A5070001871- Fish Ecology and Management Studies
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Marine and fisheries research
- Fish Biology and Ecology Studies
- Aquatic Invertebrate Ecology and Behavior
- Genetic diversity and population structure
- Diverse Educational Innovations Studies
- Genetic and phenotypic traits in livestock
- Advanced Causal Inference Techniques
- Environmental DNA in Biodiversity Studies
- Coastal and Marine Management
- Wildlife Ecology and Conservation
- Environmental Toxicology and Ecotoxicology
- Water Quality and Resources Studies
- Identification and Quantification in Food
- Aquaculture Nutrition and Growth
- Hydrology and Watershed Management Studies
- Ecology and biodiversity studies
- Statistical Methods and Bayesian Inference
Hood Technology (United States)
2023
Cramer Fish Sciences (United States)
2013-2017
Rainbow trout (Oncorhynchus mykiss) have diverse life histories, including both freshwater-resident and anadromous “steelhead” life-history forms. Here, we demonstrate that female resident rainbow produce offspring survive return to spawn as adult steelhead. This study represents the first successful attempt quantify steelhead production rates from across a large watershed. Otolith microchemistry ( 87 Sr/ 86 Sr) techniques were used determine maternal history (resident or anadromous) of 498...
Diversion dams can negatively affect emigrating juvenile salmon populations because fish must pass through the impounded river created by dam, negotiate a passage route at dam and then emigrate riverine reach that has been affected reduced discharge. To quantify effects of main-stem diversion on Chinook in Yakima River, Washington, USA, we used radio telemetry to understand how operations discharge 18-km downstream route-specific survival. We found evidence direct mortality associated with...
For over 150 years, hatchery-origin anadromous salmon and trout have been reared released throughout the Pacific Northwest to mitigate for lost habitat sustain harvest opportunity. Some studies demonstrate that introgression of hatchery naturally produced fish may constrain conservation efforts through maladaptive genetic processes. However, empirical demonstrations influence these interactions on population productivity are lacking, making it difficult assess their importance relative other...
Abstract It is asserted that reduction or elimination of hatchery stocking will increase natural‐origin salmon Oncorhynchus spp. and steelhead O. mykiss production. We conducted an analysis population census data (1958–2017) to determine whether summer in the upper Clackamas River 1998 increased productivity winter steelhead. A Bayesian state–space stock–recruitment model was fitted adult set, estimated as a function hatchery‐origin spawner abundance well other environmental factors. When...
Efforts to recover depressed stocks of salmon and steelhead trout in North America include implementation mark-selective recreational fisheries, whereby anglers are allowed harvest hatchery-origin fish but must release natural-origin fish. Catch angling (C&R) is generally thought be an effective tool for conservation relative traditional retention fisheries due high survival released adult freshwater. Studies designed estimate C&R mortality have produced highly variable results among species...