Response of fish membranes to environmental temperature

T. Farkas, E. Fodor, K. Kitajka, J. E. Halver

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

The effect of temperature on fluidity, fatty acid and molecular species composition of liver and brain phospholipids in fish adapted or exposed to extreme temperatures was investigated. Membranes from cold-adapted fish were more fluid than those from warm-adapted fish. Ability to control membrane fluidity according to temperature appears in early ontogenesis and is first evident in swim-up fry of carp. Red blood cells as well as neurons of adult carp can continuously adjust the fluidity of their external membranes to changing temperatures. Segregation of choline and ethanolamine phosphoglycerides from livers of fish adapted to a cold/warm environment showed an accumulation of molecular species containing a monoenic fatty acid in position sn-1 and a polyenic fatty acid in position sn-2 of the molecule in cold conditions. Model experiments using mixtures of synthetic 18:1/22:6 phoshatidyl-ethanolamines and 16:0/18:1 phosphatidylcholines demonstrated the involvement of these molecular species in rendering the membranes less packed (more fluid) during adaptation to reduced temperatures.

Original languageEnglish
Pages (from-to)645-655
Number of pages11
JournalAquaculture Research
Volume32
Issue number8
DOIs
Publication statusPublished - 2001

Fingerprint

ambient temperature
membrane
fish
ethanolamine
fatty acid
temperature
fatty acids
carp
membrane fluidity
liver
fluid
rendering
choline
phospholipid
fish fry
phosphatidylcholines
ontogeny
brain
phospholipids
erythrocytes

Keywords

  • Adaptation
  • Brain
  • Fluidity
  • Membranes
  • Phospholipids
  • Temperature

ASJC Scopus subject areas

  • Aquatic Science

Cite this

Response of fish membranes to environmental temperature. / Farkas, T.; Fodor, E.; Kitajka, K.; Halver, J. E.

In: Aquaculture Research, Vol. 32, No. 8, 2001, p. 645-655.

Research output: Contribution to journalArticle

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