Changes in body composition and fatty acid profile during embryogenesis of quillback rockfish (Sebastes maliger)

Sewall, Fletcher F. and Rodgveller, Cara A. (2009) Changes in body composition and fatty acid profile during embryogenesis of quillback rockfish (Sebastes maliger). Fishery Bulletin, 107(2), pp. 207-220.

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Abstract

We investigated developmental changes in the body compositions and fatty acid (FA) profiles of embryos and preparturition larvae of the quillback rockfish (Sebastes maliger). Comparisons of proximate composition data from early-stage embryos with data from hatched preparturition larvae taken from wild-caught gravid females indicated that embryos gain over one-third their weight in moisture while consuming 20% of their dry tissue mass for energy as they develop into larvae. Lipid contributed 60% of the energy consumed and was depleted more rapidly than protein, indicating a protein-sparing effect. Oil globule volume was strongly correlated with lipid levels, affirming its utility as an indicator of energetic status. FA profiles of early embryos differed significantly from those of hatched larvae. Differences in the relative abundances of FAs between early embryos and hatched larvae indicated different FA depletion rates during embryonic development. We conclude that some metabolically important FAs may prove useful in assessing the condition of embryos and preparturition larvae, particularly 20:4n-6, which cannot be synthesized by many marine fish and which is conserved during embryogenesis. Variability in body composition and energy use among rockfish species should be considered when interpreting any measures of condition.

Item Type: Article
Title: Changes in body composition and fatty acid profile during embryogenesis of quillback rockfish (Sebastes maliger)
Personal Creator/Author:
CreatorsEmail
Sewall, Fletcher F.
Rodgveller, Cara A.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 107
Number: 2
Page Range: pp. 207-220
Date: 2009
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8803
Depositing User: Patti M. Marraro
Date Deposited: 11 Jun 2012 18:29
Last Modified: 11 Jun 2012 18:29
URI: http://aquaticcommons.org/id/eprint/8803

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