Results 81 to 90 of about 9,414 (203)

Direction and magnitude of natural selection on body size differ among age‐classes of seaward‐migrating Pacific salmon

Evolutionary Applications, 2020
Due to the mediating role of body size in determining fitness, the “bigger‐is‐better” hypothesis still pervades evolutionary ecology despite evidence that natural selection on phenotypic traits varies in time and space.
Marta E. Ulaski, Heather Finkle, Peter A. H. Westley   +2 more
doaj   +1 more source

Ecotoxicity Thresholds for Ametryn, Diuron, Hexazinone and Simazine in Fresh and Marine Waters [PDF]

, 2018
Triazine and urea herbicides are two groups of photosystem II inhibiting herbicides frequently detected in surface, ground and marine waters. Yet, there are few water quality guidelines for herbicides. Ecotoxicity thresholds (ETs) for ametryn, hexazinone
A Claver, A Hildebrandt, A Wightwick, D O’Brien, DA Hobbs, EC (European Commission), HJ Klimisch, IK Konstantinou, IK Konstantinou, JL Durda, JW Green, K Schneider, KR Solomon, KV Thomas, L Guzzella, M Gfrerer, M Muschal, M Ågerstrand, Michael St. J. Warne, MSJ Warne, MSJ Warne, Olivia King, P Mercurio, R Smith, RA Dam van, RA Smith, Rachael A. Smith, SM Peterson   +27 more
core   +1 more source

Parvicapsula pseudobranchicola in the northeast Pacific Ocean is rare in farmed Atlantic salmon Salmo salar despite widespread occurrence and pathology in wild Pacific salmon Oncorhynchus spp.

Parasites & Vectors, 2023
Background Infection with the myxozoan parasite Parvicapsula pseudobranchicola causes disease in wild and farmed salmonids in Norway. In the northeast Pacific Ocean, the parasite has been reported in Pacific salmon Oncorhynchus spp.
Simon R. M. Jones, Jessica C. Low, Aidan Goodall   +2 more
doaj   +1 more source

An omnivore's options: Altered predator behavior during periods of overlapping resource pulses

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract Resource pulses are ecologically important events that occur in most ecosystems, yet most of our previous knowledge about their effects comes from relatively simple single pulse systems. In reality, many consumers likely attempt to track multiple, sometimes overlapping, resource pulses through space and time.
Alex J. Jensen, Michael Muthersbaugh, Keller Brogdon, Charles R. Ruth, Joseph W. Butfiloski, Jennifer Adams, Lisette Waits, John C. Kilgo, David S. Jachowski   +8 more
wiley   +1 more source

Dividing population genetic distance data with the software Partitioning Optimization with Restricted Growth Strings (PORGS): an application for Chinook salmon (Oncorhynchus tshawytscha), Vancouver Island, British Columbia [PDF]

, 2009
A new method of finding the optimal group membership and number of groupings to partition population genetic distance data is presented. The software program Partitioning Optimization with Restricted Growth Strings (PORGS), visits all possible set ...
Beacham, Terry D., Bonnell, R. Gregory, Candy, John R., Wallace, Colin G., Withler, Ruth. E.   +4 more
core  

Climate vulnerability assessment for Pacific salmon and steelhead in the California Current Large Marine Ecosystem. [PDF]

, 2019
Major ecological realignments are already occurring in response to climate change. To be successful, conservation strategies now need to account for geographical patterns in traits sensitive to climate change, as well as climate threats to species-level ...
Beechie, Tim, Bograd, Steven J, Boughton, David A, Carr, Mark, Cooney, Thomas D, Crozier, Lisa G, Dunham, Jason B, Greene, Correigh M, Haltuch, Melissa A, Hazen, Elliott L, Holzer, Damon M, Huff, David D, Johnson, Rachel C, Jordan, Chris E, Kaplan, Isaac C, Lindley, Steven T, Mantua, Nathan J, McClure, Michelle M, Moyle, Peter B, Myers, James M, Nelson, Mark W, Spence, Brian C, Weitkamp, Laurie A, Williams, Thomas H, Willis-Norton, Ellen   +24 more
core   +1 more source

Availability of Chinook and sockeye salmon as prey to Cook Inlet beluga whales

Frontiers in Marine Science
Cook Inlet beluga whales (CIBW) are an endangered population of toothed whales in southcentral Alaska that have not shown signs of recovery over the past two decades.
Jordy Bernard, Bill Templin, Adam Reimer, Timothy McKinley, Kalin Kellie, Kate Lomac-MacNair, Megan Blees, Morgan Bender, Morgan Bender, Milo Adkison, Lori Polasek, Lori Quakenbush   +11 more
doaj   +1 more source

Range‐wide life history diversity and climate exposure in adult Chinook salmon

Ecosphere, Volume 17, Issue 3, March 2026.
Abstract Climate change is threatening ecologically and culturally important species. For species with broad ranges and complex life cycles, such as migratory Pacific salmon (Oncorhynchus spp.), climate exposure may vary across space and diverse life history strategies.
Anna Potapova, Jonathan W. Moore, Charles K. Parken, Matthew Sloat, William Atlas, Leslie A. Jones   +5 more
wiley   +1 more source

The Origins of New Zealand's Chinook Salmon, Oncorhynchus tshawytscha [PDF]

, 1994
Chinook salmon, Oncorhynchus tshawytscha, are well established as anadromous and landlocked runs in New Zealand. Ova introductions during the 1870's (probably from the McCloud River, California, U.S.A.), failed to generate anadromous stocks, but further ...
McDowall, Robert M.
core  

Coexisting patterns of population oscillations: the degenerate Neimark Sacker bifurcation as a generic mechanism

, 2010
We investigate a population dynamics model that exhibits a Neimark Sacker bifurcation with a period that is naturally close to 4. Beyond the bifurcation, the period becomes soon locked at 4 due to a strong resonance, and a second attractor of period 2 ...
A. Pikovsky, Barbara Drossel, Benjamin Reichardt, C. J. Walters, Christian Guill, M. di Bernardo, W. Just, Wolfram Just, Y. A. Kuznetsov   +8 more
core   +1 more source