Distribution and Seasonal Variation of Intertidal Bivalves on a Sandy Beach at Caimare Chico, Venezuela

  • José Delgado Instituto Nacional de Investigaciones Agrícolas (INIA), Laboratorio de Evaluación de Recursos Pesqueros, Estación Local El Lago
  • Yinett Reverol Universidad del Zulia, Facultad Experimental de Ciencias, Laboratorio de Cultivo de Invertebrados Acuáticos, Departamento de Biología
  • Antonio Godoy Universidad del Zulia, Facultad Experimental de Ciencias
  • Héctor Severeyn Universidad del Zulia, Facultad Experimental de Ciencias

Resumen

We studied distribution and seasonal variation of intertidal bivalves on a sandy beach at Caimare Chico, Zulia State, Venezuela, from December 1995 to August 1996, during rainy and dry seasons. Samples were collected at lowest tide in water depths from 0.0 to 0.5 m, by using an Ekman dredge (0.022 m2). Twenty-four species, in 18 genera and 12 families were collected. The Shannon-Weaver Index (H´) of species diversity varied from 0.24 to 1.50, evenness between 0.10 and 0.53, and Margalef´s species richness (Dmg) from 1.34 to 2.89. The intertidal area was divided into three different zones according to species distribution and abundance. The first zone was characterized by Donax striatus, Tivela mactroides, Donax denticulatus, Strigilla pisiformis and Pteria colymbus, the second zone by Chione cancellata, Crassinella lunulata, Pitar dione, Macoma breviformis and Codakia orbicularis, and the third zone by Anadara braziliana and Macoma sp. The structure of this distribution occurred throughout the sampling period. Total rainy season abundance was lower than that recorded in the dry season.

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Cómo citar
Delgado, J., Reverol, Y., Godoy, A., & Severeyn, H. (1). Distribution and Seasonal Variation of Intertidal Bivalves on a Sandy Beach at Caimare Chico, Venezuela. Boletín Del Centro De Investigaciones Biológicas, 40(3). Recuperado a partir de https://produccioncientificaluz.org/index.php/boletin/article/view/62
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