Abundance and spatial pattern of salps within the North Pacific Subarctic Frontal Zone, August 1991

Abstract

An intensive oceanographic and zooplankton survey of a small portion of the North Pacific Ocean=s Subarctic Frontal Zone (SAFZ) was conducted in August 1991.  Over 91% of the total displacement volume of the zooplankton samples consisted of salps, followed by copepods (2.1%), euphausiids (2.0%), chaetognaths (1.7%), and amphipods (1.0%).  Salps also accounted for almost half (44.7%) of the total caloric value in the samples.  Salp abundance was not correlated with abundances of the crustacean zooplankton groups. Salps exhibited a reverse diel vertical migration pattern; other species exhibited diel patterns.


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