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Blue Crab Abundance (Spawning-Age Females)

The abundance of spawning-age female blue crabs in the Chesapeake Bay increased to 101 million in 2015, compared to 68.5 million in 2014. This number is above the 70 million overfishing threshold but below the 215 million target abundance.





April 20, 2011

Why are blue crabs important to the Chesapeake Bay? Bruce Vogt from the National Oceanic and Atmospheric Administration (NOAA) explains the iconic crustacean’s economic, ecologic and gastronomic value. Learn more about blue crabs in the Chesapeake Bay Program’s online Field Guide.



April 20, 2011

April 2013: The Chesapeake Bay winter dredge survey is an annual count of the Bay’s blue crab population, and a critical component of blue crab management. The information gathered on abundance, young-of-the-year and spawning stock—those crabs that will mature enough to reproduce during the upcoming year—allows fisheries managers to set commercial and recreational harvest limits for the season ahead.
Closed captions: http://www.youtube.com/watch?v=28mvEE7ydXA

Importance

Perhaps no species is more closely associated with the Chesapeake Bay than the blue crab. Blue crabs support commercial and recreational fisheries across the region, and are one of the Bay’s hardiest species. But poor water quality, habitat loss, harvest pressure and natural predation can affect their continued health. Blue crab population levels inform how harvest regulations should or shouldn’t change if we are to maintain a sustainable blue crab stock.

Goal

The Chesapeake Bay Program has a target abundance of 215 million spawning-age female blue crabs, adopted in 2011.

Additional Information

Based on recommendations from the 2011 Chesapeake Bay Blue Crab Advisory Report, this indicator tracks spawning-age female blue crab abundance and harvest in relation to targets and thresholds for this portion of the population. Previously, the indicator tracked total adult abundance and harvest (males and females) in relation to interim targets and thresholds for that population.

The Chesapeake Bay Stock Assessment Committee (CBSAC), which includes scientists and representatives from the federal government, state governments and academic institutions, is expected to release the 2015 Chesapeake Bay Blue Crab Advisory Report this summer. It will explore the status of the blue crab population and make recommendations to sustain robust crab populations over the long term. It will be based on data collected in the Bay-Wide Blue Crab Winter Dredge Survey (a cooperative effort between Maryland and Virginia) and on annual estimates of blue crab harvest.

Source of Data

NOAA Chesapeake Bay Office

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