Dinamica poblacional de Donax dentifer (Veneroida: Donacidae) en Bahia Malaga, Pacifico colombiano durante el fenomeno El Nino 1997/1998 / Population dynamics of Donax dentifer (Veneroida: Donacidae) in Bay of Bahía Málaga, Colombian Pacific

RESUMO

Donax dentifer is a dominant member of the sandy beach communities of the Colombian Pacific coast. A population of this bivalve was monthly sampled in Playa Chucheros at the Bay of Málaga, Colombian Pacific, between August 1997 and July 1998, during the "El Niño 1997/1998" phenomenon. Quantitative samples were taken in perpendicular and parallel to the coastal line transects to determine the population density and a length-frequency distribution. Qualitative samples were taken to study the reproduction and monthly length weight relationship. Sea surface temperature, dissolved oxygen, salinity and pH in the water was monthly registered in the sampling station. Additionally, a tagging-recapture experiment was performed to growth estimations. Results indicate a continuous reproduction cycle with two annual spawning seasons in December and March...