The occurrence of increased activity of the thyroid gland in rainbow trout at the time of transformation from parr to silvery smolt.
D000818:Animals; D017686:Oncorhynchus mykiss; D012834:Silver; D018030:Silver Compounds; D013960:Thyroid Function Tests; D013961:Thyroid Gland / Q000502:physiology*; D014337:Trout
THYROID/in trout; THYROID/physiology