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Coban M.Z.,Firat University | Gunduz F.,Elazig Fisheries Research Institute | Demirol F.,Elazig Fisheries Research Institute | Ornekci G.N.,Elazig Fisheries Research Institute | And 3 more authors.
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2013

Population parameters such as growth, mortality rates, annual catch and stock size of Capoeta umbla (Heckel, 1843) population in Lake Hazar were investigated. Length and weight relationships of the population was W= 0.070xTL2.39 (n= 364; R2 = 0.95) and von Bertalanffy Growth Parameters were estimated as L∞= 53.77 cm; K=0.16; t0=-1.84 and W∞=957.38 g. Natural mortality rate (M) was 0.363 while fishing mortality (F) and total mortality rate (Z) were 0.349 and 0.712, respectively. Annual catch was 25721 kg (107544 individuals) and mean fish size was 28.7 cm (239.4 g). Estimated stock size based on mark and recapture method was 91601 kg (CI(95%): 85163-99061 kg) and 382627 individuals (CI(95%): 355736-413916 individuals). Stock size was also assessed by using length-based cohort analysis and was found to be 95256 kg (CI(95%):55079-263225 kg) and 358105 individuals (CI(95%): 240251-868729 individuals). According to yield-biomass relationships, estimated maximum sustainable yield (MSY) was 27070 kg. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey in cooperation with Japan International Cooperation Agency (JICA), Japan. Source


Coban M.Z.,Firat University | Turkgulu I.,Elazig Fisheries Research Institute | Yuksel F.,Tunceli University | Celayir Y.,Aquatic Products Branch Office of DSI | And 4 more authors.
Turkish Journal of Fisheries and Aquatic Sciences | Year: 2012

This study was carried out in Luciobarbus esocinus obtained from Keban Reservoir (Elazi{dotless}ǧ) between March 2008 and October 2009. During the research, it was determined that the percentage of male, female and undefined individuals from 187 L. esocinus were 45.455%, 37.433% and 17.112% respectively. The ages of population were distributed between I and XVII. The lengths of the individuals ranged from 23.0 to 112.4 cm and the weight of them ranged from 118 to 18042 g. The length and weight equation for population was determined as W all individuals = 0.0057TL 3.2187 (n= 187, r= 0.98). The highest GSI values of both sexed were obtained in March and these values were decreased rapidly after this month. It was determined that the condition factor increased until age 5 and then, it decreased respectively. © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey in cooperation with Japan International Cooperation Agency (JICA), Japan. Source

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