ON THE RAINBOW TROUT (SALMO GAIRDNERII IRIDEUS) IN LAKE TITICACA SOUTH AMERICA

Studies in the development of the rainbow trout (Salmo irideus).

Studies on Rainbow Trout Egg (Salmo gairdnerii irideus). V. Further Studies on the Yolk Protein during Embryogenesis

There have been found at least three kinds of protein m the yolk throughout the embryogenesis of rainbow trout, by electrophoretic analysis1l. In rainbow trout it is well known that the egg hatches out in 20-30 days after fertilization and the yolk content in the sac fry lasts for a further period of 20-30 days, then signs of starvation begin to appear. Therefore, it was suggested that the yolk...

Observations on Hepatic Cell Hyperplasia, Adenoma, and Hepatoma of Rainbow Trout (salmo Gairdnerii).

been reported in fish, all of them in trout (924,34, 47). In 1955 a high incidence of hepatic tumors was found in rainbow trout in Italian hatcheries (9). Interest in these neoplasms was renewed recently when hepatic tumors were discovered in large numbers of hatchery-reared rainbow trout in the United States (928,35, 592,61, 64), Italy (920), and France (3, 30). The main varieties of tumors th...

Observations on Hepatic Cell Hyperplasia, Adenoma, and Hepatoma of Rainbow Trout (Salmo gairdnerii)4'

been reported in fish, all of them in trout (924,34, 47). In 1955 a high incidence of hepatic tumors was found in rainbow trout in Italian hatcheries (9). Interest in these neoplasms was renewed recently when hepatic tumors were discovered in large numbers of hatchery-reared rainbow trout in the United States (928,35, 592,61, 64), Italy (920), and France (3, 30). The main varieties of tumors th...

Reiteration frequency of the protamine genes in rainbow trout (Salmo gairdnerii).

Protamine mRNA was isolated in a very pure form from trout testis and used as a template for the synthesis of a complementary DNA of high specific activity. The cDNA represented a full copy of the mRNA template and was used in hybridization reactions with purified trout DNA to determine the number of genes for protamines in trout testis. Our results indicate that there are less than four genes ...