FIRST OBSERVATION OF THE EMBRYOS OF SPINY BUTTERFLY RAY, GYMNURA ALTAVELA (LINNAEUS, 1758) (CHONDRICHTHYES: GYMNURIDAE) FROM EASTERN MEDITERRANEAN, A SPECIES CRITICALLY ENDANGERED
Küçük Resim Yok
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Parlar Scientific Publications (P S P)
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the morphometric identification of a pregnant Gymnura altavela and its three embryos, which is incidentally captured by fishermen with trammel nets on April 2, 2018, in the Gulf of Izmir in the Aegean Sea, Turkey, was carried out. In the study, 18 morphometric measurements of the pregnant specimen and three embryos were compared with each other. The disc width (DW), total length (TL), and weight (W) of the pregnant specimen were 135.5 cm, 90.0 cm, and 20.200 g, respectively. Of the embryos obtained from the right uterus of the female specimen, 1 was male and 2 were female. The disc width of the embryos varied between 28.6 cm and 30.9 cm, total length of the embryos varied between 22.2 and 22.9 cm, and the weight of the embryos varied between 289.51 and 296.13 g. The results obtained with the morphometric measurements were evaluated using discriminant analysis and the results revealed that female and male embryos and the adult specimen had a 100% discrimination ability.
Açıklama
Anahtar Kelimeler
Gymnura altavela, Spiny butterfly ray, Embryos, Morphometry, Endangered
Kaynak
Fresenius Environmental Bulletin
WoS Q Değeri
Q4
Scopus Q Değeri
Cilt
28
Sayı
4A
