The potential involvement of 17β-estradiol in the regulation of pituitary and testicular function
was investigated in male goldfish at various times during the seasonal reproductive cycle …

Sexually mature female goldfish were treated daily with 17β-estradiol in oil (2 μg∙ g body
weight− 1) or given a single silastic pellet containing 17β-estradiol (50 μg∙ g− 1) and held …

Plasma hormone changes during ovulation and the effects of steroid hormones on plasma
gonadotropin (GtH) levels and ovulation were studied in the female goldfish. Ovulation was …

Levels of plasma estradiol-17β, testosterone, progesterone, 17α-hydroxyprogesterone (17α-
OHprog) and 17α, 20β-dihydroxy-4-pregnen-3-one (17α, 20β-diOHprog) were assayed by …

The sea bream (Sparus aurata) is a protandrous hermaphrodite teleost fish in which
estrogen administration induces testicular regression without influencing ovarian …

The objective of the present study was to investigate the in vivo effects of different doses of
17β-estradiol (E 2) and testosterone (T) on the levels of plasma and pituitary gonadotropin II …

Plasma levels of 17β-oestradiol, testosterone, 17α-hydroxy-20β-dihydroprogesterone, 17α-
hydroxyprogesterone, and gonadotrophin were measured in 14 female rainbow trout during …

Hormone profiles during the ovulatory cycle were studied in goldfish. Blood samples were
taken from female goldfish every 4 days between 1400 and 1700 hr during the course of …

The effects of gonadal steroids on gonadosomatic index (GSI; gonad wt/total body wt× 100),
pituitary gonadotropin (GTH) content, and serum GTH response to [d-Ala6, Pro9-Net] …

Annual changes in the plasma levels of gonadotropin (GtH) and steroid hormones were
studied in goldfish. Plasma GtH levels in both sexes were low during winter, and rapidly in …