The results of the 2012 Blue Crab Winter Dredge Survey determined the total population of blue crabs in the Chesapeake Bay has reached 764 million, due to four years of a bay-wide stock rebuilding program.
This is a 66 percent increase above the 2011 abundance level of 460 million crabs, and is the highest level recorded since 1993. In fact, the bay-wide blue crab stock abundance is now more than triple the record low of 249 million, set in 2007, the year before the stock rebuilding program began.
“This is fantastic news,” said Governor McDonnell. “The crab population is the highest it has been in the past 20 years, and to see this record production of juveniles is truly remarkable. Those crabs will grow over the summer and many will reach market size in the fall. Those that aren’t harvested and brought to the dinner table will become the building blocks for future generations of crabs.”
The new survey shows this year’s crab abundance increase is the result of a massive bay-wide baby boom – an almost tripling of the number of juvenile crabs from 207 million last year to 587 million. Juvenile crab abundance has never been recorded at such high levels and the new record obliterated the old record of 512 million juveniles established in 1993.
Bay-wide, the crab harvest has increased substantially since 2008, from 43 million pounds to a preliminary estimate of 67.3 million pounds during 2011.
The winter dredge survey results sounded one important cautionary note. The number of spawning age females recorded by the survey dropped by roughly 50 percent from 2011 levels, down to 97 million. However, that level remains above the healthy-species threshold, and these types of fluctuations are neither unprecedented nor unexpected in the winter dredge survey. Spawning age females are the cornerstone of the joint Virginia-Maryland stock rebuilding program. The recorded number of spawning age females is a warning signal that requires a risk-averse, prudent management strategy to avert another stock decline. Crab abundance had declined by 70 percent before the bay-wide stock rebuilding program began four years ago.
Historical crab population data is available here: www.governor.virginia.gov/News/crabtable.cfm