Twenty-five MOCNESS (Multiple Open/Closing Net and Environmental Sensing System) tows were taken in and around a large swarm of Euphausia superba near Elephant Island. Krill from all 25 tows (201 samples) and the copepods from 9 tows (63 samples) have been analyzed. Significant agreement in rank order of abundance is found for both krill and nonkrill fractions. Most copepod species show significant covariation; there is less significant covariation among euphausiid categories. Larvae of E. superba and Thysanoessa spp. cooccur and show strong positive covariation. There are large day-night differences in catches of both adult and, to a lesser degree, larval euphausiids. Vertical boundaries between larval and adult E. superba are often sharp, and larvae may occur either above or below significant adult concentrations.
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Shulenberger et al. (1984) studied this question.
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