Fundamental population–productivity relationships can be modified through density‐dependent feedbacks of life‐history evolution

Evolutionary Applications

Anna Kuparinen¹  Nils Christian Stenseth² 

[1] Department of Environmental Sciences, University of Helsinki, Helsinki, Finland;Centre For Ecological and Evolutionary Synthesis, Department of Biosciences, University of Oslo, Oslo, Norway

关键词: Atlantic cod;    fisheries‐induced evolution;    overfishing;    per capita population growth rate;    recovery;    recruitment;   

DOI  :  10.1111/eva.12217

来源: Wiley

【 摘 要 】

Abstract

The evolution of life histories over contemporary time scales will almost certainly affect population demography. One important pathway for such eco-evolutionary interactions is the density-dependent regulation of population dynamics. Here, we investigate how fisheries-induced evolution (FIE) might alter density-dependent population–productivity relationships. To this end, we simulate the eco-evolutionary dynamics of an Atlantic cod (Gadus morhua) population under fishing, followed by a period of recovery in the absence of fishing. FIE is associated with increases in juvenile production, the ratio of juveniles to mature population biomass, and the ratio of the mature population biomass relative to the total population biomass. In contrast, net reproductive rate (R₀) and per capita population growth rate (r) decline concomitantly with evolution. Our findings suggest that FIE can substantially modify the fundamental population–productivity relationships that underlie density-dependent population regulation and that form the primary population-dynamical basis for fisheries stock-assessment projections. From a conservation and fisheries-rebuilding perspective, we find that FIE reduces R₀ and r, the two fundamental correlates of population recovery ability and inversely extinction probability.

【 授权许可】

CC BY   
© 2014 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd.

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.