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KARYOLOGICAL STUDY OF THE MEDITERRANEAN KRILL MEGANYCTIPHANES NOR VEGICA (EUPHAUSIACEA)

KARYOLOGICAL STUDY OF THE MEDITERRANEAN KRILL MEGANYCTIPHANES NOR VEGICA (EUPHAUSIACEA) and Euphausiids constitute an important component of the oceanic pelagic biomass. Known as krill, they aggregate in swarms of variable size which provide large concen- trations of food for marine invertebrates and vertebrates such as squids, fishes, birds, and whales. The 86 species of Euphausiacea (Ba- ker et al., 1990) share common traits in morphology and behavior, and are distrib- uted world-wide. In the Northern hemisphere, Meganyc- tiphanes norvegica (M. Sars) is distributed from the east coast of Canada to northern and western Europe, and the Mediterranean Sea (Mauchline and Fisher, 1969). Such a wide distribution suggests separate breeding populations. Northern Europe and Medi- terranean populations have developed dif- ferent adaptive strategies concerning repro- duction (Cuzin-Roudy, 1993) and enzyme kinetics (Buchholz and Vetter, 1993). Knowledge of the genetic structure of krill populations may help to answer the ques- tion whether there are geographically iso- lated, genetically different stocks. Up to now, investigation on the genetics of M. norv- egica refers only to a study of enzyme poly- morphism in a Northern Atlantic popula- tion (Fevolden, 1982). Electrophoretic studies of other krill species indicated high genetic variation (Bucklin and Wiebe, 1986) except for one species, Euphausia superba Dana, exhibiting http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Crustacean Biology Brill

KARYOLOGICAL STUDY OF THE MEDITERRANEAN KRILL MEGANYCTIPHANES NOR VEGICA (EUPHAUSIACEA)

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Publisher
Brill
Copyright
Copyright 1995 by Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0278-0372
eISSN
1937-240X
DOI
10.1163/193724095X00604
Publisher site
See Article on Publisher Site

Abstract

and Euphausiids constitute an important component of the oceanic pelagic biomass. Known as krill, they aggregate in swarms of variable size which provide large concen- trations of food for marine invertebrates and vertebrates such as squids, fishes, birds, and whales. The 86 species of Euphausiacea (Ba- ker et al., 1990) share common traits in morphology and behavior, and are distrib- uted world-wide. In the Northern hemisphere, Meganyc- tiphanes norvegica (M. Sars) is distributed from the east coast of Canada to northern and western Europe, and the Mediterranean Sea (Mauchline and Fisher, 1969). Such a wide distribution suggests separate breeding populations. Northern Europe and Medi- terranean populations have developed dif- ferent adaptive strategies concerning repro- duction (Cuzin-Roudy, 1993) and enzyme kinetics (Buchholz and Vetter, 1993). Knowledge of the genetic structure of krill populations may help to answer the ques- tion whether there are geographically iso- lated, genetically different stocks. Up to now, investigation on the genetics of M. norv- egica refers only to a study of enzyme poly- morphism in a Northern Atlantic popula- tion (Fevolden, 1982). Electrophoretic studies of other krill species indicated high genetic variation (Bucklin and Wiebe, 1986) except for one species, Euphausia superba Dana, exhibiting

Journal

Journal of Crustacean Biology – Brill

Published: Jan 1, 1995

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