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 Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.


Reproductive Biology of the Pelagic Stingray Pteroplatytrygon violacea (Bonaparte 1832), in the Equatorial and Southwestern Atlantic Ocean

Drausio Veras, Fabio Hazin, Ilka Branco, Mariana Tolotti, George Burgess

Abstract

From October 2005 to March 2010, a total of 480 pelagic stingray, Pteroplatytrygon violacea, specimens, 188 females and 292 males (0.64 female:1 male), were taken in the Equatorial and Southwestern Atlantic by the commercial tuna longline fishery and their reproductive biology was studied. Disc widths (DW) ranged from 28.0 to 66.0 cm for females and from 34.0 to 59.6 cm for males. Size at first sexual maturity was estimated at ca. 48.0 cm DW (first pregnant female) for females and ca. 41.0 cm DW for males. Ovarian fecundity, considering only follicles larger than >0.5cm in diameter, ranged from 1 to 17 follicles/female, while the uterine fecundity of embryos in pregnant females in stages 2 and 3 ranged from 1 to 5 embryos/female. The sex ratio between the embryos was almost equal (1.08 female:1 male) and the size at birth was 19.0 cm DW.

MF13008  Accepted 10 April 2014
 
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