Determination of Growth and Reproduction Characteristics of Garfish (Belone Euxini Günther, 1866) in the South Black Sea
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Serap Samsun [1] ; Naciye Erdoğan Sağlam [1]
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[1] Ordu University
Ordu University
Turquía
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- Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 40, Nº. 2, 2024, págs. 1041-1051
- Idioma: inglés
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Resumen
In this study, it was aimed to determine some basic population parameters (age, length, sex composition, length-weight relationship, age-length relationship, growth parameters, condition factor, GSI) of garfish (Belone euxini, Günther, 1866) in the southern Black Sea region coasts. A total of 917 fish were sampled in the study, and their average length and weight were determined as 37.31 ± 0.147 cm, 58.74 ± 0.876 g. The ages were between 1 and 7 and 40.89% of fish consisted of 3 years old. Sex ratio (F:M) is determined as 1:1.81. Length-weight relationship equations W = 0.0005*L3.196, W = 0.0009*L3.040, W = 0.0005*L3.196 for females and males and all, respectively. Asymptotic length (L∞) and the growth coefficient (k) were estimated at 78.20 cm and 0.119 year− 1 for females, 69.82 cm and 0.120 year− 1 for males and 92.06 cm and 0.082 year− 1 for all indivuduals. Instantaneous total mortality, natural mortality and fishing mortality rates were calculated as Z = 1.02 year–1, M = 0.16 year–1, and F = 0.86 year–1 for combined sexes. Exploitation rate was E = 0.84. The population of Belone euxini was affected by fishing during the study period, according to the estimated E values. According to the GSI values calculated for Belone euxini, it was determined that reproduction started in July and continued until October.
