Research Document - 2006/097
Vertical distribution of the midwater trawl catches of Atlantic mackerel (Scomber scombrus L.) in relation with water temperature
By Grégoire, F
Abstract
The edge of the Scotian Shelf is characterized by a layer of deep water whose winter and spring temperatures are higher than those on the surface. Inside this layer, which extends from Georges Bank to Sable Island, water temperature can be above 8 °C. In light of the Atlantic mackerel’s (Scomber scombrus L.) thermal preference, this layer of water could represent an appropriate wintering area for this species. Mackerel catches made chiefly in this layer of water using midwater trawls by foreign vessels between 1990 and 1992 appear to confirm this hypothesis.
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