Ecology of haddock (Melanogrammus aeglefinus L.) in the Norwegian Deep

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Abstract
The distribution, population structure, and diet of haddock ( Melanogrammus aeglefinus L.) in the Norwegian Deep are related to seasonal and ontogenetic variations. There was a seasonal migration between relatively shallow areas in summer and deeper parts in winter. The distribution became gradually more shallow with increasing age: mature specimens were probably migrating out of the area in winter. Polychaetes, crustaceans, and ophiuroids dominated the diet, but teleosts were of less importance. The seasonal variation of diet composition dominated over ontogenetic variation. Polychaetes and bivalves were important in winter, whereas euphausiids, decapods, ophiuroids, and teleosts dominated in summer.

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