Age, Growth and Mortality Rates of Symphodus tinca (Osteichthyes: Labridae) in Izmir Bay (NE Aegean Sea)
Makaleler > Tam Makale · 2024
Yazarlar: Gülnur METİN, Okan AKYOL
Aquatic Sciences and Engineering, ESCI İndekslerine Giren Dergi, Uluslararası, DOAJ (Directory Of Open Access Journals), 2024, cilt 39, ss 255-260
Özet
<p>A total of 373 Symphodus tinca specimens were obtained from small-scale fisheries in January 2017</p><p>- December 2018 off Urla coasts (Izmir Bay), north-eastern Aegean Sea. The length and weight</p><p>distribution of all S. tinca specimens ranged from 7.8 to 24.5 cm TL (mean: 14.4 ± 0.12) and from 6.6</p><p>to 209.3 g (mean: 43.2 ± 1.30), respectively. The female – male ratio was 1:0.41. The weight-length</p><p>relationship parameters (a, b, r2) were calculated to be 0.0175, 2.9023 and 0.9629, respectively. The</p><p>age of S. tinca was determined to be between 0 and V years. The von Bertalanffy growth parameters</p><p>were L∞ = 39.06 ± 23.57 cm, K = 0.14 ± 0.14, and t0 = -1.77 ± 0.77. In addition, the Von Bertalanffy</p><p>Growth Formula for length is given by the following equation: Lt = 39.06 [1 – e -0.14 (t + 1.77)]. Thus, the</p><p>growth performance (Φ`) was estimated as 2.32. The values of mortality and exploitation rates of S.</p><p>tinca are 1.015 (Z), 0.380 (M), 0.635 (F) and 0.626 (E), respectively. These results indicate that stocks</p><p>of S. tinca in the Bay of Izmir are overexploited.</p><p><br></p>