Ontogenesis of diurnal rhythms of cAMP concentration, outer segment disc shedding and retinomotor movements in the eye of the brown trout, Salmo trutta

Brain Behav Evol. 1989;34(1):65-72. doi: 10.1159/000116492.

Abstract

Histological analyses of the retina of Salmo trutta post-embryos exhibit rhythmic disc shedding at 6 weeks, followed by cyclic retinomotor movements at 7 weeks. Diurnal variations in cAMP concentration, as established by a radioreceptor assay, develop simultaneously with retinomotor movements and are fully expressed at 9.5 weeks. In continuous darkness, neither retinomotor movements nor intra-ocular peaks of cAMP occur, indicating that the endogenous oscillator for retinomotor movements and cAMP levels is not yet developed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Circadian Rhythm*
  • Cyclic AMP / physiology*
  • Dark Adaptation / physiology
  • Light
  • Melanins / physiology
  • Metamorphosis, Biological*
  • Phagosomes / physiology
  • Photoreceptor Cells / cytology*
  • Pigment Epithelium of Eye / cytology*
  • Retina / cytology*
  • Rod Cell Outer Segment / cytology*
  • Salmonidae / growth & development*
  • Trout / growth & development*
  • Visual Perception / physiology*

Substances

  • Melanins
  • Cyclic AMP