These authors contributed equally to this work
The response of correlated traits following cessation of fishery-induced selection
Article first published online: 15 FEB 2012
© 2012 The Authors. Evolutionary Applications published by Blackwell Publishing Ltd.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Volume 5, Issue 7, pages 657–663, November 2012
How to Cite
Salinas, S., Perez, K. O., Duffy, T. A., Sabatino, S. J., Hice, L. A., Munch, S. B. and Conover, D. O. (2012), The response of correlated traits following cessation of fishery-induced selection. Evolutionary Applications, 5: 657–663. doi: 10.1111/j.1752-4571.2012.00243.x
- Issue published online: 30 OCT 2012
- Article first published online: 15 FEB 2012
- Received: 18 December 2011 Accepted: 21 December 2011
- experimental evolution;
- fisheries management;
- life history evolution;
- wildlife management
The application of evolutionary principles to the management of fisheries has gained considerable attention recently. Harvesting of fish may apply directional or disruptive selection to key life-history traits, and evidence for fishery-induced evolution is growing. The traits that are directly selected upon are often correlated (genetically or phenotypically) with a suite of interrelated physiological, behavioral, and morphological characters. A question that has received comparatively little attention is whether or not, after cessation of fishery-induced selection, these correlated traits revert back to previous states. Here, we empirically examine this question. In experiments with the Atlantic silverside, Menidia menidia, we applied size-selective culling for five generations and then maintained the lines a further five generations under random harvesting. We found that some traits do return to preharvesting levels (e.g., larval viability), some partially recover (e.g., egg volume, size-at-hatch), and others show no sign of change (e.g., food consumption rate, vertebral number). Such correlations among characters could, in theory, greatly accelerate or decelerate the recovery of fish populations. These results may explain why some fish stocks fail to recover after fishing pressure is relaxed.