Journal Title
Title of Journal: Mar Biol
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Abbravation: Marine Biology
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Publisher
Springer Berlin Heidelberg
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Authors: Toshihiro Yoshida Patti Virtue So Kawaguchi Peter D Nichols
Publish Date: 2011/06/21
Volume: 158, Issue: 10, Pages: 2313-2325
Abstract
The present study addresses the effect of maternal diet on hatching success and condition of embryos and larvae of Antarctic krill Euphausia superba Lipid and fatty acid content and composition were determined in field and laboratory samples Developmental stages analyzed in embryos included multiplecell gastrula and limbbud stages Larval stages analyzed included nauplius I nauplius II and metanauplius Laboratoryreared embryos were spawned by gravid females incubated under three feeding groups 1 phytoplankton mixture 2 phytoplankton mixture and minced clam and 3 phytoplankton mixture minced clam and commercial larval food Hatching success was highest in group 3 100 lowest in group 1 0 and highly variable in field samples 0–48 Lipid decreased slightly in embryos during embryonic development while large decreases in lipid were found during nauplius development High levels of 182n6 204n6 and 226n3 observed with group 3 samples coincided with high hatching success in krill embryos The ratio of 226n3/205n3 also correlated to hatching success of embryos The fatty acid profile of embryos in group 3 was similar to that of the fieldcollected embryos reflecting the contribution of the commercial larval food in the maternal diet In our study the maternal diet was found to influence the fatty acid composition of embryos and in turn affects the hatching success of krill Specific polyunsaturated fatty acids appeared to play important roles in embryogenesis in krillWe thank the officers and crew of RV ‘Aurora Australis’ for their professional and friendly support during the marine research cruise BROKEWEST and P Cramp and R King for assistance with krill incubation We thank D Holdsworth M Miller and B Mooney for technical support during running of the GC–MS and lipid and fatty acid analyses We thank S Nicol for his constructive comments on the manuscript together with three anonymous journal referees This work is a contribution of the Antarctic Marine Ecosystems Program of the Antarctic Climate and Ecosystems Cooperative Research Centre funded by the Australian Governments Cooperative Research Centres Programme
Keywords:
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