Turkish Journal of Fisheries and Aquatic Sciences
2013, Vol 13, Num, 3 (Pages: 541-549)
Age and Growth Characteristics of Marbled Electric Ray Torpedo marmorata (Risso, 1810) Inhabiting Iskenderun Bay, North-eastern Mediterranean Sea
Ömer Veli Duman 1 ,Nuri Başusta 1
1 Firat University, Fisheries Faculty, 23119, Elazig, Turkey
DOI :
10.4194/1303-2712-v13_3_19
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The age and growth characteristic of the marbled electric ray (Torpedo marmorata) was determined inhabiting in
Iskenderun Bay is located in north-eastern Mediterranean Sea. A total of 117 specimens sampled caught 52% were female and
48% were male. The total length to weight relationship was determined as: W=0.0195×L2.9856. This study is the first known
example using known aging methods for this species. The growth parameters that were derived by using the von-Bertalanffy
method for this species were: L∞=57.31cm, k=0.187053 year-1 and to=-0.39231 year-1. According to the Marginal Increment
Analysis it was found that age band growth was annual. This is the first and only known information in regards to the age and
growth of this species.
Keywords :
Marbled electric ray, Torpedinidae, chondrichthyes, staining method, safranin-O