Effects of N‐methyl‐D,L‐aspartate (NMA) on growth hormone and thyroid hormone levels in steroid‐primed immature rainbow trout (Oncorhynchus mykiss)

In this study we investigate whether the stimulatory action of the glutamate agonist, N‐methyl‐D,L‐aspartate (NMA) on growth hormone (GH) levels in rainbow trout (Oncorhynchus mykiss) is steroid hormone‐dependent. NMA was administered to sexually immature juvenile rainbow trout that had been primed with testosterone (T), 17β‐estradiol (E2) or 5α‐dihydrotestosterone and changes in plasma growth hormone (GH) concentrations were measured. NMA had …