Changes in Plasma 17-hydroxycorticosteroids Accompanying Sexual Maturation and Spawning of the Pacific Salmon (oncorhynchus Tschawytscha) and Rainbow Trout (salmo Gairdnerii).

Degenerative changes in the cardiovascular system of the spawning Pacific salmon (Oncorhynchus tshawytscha).

ACCOMPANYING sexual maturation and . spawning of the Pacific salmons, there occurs a series of histological and physiological changes which simulate closely those characteristic of Cushing's syndrome and experimental hyperadrenocortieism." These consist principally of marked hyperplasia of the adrenal cortical tissue, a many-fold increase in the plasma concentration of 17-hydroxycorticosteroids...

Effects of skin removal on contaminant levels in salmon and trout filets.

Skin removal is a generally accepted method to reduce exposure to contaminants through fish consumption. However, inconsistent results from studies on the effectiveness of this method suggest influence of other factors such as characteristics of contaminants and fish species. This study investigated the effects of skin removal on the lipid contents and concentrations of total mercury, α-chlorda...

Modulation of the effectiveness of 17 α-hydroxy-20 β-dihydroprogesterone or of a gonadotrophic extract on the in vitro intrafollicular maturation of oocytes of the Rainbow trout Salmo gairdnerii by various non-maturing

Rainbow Trout, Oncorhynchus mykiss

Rainbow trout are classified as Oncorhynchus mykiss, and as such belong to the same genus as Pacific salmon, and to the family Salmonidae, which includes Atlantic salmon (Salmo salar), various trout (Salvelinus sp.), Arctic char (Salvelinus alpinus), Arctic grayling (Thymallus arcticus) and whitefish (Coregonus sp.). Rainbow trout are native to areas around the North Pacific Ocean, from souther...

Effects of sex steroids, sex, and sexual maturity on cortisol production: an in vitro comparison of chinook salmon and rainbow trout interrenals.

Sex steroids appear to be responsible for hyperactivation of the hypothalamus-pituitary-interrenal (HPI) axis that occurs in mature semelparous Pacific salmon as a prelude to post-spawning (programmed) death. This study was undertaken to examine the direct effects of sex steroids on interrenal activity of semelparous (chinook salmon) and iteroparous (rainbow trout) salmonids using an in vitro i...