Modelling the evolutionary effects of a coastal marine reserve on different ecological guilds of fish

Authored by Calvin Dytham, Tanja Miethe, Jonathan W Pitchford

Date Published: 2011

DOI: 10.1017/s0025315410001268

Sponsors: European Union

Platforms: C++

Model Documentation: Other Narrative Flow charts

Model Code URLs: Model code not found

Abstract

Marine reserves are used as a management tool to ensure sustainability of fish stocks. Using an individual-based model, we compare the evolutionary effect of a reserve located on a nursery ground, spawning ground, feeding ground, or in a year-round habitat for sedentary species. We model the evolution of life-history traits, specifically size at maturation and site fidelity. Within species, individuals will differ in the time spent within a reserve depending on their patterns of movement and migration. We predict that the evolutionary effect of fishing depends not only on the survival probability but also on the life-history stages primarily affected by high harvest mortality. Protection against evolution to small maturation size is most effective where a reserve protects a sedentary population or protects the feeding grounds of a population. We also find that protection of the feeding ground of an anadromous stock such as Atlantic salmon may lead to local adaptation enhanced by evolution of higher site fidelity, similar to protection of a sedentary species.

Tags

Individual-based model Cod gadus-morhua Atlantic cod Site fidelity Brook charr Fisheries-induced evolution Life-histories Plaice pleuronectes-platessa Protected areas Harvested fish