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Growth rates of Euphausia superba at station PS69/478-3

Authors
Publisher
PANGAEA
Publication Date
Identifiers
DOI: 10.1594/pangaea.683853
Keywords
  • Ant-Xxiii/6
  • Awi_Biooce
  • Biological Oceanography @ Awi
  • Determined From Uropode Length
  • Euphausia Superba
  • Larvae
  • Growth Rate
  • Hand Net
  • Polarstern
  • Ps69
  • Ps69/478-3
Disciplines
  • Biology
  • Ecology

Abstract

Marine Ecology Progress Series 257:167 MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser Vol. 257: 167–177, 2003 Published August 7 INTRODUCTION Planktonic larvae are a critical life-cycle phase of many marine species, and their survival and growth influence population success (e.g. Daly 1990, Ross & Quetin 1991). Turnover rates and recruitment success of euphausiids are of particular interest because of their important role in the ecosystems they occupy, many of which are sites for commercial fisheries. Mor- tality rates of euphausiid larvae can be over 90% mo–1 (Siegel 2000a,b), and these rates are highly variable. However, we have only cursory information on the ecology of euphausiid larvae, even for the best-known species, Antarctic krill. The Antarctic krill Euphausia superba (hereafter ‘krill’) is the primary prey for many predators in Antarctic waters. It has key status in the Southern Ocean and occupies a central place in commercially valuable food webs. Most of the information on krill is for adults during the Antarctic summer, with little yet known of its larval ecology. Most studies on krill larvae address their regional distribution patterns (e.g. Fraser 1936, Hempel 1985, Frazer et al. 1997, Siegel 2000b) and ecophysiological field studies are scarce (Ikeda 1981, Brinton & Townsend 1984, Daly 1990, Huntley & Brinton 1991, Frazer et al. 2002, Meyer et al. 2002). Euphausiids develop through a series of larval stages with different critical phases. Larval krill appear dur- © Inter-Research 2003 · www.int-res.com Feeding and energy budgets of larval Antarctic krill Euphausia superba in summer Bettina Meyer1,*, Angus Atkinson2, Bodo Blume1, Ulrich V. Bathmann1 1Alfred Wegener Institute for Polar and Marine Research, Department of Pelagic Ecosystems, Handelshafen 12, 27570 Bremerhaven, Germany 2British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, United Kingdom ABSTRACT: The physiological condition and

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