摘要：The fi shery activity constitutes one of the most important
economical resources of Argentina, with an annual catch
of around 850,000 t1. The fi shery management requires
knowledge about the reproductive biology of the species.
To estimate fi sh biomass, most assessment models use
information about reproductive parameters such as length
at maturity, fecundity or spawning frequency. Annual
changes of these variables could affect the stock fecundity
and produce variability in the recruitment of fi shes.
