Furthermore, the increase in GnRH stimulates the synthesis and secretion of PRL in the pituitary of FW-adapted masu salmon
(Hirano, 1987; Onuma et al., 2009).
Furukuma et al  suggest that IGF-I itself directly stimulates synthesis and release of GTH early in gametogenesis in masu salmon, possibly acting as a metabolic signal that triggers the onset of puberty.
Effects of insulin-like growth factor I on GnRH-induced gonadotropin subunit gene expressions in masu salmon pituitary cells at different stages of sexual maturation.
Uniparental chromosome elimination has been shown in hybrids between masu salmon females and rainbow trout males using the GISH technique (Fujiwara et al.
Uniparental chromosome elimination in the early embryogenesis of the inviable salmonid hybrids between masu salmon and rainbow trout male.
Oshima and Wakai (13) investigated the characteristics of masu salmon harboring diphyllobothriid plerocercoids; rate of infection was 27%.
Some researchers have been examining a hypothesis that Japanese masu salmon are infected with the plerocercoid not in freshwater but in the sea during their migration through the Sea of Okhotsk, possibly through another intermediate host that links the freshwater copepod and the wild salmon at sea (14).
Similarly, Nakamura (31) induced complete feminization in masu salmon (Oncorhynchus masou) by administering 0.5 [micro]g/L 17[beta]-estradiol for 18 days, starting 5 days after hatching (fish were examined 90 DPH).
Feminization of masu salmon, Oncorhynchus masou, by administration of estradiol-17[beta].
A study by Nakamura (1984) examined sex distribution in masu salmon (Oncorhynchus masou) immersed in 17[Beta]-estradiol starting at 5 d post-hatching for 18 d.
Effects of 17-estradiol on gonadal sex differentiation in two species of salmonids, the masu salmon, Oncorhynchus masou, and the chum salmon, O.