Publication Abstract

The dynamics of oocyte growth during vitellogenesis in the rainbow trout, Oncorhynchus mykiss

C.R. Tyler, J.P. Sumpter and P.R. Witthames

This report describes the dynamics of oocyte growth during vitellogenesis in a population of virgin female rainbow trout. Indicates of ovarian development increased dramatically during the period of study: the gonadosomatic index (GSI) increased over 50-fold, reaching a peak of 20 just before ovulation; the mean oocyte diameter increased from less than 1 mm to 5.4 mm; and plasma levels of vitellogenin increased from less than 1.5 mg/ml to 25 mg/ml.

Reference:

C.R. Tyler, J.P. Sumpter and P.R. Witthames, 1990. The dynamics of oocyte growth during vitellogenesis in the rainbow trout, Oncorhynchus mykiss. Biological Reproduction, 43: 202-209