The Gordian knot: managing herring (Clupea harengus) bridging across populations, fishery units, management areas, and politics

Publication: ResearchConference abstract in proceedings – Annual report year: 2012

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The Gordian knot: managing herring (Clupea harengus) bridging across populations, fishery units, management areas, and politics. / Worsøe Clausen, Lotte; Mosegaard, Henrik; Berg, Casper Willestofte; Ulrich, Clara.

ICES CM. Vol. N:06 Copenhagen : International Council for the Exploration of the Sea (ICES), 2012.

Publication: ResearchConference abstract in proceedings – Annual report year: 2012

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Worsøe Clausen, Lotte; Mosegaard, Henrik; Berg, Casper Willestofte; Ulrich, Clara / The Gordian knot: managing herring (Clupea harengus) bridging across populations, fishery units, management areas, and politics.

ICES CM. Vol. N:06 Copenhagen : International Council for the Exploration of the Sea (ICES), 2012.

Publication: ResearchConference abstract in proceedings – Annual report year: 2012

Bibtex

@inbook{443adab8434d4468b61d1c8cbc374951,
title = "The Gordian knot: managing herring (Clupea harengus) bridging across populations, fishery units, management areas, and politics",
publisher = "International Council for the Exploration of the Sea (ICES)",
author = "{Worsøe Clausen}, Lotte and Henrik Mosegaard and Berg, {Casper Willestofte} and Clara Ulrich",
year = "2012",
volume = "N:06",
booktitle = "ICES CM",

}

RIS

TY - ABST

T1 - The Gordian knot: managing herring (Clupea harengus) bridging across populations, fishery units, management areas, and politics

A1 - Worsøe Clausen,Lotte

A1 - Mosegaard,Henrik

A1 - Berg,Casper Willestofte

A1 - Ulrich,Clara

AU - Worsøe Clausen,Lotte

AU - Mosegaard,Henrik

AU - Berg,Casper Willestofte

AU - Ulrich,Clara

PB - International Council for the Exploration of the Sea (ICES)

CY - Copenhagen

PY - 2012

Y1 - 2012

N2 - The management of western Baltic spring spawning (WBSS) herring is challenged by the highly complex stock structure with a temporal and geographical distribution leading to conflicting interests among different stakeholder groups. The stock is exploited in the Baltic Sea (Subdivisions 22–24) and the North Sea (Division IIIa) by various EU—and in the latter case also non‐EU—fishing <br/>fleets. For the two separate management areas, TACs are set at different times in the yearly TACsetting process by the EU and negotiating counties, which often result in conflicts over quota allocations among different management units. The WBSS herring stock spawns in the western Baltic Sea and migrates into the Kattegat and Skagerrak areas, where it mixes with North Sea autumn spawning (NSAS) herring. Recent development of otolith shape analysis has enabled a <br/>high‐resolution separation of herring stocks in these waters, giving a more detailed picture of the actual stock mixing potentially undermining the current assumption of only three population components. We discuss how a higher resolution of spawning components may facilitate the estimation of local population‐related productivity, and how this in turn may be applied in an <br/>advanced future management of several populations within one management unit

AB - The management of western Baltic spring spawning (WBSS) herring is challenged by the highly complex stock structure with a temporal and geographical distribution leading to conflicting interests among different stakeholder groups. The stock is exploited in the Baltic Sea (Subdivisions 22–24) and the North Sea (Division IIIa) by various EU—and in the latter case also non‐EU—fishing <br/>fleets. For the two separate management areas, TACs are set at different times in the yearly TACsetting process by the EU and negotiating counties, which often result in conflicts over quota allocations among different management units. The WBSS herring stock spawns in the western Baltic Sea and migrates into the Kattegat and Skagerrak areas, where it mixes with North Sea autumn spawning (NSAS) herring. Recent development of otolith shape analysis has enabled a <br/>high‐resolution separation of herring stocks in these waters, giving a more detailed picture of the actual stock mixing potentially undermining the current assumption of only three population components. We discuss how a higher resolution of spawning components may facilitate the estimation of local population‐related productivity, and how this in turn may be applied in an <br/>advanced future management of several populations within one management unit

VL - N:06

BT - ICES CM

T2 - ICES CM

ER -