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Species assemblages and community structure of deep-sea demersal ichthyofauna of the South-eastern Arabian Sea (SEAS)

Published online by Cambridge University Press:  10 July 2017

M. S. Sileesh Open the ORCID record for M. S. Sileesh [Opens in a new window] ,
K. Alphi ,
K. C. Harish  and
V. Viji
M. S. Sileesh
Affiliation:
Kerala University of Fisheries and Ocean Studies, Cochin, India
K. Alphi*
Affiliation:
Kerala University of Fisheries and Ocean Studies, Cochin, India
K. C. Harish
Affiliation:
Kerala University of Fisheries and Ocean Studies, Cochin, India
V. Viji
Affiliation:
Kerala University of Fisheries and Ocean Studies, Cochin, India
*
Correspondence should be addressed to: K. Alphi, Kerala University of Fisheries and Ocean Studies, Cochin, India email: [email protected]
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Abstract

Studies of species assemblages and community structure are of vital importance in the deep-sea realm. Data for the present study were collected during the research expedition of FORV ‘Sagar Sampada’ in the latitude 8.02°N and 11.58°N, longitude 74.16°E and 78.35°E. High Speed Demersal Trawl – Crustacean Version (HSDT-CV) was used for the operations at a depth of 200 and 1000 m. The total catch came to 2148.35 kg from 10 stations. An analysis of the catch composition was made. Total catch was dominated by Priacanthus hamrur (27.66%) followed by Neoepinnula orientalis (15.57%), Psenopsis cyanea (10.05%), Glyptophidium oceanium (3.55%), Lamprogrammus niger (3.17%), Narcine timlei (3.08%), Lamprogrammus sp. (2.6%), Pterigotrygla hemisticta (2.17%). About 76 species recorded from 22 orders were identified. The diversity indices, Cluster analysis, k-dominance plot were analysed using PRIMER v6 software. The diversity indices including Margalef richness index (d), Shanon index (log e2), Pielou's evenness index (J′) and Simpson diversity index (1 − λ) were calculated. Diversity indices were compared with the previous studies in the same area, and this can be a reference point for future studies.

Keywords

Deep-seademersal ichthyofaunacommunity structurediversity indices
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 98 , Issue 7 , November 2018 , pp. 1775 - 1781
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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