Mortality Ratio and Stock Analysis of Vimba (Vimba vimba tenella (Nordmann,1840)) Population ?n Karacaoren I Dam Lake (Burdur- Turkey)

摘要

Inthisstudy,808vimba(Vimbavimbatenella(Nordmann,1840))individualswerecapturedduringOctober1996-April1998fromKaraca?renIDamLakeandmortalityratioandstocksizewereestimated.AgedistributionofV.v.tenellavariedfrom0-VIIand73.51%oftheobservedsampleswerebelongingtoI-IIagegroup.Theforklengthwasrangedbetween11.7-27.8cm.ThegrowthparametersofvimbapopulationwerefoundasL?=43.39cm,K=0.0863andto=-4.7615.Themortalityratesofvimba,accordingtoconstantparametersystemwerecalculatedas;Z=0.71y-1,M=0.27y-1andF=0.44y-1.ThesurvivalrateoftheVimbaisdeterminedas49.16%,exploitationrateas62%.Meannumberandmeanbiomassoffishinpopulation,biggerthan18cmlength,havebeenestimatedas762328and95044kgrespectively.Withthesimulationsoffishingmortalityratesbelongtoeachlengthgroup,itwasdeterminedthatmaximumsustainableyield(MSY)couldbeobtainedwithincrease40%increaseofthepresenteffort.