Estructura de tallas y proporción sexual de Anadara tuberculosa y Anadara similis en una reserva de manglares al noroeste de Ecuador

• Autores: Luis Flores, Roberto Licandeo
• Localización: Revista de biología marina y oceanografía, ISSN 0718-1957, ISSN-e 0717-3326, Vol. 45, Nº. 3, 2010, págs. 156-161
• Idioma: español
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• Resumen

  • Shell length frequency distribution (SLFD) and sex ratio of a subpopulation of the mangrove cockles Anadara tuberculosa and Anadara similis were analyzed from natural beds in the Cayapas-Mataje Ecological Mangrove Reserve, Ecuador. The SLFD was different between sexes for both species; females were larger than males.

    Subpopulations of A. tuberculosa and A. similis were dominated by females throughout the year. The overall sex ratio was 2.6:1 (female: male), although with variations in the monthly samples, from 1.2:1 to 5.9:1 in A. tuberculosa and 1.9:1 to 5.3:1 in A. similis. Possibly, these results may be due to differential growth rate between sexes and environmental factors along the year.