Artículos de revistas
Reproductive biology and seasonal distribution of Mustelus schmitti (Elasmobranchii : Triakidae) in the Rio de la Plata oceanic front, south-western Atlantic
Fecha
2005-10-01Registro en:
Journal of the Marine Biological Association of the United Kingdom. New York: Cambridge Univ Press, v. 85, n. 5, p. 1193-1198, 2005.
0025-3154
10.1017/S0025315405012294
WOS:000233037000022
WOS000233037000022.pdf
Autor
Dept Biol Pesquera
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The population structure and reproductive biology of Mustelus schmitti was analysed during autumn (1994, 1995) and spring (1994) in the Rio dc la Plata occanic front. The samples consisted mainly of a adult males and immature females, indicating that nursery areas are Situated elsewhere. In autumn, the highest female densities occurred between 36 degrees S and 35 degrees S, with densities decreasing further south, and high male densities occurred over all latitudes of the study area. In Spring, both Sexes occurred north of latitude 36 degrees 30 degrees S. Males attained Maturity at. 59 cm total length (TL), and females at 72 cmTL Litter size varied From one to ten in spring and two to nine in autumn, With embryos ranging from 9 to 26 cm and 7 to 26 cm TL respcctivcly the mean TL of embryos was significantly higher in spring (22 cm), suggesting that parturition Occurs ill late spring and summer. Litter size was found to Increase with female TL..