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AMMONIA EXCRETION IN THE ANTARCTIC KRILL EUPHAUSIA SUPERBA IN RELATION TO STARVATION AND ONTOGENETIC STAGES

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ABSTRACT The rate of ammonia excretion in different stages of fed and starved krill, Euphausia superba, from Bransfield Strait was determined at 1.8°C. Brief starvation induced a significant impact in depressing ammonia excretion in all stages of krill. Ammonia excretion rate in freshly captured krill is exceedingly high with peak levels reaching as much as 260 μg NH,/g dry wt/h. This study also evaluates the krill excretion rate in relation to other planktonic species from temperate, tropical, and polar seas. This finding of high rate of catabolic activity in krill is in agreement with recent discovery of the unusually high feeding rate of krill.

Affiliations: 1: Institute for Marine Biomedical Research, University of North Carolina at Wilmington, Wilmington, North Carolina 28403.

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/content/journals/10.1163/1937240x84x00642
1984-01-01
2016-12-09

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