Most herring populations are migratory and often congregate on feeding and wintering grounds where aggregations may consist of mixtures of individuals from several populations, thus the standard concept of ‘a herring stock’ within a geographical area such as a management unit is not straight-forward to assume. The analysis of the genetic composition is becoming a widely and cost-effective tool for stock identification for separating herring into populations or stocks.
Recent advances include Next Generation Sequencing (NGS) and Genotyping by Sequencing (GBS) based approaches have recently been developed and applied to e.g., herring (Clupea harengus), cod (Gadus morhua), boarfish (Capros aper) and horse mackerel (Trachurus trachurus) for marker development and screening of spawning samples.
Given these developments, it is now timely to revisit this herring stock identification method after the conclusions of WKSIDAC in 2017 (ICES, 2017).
The objectives of this workshop are:
Key stocks to focus on:
In addition, the following stocks may be considered: