Studies focus on acidic ocean impact on Dungeness crabs – Vancouver Sun

More research to understand how our addiction to fossil fuels is affecting our food sources.

Millions of pounds of Dungeness crab are pulled from Pacific Northwest waters each year in a more than century-old ritual for commercial and recreational fishermen. But as ocean waters absorb more carbon dioxide in the atmosphere, U.S. scientists are worried that the ocean’s changing chemistry may threaten the sweet-flavoured crustaceans. Scientists with the National Oceanic and Atmospheric Administration are exposing tiny crab larvae to acidic seawater in laboratory experiments to understand how ocean acidification might affect one of the West Coast’s most lucrative fisheries. Research published this year found that Dungeness crab eggs and larvae collected from Puget Sound and exposed to higher levels of carbon dioxide — which increases ocean acidity — grew more slowly and larvae were more likely to die than those in less corrosive seawater. Now researchers at NOAA’s Fisheries’ Northwest Fisheries Science Center are taking the experiments a step further to study how the crabs respond to multiple stressors during various growth stages. They also plan to analyze the sublethal effects: Even if the crabs don’t die are they affected in physiological or other ways by ocean acidification? (Associated Press)

Studies focus on acidic ocean impact on Dungeness crabs

An undammed Elwha River building beaches again: Crab found where it once was too rocky – PDN

Good news for the Elwha restoration…

During a recent survey of sediment that flowed down the Elwha River and accrued along a beach to the east of the river mouth, Ian Miller found something he had not yet seen during his surveys. Miller, a coastal hazards specialist with Washington Sea Grant, came across a Dungeness crab that had tucked itself into fine-grain sand onto the lowest portion of a beach east of the river mouth, just north of where Sampson Road on the Lower Elwha Klallam reservation ends. Jeremy Schwartz reports.

http://peninsuladailynews.com/article/20131014/NEWS/310149994/an-undammed-elwha-river-building-beaches-again-crab-found-where-it

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