Ecological investigations on the zooplankton community of Balsfjorden, northern Norway: Seasonal changes in body weight and the main biochemical composition of thysanoessa inermis (krøyer), T. Raschii (M. Sars), and Meganyctiphanes norvegica (M. Sars) in relation to environmental factors

1981 ◽  
Vol 49 (2-3) ◽  
pp. 103-120 ◽  
Author(s):  
Stig Falk-Petersen
Keyword(s):  
Body Weight ◽  
Environmental Factors ◽  
Seasonal Changes ◽  
Biochemical Composition ◽  
Zooplankton Community ◽  
Northern Norway ◽  
Meganyctiphanes Norvegica

The Biochemical Composition of Euphausia Superba

1971 ◽  
Vol 51 (3) ◽  
pp. 581-588 ◽  
Author(s):  
J. E. G. Raymont ◽  
R. T. Srinivasagam ◽  
J. K. B. Raymont
Keyword(s):  
Body Weight ◽  
Biochemical Composition ◽  
Dry Weight ◽  
Euphausia Superba ◽  
Mean Value ◽  
Major Constituent ◽  
The Mean ◽  
Meganyctiphanes Norvegica ◽  
The Antarctic ◽  
Proximate Analyses

Proximate analyses of deep-frozen samples of Euphausia superba Dana obtained in December and January showed that protein was the major constituent, averaging just over 50% of the dry body weight. Lipid was much more variable; extreme limits of variation were from 6 to 33% dry weight, though the lipid content during January was distinctly higher than in December (means 27 and 13% dry weight respectively). This increase probably reflects a more intensive grazing by krill during the Antarctic summer. Increased lipid appears to be associated with some reduction in water content and in ash. Carbohydrate is low, the mean value for December being just under 5% dry body weight, but the content is slightly higher than that found for most zooplankton and may reflect the herbivorous habit of E. superba. The proximate biochemical composition of krill is similar to that of the boreal euphausiid, Meganyctiphanes norvegica.

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