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Arthropods, 2012, 1(4): 136-143
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Brachyuran crabs diversity in Mudasal Odai and Nagapattinam coast of south east India

Kollimalai Sakthivel , Antony Fernando
Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai -608 502, Tamil Nadu, India

Received 7 June 2012;Accepted 5 July 2012;Published online 1 December 2012
IAEES

Abstract
The brachyuran crabs diversity studied from Mudasal Odai (Lat.11o29'N; Long.79o46'E) and Nagapattinam (Lat.10o46'N; Long.79o59'E) coast of Tamil Nadu, south east India. We recorded 34 species, 15 genera and 7 families in Mudasal Odai and 31 species, 15 genera and 7 families in Nagapattinam coast. The most diverse families are Portunidae (17 species in Mudasal Odai, 15 species in Nagapattinam), and Leucosiidae (5 species in Mudasal Odai, 4 species in Nagapattinam). Out of 15 genera, Charybdis has more number of species (12 species in Mudasal Odai, 9 species in Nagapattinam). Both species (Philyra globosa, Charybdis hoplites) in two coasts, four species (Philyra scabriuscula, Charybdis edwardsi, Charybdis natator, Charybdis variegata) in Mudasal Odai coast and one species (Portunus spinipes) in Nagapattinam coast are dominant. Four species (Charybdis granulata, Charybdis lucifera, Podophthalmus vigil, Portunus spinipes) in Mudasal Odai and two species (Philyra scabriuscula, Portunus gracilimanus) in Nagapattinam are abundant. Three species in two coast, ten species in Mudasal Odai and nine species in Nagapattinam coast are co-abundant. There are nine species in both coasts, fourteen species in Mudasal Odai and seventeen species in Nagapattinam coast are present status. Among the 38 species, four was absent in Mudasal Odai and seven in Nagapattinam coast.

Keywords brachyuran crabs;Mudasal Odai coast;Nagapattinam coast;Portunidae;Philyra globasa;Charybdis hoplites;Portunus spinipes.


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