Precocious male coho are of limited economic value and control of their numbers returning to the hatchery or the increased survival of full-sized adults would be beneficial. Factors influencing
early sexual maturation and attempts to suppress this maturation of males through the incorporation of a hormone in the diet, treatment...
Rehabilitation of Bully Creek Reservoir, its tributaries, and segments of the Malheur River system was completed in 1963. All waters treated supported large populations of undesirable fish. The treatment procedures are discussed by project segment within the report. A portion of the funds was appropriated by the U. S. Bureau...
The effectiveness of tangential flow filtration (TFF) for
recovery of infectious hematopoietic necrosis virus (IHNV) and
infectious pancreatic necrosis virus (IPNV) from large volumes of
water was evaluated. In laboratory studies, virus recovery from
IHNV-seeded water following concentration by TFF was approximately
13%. However, addition of 0.1 and 1% FBS...
Fintrol-5 was experimentally tested in six isolated gold dredge ponds in Sumpter Valley. The tests revealed all coarse fish in treated ponds were killed in a period varying between 7 hours and 144 hours; toxic water subbing from treated ponds would kill fish in downstream ponds if water table dillution...
