Energy metabolism during development of eggs and larvae of gilthead sea bream (Sparus aurata)

I. Rønnestad, W. M. Koven, A. Tandler, M. Harel, H. J. Fyhn

Research output: Contribution to journalArticlepeer-review

121 Scopus citations


Developing eggs and larvae of laboratory-reared gilthead sea bream (Sparus aurata) maintained in filtered seawater (40 ppt) at 18°C, were measured for oxygen uptake, ammonia excretion, contents of free amino acids (FAA), protein, fatty acids (FA) accumulated ammonia, and volumes of yolk-sac and oil globule. Absorption of the yolk coincided with the consumption of FAA and was complete ca. 100 h post-fertilisation. Amino acids from protein were mobilised for energy in the last part of the yolk-sac stage. Absorption of the oil globule occurred primarily after hatching following yolk absorption, and correlated with catabolism of the FA neutral lipids. Overall, FAA appear to be a significant energy substrate during the egg stage (60 to 70%) while FA from neutral lipids derived from the oil globule are the main metabolic fuel after hatching (80 to 90%).

Original languageEnglish
Pages (from-to)187-196
Number of pages10
JournalMarine Biology
Issue number2
StatePublished - 1 Sep 1994
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Aquatic Science


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