Generación de Nuevo Conocimiento: Artículos publicados en revistas especializadas - Electrónicos
Biología reproductiva de la raya redonda de Venezuela Urotrygon venezuelae Schultz del Caribe colombiano
Fecha
2015-01-01Autor
Acevedo, Kelly
Moreno, Fabián
Grijalba-Bendeck, Marcela
Acero, Arturo
Paramo, Jorge
Institución
Resumen
As for most batoid species, little is known about the basic biology of the Venezuela
round stingray Urotrygon venezuelae (Urotrygonidae). This study presents information
about the reproductive biology of the species, including fecundity, embryonic
development stage, relationship between maternal size and fecundity, gonadosomatic
(GSI) and hepatosomatic (HSI) indices, sex ratios, maturity size and size at birth.
With all this information, a preliminary reproductive cycle is proposed. A total of 269
specimens were caught with beach seine in Salguero beach, Colombian Caribbean Sea,
between August 2005 and October 2006. We propose for U. venezuelae a biological
cycle with three reproductive peaks: November-December, March-April and August.
Size at sexual maturity was calculated in 176 mm (total length) for females and 227
mm for males; fecundity ranged between one and six embryos per female. We found
that cloacal diameter and liver weight were better predictors for fecundity than total
length for U. venezuelae.