Effects of thyroxine and methyltestosterone on smoltification of masu salmon ( Oncorhynchus masou)

• Published in: Aquaculture Vol. 45; no. 1; pp. 289 - 303
• Main Authors: Ikuta, Kazumasa, Aida, Katsumi, Okumoto, Naoto, Hanyu, Isao
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.04.1985; Elsevier Science
• Subjects: Biological and medical sciences; Development. Metamorphosis. Moult. Ageing; Fundamental and applied biological sciences. Psychology; Vertebrates: anatomy and physiology, studies on body, several organs or systems; Freshwater environment; Marine environment; Methyltestosterone; Edible fish; Vertebrata; Pisces; Aminoacid derivative hormone; Thyroxine; Sex steroid hormone; Metamorphosis

Administration of thyroxine (T 4; 250 μg/g diet) from 16 July to 24 December induced silvery skin in underyearling masu salmon, but failed to induce seawater adaptability, darkening of dorsal and caudal fin margins and slimness of the body. There was no difference in the percentage of precocious mal...