Journal article
Integrating the scale of population processes into fisheries management, as illustrated in the sandeel, Ammodytes marinus
Marine Scotland Science1
Section for Marine Living Resources, National Institute of Aquatic Resources, Technical University of Denmark2
National Institute of Aquatic Resources, Technical University of Denmark3
Section for Ecosystem based Marine Management, National Institute of Aquatic Resources, Technical University of Denmark4
Aggregations of site-attached populations can show marked differences in density due to variation in local productivity and mortality processes. Matching management actions to the scale of biological processes is therefore important for sustainable fisheries management. This study examined the adequacy and appropriate scale of a spatially explicit management regime for sandeel, Ammodytes marinus, in the North Sea.
Information from biophysical model simulations of larval transport and otolith chemistry was used to estimate the scale of mixing among aggregations. Together, these approaches indicated that there was negligible exchange of pre-settled sandeel among aggregations >200 km apart. Additionally, a re-analysis of tag-recapture experiments and distribution data indicated that the dispersive range decreased further after settlement.
Significant differences in length at maturity and year-class strength not only reflect the limited mixing across the North Sea, but also point to regional differences in productivity and thereby vulnerability to fishing pressure. We conclude that the current management regime comprised of multiple assessment areas enable these differences to be considered in advice on annual fishing quotas
Language: | English |
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Publisher: | Oxford University Press |
Year: | 2019 |
Pages: | 1453-1463 |
ISSN: | 10959289 and 10543139 |
Types: | Journal article |
DOI: | 10.1093/icesjms/fsz013 |
ORCIDs: | Christensen, Asbjørn , Rindorf, Anna and van Deurs, Mikael |
Ammodytes Biophysical model Maturity Otolith chemistry Population structure SDG 14 - Life Below Water Tagging
biophysical model maturity otolith chemistry population structure tagging