Polychaete community structure of Vasishta Godavari estuary, east coast of India

Rao, D S and Rao, M Srinivasa and Annapurna, C (2009) Polychaete community structure of Vasishta Godavari estuary, east coast of India. Journal of the Marine Biological Association of India, 51 (2). pp. 137-144.

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Abstract

The community structure of polychaete fauna from the Vasishta Godavari estuary was analyzed in this study. The data presented in this paper were collected during 1976 - 78 and published in 1983, and now re-analysed using PRIMER 6.1, CANOCO 4.5. The polychaetes were collected from a 16 km stretch of the lower Vasishta Godavari estuary (16o18’N lat., 81o42’E long.) during flood, summer and recovery seasons at 6 permanent stations. Altogether 216 sediment samples were analysed and 73 polychaete taxa were identified. Polychaete diversity was higher (Shannon-Wiener H’: 1.94±0.28) in samples from recovery season relative to summer season (H’: 1.54±0.44) and flood season (H’: 1.44±0.024). Using multivariate statistical techniques two polychaete associations could be recognised from the Vasishta Godavari estuary, namely Heteromastus similis, Nephthys oligobranchia and Indonereis gopalai assemblage Group 1 (samples from recovery and summer season) and Group 2 (samples from flood season). Group 2 did not reveal any particular species from flood season samples. Canonical correspondence analysis (CCA) showed that sand, salinity, clay and temperature have influenced the polychaete distribution. This study therefore provides key information on the biodiversity of polychaete communities of the Vasishta Godavari estuary.

Item Type:Article
Uncontrolled Keywords:Polychaete community; Multivariate analysis; Canonical correspondence; Vasishta Godavari estuary
Subjects:Marine Biology > Polycheate
Marine Biology > Phytoplanktons
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:2167
Deposited By:Dr. V Mohan
Deposited On:09 Aug 2010 17:28
Last Modified:25 May 2012 15:26

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