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

abstract

• 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), and cortisol. GtH, 17-P, and 17,20-P levels were low in prespawning fish of both sexes, rose to their highest levels in ovulated females and spawning males, and then fell to low levels in spent fish. In females, E2, T, and A levels were high in prespawning fish and declined significantly at ovulation, dropping to lowest levels in spent fish. In males, 11-KT, T, and A levels were highest in prespawning fish, and lowest in spent fish. Cortisol levels were highest in spermiating males and ovulated females. Plasma profiles of the sex steroids in the white sucker are very similar to those observed in the rainbow trout (Salmo gairdneri).

authors

• Mackenzie, Duncan

published proceedings

• Gen Comp Endocrinol

author list (cited authors)

• Scott, A. P., MacKenzie, D. S., & Stacey, N. E.

citation count

• 202

complete list of authors

• Scott, AP||MacKenzie, DS||Stacey, NE

publication date

• January 1984

publisher

• Elsevier  Publisher

published in

• General and Comparative Endocrinology  Journal

keywords

• 17-alpha-hydroxyprogesterone
• Androstenedione
• Animals
• Circadian Rhythm
• Estradiol
• Female
• Fishes
• Gonadal Steroid Hormones
• Gonadotropins
• Hydrocortisone
• Hydroxyprogesterones
• Male
• Ovulation
• Reproduction
• Seasons
• Testosterone

Digital Object Identifier (DOI)

• 10.1016/0016-6480(84)90077-7

start page

• 349

end page

• 359

volume

• 56

issue

• 3

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2F0016-6480%2884%2990077-7