Conchiliometry of the Arcidae Family (Mollusca / Bivalvia) from three beaches of Itinguçu State Park, Peruíbe (BR). Laura Roberta Sarmento de Barros, Álison Luis Cara, Sueli Silva Souza, Walter Barrella

Abstract

 Species of the Arcidae family (Mollusca / Bivalvia) are confusing, in particular, for presenting ecophenotypic variations, to better adapt to environmental dynamics. In this study we used the morphometric approach that allows the comparison of their morphological patterns. The shells were collected by the 1m² plot method, in beaches belonging to Itinguçu State Park, Peruíbe (BR). In total there were 131 (one hundred and thirty-one) copies found: 75 (seventy-five) at Guarauzinho beach, 31 (thirty-one) at Guaraú and 25 (twenty-five) at Arpoador beach. Density, temperature, water salinity and pH were measured through the samples obtained at the collection points. After identification of the specimens, the following measurements were taken using a caliper: shell length (CC), shell height (AC) and shell width (LC). These data were analyzed, mean, min / max and standard deviation were recorded, in addition to the Pearson correlation coefficient. The Anadara genus was the only genus found in the region and Anadara brasiliana was the most collected species in the three beaches, obtaining the highest averages for all measurements. The morphometric data obtained for this study helped to discriminate genera and species, supporting the identifications. This subject still needs further research in order to reveal greater differences and more specific characteristics of these species.