• SAWMIYA UDAYAN
• SREEJA. J

Abstract: Kallada River is one of the major rivers in Kerala, which is home to some endemic fishes of Western Ghats. The present study investigated the ichthyofaunal composition, diversity, and distribution in different regions of Kallada River. Sampling was carried out monthly from Jan 2013 to Dec 2013. Six sites were sampled covering downstream, midstream and upstream regions. Specimens were collected using cast net and scoop net. Fishes collected were identified using relevant taxonomic guides. Physico-chemical characteristics of the sites and biodiversity in different stretches of the river were assessed. The PCA analysis showed the two downstream regions are homogenous in terms of the physico-chemical parameters while midstream and upstream regions are more similar. The annual fish composition comprised of 31 species, from 17 genera and 12 families. Species from Cyprinidae family dominated in all communities of Kallada River ecosystem except downstream. Dawkinsia filamentosa was the common species found in all parts of the river regardless of the physico-chemical differences while Dawkinsia exclamatio was rare found only in the upstream regions in a short range. six stations studied the highest value of species richness and diversity was observed in Enathu (mid-stream), Thenmala and Kulathupuzha (upstream region) during all three seasons. This region showed greater heterogeneity in physical habitat when compared to other sites. The downstream region showed low diversity as, continuous sand mining activities and indiscriminate fishing activities over past few decades have resulted in a homogenous habitat and loss of fish diversity. Conservation and management strategies are required for protection of fish species inhabiting this water body.

Western Ghats, fish community, diversity, idiosyncratic

"ICHTHYOFAUNAL DIVERSITY OF KALLADA RIVER IN RELATION TO THE PHYSICO-CHEMICAL PARAMETERS AND HABITAT COMPLEXITY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.479-486, April-2019, Available :http://www.jetir.org/papers/JETIR1904784.pdf

"ICHTHYOFAUNAL DIVERSITY OF KALLADA RIVER IN RELATION TO THE PHYSICO-CHEMICAL PARAMETERS AND HABITAT COMPLEXITY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp479-486, April-2019, Available at : http://www.jetir.org/papers/JETIR1904784.pdf