The impact of fishing-induced mortality on the evolution of alternative life-history tactics in brook charr

Theriault V, Dunlop ES, Dieckmann U, Bernatchez L, & Dodson JJ (2008). The impact of fishing-induced mortality on the evolution of alternative life-history tactics in brook charr. Evolutionary Applications 1 (2): 409-423. DOI:10.1111/j.1752-4571.2008.00022.x.

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Abstract

Although contemporary trends indicative of evolutionary change have been detected in the life-history traits of exploited populations, it is not known to what extent fishing influences the evolution of alternative life-history tactics in migratory species such as salmonids. Here, we build a model to predict the evolution of anadromy and residency in an exploited population of brook charr, "Salvelinus fontinalis". Our model allows for both phenotypic plasticity and genetic change in the age and size at migration by including migration reaction norms. Using this migration reaction norm, resulting in a decrease in average probabilities of migration with increasing harvest rate. Moreover, we show that differences in natural mortalities in freshwater greatly influence the magnitude and rate of evolutionary change. The fishing-induced changes in migration predicted by our model alter population abundances and reproductive output and should be accounted for in the sustainable management of salmonids.

Item Type: Article
Uncontrolled Keywords: Alternative tactics; Eco-genetic model; Evolution; Fisheries-induced adaptive change; Harvest; Migration; Reaction norm; Recreational fishing
Research Programs: Evolution and Ecology (EEP)
Bibliographic Reference: Evolutionary Applications; 1(2):409-423 (May 2008) (Published onlline 28 April 2008)
Depositing User: IIASA Import
Date Deposited: 15 Jan 2016 08:41
Last Modified: 07 Sep 2016 07:54
URI: http://pure.iiasa.ac.at/8575

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