A Case of Hermaphroditism in Tortonese's Stingray, Dasyatis Tortonesei (Elasmobranchii: Rajiformes: Dasyatidae) from the Lagoon of Bizerte, Tunisia
Authors: Capapé, Christian; Kamel-Moutalibi, Olfa El; Mnasri, Néjia; Boumaïza, Moncef; Reynaud, Christian
Source: Acta Ichthyologica Et Piscatoria, Volume 42, Number 2, June 2012 , pp. 141-149(9)
Publisher: Acta Ichthyologica et Piscatoria
Abstract: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.
Document Type: Research Article
Publication date: 2012-06-01
- ACTA ICHTHYOLOGICA ET PISCATORIA (AI&P) is an international, peer-review scientific journal that publishes articles based on original experimental data or experimental methods, or new analyses of already existing data, in any aspect of ichthyology and fisheries (fin-fish only).
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