tomaron los parámetros ambientales: temperatura, salinidad, clorofila a, seston, biofouling y pluviosidad, en función de relacionarlos con la variabilidad del crecimiento y la supervivencia. En los primeros meses, para ambos períodos, se obtuvó una elevada y progresiva mortalidad en el sistema de cultivo submareal, relacionada con la presencia del gasterópodo Cymatium poulsenii check for this species in other resources . Por el contrario, las ostras en condiciones intermareal tuvieron una supervivencia superior a 95 % en ambos períodos. El crecimiento en talla y biomasa no mostró diferencias significativas en los primeros meses entre sistemas, en el período I los organismos submareal e intermareal alcanzaron tallas de 43,3±3,43 y 48,2±4,01 al final del ensayo (3 meses). En el período II las ostras del sistema intermareal alcanzaron los 75,13 ±5,16 mm (incremento de del 108%), durante 7 meses de cultivo. Los resultados muestran una mayor factibilidad de cultivo intermareal, evitando una elevada incidencia de predadores, particularmente Cymatium poulsenii.

Palabras-clave
Crassostrea rhizophorae, cultivo de ostras, cultivo intermareal.

 
 en Growth and survival of the oyster of mangrove low Crassostrea rhizophorae check for this species in other resources condition of culture intermareal and submareal in the Big Lagoon of the Bishop, Cariaco’s Gulf, Venezuela
Nuñez, Maximiano P.; Lodeiros, César; Ramirez, Enmary; Narváez, Noelis & Graziani, César

Abstract

To evaluate the growth and the survival rates of the oyster Crassostrea rhizophorae check for this species in other resources in a regime of sub-tidal and inter-tidal culture at Laguna Grande del Obispo, Gulf of Cariaco, Edo. Sucre, Venezuela, seeds of 32-35 mm in back-ventral length of the shell, were placed in baskets maintained in fixed parks. The oysters growth in length and dry biomass as well as mass of the shell and the survival rates in two culture systems were compared in two periods: the first (I), from October 2005 to January 2006, and the second (II) from February to September of 2006. Environmental parameters of temperature, salinity, a chlorophyll, seston, biofouling and rainfall were taken, based on relating them to the variability of the growth and the survival rates. During the first months, for both periods, a high and progressive mortality in the system of subtidal culture was experienced, related to the presence of the Cymatium poulsenii check for this species in other resources gastropod. On the contrary, oysters in intertidal conditions had a survival rate superior to 95 % in both periods. The growth in length and biomass did not show significant differences, in the first months, between systems; in period I the organisms, both in subtidal and intertidal conditions, reached sizes of 43,3±3,43 and 48,2 ±4,01 at the end of the test (3 months). In period II oysters of the intertidal system, reached 75,13 ± 5,16 mm (an increase the some 108%), during seven (7) months of culture. The results show a greater feasibility of the intertidal culture, the main reason being its avoidance of the incidence of predators, particularly Cymatium poulsenii.

Keywords
Crassostrea rhizophorae, culture of oysters, inter-tidal culture.

 
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