Relationships between stomach contents and vertical migration in Meganyctiphanes norvegica, Thysanoëssa raschii and T. inermis (Crustacea Euphausiacea)
- 1 January 1980
- journal article
- Published by Oxford University Press (OUP) in Journal of Plankton Research
- Vol. 2 (2) , 129-143
- https://doi.org/10.1093/plankt/2.2.129
Abstract
Stomach contents of Thysanoëssa raschii, T. inermis and Meganyctiphanes norvegica collected in the Gulf of St. Lawrence showed the Thysanoëssa species fed primarily during the night in the upper 75 m of water. M. norvegica fed on copepods while at their daytime depth of about 125 m and on phytoplankton and copepods during the night above 75 m depth. M. norvegica fed on a wider range of organisms than the other two species during the three sample periods of spring, fall and early winter. There was no difference in the minimum size of the cells ingested between any of the species. No evidence was found of any of the species feeding on bottom deposits during the sample periods.Keywords
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