Seasonal variations in testicular germ cell stages and in plasma concentrations of sex steroids in male rainbow trout (Salmo gairdneri) maturing at 2 years old.

@article{Scott1989SeasonalVI,
  title={Seasonal variations in testicular germ cell stages and in plasma concentrations of sex steroids in male rainbow trout (Salmo gairdneri) maturing at 2 years old.},
  author={Alexander Pickering Scott and John P. Sumpter},
  journal={General and comparative endocrinology},
  year={1989},
  volume={73 1},
  pages={46-58}
}
Male rainbow trout of an autumn- and a spring-spawning strain were sampled every 28 days over a period of 2 years, starting when they were approximately 6 months old. Plasma concentrations of testosterone (T), 11-ketotestosterone (11-K), and 17 alpha,20 beta-dihydroxy-4-pregnen-3-one (17,20 beta-P) were measured by radioimmunoassay. A histometric method was… CONTINUE READING