Results 231 to 240 of about 6,162 (273)
Some of the next articles are maybe not open access.
The Controversy about Salmon Hatcheries
Fisheries, 2004Abstract The use of hatcheries has been a subject of lengthy debate in the management of salmon and trout resources in the Pacific Northwest. The problem has resulted in part from the wide distribution of hatchery fish in circumstances where natural populations were disadvantaged by management policy involving hatchery fish and the confusion of the ...
Ernest L. Brannon +10 more
openaire +1 more source
Calomel in the Diet of Hatchery Salmon
The Progressive Fish-Culturist, 1940(1940). Calomel in the Diet of Hatchery Salmon. The Progressive Fish-Culturist: Vol. 7, No. 51, pp. 24-26.
Richard T. Smith, Elmer Quistorff
openaire +1 more source
Optimization of feeding schedules in salmon hatcheries
SIMULATION, 1985A methodology is developed that determines feeding schedules which will reduce total food consumption for coho salmon in a hatchery during the rearing period. The method presented assumes that the feeding level has a parabolic mathematical form with respect to time.
Philip D. Corey, Marshall J. English
openaire +1 more source
The role of hatcheries in the decline of Lake Ontario Atlantic salmon
Canadian Journal of Fisheries and Aquatic Sciences, 2022Lake Ontario Atlantic salmon (Salmo salar) were one of the first species of fish to be cultured in Canada. Their story goes from abundance in the 1700s to protective legislation in 1807, then hatchery culture in 1866 and finally ends in extirpation in 1898.
Morrison, Brian P, Peiman, Kathryn
openaire +1 more source
The (unlikely) trajectory of learning in a salmon hatchery
Journal of Workplace Learning, 2005PurposeSociocultural learning theories, usually premised on participation in some community, explain workplace learning well up to a certain extent. The paper aims to extend beyond these and to account for learning in repetitive and mundane work environments from a dialectical perspective.Design/methodology/approachBased on a longitudinal ethnographic ...
Yew‐Jin Lee, Wolff‐Michael Roth
openaire +1 more source
Hatcheries and the Future of Salmon in the Northwest
Fisheries, 1992Abstract Artificial propagation is often seen as a way to maintain and increase or augment fish stocks that have suffered from habitat loss and overexploitation. Large-scale hatchery programs for salmonids in the Pacific Northwest have largely failed to provide the anticipated benefits; rather than benefiting the salmon populations, these programs may ...
openaire +1 more source
Social learning of prey location in hatchery-reared Atlantic salmon
Journal of Fish Biology, 2003 Naïve, hatchery-reared Atlantic salmon Salmo salar parr were paired with demonstrators that had been pre-trained to accept live prey from the surface or from the benthos. After 6 days of observing demonstrators through a clear perspex partition the naïve
Culum Brown
exaly +3 more sources
A genetic examination of spawning methodology in a salmon hatchery
Aquaculture, 1985Abstract Male pink salmon ( Oncorhynchus gorbuscha ) possessing unique biochemical genetic markers were used as gamete donors for experiments in which the relative potencies of the milt and possible effects of artificial spawning procedures on the relative contributions of milt were studied.
A.J. Gharrett, S.M. Shirley
openaire +1 more source
Untangling the Recreational Value of Wild and Hatchery Salmon
Marine Resource Economics, 2013Abstract Many Pacific salmon populations have declined to levels that have prompted their listing under the Endangered Species Act. In order to protect these populations and provide harvest opportunities for recreational anglers, the fishery is often managed with separate regulations for wild and hatchery salmon.
Leif E. Anderson, S. Todd Lee
openaire +1 more source
Recreational Use of Surplus Hatchery Coho Salmon
Transactions of the American Fisheries Society, 1969Abstract Returning surplus adult coho salmon (Oncorhynchus kisutch), principally sexually precocious males (jacks), were confined in 1,500 ft of stream adjacent to the Washougal River salmon hatchery near Camas, Washington. To increase the benefits from hatchery production, the Washington Department of Fisheries then opened the area to free fishing ...
Frank Haw, Stephen B. Mathews
openaire +1 more source