Resumen del producto

The sharpnose shark Rhizoprionodon longurio is a species of commercial importance representing 0.02%, in the total catches of elasmobranchs. There is a lack of information about biology of the species, the reproductive aspects of the species for the geographical area of the Gulf of California are unknown. The present study aims to characterize the reproductive biology of the sharpnose shark. The specimens were collected in Santa Rosalía B.C.S during 2018-2019. A total of 142 females and 54 males were analyzed, the sizes ranged between 62 and 127 cm of the total length (TL), significant differences were found between male and female sizes. A sexual ratio of 2.29H: 1M. The morphological description of the reproductive organs was carried out, defining two stages of maturity for males and three for females. Litter size average of 7.42 pups per female with an embryonic proportion of 0.93H: 1M. Length at maturity was 92.99 cm of TL for females and 99.62 cm of TL for males was calculated using a binomial logistic model. Length at maternity of 104.64 cm of LT was estimated for the first time for this species. This information is essential for the design fishing management of species.

Palabras clave: artisanal fishing; morphometry; litter size; length at maturity; length at maternity; fishing management

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