Indian Journal of Animal Research

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Research Article

Indian Journal of Animal Research, volume 54 issue 3 (march 2020) : 367-372

Elasmobranch diversity, conservation and management along Wadge Bank, South India

K. Karuppasamy, P. Jawahar, S. David Kingston, V.K. Venkataramani, V. Vidhya
1<div style="text-align: justify;">Fisheries College and Research Institute,<br />Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Tuticorin-628 008, Tamilnadu, India.</div>
Cite article:- Karuppasamy K., Jawahar P., Kingston David S., Venkataramani V.K., Vidhya V. (2019). Elasmobranch diversity, conservation and management along Wadge Bank, South India. Indian Journal of Animal Research. 54(3): 367-372. doi: 10.18805/ijar.B-3778.

ABSTRACT

The study was undertaken to document the elasmobranch diversity and their abundance along Wadge Bank. Species were collected fortnightly during June 2015 to May 2016 from three landing centres viz., Chinnamuttom,Colachel and Vizhinjam of Wadge Bank. A total of 1,575 specimens were collected during the period and 44 species were identified belonging to 8 orders, 13 families and 25 genera. Among the recorded \families,Carcharhinidae is the most dominant family with 12 species. The Colachel landing centre was rich in diversity with 43 species followed by Chinnamuttom 39 species and Vizhinjam26 species. The highest Shannon Weiner diversity (H’ value) was observed at Colachel (4.17) followed by Chinnamuttom (4.11) and Vizhinjam (3.76). The Margalef’s species richness (‘d’) value was assessed at Colachel (4.55) followed by Chinnamuttom (4.01) and Vizhinjam (2.91). The Pielou’s evenness (J’) estimated was 0.7786, 0.7700 and 0.8005respectively, for Chinnamuttom, Colachal and Vizhinjam. The highest taxonomic diversity value was observed at Colachel (60.33) and the lowest during at Vizhinjam (54.08). Among the three landing centres studied, the total phylogenetic diversity (sPhi+) was found to be the lowest at Vizhinjam (940) and highest at Colachel landing centre (1720). Bray Curtis similarities measure was also calculated, fish communities were separated into several clusters based on seasons. The conservation of elasmobranchs and the management measures to be followed along the Wadge Bank is also discussed.

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