No-take marine reserves can enhance population persistence and support the fishery of abalone

摘要: A critical aspect in the design of a marine reserve (MR) network is its spatial configuration (i.e., number, size, and spacing individual reserves), particularly how these features influence effect on fisheries. Here, we derived size- based, spatially explicit, stochastic demographic model to explore different configurations MR networks can affect abundance commercial yield green abalone (Haliotis fulgens), taking as reference case fishery Isla Natividad Baja California Sur (Mexico). Our analysis suggests that MRs have positive population slightly negative output with respect traditional maximum sustainable (MSY; i.e., no reserves). Simulations show catches achievable are, under best configura- tion, 2%-14% lower than MSY depending total fraction fishing grounds protected. In overexploitation, long-term yields increase following implementation MRs. addition, presence MRs, abundances are much less sensitive systematic errors enforcement optimal harvesting rate compared situations which not present. Given limited dispersal ability species, outcomes terms would be achieved very small reserves — around 100 m wide so maximize larval export fishable areas. results indicate appropriately designed an effective strategy for meeting both conservation economic goals uncertainty. While size existing seems adequate protect stock, smaller could benefits, although this poses challenges enforcement. Resume : Un cle de la conception d'un reseau marines (RM) est sa spatiale, soit le nombre, taille et l'espacement des differentes reserves, en particulier l'influence ces caracteristiques sur l'incidence du les peches. Nous avons mis au point un modele demographique stochastique spatialement explicite base pour