Growth and exploitation of Salema Sarpa salpa (Linnaeus, 1758) (Sparidae) in the North Aegean Sea, Türkiye

Authors : İsmail Burak DABAN, Gençtan Erman UĞUR, Ali İŞMEN

Pages : 501-515

Doi:10.25092/baunfbed.1181745

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Publication Date : 2023-07-07

Article Type : Research Paper

Abstract :Salema, Sarpa salpa insert ignore into journalissuearticles values(Linnaeus, 1758);, is a herbivorous fish species of the family Sparidae. It is an important predator of benthic algae, especially seagrass Posidonia oceanica. Due to excessive herbivorous behaviour, ecological importance becomes more significant than economical value. Thus, the aim of this study was to contribute scientific knowledge of Salema stock distributed around North Aegean Sea, Turkey with reveal age structure, growth, mortality, and exploitation rates. For this purpose, a total of 412 specimens, varied between 10.2 cm and 38.0 cm TL in length were obtained by commercial gill net fisheries monthly. The length-weight relationship insert ignore into journalissuearticles values(LWRs); was calculated as W=0.01898*TL2.883 insert ignore into journalissuearticles values(r2=0.97);, and growth type was determined as negative allometric in all sexes. The von Bertalanffy growth parameters were calculated as L∞=41.6 cm, K=0.21 y-1, and t0=-1.50 y, and the total mortality insert ignore into journalissuearticles values(Z);, natural mortality insert ignore into journalissuearticles values(M);, fishing mortality insert ignore into journalissuearticles values(F);, and exploitation rate insert ignore into journalissuearticles values(E); were calculated as 2.04, 0.44, 0.81, and 0.65, respectively. The fishing mortality optimum reference point insert ignore into journalissuearticles values(Fopt);, fishing mortality limit reference point insert ignore into journalissuearticles values(Flim);, optimum exploitation rate insert ignore into journalissuearticles values(Eopt); and the length where the maximum yield can be obtained insert ignore into journalissuearticles values(Lopt); were calculated as Fopt=1.02, Flim=1.36, Eopt=0.44, and Lopt=28.6, respectively.
Keywords : Yaş, büyüme, ölüm, referans noktaları, Sarpa, Kuzey Ege Denizi