Age and growth of adult gilthead seabream (Sparus aurata L.) in the Aegean Sea


Akyol O. , Gamsiz K.

JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM, cilt.91, ss.1255-1259, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 91 Konu: 6
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1017/s0025315410001220
  • Dergi Adı: JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
  • Sayfa Sayıları: ss.1255-1259

Özet

Age and growth of adult gilthead seabream, Sparus aurata were determined from 332 specimens (total N = 476), collected from purse-seiners, in the south-eastern Aegean Sea from November 2006 to January 2007. The fork length and body wet weight ranged from 26.5 to 51.5 cm (mean: 36.6 +/- 0.18) and from 375 to 2600 g (mean: 1009.2 +/- 14.16), respectively. Age groups were varied between 2 and 7. Growth parameters were estimated as L(infinity) = 64.97 +/- 12.93 cm, K = 0.14 +/- 0.07 year(-1), t(0) = -2.47 +/- 1.09 year(-1), and index of phi-prime was Phi' = 2.772 +/- 0.51. The length - weight relationship equation of all fish was calculated as W = 0.0515 x L(2.737) (r(2) = 0.95). The mean condition factor was estimated as 2.058. Mortalities (M, F and Z) and exploitation rate (E) of gilthead seabream from the Aegean Sea were 0.34 year(-1), 0.77 year(-1), 1.11 year(-1) and 0.69 year(-1), respectively. The result of E indicated that the population was overexploited.