A case of hermaphroditism in Tortonese’s stingray, Dasyatis tortonesei (Elasmobranchii: Rajiformes: Dasyatidae) from the lagoon of Bizerte, Tunisia

• Autorzy: Capape C. , El Kamel-Moutalibi O. , Mnasri N. , Boumaiza M. , Reynaud C.
• Języki publikacji: EN

Abstrakty

EN

A normal hermaphrodite Tortonese’s stingray, Dasyatis tortonesei Capapé, 1975, captured in the brackish Lagoon of Bizerte (north-eastern Tunisia) is described in this note. It was a large specimen measuring 685 mm total length, 350 mm disk width, and 2190 g of the total body mass. The specimen externally presented medial cuspidate tooth rows on both jaws, and two claspers were present, that were rigid and calcified although shorter than those observed in normal specimens. The dissection of the abdominal cavity revealed on each side, an ovary normally developed that contained yolked oocytes, a complete genital tract and an uterus less developed than in normal adult. Conversely the testes were rudimentary, both Leydig’s glands were developed and a complete, slightly convoluted, male duct existed on the left side only. In all, 13 cases of normal (4) and abnormal (9) hermaphroditism, including the Tunisian D. tortonesei, have been found in batoid species, to date, confirming that the phenomenon is very rare among these chondrichthyan fishes.

• Wydawca: -
• Czasopismo: Acta Ichthyologica et Piscatoria
• Rocznik: 2012
• Tom: 42
• Numer: 2
• Opis fizyczny: p.141–149,fig.,ref.

Twórcy

autor

Capape C.

• Laboratoire d’Ichtyologie, Universite Montpellier II, Sciences et Techniques du Languedoc, Montpellier, France

autor

El Kamel-Moutalibi O.

• Laboratoire de Bio-surveillance de l’Environnement, Unite d’Hydrobiologie Littorale et Limnique, Faculte des Sciences, Universite de Carthage, Zarzouna, 7021 Bizerte, Tunisia

autor

Mnasri N.

• Laboratoire de Bio-surveillance de l’Environnement, Unite d’Hydrobiologie Littorale et Limnique, Faculte des Sciences, Universite de Carthage, Zarzouna, 7021 Bizerte, Tunisia

autor

Boumaiza M.

• Laboratoire de Bio-surveillance de l’Environnement, Unite d’Hydrobiologie Littorale et Limnique, Faculte des Sciences, Universite de Carthage, Zarzouna, 7021 Bizerte, Tunisia

autor

Reynaud C.

• Laboratoire d’Ichtyologie, Universite Montpellier II, Sciences et Techniques du Languedoc, Montpellier, France

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