ESTUARINE FISH DIVERSITY OF MANAKUDY ESTUARY, KANYAKUMARI DISTRICT, TAMIL NADU, INDIA

ESTUARINE FISH DIVERSITY OF MANAKUDY ESTUARY, KANYAKUMARI DISTRICT, TAMIL NADU, INDIA.

Pavinkumar*, P. Jawahar and H. S. Mogalekar
Department of Fisheries Biology and Resource Management, Fisheries College & Research Institute,
Tamil Nadu Fisheries University, Thoothukudi-628 008, Tamil Nadu, India.
[Corresponding author E-mail*: pavinmfsc@gmail.com]
Received: 11-07-2015 Accepted: 29-08-2015
Abstract:
The investigation was contacted for 12 months (September 2013 to August 2014) to document the fish diversity and ecological status of Manakudy estuary in the Kanyakumari district of southern Tamil Nadu. During the study period 77 number of fish species were recorded which were coming under 41 families belongs to 11 orders. Most dominant fish species mainly belonged to Perciformes, Clupeiformes and Siluriformes orders. Average seasonal species abundance data used as input for calculating various biodiversity indices including Shannon – Wiener diversity ranged from 3.3 to 4.1, Margalef’s species richness ranged from 7.07 to 13.45, Pielou’s evenness ranged from 0.960 to 0.973, Taxonomic diversity ranged from 80.22 to 84.83, Average taxonomic distinctness index ranged from 83.06 to 86.72, Variation in taxonomic distinctness index ranged from 320 to 368 and Total phylogenetic diversity ranged from 1966 to 3966 (PRIMER v6 software). Observed values for various biodiversity indices indicated relatively stable and rich fish diversity for the Manakudy estuary.

Keywords: fish, Diversity, Manakudy estuary,  Margalef’s species richness, Shannon – Wiener diversity

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