Title: Population declines of tuna and relatives depend on their speed of life
Authors: JUAN-JORDÁ Maria JoséMOSQUEIRA SANCHEZ IAGOFREIRE JuanDULVY Nicholas
Citation: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES vol. 282 no. 1811 p. 20150322
Publisher: ROYAL SOC
Publication Year: 2015
JRC N°: JRC94865
ISSN: 0962-8452
URI: http://rspb.royalsocietypublishing.org/content/282/1811/20150322
http://publications.jrc.ec.europa.eu/repository/handle/JRC94865
DOI: 10.1098/rspb.2015.0322
Type: Articles in periodicals and books
Abstract: Larger-bodied species tend to decline more steeply and are at greater risk of extinction. Yet, the diversity in life histories is governed not only by body size, but also by time related traits. A key question is whether this size-dependency of vulnerability also holds, not just locally, but globally across a wider range of environments. We test the relative importance of size- and time-related life history traits and fishing mortality in determining population declines and current exploitation status in tunas and their relatives. We use uniquely high quality datasets of half a century of population trajectories combined with population-level fishing mortalities and life history traits. Time-related traits (e.g. growth rate), rather than size-related traits (e.g. maximum size), better explain the extent and rate of declines and current exploitation status across tuna assemblages, after controlling for fishing mortality. Consequently, there is strong geographic patterning in population declines, such that populations with slower life histories (found at higher cooler latitudes) have declined most and more steeply and have a higher probability of being overfished than populations with faster life histories (found at tropical latitudes). Hence the strong, temperature-driven, latitudinal gradients in life history traits may underlie the global patterning of population declines, fisheries collapses, and local extinctions.
JRC Directorate:Space, Security and Migration

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.