Age, growth, and gonadosomatic index (gsi) of mediterranean horse mackerel (trachurus mediterraneus steindachner, 1868) in the eastern black sea

WOS: 000265870500005The aim of this study was to calculate the basic population parameters of Trachurus mediterraneus off the coast of the Eastern Black Sea. Average total length was estimated as 13.52 +/- 1.884 cm for the entire population, 13.08 +/- 1.594 cm for males, and 13.62 +/- 1.804 for females. Average weight was 20.27 +/- 8.819 g for the entire population, 18.65 +/- 7.626 g for males, and 2131 +/- 9.184 g for females. Age of the fish ranged between 0 and 5 years. Length-weight, age-length, and age-weight relationships were estimated for the population, where W = 0.0089 x L-2.9552: L-t = 26.09 (1 - e(-0.125(t + 4.002))); and W-t = 136.56 (1 - e(-0.125(t + 4.002))) Total mortality rates were Z = 3.73 year(-1) and M = 0.29 year for natural deaths. and F = 3.44 year(-1) for fishing mortality.Scientific Research Fund of Karadeniz Technical UniversityThis study was financially supported by the Scientific Research Fund of Karadeniz Technical University. We would also like to thank Prof. Dr. Ertug Duzgunes for his invaluable comments about this study