In a sampling of fish from a creek that flows into San Diego Bay, nearly a quarter contain microplastics, according to a new study published in the journal PLOS ONE. The study, which examined plastics in coastal sediments and three species of fish, showed that the frequency and types of plastic ingested varied with fish species and, in some cases, size or age of fish.
Once the run is complete, a biologist with the Washington fishery department said that some 7.5 million pounds of eulachon, also known as Pacific smelt, will have entered the Columbia River. That’s 3 million pounds more than showed up in 2019.
A new Simon Fraser University-led study looking at the effects that glacier retreat will have on western North American Pacific salmon predicts that while some salmon populations may struggle, others may benefit.
The physical condition of a female steelhead at its first spawning can predict the ability of the fish to spawn a second time a year later, according to a recent study that measured body chemicals and condition in female hatchery fish.
Across the globe, humans are using freshwater resources faster than those resources can be naturally replenished. In the Western United States, for example, water extractions from the Colorado River have exceeded total river flow, causing rapid depletion of water storage reservoirs. In addition, as these water sources dry up, species of fish, plants and animals are also adversely impacted.
For the first time, researchers have used radar and other tools to accurately measure the volume of snow produced through cloud seeding.
In 2014, a disease of epidemic proportions gripped the West Coast of the U.S. You may not have noticed, though, unless you were underwater.
Steelhead reared in a hatchery for one year consistently outperformed males reared in the hatchery for two years when competing for spawning opportunities, although one and two year old female steelhead did not differ in their ability to produce offspring, according to recent study.
Chinook salmon smolts that rear in upper Willamette River reservoirs grow much faster and are larger than their counterparts that rear in streams, according to a recent study.