Masu Salmon

Masu Salmon

 

(Oncorhynchus masu), a migratory and freshwater fish measuring about 71 cm long and weighing about 9 kg. Young individuals have large black spots on the sides of the body; adults have alternating dark and raspberry-red stripes. The masu salmon is found off the Asian coast of the Pacific from Kamchatka to Korea and Japan. It spawns in summer in the upper courses of rivers and small tributaries. The young fish live in the river for one to two years and then migrate to the sea. In the south the masu salmon is a dwarf freshwater form. The fish reaches maturity in three to six years. It feeds on small fishes and crustaceans. A commercially important fish, the masu salmon can be bred and acclimatized.

REFERENCE

Smirnov, A. I. Biologiia, razmnozhenie i razvitie tikhookeanskikh lososei. Moscow, 1975.
References in periodicals archive ?
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.
Furukuma et al [54] 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.
Stimulatory effects of insulin-like growth factor 1 on expression of gonadotropin subunit genes and release of follicle-stimulating hormone and luteinizing hormone in masu salmon pituitary cells early in gametogenesis.
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.
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.