Dimorfismo sexual y relaciones morfométricas de Atlantoraja platana (Günther, 1880) en aguas del golfo San Matías, Patagonia

• Autores: Nidia Coller, María Perier, Edgardo di Giácomo
• Localización: Revista del Museo Argentino de Ciencias Naturales, ISSN-e 1853-0400, ISSN 1514-5158, Vol. 13, Nº. 1, 2011, págs. 1-5
• Idioma: español
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• Resumen

  • Sexual dimorphism and morphometric relationships of Atlantoraja platana (Günther, 1880)in San Matías gulf waters, Patagonia.The skate Atlantoraja platana, commonly known in Argentina as “rayaplatana”, is endemic to the Southwest Atlantic. It is distributed from Brasil (24°S) to north Patagonian waters(42°11’S). In this study the morphometric aspects of this skate were described. In the San Matías gulf (41°-42°Sy 64°-65°W), a total of 778 females and 709 males were sampled from different sources between 2004 and 2006.The total length ranged was 19 to 89 cm for females and 19 to 79 cm for males. Atlantoraja platana was sexuallydimorphic in total length-weight and total length-disc width relationships. Since 41 cm onwards the females arebeing heavier than males. The total length-weight relationship was Pt= 0.0132 x Lt2.91 for females and Pt= 0.0222x Lt2.77 for males. The total length-disc width relationship was DW= 7.27 + 0.762Lt for females and DW= 7.768+ 0.798Lt for males. This is the first report of morphometric relationships of this species in the Argentinean Seaand they should be used for comparison purpose between different latitudinal localizations of this skate.