Research Document - 2006/098

Distribution and abundance of the Atlantic mackerel (Scomber scombrus L.) eggs and larvae from the ichthyoplankton surveys conducted in the southern Gulf of St. Lawrence between 1965 to 1975

By F. Grégoire and C. Lafleur

Abstract

In the Gulf of St. Lawrence, the first large scale ichthyoplankton surveys were conducted by Kohler between 1965 and 1975. During this period, a total of 35 surveys were made from May to October at a rate of 2-5 surveys per year. Atlantic mackerel eggs and larvae were collected on most of these surveys. A large number of sampling gears were used but standard nets deployed on the surface and at 15 m yielded eggs at a significant number of stations. Eggs were not only collected as early as May, but also quite late in the season, i.e. in September and October. In May, most of the eggs were found around the Magdalen Islands and in June, between New Brunswick and the Magdalen Islands. The most significant abundances of eggs were recorded in June.

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