Green Crab Monitoring

2018 European Green Crab Season Update

November 1, 2018

The turning of the leaves signals a winding-down of green crab trapping activities. Just as it feels right to us to hunker down and stay warm, cooler water temperatures also cause green crab to become less catchable in the fall and winter. Crab Team monitors have pulled and stored their last traps, and, as of today, all of the data are into Crab Team HQ here in Seattle. While we have provided snapshots and updates ...

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European green crab found in Port Townsend area

September 25, 2018

WSG Crab Team volunteers at Kala Point, near Port Townsend, captured a single European green crab during their final early detection sampling effort for the 2018 season on September 8. In follow up trapping efforts in the area, staff from Washington Department of Fish and Wildlife (WDFW) captured an additional green crab at Scow Bay, a marshy area between Indian and Marrowstone Islands. The two captures add to the list of sites at which green crab have been ...

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Protocol In Focus: Why do we use mackerel as bait?

September 10, 2018

One strength of the Crab Team protocol is that it enables us to confidently compare findings among sites, and track changes over time – even if different people are doing the sampling. With sampling on this scale, even the small steps can be important to what we learn from the data. Protocol in Focus allows us to expand on these details, and offer an opportunity to see all the behind-the-scenes planning that goes into methodology.

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WSG Crab Team Trip to Makah Bay

August 8th, 2018

Last month, Washington Sea Grant Crab Team staff traveled to the Makah Reservation in the northwest corner of the Olympic Peninsula to participate in the Makah Tribe’s European green crab trapping efforts. As you might remember, in October of 2017, we reported the very first sighting of a green crab in Makah Bay. Since then, Adrianne Akmajian, Marine Ecologist for the Makah Tribe, has been leading extensive trapping efforts to better understand and manage the population ...

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Building Capacity to Protect the Salish Sea From European Green Crab

 July 5th, 2018

As we wrote last week, the first half of this monitoring season has seen several new detections of European green crab, but as green crab appear to be ramping up, so is the group of humans ready to control them. WSG Crab Team is now a project with five team members (including two full time staff), more than 200 volunteers, and 25 partner staff from agencies and tribes. That’s a lot of people ...

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Single Green Crab Found During Follow-Up Assessment on Whidbey Island

June 11, 2018

Last week, WSG Crab Team spent three full days in the mud at Lagoon Point on Whidbey Island. After two European green crab were discovered there last year, one during regular volunteer monitoring and a second during the subsequent rapid assessment, Crab Team HQ decided another multi-day trapping assessment could help us better understand the status of green crab at the site. ...

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HEOR or HENU?

May 11, 2018

HEOR or HENU? Crab Team volunteers know it’s one of the most challenging questions we face during sampling. Telling hairy shore crabs (HEOR) apart from purple shore crabs (HENU) can be very tricky, especially when all you have is two tiny molted carapaces. It’s not only shore crabs; several groups of crabs can be tricky to distinguish from each other, even if you know what you are looking for.

As you learn a new set of species, whether it’s birds, ...

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Protocol In Focus: HEOR Parasites

May 10, 2018

One strength of the Crab Team protocol is that it enables us to confidently compare findings among sites, and track changes over time – even if different people are doing the sampling. With sampling on this scale, even the small steps can be important to what we learn from the data. Protocol in Focus allows us to expand on these details, and offer an opportunity to see all the behind-the-scenes planning that goes into methodology.

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Crab Team Highlights from the 2018 Salish Sea Ecosystem Conference – Part 2

April 27, 2018

Yesterday’s blog post covered the highlights from the first green crab special session at the 2018 Salish Sea Ecosystem Conference. Today, we’ll break down the second special session that focused on management of invasive European green crab and provide some reflections on the conference as a whole.

Session 2: “Addressing European Green Crab in the Salish Sea: A Rare Opportunity for International Collaboration Toward Effective Aquatic Invasive Species Control and Prevention”

During the second ...

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Crab Team Highlights from the 2018 Salish Sea Ecosystem Conference – Part 1

April 26, 2018

Between April 4th and 6th hundreds of scientists, managers, and policymakers descended upon the Washington State Convention Center in downtown Seattle for the 2018 Salish Sea Ecosystem Conference. From salmon and orcas to microplastics and harmful algal blooms, presentations at the conference covered an incredibly wide variety of topics — including invasive European green crab. WSG Crab Team collaborated with Washington Department of Fish & Wildlife to host two ...

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Where are the European Green Crab in the Salish Sea Coming From?

April 25, 2018

Finding a few isolated pockets of invasive European green crab in Washington’s Salish Sea over the past two years indicates the early stages of a possible range expansion. Certainly, it is the goal of WSG Crab Team and management to protect shorelines from the damage this crab has done in other parts of the world. In order to do that, it’s important not only to know where green crab are found – and to try to remove them ...

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Documenting the European Green Crab Range Expansion

(Header photo: Allen Pleus, Aquatic Invasive Species Unit Lead for Washington Department of Fish & Wildlife with one of the green crab captured in Padilla Bay during the collaborative assessment trapping effort in 2016.)

February 6, 2018

The very first publication by Crab Team was just released in Management of Biological Invasions this week (you can read it), and while there are six authors listed, it was a contribution made by hundreds. The paper had two ...

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Crab Team Welcomes Program Assistant

Header photo: assisting with the Cape Eleuthera Institute’s green sea turtle research.

  January 17, 2018

Hello, Crab Team community! My name is Kelly Martin and I am thrilled to be joining the Washington Sea Grant Crab Team this year as a program assistant! I am currently a first-year graduate student at the University of Washington School of Marine and Environmental Affairs interested in bridging the gaps between scientists, policy makers, and the general public. ...

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Protocol in Focus: What Happens to My Data?

November 21, 2017

One strength of the Crab Team protocol is that it enables us to confidently compare findings among sites, and track changes over time – even if different people are doing the sampling. With sampling on this scale, even the small steps can be important to what we learn from the data. Protocol in Focus allows us to expand on these details, and offer an opportunity to see all the behind-the-scenes planning that goes into methodology.

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