INVESTIGADORES
LUCIFORA Luis Omar
congresos y reuniones científicas
Título:
Reproductive ecology of the Rio skate, Rioraja agassizi, from northern Argentina
Autor/es:
ANA M. MASSA; EZEQUIEL MABRAGAÑA; LUIS O. LUCIFORA
Lugar:
San Andrés Isla
Reunión:
Congreso; IX Congreso Latinoamericano de Ciencias del Mar; 2001
Resumen:
Size at maturity, sexual dimorphism, sex and immature-mature ratios, and population densities
of the Rio skate, Rioraja agassizi, from north Argentina are described in this work. Males matured at 420-
520 mm TL (total length), and females at 526-545 mm TL. Sexual dimorphism in size at maturity and in
liver size (larger in females) was observed. The sexes were equally represented. In contrast, the immature-
mature ratio varied seasonally (higher in early spring than in late spring-summer). Densities were higher
in late spring and summer than in early winter-spring. Fluctuations in immature-mature ratio and in
densities suggest that adults come to nearshore waters for reproductive activities in summer.
