Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica ...

The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL)...

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Bibliographic Details
Main Authors: Meyer, Bettina, Fuentes, Veronica, Guerra, Citlali, Schmidt, Katrin, Atkinson, Angus, Spahic, Susanne, Cisewski, Boris, Freier, Ulrich, Olariaga, Alejandro, Bathmann, Ulrich
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2009
Subjects:
Bongo net
Hand net
Sampling by diver
ANT-XXI/4
ANT-XXIII/6
Polarstern
Biological Oceanography @ AWI AWI_BioOce
Antarctic
Atkinson
Austral
Lazarev
Lazarev Sea
Antarc*
Antarctic Krill
Antarctica
Euphausia superba
Online Access:https://dx.doi.org/10.1594/pangaea.707193
https://doi.pangaea.de/10.1594/PANGAEA.707193
Description
Summary:The physiological condition of larval Antarctic krill was investigated during austral autumn 2004 and winter 2006 in the Lazarev Sea, to provide better understanding of a critical period of their life cycle. The condition of larvae was quantified in both seasons by determining their body length (BL), dry mass (DM), elemental- and biochemical composition, as well as stomach content analysis, and rates of metabolism and growth. Overall the larvae in autumn were in better condition under the ice than in open water, and for those under the ice there was a decrease in condition from autumn to winter. Thus growth rates of furcilia larvae in open water in autumn were similar to winter values under the ice (mean 0.008 mm/d), whereas autumn, under ice values were higher: 0.015 mm/d. Equivalent larval stages had up to 30% lower BL and 70% lower DM in winter compared to autumn, with mean oxygen consumption 44% lower (0.54 µl O2 DM/h). However, their ammonium excretion rates doubled (from 0.03-0.06 µg NH4 DM/h) so their ... : Supplement to: Meyer, Bettina; Fuentes, Veronica; Guerra, Citlali; Schmidt, Katrin; Atkinson, Angus; Spahic, Susanne; Cisewski, Boris; Freier, Ulrich; Olariaga, Alejandro; Bathmann, Ulrich (2009): Physiology, growth and development of larval krill ''Euphausia superba'' in autumn and winter in the Lazarev Sea, Antarctica. Limnology and Oceanography, 54(5) ...

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