DISTRIBUTION OF OCYPODE QUADRATA (FABRICIUS, 1787) ON SANDY BEACHES OF NORTHEASTERN BRAZIL

Abstract

The abundance, distribution and morphometry of Ocypode quadrata (Fabricius, 1787) burrows were analyzed in twelve sandy beaches of Pernambuco (NE- Brazil; 7º51’- 8º45’30” S; 34º49’ 35º06’ W), with different grades of anthropic impact. This species is typical of the supralittoral fringe, which are the more impacted beach´s area due to the recreational activities. The density of O. quadrata burrows was higher at non-urban beaches, and near the strand line. The burrow diameter increases land ward, with strong correlation with organic matter mass. This analysis was a quick and easy way to identify anthropic impact, but other studies specifying the impacts and the local factors that are influencing the distribution of ghost crabs are necessary.