%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Cury, Philippe
%A Fromentin, J. M.
%A Figuet, S.
%A Bonhommeau, S.
%T Resolving Hjort's dilemma how is recruitment related to spawning stock biomass in marins fish ?
%D 2014
%L fdi:010063726
%G ENG
%J Oceanography
%@ 1042-8275
%M ISI:000348828000007
%N 4
%P 42-47
%R 10.5670/oceanog.2014.85
%U https://www.documentation.ird.fr/hor/fdi:010063726
%> https://www.documentation.ird.fr/intranet/publi/2015/03/010063726.pdf
%V 27
%W Horizon (IRD)
%X The relationship between spawning fish abundance and the number of offspring, the so-called stock-recruitment relationship, is crucial for fisheries management and conservation measures. Using the most comprehensive data set ever assembled, we quantify this relationship for 211 fish stocks worldwide, revealing a global pattern with a pervasive asymptotic shape that shows increasing recruitment reaching an upper limit for values around half to two-thirds of parental biomass. This corroborates previous theoretical and modeling results. However, parental biomass is a predictor for only 5% to 15% of the variance in recruitment, demonstrating the weak predictive power of the stock-recruitment relationship in marine fish populations. Thus, there is a need to move rapidly toward models that integrate environmental conditions and species interactions in fisheries stock assessment and management, as suggested by Johan Hjort 100 years ago.
%$ 040 ; 020