A recent report on pinniped predation shows that the presence of California sea lions at Bonneville Dam has declined significantly since 2015 when 195 of the marine mammals were observed by the U.S. Army Corps of Engineers in the dam’s tailraces. The number in 2021 was just 24.
In a new finding that goes against current conservation paradigms, re-introducing wolves and other predators to our landscapes does not miraculously reduce deer populations, restore degraded ecosystems or significantly threaten livestock, according to a new study.
Animals that live in groups tend to be more protected from predators. That idea might be common sense, but it’s difficult to test for some species, especially for wild populations of fish that live in the ocean.
In the future, cameras could spot blackbirds feeding on grapes in a vineyard and launch drones to drive off the avian irritants, then return to watch for the next invading flock. All without a human nearby.
The same federal agency that previously had hazed and culled Caspian terns and double-crested cormorants at East Sand Island in the lower Columbia River estuary in order to reduce predation on salmon and steelhead smolts is now hazing cormorants nesting on the Astoria-Megler Bridge six miles upstream.
An effort by tribes, the state of Washington and federal agencies to suppress or eradicate invasive Northern Pike is bearing fruit in Lake Roosevelt, the reservoir behind Grand Coulee Dam, according to an update by biologists at this week’s meeting of the Northwest Power and Conservation Council’s Fish and Wildlife Committee.
European green crabs feast on shellfish, destroy marsh habitats by burrowing in the mud and obliterate valuable seagrass beds. The invasive species also reproduces quickly, making it a nightmare for wildlife managers seeking to control its spread in Washington’s marine waters.
NOAA Fisheries and its Pinniped Task Force closed a chapter of its program to lethally remove California sea lions from Bonneville Dam. Determining that the removal of the sea lions saved nearly 56,000 adult salmon and steelhead, the Task Force called the 15-year effort a success.
In a new study, University of Montana researchers found that climate change drives native trout declines by reducing stream habitat and facilitating the expansion of invasive trout species.