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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 27, No. 2, 2009, pp. 195-203
Bioline Code: zt09022
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 27, No. 2, 2009, pp. 195-203

 en Contribution to the knowledge of benthonic macromollusks associated to pepitona, Arca zebra check for this species in other resources (Swainson, 1833), in the natural bank of Chacopata, Araya Peninsula, Venezuela
Licet, Berenice; Acosta, Vanesa; Prieto, Antulio & Garcia, Natividad

Abstract

As part of a monitoring program of the marine areas at northern of Sucre state, Venezuela, we examined the malacological diversity of macromollusk associated to ark shell, Arca zebra check for this species in other resources , located in the natural bank of Chacopata. Monthly sampling was made from January to March 2006. A total of 31 species were identified belonging to 21 families of 4 classes of mollusk that included 12 species of bivalves, 17 gastropods, one cephalopods and one poliplacophoro. Parameters of numeric diversity were low (H’ = 1.907 to 2.034 bits/ind; J’= 0.591 to 0.649; IS = 0.209 to 0.258), while the dominance oscillated between 35.99 and 43.61%. Alpha index of the logarithmic series model fluctuated between 4.819 and 6.917. The scarce monthly variation confirms previous research and they indicate that the community structure is stable. Fourteen constant species were determined being those more abundant the bivalves Arca zebra, Chama congregata check for this species in other resources , Chama sarda check for this species in other resources , while the gastropods were Chicoreus brevifrons check for this species in other resources y Crepidula ausitulata check for this species in other resources . Arca zebra was the dominant species in number and occupied a central role in the community, supporting one of the most important fisheries in the area.

Keywords
Arca zebra, pepitona, bivalves, northeast, mollusks

 
 es Contribución al conocimiento de los macromoluscos bentónicos asociados a la pepitona, Arca zebra check for this species in other resources (Swainson, 1833), del banco natural de Chacopata, Península de Araya, Venezuela
Licet, Berenice; Acosta, Vanesa; Prieto, Antulio & Garcia, Natividad

Resumen

Como parte de un programa de monitoreo de áreas marinas del norte del estado Sucre, Venezuela, se analizó la diversidad malacológica de los macromoluscos asociados a la pepitona, Arca zebra check for this species in other resources , ubicado en el banco natural de Chacopata, desde enero hasta marzo 2006. Se identificaron un total de 31 especies pertenecientes a 21 familias y 4 clases de moluscos, que incluyeron 12 especies de bivalvos, 17 gasterópodos, un cefalópodo y un poliplacóforo. Los parámetros de diversidad numérica fueron bajos (H’ = 1,907 a 2,034 bits/ind; J’ = 0,591 a 0,649, IS = 0,209 a 0,258) mientras que la dominancia osciló entre 35,9 y 46,4%. El índice α de la serie logarítmica mensual fluctúo entre 4,819 y 6,917. La escasa variación mensual de la diversidad confirma investigaciones previas e indican que la estructura comunitaria es estable. Se determinaron 19 especies constantes siendo las mas abundantes los bivalvos Arca zebra, Chama congregata check for this species in other resources , Chama sarda check for this species in other resources y Chama sarda, mientras que en los gasterópodos fueron Chicoreus brevifrons check for this species in other resources y Crepidula ausitulata check for this species in other resources . Arca zebra fue la especie dominante en numero, indicando que desempeña el papel más importante en la comunidad como un eficiente filtrador, lo cual le permite soportar una de las pesquerías más importantes de la región.

Palabras-clave
Arca zebra, pepitona, bivalvos, nororiente, moluscos, diversidad

 
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Alternative site location: http://www.sian.inia.gob.ve/repositorio/revistas_ci/ZootecniaTropical/ztindice.htm

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