Shags (Phalacrocorax aristotelisL.) as potential samplers of juvenile saithe (Pollachius virens(L.)) stocks in northern Norway

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Abstract
Accurate measurements of the recruitment levels into any fish stock are essential for the successful management of that stock. Pollachius virens is an important commercial species in Norway but accurate determinations of the fecundity rate of the stock are nearly unfeasible. This is due to the inshore habitat of the youngest year classes of the species where they evade capture in traditional sampling gear. This paper proposes annual analyses of Phalacrocorax aristotelis summer prey harvest as a supplement to data collected during traditional fisheries surveys.