Cury Philippe, Fromentin J. M., Figuet S., Bonhommeau S. (2014). Resolving Hjort's dilemma how is recruitment related to spawning stock biomass in marins fish ?. Oceanography, 27 (4), 42-47. ISSN 1042-8275.
Titre du document
Resolving Hjort's dilemma how is recruitment related to spawning stock biomass in marins fish ?
Cury Philippe, Fromentin J. M., Figuet S., Bonhommeau S.
Source
Oceanography, 2014,
27 (4), 42-47 ISSN 1042-8275
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.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Ressources halieutiques [040]
