Resolving Hjort's Dilemma How Is Recruitment Related to Spawning Stock Biomass in Marins Fish?
|Author(s)||Cury Philippe M.1, 2, Fromentin Jean-Marc2, 3, Figuet Sarah1, 2, Bonhommeau Sylvain2, 3|
|Affiliation(s)||1 : Institut de Recherche pour le Développement, Sète, France
2 : Centre de Recherche Halieutique Méditerranéenne et Tropicale, Sète, France
3 : Institut français de recherche pour l'exploitation de la mer (IFREMER), Sète, France
|Source||Oceanography (1042-8275) (The Oceanography Society), 2014-12 , Vol. 27 , N. 4 , P. 42-47|
|WOS© Times Cited||20|
|Abstract||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.|