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Research Document 1997/12

Overview of 1996 Hydrographic Sampling Effort and Near-Bottom Water Temperature and Salinity Conditions During the Canadian Spring Research Vessel Groundfish Surveys Conducted on the eastern Scotian Shelf (4VsW) and Georges Bank (5Z)

By F. Page and R. Loiser

Abstract

Hydrographic sampling effort and near-bottom water temperatures and salinities from the 1987-96 Canadian research vessel spring groundfish, stratified random, bottom-trawl surveys are summarised. The surveys cover NAFO divisions 4VsW and 5Z. The timing of the surveys continues to be variable between years. Therefore, caution must be exercised in interpreting the hydrographic trends as climatic variability in the hydrography. In 1996, the surveys were conducted early, relative to previous years in the series. No samples were taken in 4VsW strata 411. The temperatures and salinities sampled in 1996 were near or above those observed in previous surveys.

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