Resumen

MORENO RODRIGUEZ, FABIÁN; ACEVEDO URZOLA, KELLY  y  PARAMO, JORGE. Contribution To Biology Of Demersal Sharks And Rays In The North Region Of Colombian Caribbean. Acta biol.Colomb. [online]. 2008, vol.13, n.3, pp.121-130. ISSN 0120-548X.

The present study is a contribution to the biological knowledge of cartilaginous fish from the north of Colombian Caribbean. The samples were obtained from a demersal net in the north of Colombian Caribbean, its weight, overall length and sexual maturity stage was determined. Additionally, spatial distribution and its relationships with environmental variables were explored. A total of 21 individuals were captured, three ray species were collected, Dasyatis americana, D. guttata and Rhinobatos percellens, two sharks Mustelus minicanis and Rhizoprionodon porosus, the most common was D. guttata with 56%, the sizes (total length) fluctuated between 1760 - 394 mm in rays and 595 -585 mm in sharks. More females were obtained than males in all the species, with predominance of immature and in maturation states, a single pregnant female of M: minicanis with two embryos was registered.

Palabras clave : Caribbean; Colombia; Sharks; Rays; Biology.

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