e - poz 2 - Central Institute of Brackishwater Aquaculture

lhJm md tabqodr Onty m spxlcr m6emd by Vlllonu rwrmrdn lmnsd fhr bbvalvr popllam w h nmne $en nmvly Mdnodu Idmdau~. Mdmpm sp. Indspknortur mntu* and V r n w (onrd ttnRwrclpaf popvlnm (TIMCI The pcmanmn pnod dnmd Ihr h&rsl wdm d tnvah*, nd prfmpdr Abut#Is% d the wrrmpod capulnm wa mnt- by spxm Mdanonln tvbmulaur *. Indoplrwxb~~ cxu,turro I I %I howd hr rntn!mum pmn y mdcm The udv clrr nature d liv wbslmwn wllh h~@t un(ma c~ttxmlmtmt rt lotmr 1.3 and 4 d be IIW maa, hw Ihr hr b w r nd d~wnnry b ttn frunr In fhr ahrr unlm, thrrandy "dun d rtr Mom nd mnprraNtly law qanc -1 h w d h&wr lrunrl ~nrdrmr mnd rbunddncvFish and FisheriesTwenty six landing centres were identified from around the fresh water sector ofthe lake and data on the total landings of fish and prawn were collected during thestudy period from these areas. About 38 species of fishes and 4 species of prawnswere identified from the study (Table 7). The major fish species recorded from theinvestigation were Erroplus suratensis, f. rnaculatus, Channa rnarulius, Lahodussumieri, Puntius sp. Lutianus argentirnaculatus, Mystus sp., Tachysurus sp. andHernirarnphus sp.The fishery of M. rosenbergii, which was to the extent of 305 tonnes during 1960-61 (Raman, 1965) in the lake, was reduced to about 39tonnes by 1987-88 (Kurup,1989). This reduction is attributed to the barrage as it prevents the returnmigration of the spent brooders and the upward migration of the post larvae to theriven. The barrage has posed an obstacle to them during their peak migration InNovember to February. The fishery has, of late, shown some recoven/ due to thereduction the closure season from 6 to 4 months, and also due to the damagedcondition of some of the sluices.