e - poz 2 - Central Institute of Brackishwater Aquaculture
e - poz 2 - Central Institute of Brackishwater Aquaculture
e - poz 2 - Central Institute of Brackishwater Aquaculture
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Several literatures are available on the distribution and diversity <strong>of</strong> benthic fauna inthe Vembanad lake during the prebanage phase, and that too concentrating onthe Cochin area. Some d the earlier works in this dimtion include that <strong>of</strong> Ansari(1974, 19773, Desai and Krishnankutty (19671, Covindankutty (1972), Jayasree(19711, Kurian (1967,1971, 19721, and Remani (1 979). The notable contributionsduring the post barrage phase were by Aravindakshan et a/. (1992), Gopalan et a/.(1987) and Nair and Sarala Devi (1986). Sarala Devi et a/. (1991) elaborated thecoexistence <strong>of</strong> different benthic communities in the northern limb <strong>of</strong> Cochinbackwaters. Nair et a/. (1983) gave an account on the population dynamics <strong>of</strong>amphipods in Cochin backwater area. Devassy and Copinathan (19701, Kurian etal (1975) and Gopalan et al (1987) undertook some <strong>of</strong> the investigations on thebenthic fauna extending right from Cochin to Alappuzha.PRIMARY PRODUCTION : Stud~es on the prtmary product~on and 11s relat~onw~th other env~ronmental parameters In the Cochln backwaters have been a majorarea <strong>of</strong> research by several workers The Important works In th~s d~rect~on are theesttmat~on <strong>of</strong> plant puynents by Quas~m and Reddy (1967), the solar red~at~on andrelated aspeas by Quaslm et a1 (1968). In depth stud~es on the gross and netproductlv~h/ by l~ght and dark bottle method as well as C" methods wereundertaken by Quas~m et a/ (1969) Th~s study has brought out th~ product~onresplratlon and ass~m~latlon rates In relat~on to the env~ronmental parameten, thrsolar rad~atlon, chlorophyll contents, and the blologlcal componentsPOLLUTION : Sarala Dev~ et a1 (1979), Unn~than ef a1 (1975) and V~jayan el a/(1976) documented the effect <strong>of</strong> organlc pollution due to ~ndustrlal pollut~on onsome water qual~ty paramers In Coch~n backwater. Reman1 el dl (1980) studiedthe qual~ty <strong>of</strong> sedlment cn Coch~n backwaters In relat~on to pollut~on aspectsSarala Dev~ et a1 (1986) conducted elaborate stud16 In the Coch~n backwater onthe benth~ communlttes under the Impact <strong>of</strong> lndustr~al pollut~onFISHERY: Investigations on the distribution and abundance <strong>of</strong> fishes <strong>of</strong> Vembanadldke extending from Cochin to Alappuzha have been done by a number <strong>of</strong>workers. Pilla~ (1960) made a record <strong>of</strong> the distribution <strong>of</strong> the Hilsa rlrsha In thelake while George (1965) reported the unusual occurrence <strong>of</strong> mackerel. Shetty(1965) made a comprehensive description <strong>of</strong> the fishery practice along w~th alisting <strong>of</strong> the commercially important fish and prawn species <strong>of</strong> the Vembanad