Our aim is to develop a tool which industry can use to predict the behaviour of the Western Baltic Herring stock, under a range of management scenarios.
To do this, we want to establish a Long Term Management Plan (LTMP) for the species, through combining traditional knowledge with scientists’ understanding.


To read a quick one page summary of the case study, its aims and achievements please click here.


Our progress so far

In this case study, our aim is to propose a Long Term Management Plan for Herring (and related share quotas), through collaboration with stakeholders such as the Baltic Sea Regional Advisory Council (RAC) and the Pelagic RAC.

Our first step towards this goal, is to use modelling tools according to a framework agreed through a participatory process. We want to carry out initial trials of the modelling framework in November 2012, at which point we can revise and review the LTMP.

36 Month’s On: Progress review from the Danish case study

GAP2's Danish case study provides an update on progress made over the last twelve months

Mar 2015
24 Months On: Progress Update from Danish Case Study

24 Months On: Progress update on the Danish case study attempting to develop an LTMP for herring stocks...

Apr 2013
18 Months On: Progress Update for Danish Case Study

An update on the Danish case study exploring collaborative LTMPs for Herring, 18 months into the GAP2 project.

Nov 2012
Danish case study meets with Baltic RAC

In December 2011, we held a post-seminar meeting with Baltic RAC to discuss the details of the Long Term Management Plan (LTMP).

Dec 2011
Introductory Seminar for Denmark case study

The Denmark case study held an introductory seminar in November 2011 attended by, amongst others, the Pelagic RAC and the European Commission.

Nov 2011
Management Objectives to be Defined in November Meeting

The next step in 2011 will be to define the management objectives for herring in IIIa as a collaborative process with all stakeholders in a CS meeting in November 2011.

Oct 2011

Next Steps

  • A meeting between fishing industry representatives from Denmark, Sweden, Norway and Germany will be held to discuss the LTMP; this meeting will be held solely between fishermen and their organisations, but chaired by the lead scientist of the case study.
  • Following the meeting, modellers will adjust the fisheries management strategy evaluation (MSE) simulations according to the decisions made, and incorporate the most recent data.
  • With stakeholders, we will explore options for the provision of advice based upon the distribution of available herring for the fishery – and most importantly, how such advice can be made operational.
  • With stakeholders, we will explore how to develop the best sampling regime, given stock composition and reproduction.
  • An MSc student adhered to the case study will fine-tune the modelling of stock components to improve the statistical evaluation of the migration patterns of the herring.

People Involved

Lotte Worsøe Clausen

Occupation, Role

  • Special consultant, Section for Population Ecology and Genetics, National Institute of Aquatic Resources (DTU Aqua), Technical University of Denmark (since 2009).
  • Research assistant, Dept. of Marine Fisheries, DIFRES (2001-2008).
  • Project assistant, Dept. of Marine Fisheries, Danish Institute for Fisheries Research (DIFRES) (1999-2001).
  • Email:

Stakeholder Participants


Herring Case Study Overview

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