Año 1994, Número 9 – 11-24

Año 1994, Número 9 – 11-24

Hansen, J.E. 1994.  Diferencias entre parámetros vitales de las poblaciones bonaerense y patagónica de anchoíta argentina.
Rev. Invest. Desarr. Pesq., 9: 11-24.
Ver texto completo

Two pelagic cruises were carried out by R/V “Cap.Oca Balda” in the spring of 1988 and the following summer. Anchovy samples were taken in order to increase the knowledge on the differences between two main stocks of the species, inhabiting the Argentine Sea from 35°S southwards, with distributional boundary situated at about 41°S. Length-weight relationships were statistically different among populations. Weight-at-length values calculated for the summer cruise were higher than spring estimates, and they were also higher within Northern individuals. The differences were not statistically significant between stocks, but there are reasons to believe that if ages 1 and 6 of both stocks had been represented those differences would have been increased. Mortality rates could not be accurately estimated.