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Age and growth of the common guitarfish, Rhinobatos rhinobatos, in Iskenderun Bay (north-eastern Mediterranean, Turkey)

Published online by Cambridge University Press:  25 June 2008

Nuri Başusta*
Firat University, Faculty of Fisheries, 23119, Elazıg/Turkey
Sefa Ayhan Demirhan
Mustafa Kemal University, Faculty of Fisheries, 31040, Antakya, Hatay/Turkey
Erdoğan Çiçek
Gaziantep University, Faculty of Art and Sciences, Department of Biology, 27310 Şahinbey-Gaziantep/Turkey
Asiye Başusta
Firat University, Faculty of Fisheries, 23119, Elazıg/Turkey
Tuncay Kuleli
Çukurova University, Faculty of Fisheries, 01330 Balcalı-Adana/Turkey
Correspondence should be addressed to: Nuri BaşustaFirat University Faculty of Fisheries23119, Elazıg/Turkey email:;


Age and growth of the common guitarfish (Rhinobatos rhinobatos) were estimated from the north-eastern Mediterranean coast of Turkey. A total of 115 common guitarfish (66 females and 49 males) were sampled. Age determinations were carried out using vertebral sections. Alcian blue dying techniques were used to enhance the visibility of the band on vertebrae. The techniques have been used for the first time on elasmobranchs vertebrae successfully in this study. A total of 97 vertebrae of 115 were visible on the vertebral band in this study. Male and female common guitarfish ranged in age from 1 to 15 and 1 to 24 y respectively. Total length ranged from 42 to 147 cm for females and 39 to 124 cm for males.

The relationships between total length (TL) and total weight (TW) were presented as TW = 0.0014*TL3.1672 (R2 = 0.98) for females, TW = 0.0012*TL3.1947 (R2 = 0.98) for males and TW = 0.0012*TL3.1915 (R2 = 0.98) for both sexes. The parameters for von Bertalanffy growth curves were estimated as Linf  = 137.70±9.38 cm, K = 0.159±0.047, to = −2.180 ± 0.90 for pooled data.

Research Article
Copyright © Marine Biological Association of the United Kingdom 2008

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