FORT MONROE, VA. – Monday, the Virginia Marine Resources Commission (VMRC) released the results from the 2019 Blue Crab Winter Dredge Survey that show the Chesapeake Bay’s blue crab stock remains healthy and able to support quality commercial and recreational harvests.
“Our marine resources are a treasure and the blue crab is an important Virginia species that demands responsible management,” said Governor Ralph S. Northam. “I trust out managers and scientists will utilize the best information possible, along with the input of stakeholders, to ensure the continued success and longevity of this fishery.”
The combined abundance of all sizes of blue crab in the Chesapeake Bay in 2019 was 594 million crabs and ranks 8th among the 30 years the Bay-wide Blue Crab Winter Dredge Survey has been conducted. Successful commercial and recreational harvest within the Chesapeake Bay depends on all sizes of blue crab, at one time or another during the season, and those benefits can be supported by this year’s overall abundant crab stock.
“It’s no surprise that cleaner waters, more seagrass and oyster reef habitat, and responsible catch limits have produced an upward trend in blue crab abundance,” said Virginia Secretary of Natural Resources Matthew J. Strickler. “This shows the kind of direct economic benefits that cleaner water and science-based management have for Virginians, and it is why Governor Northam’s new Chesapeake Bay Blueprint to achieve our clean water goals by 2025 is so important.”
“Although these abundance estimates underscore a stable blue crab resource, we still must exercise caution as we manage this iconic resource,” said Commissioner Steven G. Bowman. “While no reductions appear necessary, we must realize that to adopt overly liberal harvest measures would be irresponsible. I look forward to input from our staff, harvesters, and the public as we craft a balanced plan that ensures continued stability in what has been in the past a somewhat fragile resource.”
A mild winter and above average rainfall has produced higher than normal abundance estimates for all life stages for 2019. The recent survey estimates a total adult male and adult female crab abundance of 271 million. This estimated abundance is 31 percent higher than in 2018 and remains well above the 30-year average of 199 million crabs.
Abundance of female crabs that will spawn in late May or mid-summer of 2019 was estimated as 190 million and that is above the 1990 – 2019 average of 126 million. This 2019 abundance of potential female spawning crabs is 29% higher than in 2018. The abundance of spawning-age female crabs has averaged 163 million during the last 10 years, as compared to the average of 82 million from 1998 – 2007, an era that coincided with a several overfishing events. Since 2008, overfishing has not occurred. The 2019 female spawning stock is the fifth largest since the survey began and remains well above the minimum safe threshold of 70 million crabs.
This year’s survey results also include an increase in the juvenile crab abundance. These crabs measure 2.4 inches or less in carapace width, and their abundance increased by 93 percent from last year to 323 million. These young crabs will grow large enough for harvest by commercial and recreational fisheries late in the summer and represent the major contributor to next year’s reproductive effort. Successful abundance of juvenile blue crabs in our Bay depends on many environmental and biological factors.
The 2018 Bay-wide commercial harvest increased by 2 percent from the previous year to 55.2 million pounds. Harvest has been relatively stable the past four years, and was 50% above the 30-year lows observed in 2013 and 2014. The 2018 Virginia commercial crab harvest was 21.2 million pounds, comparable to the ten-year average (2009 – 2018) of 22.3 million pounds. Virginia commercial crab harvests are moderated by blue crab abundance, as well as marketing and processing constraints.
The December – March Bay-wide Winter Dredge Survey is the primary census of the Bay’s blue crab standing stock. Since the winter of 1989 – 1990, the survey has been conducted by the Virginia Institute of Marine Science and the Maryland Department of Natural Resources. The survey employs crab dredges that sample blue crabs at 1,500 sites throughout the Chesapeake Bay. Sampling during winter, when blue crabs are usually buried in the sediment and stationary, allows scientists to develop, with good precision, estimates of the number of crabs present in the Bay.
The Chesapeake Bay Stock Assessment Committee, a subcommittee of the Sustainable Fisheries Goal Implementation Team, is reviewing the recent survey results and will release its full analysis in its 2019 Blue Crab Advisory Report this summer. The annual advisory report is used by managers as they review and update fishery regulations. The Bay jurisdictions continue to cooperatively manage the Bay-wide blue crab stock.
The VMRC will begin discussions with the Commission’s Crab Management Advisory Committee to provide guidance to the Commission concerning the course of action for 2019 that promotes the health of the blue crab stock and its fisheries. The Commission will be briefed on these survey results at its May 28 meeting.