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Marine Biology

, Volume 91, Issue 2, pp 149–159 | Cite as

Lipid composition of twenty-two species of Antarctic midwater zooplankton and fish

  • S. B. Reinhardt
  • E. S. Van Vleet
Article

Abstract

Total lipids, hydrocarbons, wax esters, triacylglycerols, and phospholipids were determined for 22 major biomass species of zooplankton and fish in an Antarctic mesopelagic community that were collected in 1982 and 1983. Lipid levels were similar to levels in more temperate mesopelagic species. Total lipid concentration was depth related, with all lipid-rich species being collected at depths greater than 230 m. Wax ester content in copepods (60 to 70% of the total lipid) was generally higher than in subtropical species. Lipids indicated three predator-prey relationships (Parandania boecki-Atolla wyvillei, Thysanoessa macrura-Calanoides acutus andEurythenes gryllus-Atolla wyvillei). These were confirmed by gut content analyses. The mesopelagic fishBathylagus antarcticus, Pleuragramma antarcticum, andProtomyctophum bolini stored most lipid intramuscularly, whereasElectrona antarctica andGymnoscopelus nicholsi contained extensive stores in subcutaneous lipid sacs. The intramuscular lipids inP. antarcticum and the subcutaneous lipid sacs ofE. antarctica were primarily wax esters, possibly used for increased buoyancy or long-term energy storage. Unlike the odd-carbon preference of aliphatic hydrocarbons which typifies terrestrial plants and temperate marine organisms, even-carbon chain-length paraffins predominate in 80% of the Antarctic species analyzed. Although the source of these even-carbon n-alkanes cannot be determined from our data, their dominance in the species analyzed suggests that an unusual biochemical pathway may be responsible for their synthesis in this ecosystem.

Keywords

Total Lipid Aliphatic Hydrocarbon Antarctic Species Subtropical Species Total Lipid Concentration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • S. B. Reinhardt
    • 1
  • E. S. Van Vleet
    • 1
  1. 1.Department of Marine ScienceUniversity of South FloridaSt. PetersburgUSA

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