Evolutionary response to size-selective mortality in an exploited fish population

Evolutionary response to size-selective mortality in an exploited fish population.

Many collapsed fish populations have failed to recover after a decade or more with little fishing. This may reflect evolutionary change in response to the highly selective mortality imposed by fisheries. Recent experimental work has demonstrated a rapid genetic change in growth rate in response to size-selective harvesting of laboratory fish populations. Here, we use a 30-year time-series of ba...

Stabilization of an Exploited Fish Population

Abstract. The purpose of the paper is to design a fishing strategy in order to regulate an exploited fish population. To this end, we use a stagestructured model of a harvested fish population that has been derived in [5]. We give a formula for the fishing effort as a feedback control that allows to stabilize the system. travail réalisé avec la contribution financière du CNCPRST (Maroc) et du C...

Evolutionary regime shifts in age and size at maturation of exploited fish stocks.

Worldwide declines of fish stocks raise concerns about deleterious consequences of harvesting for stock abundances and individual life histories, and call for appropriate recovery strategies. Fishes in exploited stocks mature earlier at either larger or smaller sizes due to both genetic and plastic responses. The latter occur commonly when reduced competition for food leads to faster growth. Us...

Are exploited fish populations stable?

An Expanded Multispecies Virtual Population Analysis Approach (MSVPA- X) to Evaluate Predator-Prey Interactions in Exploited Fish Ecosystems