West Coast Dungeness Crab Stable or Increasing Even With Intensive Harvest, Research Shows


Despite worrying signs of ocean change impacting Dungeness crab, the West Coast’s prolific coastwide crab fishery just keeps on giving—and lately, even increasing. Credit sound fishery management, but don’t doze off.

– Brad Warren, Executive Director of NFCC

March 4th, 2020 NOAA Fisheries

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The West Coast Dungeness crab fishery doesn’t just support the most valuable annual harvest of seafood on the West Coast. It’s a fishery that just keeps on giving.

Fishermen from California to Washington caught almost all the available legal-size male Dungeness crab each year in the last few decades. However, the crab population has either remained stable or continued to increase, according to the first thorough population estimate of the West Coast Dungeness stocks.

“The catches and abundance in Central California especially are increasing, which is pretty remarkable to see year after year,” said Kate Richerson, a research scientist at NOAA Fisheries’ Northwest Fisheries Science Center in Seattle. Richerson is the lead author of the new study published in the journal Fisheries Research. “There’s reason to be optimistic that this fishery will continue to be one of the most productive and on the West Coast.”

Other recent research has suggested that the West Coast’s signature shellfish could suffer in the future from ocean acidification and other effects related to climate change. That remains a concern, Richerson said, but the study did not detect obvious signs of population-level impacts yet.

Fishing Regulation Success

The secret to the success of the Dungeness crab fishery may be the way fishing regulations protect the crab populations’ reproductive potential. Male Dungeness crabs mature and begin reproducing one to two years before they can be caught, so crabs can reproduce even with heavy fishing pressure. Female Dungeness crab can store sperm for more than a year, allowing them to reproduce even in the absence of numerous males. Fishermen must also return females to the water, further protecting the reproductive capacity of the population.

“The management system that is used for Dungeness crab seems to be a perfect fit for their life history because it allows the population to reproduce and grow even with the intensive harvest,” Richerson said.

Natural Variability

Crab numbers and reproduction rates do vary from year to year, mostly because of ocean conditions. That also may have contributed to the increasing numbers in Central California. They have risen over the last two decades and now average nearly five times abundance estimates from 1970 to 2000.

Central California crab numbers have increased enough that they are now closer to the size of populations in Northern California, coastal Washington, and Oregon. Those populations do not show the same growth trends as those in Central California, but remain stable overall.

However, a previous increase in the Central California landings from the 1930s to the late 1950s was followed by a dramatic crash about 1960. Catches remained low until the 1980s and then rebounded. Researchers believe those fluctuations likely reflected changing ocean conditions, and could happen again.

“If this is true, the recent increase in Central California crab abundance may be reversed when the system again shifts to a period of later spring transitions,” the scientists wrote. “This is likely to have a large impact on the fishery, as well as other interlinked fisheries in the area.”

https://www.fisheries.noaa.gov/feature-story/west-coast-dungeness-crab-stable-or-increasing-even-intensive-harvest-research-shows

Fishing Industry Businesses Endorse I-1631

FOR IMMEDIATE GENERAL RELEASE:

October 23, 2018

To whom it may concern:

Erling Skaar with his Bering Sea crab vessel the F/V North American. It’s outfitted with his GenTech system, allowing it to operate with far lower emissions and fuel costs than similar vessels.

We write today to announce our support for Washington’s Initiative 1631. As businesses who rely on healthy fisheries for a significant portion of our income, we believe this is a well-designed policy that offers us – and our customers – the best possible chance against an uncertain future fraught with the threats of changing ocean conditions.

It’s become clear that our fisheries need a lifeline. Here in Washington, we are experiencing the worst ocean acidification anywhere in the world. Research has firmly established the cause of this problem: emissions from burning coal, oil and gas mix into the ocean, altering its chemistry. The consequences loomed into headlines a decade ago when the oyster industry lost millions and nearly went out of business during the oyster seed crisis. Temporary and limited adaptation measures in hatcheries are keeping them in business, but in the rest of the oceans, fisheries that put dinner on billions of tables are at risk. Here in the Northwest, harvests are already being eroded and even shut down by the effects of unchecked carbon emissions.

The “warm blob,” an unprecedented marine heatwave off the West Coast, reached its height in 2015 and caused mass fatalities. In the Columbia River, a quarter million salmon died. The largest recorded toxic algae bloom shut down the Dungeness crab fishery for months. The food web crashed, and marine creatures were spotted farther north than ever before. Sea surface temperatures never returned to their previous norm, and new research indicates another blob is forming.

