Age, Growth and Reproduction of Neogobius melanostomus (Pallas 1814) (Perciformes: Gobiidae) in the Southern Black Sea

Authors : Mehmet AYDIN
Pages : 106-117
Doi:10.33714/masteb.784015
View : 38 | Download : 9
Publication Date : 2021-06-05
Article Type : Research Paper
Abstract :Round goby insert ignore into journalissuearticles values( Neogobius melanostomus , Pallas 1814); which belongs to Gobiidae, inhabits in the Black Sea, the Marmara Sea, the Caspian Sea and the rivers that flows into fore stated seas. The main population parameters, such as age, length, sexual composition, length-weight relationship, growth, condition factor, gonadosomatic index and reproduction of N. melanostomus were investigated from coasts of the southern Black Sea in this study. A total of 2408 individuals were sampled between July 2017 and June 2018. Results showed that average length and weight were found 14.97 cm insert ignore into journalissuearticles values(10.50-26.20); and 43.90 g insert ignore into journalissuearticles values(15.28-212.2);, respectively. Sex ratio between female and male was found 1:1.77 insert ignore into journalissuearticles values(P>0.05);. Age of samples varied between one and eight years old. The von Bertalanffy growth parameters were calculated as L ∞ = 26.5 cm, k = 0.1980 year -1 and t 0 = -1.3487 year for all individuals. The length-weight relationship was found as W = 0.0069 TL 3.1972 for all individuals. Total mortality, natural mortality, fishing mortality, growth performance index and condition factor were calculated as 0.625, 0.479, 0.145, 2.143, and 1.66, respectively. Spawning occurs between March and May and the maximum value of gonadosomatic index reached in April. Average relative fecundity was 318.88 number/g insert ignore into journalissuearticles values(124.8-958.9);, while average diameter of eggs was found 2025.58 µm  ±  262.86 insert ignore into journalissuearticles values(1112.0-2703.4);. This study will contribute for information gap on the species as well as provide information source for future studies.
Keywords : Round goby, Age, Growth, Reproductive, Fecundity, Black Sea

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