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September 20, 2024

A Bigg's killer whale passes by the author's boat near Protection Island. Photo by Eric Wagner.">

Publish or perish the thought: Orcas, seals, and a curious scientist

In 2022, more than three million scientific papers were published in about thirty thousand journals. This represented something like a 9% increase over the year before, and a 47% increase since 2016. “Academic publishing has a problem,” wrote Mark A. Hanson, the biologist at the University of Exeter who compiled these figures. “The last few […]


October 12, 2023

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A no-death census year for Puget Sound’s orcas, with observations about a recent shift to more female births

For the first time since Census Year 1993, no deaths were reported this year among the Southern Resident killer whales, which frequent Puget Sound, according to the official census report. Two new births were reported among the whales, increasing the population from 73 to 75. I would also like to share some potentially hopeful information […]

August 4, 2023

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Two new baby orcas with no deaths over the past year could make for a remarkable census

This year’s census for the Southern Resident killer whales apparently will document two new calves but no deaths for the 12-month period ending July 1. According to my unconfirmed records, this will be the first time in nearly 30 years that no deaths will be reported in the annual census update. Consequently, the overall population […]

June 28, 2023

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Prey and predators create varying life-or-death conditions for salmon, as shown with Atlantis model

This article is the latest in a series about computer models and their uses within the Puget Sound ecosystem. As scientists uncover more and more information about a particular ecosystem, computer modelers are often eager to put that raw data to good use in complex models tuned to local conditions. One highly acclaimed model, called […]

June 23, 2023

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Southeast Alaska troll fishing restored for this year by court of appeals pending full legal review

Fishing in Southeast Alaska by the commercial troll-fishing fleet will not be cancelled this year, as ordered by a Seattle judge, thanks to a last-minute ruling by the U.S. Ninth Circuit Court of Appeals. Considerations for the economic damage that would be caused by shutting down the Alaskan fishery outweigh the “speculative environmental threats” that […]

June 8, 2023

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Health of killer whales examined through Bayesian network modeling and informed predictions

Qualitative network modeling, as shown in the previous post in Our Water Ways, is focused on actions that create either positive or negative results for actors in the model. This modeling approach is useful for considering the possible outcomes triggered by various actions, especially when data are lacking to develop mathematical relationships between the actors. […]

May 11, 2023

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Shutdown looms for Alaska summer troll fishery; court order aims to provide more salmon for orcas

Southern Resident killer whales, which frequent Puget Sound, are expected to benefit from more Chinook salmon later this year, as expressed in a court order calling for the suspension of a major troll fishery in Southeast Alaska. Alaska state officials are dismayed by the ruling, saying that closing this commercial fishery would have a devastating […]