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

Published online by Cambridge University Press:  01 September 2010

Okan Akyol  and
Kutsal Gamsiz
Okan Akyol*
Affiliation:
Ege University Faculty of Fisheries, 35440 Urla, Izmir, Turkey
Kutsal Gamsiz
Affiliation:
Ege University Faculty of Fisheries, 35440 Urla, Izmir, Turkey
*
Correspondence should be addressed to: O. Akyol, Ege University Faculty of Fisheries, 35440 Urla, Izmir, Turkey email: okan.akyol@ege.edu.tr
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Abstract

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∞ = 64.97 ± 12.93 cm, K = 0.14 ± 0.07 year−1, t0 = −2.47 ± 1.09 year−1, and index of phi-prime was Φ′ = 2.772 ± 0.51. The length–weight relationship equation of all fish was calculated as W = 0.0515 × L2.737 (r2 = 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−1and 0.69 year−1, respectively. The result of E indicated that the population was overexploited.

Keywords

gilthead seabreamSparus aurataage and growthmortalityAegean Sea
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 91 , Special Issue 6: Fish Ecology , September 2011 , pp. 1255 - 1259
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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