Oocyte development and polypeptide dynamics during ovarian maturation in the red-claw crayfish Cherax quadricarinatus Academic Article uri icon


  • Summary Ovarian development in the red claw crayfish Cherax quadricarinatus is divided into two major phases, namely primary- and secondary-vitellogenesis. Two anatomically distinctive types of primary-vitellogenic ovary are present: one contains uniform milky white oocytes (in the chromatin, chromatin-nucleolus, early-perinuclear and late-perinuclear stages), while the other contains two diversely colored oocyte populations, the smallest oocytes being uniform milky white and the largest being yellow to orange (i.e., at the lipid stage). Secondary-vitellogenic ovaries are characterized by the presence of a synchronously growing large oocyte group together with oocytes of all the first four, primary-vitellogenic stages. The synchronous group develops from the yolk stage via the prematuration stage into the maturation stage. Polypeptides of relatively low molecular masses (65–95 kDa) are abundant in the primary-vitellogenic ovary containing chromatin to lipid-stage oocytes. Polypeptides of relatively higher...

publication date

  • January 1, 2000