Tag: harbor seals

Minor bridge modifications could help young steelhead escape from Hood Canal

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Help could be on the way for migrating steelhead and salmon in Hood Canal, where many young fish are killed each year by seals and other predators that lie in wait at the Hood Canal floating bridge. As many as 50 percent of the steelhead migrants perish as they arrive at the bridge, where predators pick them off one by one. The bridge is supported by floating concrete pontoons, forming a nearly solid barrier across the waterway. Young steelhead generally swim near the surface, making them especially vulnerable to predation, […]

Do we know enough to do anything about all the seals and sea lions in Puget Sound?

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Scientists have known for years that Chinook salmon are important to southern resident orcas, but Chinook are not the only fish the whales eat. At the moment, chum salmon are returning to Puget Sound, and recent orca sightings suggest that the whales may now be feeding on chum. Harbor seals also eat Chinook salmon, but also chum, coho and other fish. They seem fond of smaller fish like herring and juvenile salmon. Oh, what a tangled food web we weave… Can we really say that seals are stealing the lunch […]

Could anchovies and other fish take pressure off salmon and steelhead?

A harbor seal hunting anchovies. From Howe Sound Ballet video by Bob Turner: https://youtu.be/Ycx1hvrPAqc
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A recent influx of anchovies into Puget Sound may have saved some steelhead from predators, but researchers seek more evidence to prove the connection. Our series on the Salish Sea Marine Survival Project continues with a look at these and other potential impacts from predators on the region’s salmon and steelhead. Read the story in Salish Sea Currents. 

Study would explore changes to protections for seals and sea lions

Harbor Seals sunning on intertidal rocks of Puget Sound. Photo: Tony Cyphert (CC BY-NC-ND 2.0) https://www.flickr.com/photos/tony717/14630242564
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As wildlife managers work to recover Puget Sound’s diminished Chinook population, a proposed white paper is expected to review the impacts of some of the salmon’s chief predators. The study would include a section on potential management of seals and sea lions, prompting open discussion of a long taboo subject: Could officials seek to revise the Marine Mammal Protection Act — or even conduct lethal or non-lethal removal of seals and sea lions in some cases? Such actions are hypothetical, but we look at some of the ongoing discussions around […]

Seals and sea lions may be slowing salmon recovery, hurting orcas

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Increased consumption of Chinook salmon by seals and sea lions in the Salish Sea “could be masking the success of coastwide salmon recovery efforts,” according to a new study published this week in the journal Scientific Reports. Endangered resident orcas are said to be declining in part due to a lack of available Chinook, the orcas’ preferred prey. Read the article by PSI senior writer Christopher Dunagan in Salish Sea Currents.

Study of seals and sea lions gains interest

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Our story last week about the impacts of predators on Chinook salmon populations in Puget Sound continues to gather strong interest from our readers. Several thousand viewed it after it came out last Thursday, and it was reprinted in the Kitsap Sun on Monday. The story was written by PSI senior writer Christopher Dunagan and reports on a new study showing that area seals and sea lions are eating a much higher amount of threatened Chinook than previously known. Many questions still remain, but it is the first time that a peer-reviewed […]

Study says predators may play major role in Chinook salmon declines

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A new study shows that increased populations of seals and sea lions are eating far more of Puget Sound’s threatened Chinook than previously known, potentially hampering recovery efforts for both salmon and endangered killer whales. Read the story in Salish Sea Currents.