Nom du corpus

Corpus Systématique Animale

Titre du document

Lipid content and composition of three species of Antarctic fish in relation to buoyancy

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Poissons_v2b_001732
Auteur(s)
  • A. Clarke 1
  • N. Doherty 1
  • A. L. DeVries 2
  • J. T. Eastman 3
Affiliation(s)
  • 1) British Antarctic Survey, NERC, High Cross, Madingley Road, CB3 0ET, Cambridge, UK
  • 2) Department of Physiology and Biophysics, University of Illinois, 524 Burrill Hall, 61801, Urbana, IL, USA
  • 3) Department of Zoology, Ohio University, 45701, Athens, OH, USA
Résumé

The lipip content and composition of various tissues from three species of nototheniid fish from McMurdo Sound, Antarctic have been examined in relation to their habitat and buoyancy. The pelagic midwater Dissostichus mawsoni is neutrally buoyant. It is rich in lipid which is located subcutaneously, as adipose tissue associated intimately with white muscle, and as lipid droplets within the cells of various tissues. White muscle, red muscle and liver are particularly lipid-rich, although the liver is not positively buoyant. The amount of lipid stored in the white muscle increases towards the centre of buoyancy of the fish. These deposits are documented at the anatomical, histological and ultrastructural levels. Tissues of Pagothenia borchgrevinki contain less lipid than D. mawsoni, but liver, red muscle and white muscle are still very rich in lipid. This species is cryopelagic, that is it spends most of the time in the water column just beneath the surface ice layer. It is not neutrally buoyant, but has a low weight in seawater. The tissues of the benthic Trematomus bernacchii contain only normal levels of lipid. The lipid class compositions of all three species are dominated by triacylglycerol, particularly when lipid contents are high. Serum lipids are an exception in containing high levels of the transport lipid sterol ester. The reason why Antarctic fish use triacylglycerols for buoyancy rather than was esters (as used by many myctophids) or squalene (as used by some sharks) is unclear.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - vertebres: zoologie generale, morphologie, phylogenese, systematique, cytogenetique, repartition geographique
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - General Agricultural and Biological Sciences
Catégories WoS
  • 1 - science ; 2 - ecology
  • 1 - science ; 2 - biodiversity conservation
Identifiant ISTEX
25E6216E7F956869F3AF1331C08D2D1C3C4E0E61
Revue

Polar Biology

Année de publication
1984
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.868
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-0RJ9MHRN-G
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