Natural Selections: “Couch potato” bass evolving in response to…

North Country Public Radio — The pressure to keep billions of humans fed can have a transformative impact on amimal populations. Overharvesting that targets the largest animals can result in reduction of the average size of species, as seen in Caribbean conch snails. And sport-fishing pressure on large mouth bass can winnow out the most agressive in the gene pool, resulting in a "lazier," more Read More…

Salmon Need Trees

Hakai Magazine — A new study stands as a striking reminder that logging watersheds has an outsized impact on salmon and trout. Led by Kyle Wilson at Simon Fraser University in British Columbia, the study looked at the successes and failures of five species of salmonids in the Keogh River (called Giyuxw by the local Kwakiutl First Nation) on northern Vancouver Island. For steelhead trout, Read More…

Researchers head to the mountains to improve weather and water…

NOAA Research News — As aspen leaves blazed across the Colorado Rockies this fall, NOAA scientists were busy installing a state-of-the-art observing network in a remote basin near Crested Butte to study how precipitation forms in the complex, high-altitude terrain of the West Elk Mountains. Their goal: improving weather and river flow prediction in a watershed critical to the region’s Read More…

OSU’s Marine Mammal Institute to develop wildlife distribution…

KTVZ — Oregon State University’s Marine Mammal Institute has been awarded a $2 million grant to collect data about distribution and density of marine mammals and seabirds that will be used to inform decisions about offshore wind energy development. The grant is one of four announced this month by the U.S. Department of Energy to support wind energy research. The surveys of seabirds, Read More…

Researchers say they’ve found evidence that salmon scarcity isn’t…

Anchorage Daily News — Researchers made a surprising discovery while tracking chinook salmon in both the foraging areas of endangered southern resident orcas and the growing, healthy population of the northern resident orcas in B.C. In a study published last week in the Canadian Journal of Fisheries and Aquatic Sciences, the researchers stated they expected to find the robust population of Read More…

Development and Evaluation of a Chinook Salmon Smolt Swimming…

MDPI — Hydrologic currents and swimming behavior influence routing and survival of emigrating Chinook salmon in branched migratory corridors. Behavioral particle-tracking models (PTM) of Chinook salmon can estimate migration paths of salmon using the combination of hydrodynamic velocity and swimming behavior. To test our hypotheses of the importance of management, models can simulate Read More…

Determining salmon provenance with automated otolith reading

bioRxiv — Synthetic otolith marks are used at hundreds of hatcheries throughout the Pacific Rim to record the release location of salmon. Each year, human readers examine tens of thousands of otolith samples to identify the marks in salmon that are caught. The data inform dynamic management practices that maximize allowable catch while preserving populations, and guide hatchery investments. Read More…

Research seeks resilience for aquifers

AgAlert — One day in early October, a group of University of California, Merced, students went to the campus Smart Farm, augurs in hand, to explore the soil for the best spots to locate moisture sensors. They were not looking in the root zone to monitor how much water is available but instead for areas lower in the soil to study how irrigation and stormwater can travel far enough beneath the Read More…

Southern resident killer whales encounter higher prey densities than…

Canadian Science Publishing — The decline of southern resident killer whales (Orcinus orca) may be due to a shortage of prey, but there is little data to test this hypothesis. We compared the availability of prey (Chinook salmon, Oncorhynchus tshawytscha) sought by southern residents in Juan de Fuca Strait during summer with the abundance and distribution of Chinook available to the much Read More…

Bioaccumulation potential of chlorpyrifos in resistant Hyalella…

ScienceDirect — Given extensive use of pesticides in agriculture, there is concern for unintended consequences to non-target species. The non-target freshwater amphipod, Hyalella azteca has been found to show resistance to the organophosphate (OP) pesticide, chlorpyrifos, resulting from an amino acid substitution in acetylcholinesterase (AChE), suggesting a selective pressure of unintended Read More…