Aspectos populacionais de Tellina lineata Turton, 1819, (bivalve-tellinidae) da região de meso-litoral da praia de Bom Jesus dos Pobres, Saubara - Ba

Abstract

This study aimed to perform a descriptive analysis of the length and total weight frequency distribution of the species Tellina lineata and the evaluation of reproductive aspects of species, sex ratio, minimum size at first maturity and macroscopic stages of gonadal development. The samples were carried out monthly in a number of twelve, in periods of low water in the mesolitoral region of Bom Jesus dos Pobres Beach, from november, 2009 to october, 2010. The Bom Jesus dos Pobres Beach is located in Saubara city, Baía de Todos os Santos. After the samples have been collected, Biometry and statistical individuals processing were performed through the Bioestat 5.0, in order to obtain satisfactory results for such purposes. During the sampling were collected 529 individuals of T. lineata on Bom Jesus dos Pobres Beach and from biometric measurements was got the descriptive statistic for the total length, where it was possible to observe an annual average length (Lt, mm) of 27.83 mm (+4.68), and annual width from 7.45 mm year in May / 2010 to 35.11 mm in February/2010. The annual average weight of individuals (Wt, g) on Bom Jesus dos Pobres Beach was 2.03g (+0.87), and the amplitude from 0.03 g, in may, 2010 to 4.17 g in september, 2010. The coefficient of variation on the Beach for all results showed heterogeneity. The sex ratio (female: male) was 1: 1.09. The length at first sexual maturity of individuals was 21.2 mm. There was a prevalence of individuals, in filling and full stage, characterizing the occurrence of continuous removal of gametes.