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 …

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 …

Abstract Changes in plasma hormone levels during spawning were studied in male goldfish.
Blood samples were analyzed for gonadotropin (GtH), testosterone, 11-ketotestosterone (11 …

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 …

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 …

Long-term (annual and seasonal) variations in plasma concentration of reproductive
hormones (maturational gonadotropin GTH and sex steroids) have been studied in relation …

17β‐oestradiol, testosterone, 11‐ketotestosterone and calcium were measured in plasma of
female rainbow trout over the course of a single spawning season. The patterns of rise and …

Goldfish, Carassius auratus, spawn several times within a spawning season. A
gonadotropin (GtH) surge occurs at the time of ovulation in this cyprinid species. This …

Effects of ovariectomy and steroid hormone implantation on blood gonadotropin (GtH) levels
were examined in sexually mature female goldfish. Ovariectomized fish had significantly …

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 …