Endocrine changes during natural spawning in the white sucker, Catostomus commersoni. II. Steroid hormones.


Blood samples were taken from white suckers (Catostomus commersoni) during their annual spring spawning migration and analyzed by radioimmunoassay for gonadotropin (GtH), estradiol-17 beta (E2), testosterone (T), 11-ketotestosterone (11-KT), 17 alpha-hydroxyprogesterone (17-P), 17 alpha-hydroxy-20 beta-dihydroprogesterone (17, 20-P), androstenedione (A… (More)


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