DNR’s Winter Dredge Survey shows blue crab populations are up 46 percent compared to a year ago.
The Chesapeake Bay Blue Crab Winter Dredge Survey, a cooperative effort between the Maryland Department of Natural Resources and the Virginia Institute of Marine Science, estimates a total of 349 million blue crabs in the Chesapeake Bay in 2026, a 46% increase over the estimate of 238 million crabs last year.
The survey also estimated 228 million juvenile blue crabs, an increase of 121% from last year. This above-average abundance is a promising result after what had previously been six consecutive years of below-average juvenile recruitment. The total abundance and juvenile abundance were at the highest levels since 2019.
The number of adult male crabs also increased. There are an estimated 37 million adult male blue crabs in the Bay, which is 43% higher than last year.
However, adult female abundance has decreased by 25%, to 81 million crabs, which is above the management threshold but below the target level. In fisheries management, target numbers represent the desired state of a fishery, while thresholds are lower numbers that can trigger a management response.
The cold winter led to a large amount of overwintering mortality in the Bay’s crabs, especially among adults. About 20% of adult male crabs and 12% of adult female crabs died in the winter, compared to an average of 9% and 7% male and female overwintering mortality from 1996 to 2026. However, blue crabs have rebounded after years of high overwintering mortality, as seen in 2014.
The dredge survey results come as scientists are finalizing the Chesapeake Bay blue crab benchmark stock assessment, a large-scale analysis of the species and factors affecting their population. The draft assessment found that there are more blue crabs than previously estimated in the Bay, but that the crabs face an overall population decrease without a clear cause.
Over the course of the next year, DNR will discuss how to implement the stock assessment results into its management framework, in coordination with the other jurisdictions, watermen, and scientists.
