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Communities and coexistence of benthos in northern limb of Cochin backwaters

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Title Communities and coexistence of benthos in northern limb of Cochin backwaters
 
Creator Devi, K Sarala
Jayalakshmy, K V
Venugopal, P
 
Description 249-254
Occurrence and coexistence of benthic communities of 9 stations in the northern limb of Cochin backwaters where an industrial belt (mostly chemical industries) is located are studied. Polychaetes with 30 species are the most common among groups present at all the stations. Capitella capitata which showed high density near the effluent discharge site is proposed as an indicator of pollution. Dendronereis aestuarina present at all stations and in high densities at sts 5, 6 and 8, can be considered as a pollution resistant species. Lycastis indica, Paraheteromastus tenuis, Telehspia annandalei, chironimid larvae and Pendora flexosa present at st 8, even-though in very low numbers, can be treated as pollution tolerant species. The number and the size of the clusters show a steady decline from sts 1 to 8. Maximum affinity is for adjacent stations and never exceeded 60%. Negative affinity indices obtained are deemed indicative of the varied environmental conditions. Results indicate limited spatial migration and possible niche separation.
 
Date 2016-12-08T09:47:56Z
2016-12-08T09:47:56Z
1991-12
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://nopr.niscair.res.in/handle/123456789/38308
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.20(4) [December 1991]