Delpiani G
Laboratorio de Biotaxonomía Morfológica y Molecular de Peces (BIMOPE), Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata, Funes 3350, Mar del Plata, Argentina.
J Fish Biol. 2016 Apr;88(4):1413-29. doi: 10.1111/jfb.12917. Epub 2016 Feb 28.
The total lengths (L(T)) of 193 males (209-556 mm) and 130 females (275-515 mm) of Amblyraja doellojuradoi, a commercial by-catch species on the Argentinean continental shelf, which are increasingly retained, were analysed. No sexual dimorphism was observed in the L(T) at which 50% of individuals were sexually mature; males matured at 448 mm and females at 411 mm, c. 80 and 82% of maximum L(T). The hepato-somatic index was similar among sexes, but significantly different between maturity stages, being lower in mature than immature specimens. Males had no seasonal difference in the hepato-somatic index and females had the lowest index in autumn. The gonado-somatic index was lower in males than in females and significantly higher in mature than immature specimens of both sexes. Males had the highest index in autumn and females had no seasonal difference. Collectively, these results would indicate that A. doellojuradoi breeds in autumn.
对阿根廷大陆架上一种商业兼捕物种——多氏钝吻鳐（Amblyraja doellojuradoi）的193条雄性个体（体长209 - 556毫米）和130条雌性个体（体长275 - 515毫米）的全长（L(T)）进行了分析，这种鱼被保留下来的数量越来越多。在50%的个体达到性成熟时的全长（L(T)）上未观察到两性异形；雄性在448毫米时成熟，雌性在411毫米时成熟，约为最大全长（L(T)）的80%和82%。肝体指数在两性之间相似，但在成熟阶段之间有显著差异，成熟个体的肝体指数低于未成熟个体。雄性的肝体指数没有季节性差异，雌性在秋季的肝体指数最低。性腺体指数雄性低于雌性，且在两性的成熟个体中均显著高于未成熟个体。雄性在秋季的性腺体指数最高，雌性没有季节性差异。总体而言，这些结果表明多氏钝吻鳐在秋季繁殖。