Summers have become synonymous with a smoky haze from wildfires causing poor visibility and poor health – this summer the National Weather Service warned even healthy adults in some Washington areas to stay indoors due to hazardous air quality. At the same time, our iconic Orca whales are starving from a lack of Chinook salmon. The Chinook in turn are suffering from a lack of the zooplankton that juveniles eat.

Research has made it clear that some of our most lucrative fisheries are vulnerable to ocean acidification: king crab, Dungeness crab, and salmon. Scientists also warm that combining stressors – like warming with ocean acidification – makes survival in the ocean all the more precarious.

We studied to understand how to protect our businesses and the natural resources we rely on. The answer was clear: reduce carbon emissions. Reduce them now, and reduce them as quickly as possible.

This is where I-1631 comes in. This fee on carbon, which starts at $15/ton and rises by $2/year, will raise around a billion dollars a year. That revenue will be spent on clean energy projects, energy efficiency, and climate resiliency. Fisheries and ocean acidification projects are specifically included as priority investments.

Maritime fuels will be exempt, so struggling fishing vessel operators won’t pay any additional cost for their fuel. However, they will still qualify for energy efficiency funding. Many of our businesses offer technologies that greatly increase efficiency: sometimes by more than 50%. But over and over, we hear from our customers that despite the obvious advantages and quick return on investment, they simply don’t have the capital to invest in energy efficiency. A billion dollars a year, every year, would provide unprecedented access to that sorely needed capital. Businesses and fleets of vessels or trucks would reap the savings in energy costs, and our environment would reap the benefits of lowered carbon emissions. It’s an obvious win-win.

The fee will likely add about $.14/gallon to the cost of diesel for road transportation, and other energy costs will rise a bit too. But the additional cost could be eliminated by just a 5% increase in efficiency in year one; even in year ten, a 14% increase in efficiency would more than pay the fee. Such efficiency gains are easily achievable with existing technology. Fleets of vessels could be outfitted with more efficient engines or generators, processing facilities could receive grants for more energy efficient refrigeration systems or boilers.

The initiative will also fund work to prevent and mitigate wildfires, flooding, and other extreme weather events, and research to understand the threats to fisheries and investigate mitigation methods.

And the truth is, we’re already paying much more for climate change than I-1631’s fee will cost. We don’t just pay in harvest closures, reduced catches, and lost jobs. We get stuck with an out-of-control tab for the impacts of carbon pollution through our taxes and insurance bills.  Since 1980, the US economy has already endured climate disaster costs of more than $1.5 trillion, according to NOAA. That works out to nearly $10,000 for each individual taxpayer. And those costs are rising. In 2017, NOAA reckons that extreme weather disasters rang up a $306 billion bill in the US. That’s another $2,000 a year on each of us who do the work and pay the bills around here.

In Washington alone, the $1 billion in wildfire response cost since 2014 adds up to a cost of $371 per household. Enough already. I-1631 will combat these threats. Washington will join a global network of price-and-invest policies with a proven track record of improving economies, creating jobs, decreasing health costs, and dramatically reducing emissions. The initiative protects critical Washington industries that can’t afford an added fee, and ensures that low-income households bear no additional burden. It gives tribes and rural communities their due, and because it’s a fee rather than a tax, the funds can never be diverted for other uses: not for the general fund, not for pet projects. The revenue can only be used for emissions reductions and climate resiliency.

Along with a diverse coalition including labor, tribes, physicians, and environment and science experts, I-1631 is also supported by major Washington businesses. Vigor, Microsoft, Expedia, Virginia Mason, MacDonald Miller, and REI are just a handful of the biggest endorsers. We proudly add our names to theirs, and ask other businesses to join us.

For more information contact the Working Group on Seafood and Energy at info@globaloceanhealth.org.

Sincerely,

Erling Skaar
F/V North American and GenTech Global

Pete Knutson
Loki Fish Co

Matt Marinkovich
Matt’s Fresh Fish

Amy Grondin
Duna Fisheries

Greg Friedrichs
F/V Arminta

Mike Cassinelli
Beacon Charters

Lars Matthiesen
Highland Refrigeration

Bob Allen
MER Equipment

Larry Soriano
Alaska Ship Supply

Robert Loe
Robert Loe & Associates