Entries by CBB

Oregon Study Shows How Songbirds Work Together To Mob Predator Owls

Fleeing isn’t the only way by which songbirds can protect themselves against predators. Many songbird species are known to engage in mobbing, where they gather aggressively around a bird of prey, flying rapidly while making stereotypic movements and loud vocalizations. Mobbing is risky for both parties: birds of preys have been observed to attack their mobbers, while cases are known of birds of prey getting injured by mobbing songbirds.

Pending Court Decision Could Decide Fate Of SE Alaska Chinook Trolling Seasons, Increased Salmon For Endangered Killer Whales

Commercial fishers in Southeast Alaska waters may soon lose two trolling seasons for Chinook salmon in order to provide more fish for endangered Southern Resident killer whales in Puget Sound. As a result of the possible termination of that fishery, the whales could gain nearly 5 percent in available prey, according to a judge’s recent report in a Washington federal court.

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Council Reaches Out To State Agencies To Discuss ‘Alarming Conclusions’ Of Study Detailing Impacts To Salmon From Cormorants On Astoria Bridge

The Northwest Power and Conservation Council has asked the owner of the Astoria-Megler Bridge in Astoria to meet with them to talk about the double-crested cormorant problem in the Columbia River estuary.

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Top Predator Feeding On Top Predator: After Eliminating Deer On Alaska Island, Wolves Now Stalking, Eating Sea Otters

Wolves on an Alaskan island caused a deer population to plummet and switched to primarily eating sea otters in just a few years, a finding scientists at Oregon State University and the Alaska Department of Fish and Game believe is the first case of sea otters becoming the primary food source for a land-based predator.

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USGS Says Drought, Pesticides Have Reduced Western Bumble Bee By 57 percent, Could Rise To 97 Percent In Some Regions

The western bumble bee was once common in western North America, but increasing temperatures, drought, and pesticide use have contributed to a 57% decline in the occurrence of this species in its historical range, according to a new U.S. Geological Survey-led study. 

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With Spring Heatwaves, Rapid Melt, April 1 May No Longer Be Reliable Benchmark For Evaluating Snowpack Levels, Western Water Supplies

Snow-capped mountains aren’t just scenic – they also provide natural water storage by creating reservoirs of frozen water that slowly melt into watersheds throughout the spring and summer months. Much of the Western U.S. relies on this process to renew and sustain freshwater supplies, and new research underscores the impacts of extreme weather conditions on this annual cycle. 

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Research Shows Microplastics Increase Severity of IHNV, Virulent Pathogen In Salmonid Aquaculture

Microplastics—tiny particles generated as plastics weather and fragment—pose a growing threat to ecosystem and human health. A new laboratory study shows these threats extend beyond direct physical or chemical impacts, revealing that the presence of microplastics increases the severity of an important viral fish disease.

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Your Hike Impacting Wildlife Behavior: WSU Glacier Park Study Shows How Trail Use Has Strong Negative Influence On Animal Movement

Even without hunting rifles, humans appear to have a strong negative influence on the movement of wildlife. A study of Glacier National Park hiking trails during and after a COVID-19 closure adds evidence to the theory that humans can create a “landscape of fear” like other apex predators, changing how species use an area simply with their presence.

How Much Are Sea Lions, Seals Contributing To Salmon Decline In Washington Waters? Will Require Targeted Lethal Removal To Find Out

There is a “preponderance” of evidence that sea lions and seals (pinnipeds) in Washington’s Salish Sea and outer coast have contributed to the decline of salmon and steelhead in state waters, concludes a recent report by the Washington State Academy of Sciences.

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PNNL Research: Water Resources Managers Need To Take Heed Of Western Winter Storms Getting Larger, Wetter

New research shows that the wettest and most extreme winter storms in the Western United States are only growing wetter and larger. These powerful storms are changing shape in a warmer world, sprawling to drench more land while simultaneously growing more intense at their cores.

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Petition Filed Asking USFWS To Reintroduce Sea Otters Along West Coast

The Center for Biological Diversity submitted a petition this week asking the U.S. Fish and Wildlife Service to reintroduce sea otters to a large stretch of the West Coast. Threatened southern sea otters occupy only 13% of their historic range, and a small population of the animals currently lives on California’s central coast.

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PNW Study: Landslides Size, Frequency Influenced By Road Building, Logging More Than Heavy Rain

A long-term Pacific Northwest study of landslides, clear-cutting timber and building roads shows that a forest’s management history has a greater impact on how often landslides occur and how severe they are compared to how much water is coursing through a watershed.

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Toxic Toilet Paper Chemical, Other ‘Forever Chemicals’ Found In Bodies Of Endangered Southern Resident Killer Whales, Moved Up Food Chain

A chemical used in the production of toilet paper and ‘forever chemicals’ have been found in the bodies of orcas in British Columbia, including the endangered southern resident killer whales.

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BPA Urged To Distribute More Excess Revenue To Salmon Recovery, 70 Percent Going To Keep Rates Down, 10 Percent Fish

Bonneville Power Administration will divvy up $500 million of excess revenue from its 2022 fiscal year, giving 70 percent to its customers to keep power rates down, 20 percent to pay down debt or for revenue financing and just 10 percent to its fish and wildlife program, mostly to help pay upkeep for hatcheries and fish screens, not directly for recovery of salmon and steelhead.

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Conservationists To Sue Agencies Over Deschutes Habitat Conservation Plan, Say Won’t Protect ESA-Listed Oregon Spotted Frog

The Center for Biological Diversity filed a formal notice this week of its intent to sue two federal agencies for approving a habitat conservation plan in the upper Deschutes River that it says fails to ensure that Wickiup Dam water-release operations won’t drive the threatened Oregon spotted frog extinct.

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