Reproductive biology and abundance of the freckled sandskate Psammobatis lentiginosa McEachran, 1983 in the southwest Atlantic.

MABRAGAÑA, E.; IBAÑEZ, P.; COUSSEAU, M. B.

MARINE BIOLOGY RESEARCH

TAYLOR & FRANCIS AS

Año: 2012 vol. 8 p. 292 - 299

1745-1000

The reproductive biology and abundance of the freckled sandskate Psammobatis lentiginosa in the southwest Atlantic was investigated. Specimens of P. lentiginosa were captured from 358 15?S to 458 19?S with a gap between 398 20? and 448 22?S, from 49 to 164 m depth, which was consistent with most previous studies. Major concentrations of P. lentiginosa were detected between 358 and 378S, and between 90 and 130 m depth. Females matured at larger sizes than males; L50 (estimated size at which 50% of individuals are sexually mature) was 313 mm TL (total length) and 333 mm TL for males and females, respectively. Oviposition in P. lentiginosa occurs in winter and spring in northern areas, and in summer in the southern area. Given their relatively small size, Psammobatis spp. may be less susceptible to population depletion than other skates. Nonetheless, factors such as increasing fisheries pressure and habitat disturbance due to trawling may be impacting on those species in the study area.