p. 313 - 344

EVALUATION DU STOCK DE SARDINELLE RONDE
(Sardinella aurita VALENCIENNES, 1874) 
SENEGALO-MAURITANIENNE


C. MAXIM et Cornelia Maxim 
Institut Roumain de Recherches Marines Constanta 

Abstract
The Senegalo-Mauritanian Round Sardinella stock represents
one of the main components of the catches obtained in 
Mauritania and Senegalese waters of the catches ranged,
between the last twenty years, between 80-200 ths. tons.
The basic parameters for the stock have been determined
from the data collected on board the Romanian trawlers
during 1972-1987. Length and age composition data indi-
cated great fluctuation of recruitment from year to year,
especially in the last ones. Growth parameters differ 
between authors despite of a relatively similar values
for the mean length at age. The total mortality for the
fully recruited age-groups ranged between 1.97-1.23 in 
the period 1981-1986. For a natural mortality of 0.55
the yield-per-recruit analysis indicates that the stock
has been exploited at a level beyond that giving the
maximum yield-per-recruit. Both the total and exploitable
biomass show a continous reduction from 1972 to 1987. The
catch projection indicates a slow and constant tendency
of improvement of abundance and biomass for the 1989 and
1990.