Misty MacDuffee
@Duffling
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Most days I am a conservation biologist with Raincoast that focuses on salmon ecology. Other days are different.
Joined March 2011
RT @Raincoast: Support what you love: Charitable tax receipts for 2024 extended until end of February. Make a donation to @Raincoast until…
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RT @Raincoast: .@Duffling said the 370 conditions the federal government imposed on the port expansion are filled with “soft language,” ver…
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RT @Raincoast: Comment: Life for Southern Resident killer whales not getting better. @Raincoast op-ed re: #SRKW in the @timescolonist today…
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RT @Raincoast: Small-scale marsh creation: Right now, members of @TaraGMartin Conservation Decisions Lab, @Raincoast, and @ducanada, will b…
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RT @Raincoast: We would argue that a fish-trading agreement in an era of biodiversity crisis, a #salmon crisis and a climate crisis is not…
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist @cutpluggin Hence, the problem is not a general lack of Chinook prey, but a lack of *preferred* prey: large, old Chinook. This, combined with noise & disturbance, means successful foraging is reduced and #SRKW must expend more energy to get fewer calories.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist @cutpluggin The removal of immature (but legal sized) Chinook in a marine fishery acts as a selective pressure (a fishery induced evolution) that lowers survival of fish maturing at older ages & bigger sizes, in favour of younger age and smaller size.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist @cutpluggin Unlike most other salmon, Chinook can feed and grow in local waters vs Gulf of Alaska & other North Pacific areas. This makes them vulnerable to being caught in coastal fisheries while they are still growing (& therefore immature.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist @cutpluggin This is significantly below a size where SRKWs purse them. Roughly 80% of Puget Sound hatchery Chinook salmon fall into this category.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist @cutpluggin Agree there are plenty of Chinook, the problem is size & age. #SRKW select for 4yrs old+ & > 74cm. Most Chinook (especially from 🇺🇸hatcheries) are much smaller & younger than 100 yrs ago. In Puget Sound, the ave hatchery Chinook (at maturity) is 62 cm long & <3 yr old
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist There are legacy effects of the aquarium trade that has certainly reduced the reproductive potential of SRKW (ie breeding females), but our analysis shows they can recover if we adequately address prey (fisheries mngment) and noise.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist The removal of immature (but legal sized) Chinook in a marine fishery acts as a selective pressure (a fishery induced evolution) that lowers survival of fish maturing at older ages and bigger sizes, in favour of younger age and smaller size.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist Unlike most other salmon, Chinook can feed and grow in local waters instead of rearing in the Gulf of Alaska and other North Pacific areas. This makes them vulnerable to being caught in coastal fisheries while they are still growing.
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@Raincoast @Marine_Valeria @LanceBarrettLen @timescolonist This is significantly below a size where SRKWs purse them. Roughly 80% of Puget Sound hatchery Chinook salmon fall into this category.
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Agree there are plenty of Chinook, the problem is their size & age. SRKW select for 4yrs + & generally > 74cm. Most Chinook (especially from 🇺🇸hatcheries) are much smaller & younger than 100 yrs ago. In Puget Sound, the ave hatchery Chinook (at maturity) is 62 cm long & <3 yr old
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@Earth42morrow Its not just climate change; its a century of thoughtless & massively unsustainable land use decisions ahead of climate change
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RT @Raincoast: .@Duffling says it’s not solely about declining Chinook, but how those stocks are being harvested. “What if we changed the w…
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What she said @zerowastekait @SkeenaWild
Kait’s here with the latest updates from our Marine Stewardship Council (MSC) objection case, which we have been at for the last few days. @WatershedWatch_ @Raincoast
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