Contrasting the reproductive potential of Narcine entemedor and Rhinoptera steindachneri: 2 viviparous batoid species with different reproductive strategies

Narcine entemedor and Rhinoptera steindachneri are 2 viviparous batoid species of commercial importance on the Pacific coast Mexico. However, no adequate management plan has been set forth for either them to ensure sustainable use. The aims this study were assess reproductive potential rate population increase (rʹ) both species, as well contrasting their strategies, infer how susceptible they fishing exploitation. Comparatively, among batoids, N. females have an early age at maturity, relatively high fecundity, intermediate lifespan, while R. low a short lifespan. According our estimates, however, potential, which exhibits by investing energy in maximizing fecundity increasing embryo’s body mass. Therefore, better capacity recover from overfishing (rʹ = 0.48) comparison with –0.18). methodology used proved be good option risk there is limited data.