Daily rhythms of insulin and glucose levels in the plasma of sea bass Dicentrarchus labrax after experimental feeding

Gen Comp Endocrinol. 1984 Sep;55(3):393-7. doi: 10.1016/0016-6480(84)90009-1.


Significant and inverse circadian rhythms are demonstrated in glucose and plasma insulin in fish fed a natural diet. The highest glucose levels are found during the light period, around feeding time, and the insulin level peaks during the dark period. As a possible cause for the insulin rhythmicity, the daily variations in several plasma amino acids are considered. The feeding times could be a training factor for metabolic rhythms, which are maintained even during a fast of 7 days. The differences in the compositions of the diets could be responsible for the lack of circadian rhythms in fish fed on a commercial diet.

MeSH terms

  • Animals
  • Blood Glucose / analysis*
  • Circadian Rhythm*
  • Diet*
  • Dietary Carbohydrates / administration & dosage
  • Dietary Proteins / administration & dosage
  • Fishes / blood*
  • Insulin / blood*


  • Blood Glucose
  • Dietary Carbohydrates
  • Dietary Proteins
  • Insulin