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Abundance and diversity of by-catch molluscs from Cuddalore coast

Published online by Cambridge University Press:  08 June 2010

Arjunan Babu ,
Kaila Kesavan ,
Duraisamy Annadurai  and
Santhanam Rajagopal
Arjunan Babu*
Affiliation:
Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai–608 502, India
Kaila Kesavan
Affiliation:
Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai–608 502, India
Duraisamy Annadurai
Affiliation:
Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai–608 502, India
Santhanam Rajagopal
Affiliation:
Centre of Advanced Study in Marine Biology, Annamalai University, Parangipettai–608 502, India
*
Correspondence should be addressed to: A. Babu, Centre of Advanced Study in Marine Biology, University of Annamalai, Parangipettai–608 502, India email: [email protected]
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Abstract

The marine biodiversity of the south-east coast of India is rich and varied. This article deals with the availability of molluscs from the trash fish from the Cuddalore coast, Tamilnadu, south-east coast of India, viz., Mudasalodai (11°29′N 79°46′E) and Cuddalore (11°42′N 79°46′E) landing centres. A survey has been done to estimate the composition of molluscs from October 2007 to September 2008. About 250 trawlers from Cuddalore and 200 trawlers from Mudasalodai were engaged in fishing activity every day up to a depth of 30–80 m. A total of 59 species belonging to 35 genera from 25 families were recorded at Station 1 and 57 species belonging to 32 genera from 24 families were identified at Station 2. The most diverse families were Muricidae, Conidae, Arcidae and Veneridae at both stations. The Shannon diversity index of gastropods varied from 2.27 to 4.71 and bivalves varied from 1.82 to 2.52, the species richness of gastropods varied from 2.75 to 6.27 and bivalves varied from 1.42 to 1.75. The species evenness in the gastropods was between 0.58–0.90 and 0.57–0.74 in gastropods and bivalves respectively. Seasonal contribution of gastropods attained maximum in pre-monsoon and minimum during the summer at both stations. At Station 1 bivalves attained maximum in pre-monsoon and minimum was recorded during monsoon. Seasonal contribution of bivalves at Station 2 was high in post-monsoon and minimum in the summer.

Keywords

molluscsbiodiversityconservationtaxonomyCuddalore
Type
Research Article
Information
Marine Biodiversity Records , Volume 3 , June 2010 , e61
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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