Joint NAFO/ICES Pandalus Assessment Working Group



NIPAGNIPAGTrueMark Simpson, Fabian, fabian.zimmermann@hi.no76Joint NAFO/ICES Pandalus Assessment Working Group

The Joint NAFO/ICES Pandalus Assessment Working Group (NIPAG) draws together experts from around the world to provide scientific advice and management options for a number of important Pandalus shrimp stocks.

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​NIPAG conducts assessments based on survey and catch data using a variety of methods including Bayesian surplus production models and length–age structured models. Pandalus shrimp are protandric hermaphrodites, becoming mature females after spending 1–4 years as functional males, depending on location and conditions.  This interesting life-history attribute has been the subject of a number of studies and complicates the assessment of the stock and the management of the fishery.  In many of the ecosystems Pandalus shrimp are key forage species, and the consideration of predators such as cod brings an additional dimension to stock assessments.

NIPAG participants have a strong cross-section of skills, and members span from quantitative experts working on mathematical models to experts in the biology, life history and population dynamics of Pandulus shrimp.

​The work conducted by the group is centered on an annual meeting in September, which alternates in location between NAFO Headquarters in Halifax, Nova Scotia, and places such as Tromso, ICES Headquarters in Copenhagen, and Nuuk, Greenland among others.

NIPAG welcomes new participants to the WG who have an interest in the biology and assessment of Pandalus shrimp.

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