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Length–Weight Relationships of Elasmobranch Species From Gökçeada Island in the Northern Aegean Sea

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Abstract

Lenght – weight relationships (LWRs) were estimated for eight elasmobranchs (five sharks and three batoids) off the Gökçeada Island, Northern Aegean Sea. All specimens were collected by commercial bottom trawl at depths ranging from 120–400 m between February and November 2019. A total of 2991 individuals (1143 Scyliorhinus canicula, 110 Scyliorhinus stellaris, 795 Galeus melastomus, 575 Etmopterus spinax, 48 Squalus acanthias, 255 Raja clavata, 29 Raja miraletus, 36 Dipturus oxyrinchus) were sampled and studied. Results showed that most species had positive allometric growth and the values of parameter b ranged between 2.93 and 4.01. Furthermore, five shark (Mustelus asterias, Mustelus mustelus, Centrophorus granulosus, Hexanchus griseus, Oxynotus centrina) and eight batoid species (Dasyatis pastinaca, Gymnura altavela, Pteromylaeus bovinus, Leucoraja naevus, Rostroraja alba, Myliobatis aquila, Torpedo marmorata, Tetronarce nobiliana) were described, yet because they amounted to less than ten, only their respective descriptive statistics were determined.

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Acknowledgements

The authors would like to thank the crew of the fishing vessel “Yalçınoğlu 1” for their help and collaboration. The authors are grateful to Dr. İsmail Burak DABAN, Gençtan Erman UĞUR, Sibel ATAK, Onur FURKAN İPEK and Buminhan Burkay SELÇUK for their assistance in obtaining the fish samples and in the laboratory. This paper was derived from the doctoral research titled “Determination of growth and reproduction characteristics of some elasmobranchii in the North Aegean Sea”. All the data were obtained from Project, which was supported by The Scientific and Technological Research Council of Turkey (TUBITAK), Project No: 119Y060.

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  1. Graduate School of Natural and Applied Sciences, Department of Marine Science and Limnology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey

    Koray CABBAR

  2. Marine Science and Technology Faculty, Department of Marine Science and Limnology, Çanakkale Onsekiz Mart University, Çanakkale, Turkey

    Cahide Çiğdem YIĞIN

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CABBAR, K., YIĞIN, C.Ç. Length–Weight Relationships of Elasmobranch Species From Gökçeada Island in the Northern Aegean Sea. Thalassas 37, 497–504 (2021). https://doi.org/10.1007/s41208-021-00350-z

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