Investigations on krill (Euphausiacea) sampled during the Norwegian Antarctic Research Expedition 1976–1977
- 31 May 1979
- journal article
- research article
- Published by Taylor & Francis in Sarsia
- Vol. 64 (3), 189-198
- https://doi.org/10.1080/00364827.1979.10411381
Abstract
Krill was sampled in the Weddell Sea, farther south than ever before, and off Bouvet-öya. Five species were found: Euphausia superba, E. crystallorophias, E. frigida, E. triacantha, and Thysanoessa macrura. E. superba and E. crystallorophias were the most abundant species north and south of 74° S respectively. Length frequency analyses suggest that E. superba from the inner Weddell Sea takes three years to reach maturity. This population differed in several aspects from the populations farther north. E. crystallorophias and T. macrura were registered south to 77°45′ S, the southernmost localisation investigated. The material gives no clear evidence whether these species take one or two years to reach maturity. Their spawning activity seems to start earlier in the season than for E. superba. E. frigida and E. triacantha were only-found off Bouvetöya. Continuous echosounder recordings revealed that the total abundance of krill in the southern parts of the Weddell Sea was low, as was also the abundance on the route between the South Orkney Islands and Dronning Maud Land.This publication has 2 references indexed in Scilit:
- On the biology of the Antarctic krillEuphausia superbaMarine Biology, 1970
- On the development and distribution of the young stages of Krill (Euphausia superba)Discovery reports, 1936