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|Title: ||Benthic polychaetes as good indicators of anthropogenic impact|
|Authors: ||Sivadas, S|
|Keywords: ||Harbour activities;Polychaete;Diversity;Opportunistic species;Goa;West coast of India|
|Issue Date: ||Jun-2010|
Seven stations were sampled within the
Mormugao harbour area for benthos and environmental variables from September
2003 to July 2004. A total of 71 polychaete taxa were identified from the area.
Polychaete abundance, biomass and species number was highest during post
monsoon, mainly due to new recruitment. Pre monsoon is the most stable period
for community development when, the fauna was dominated by opportunistic
deposit feeding polychaete species. Average abundance ranged from 652-4096 ind m-2
reported at channel and harbour station respectively. Harbour station was
dominated by P. pinnata, Magelona sp., Tharyx sp. and Cossura
sp. Univariate and multivariate analyses showed clear demarcation of outer
harbour, inner harbour and channel stations. Correlation of physico-chemical and biotic parameters did not show a
significant correlation. Dominance of opportunistic deposit feeding
species and low polychaete diversity in the inner harbour indicate negative
impact of harbour activities on the species composition.
|ISSN: ||0975-1033 (Online); 0379-5136 (Print)|
|Appears in Collections:||IJMS Vol.39(2) [June 2010]|
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