MARYLAND BLUE CRABS By: Burk Hill. DETAILS ABOUT CRABS Crabs serve as predator and prey in the...
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Transcript of MARYLAND BLUE CRABS By: Burk Hill. DETAILS ABOUT CRABS Crabs serve as predator and prey in the...
MARYLAND BLUE CRABSBy: Burk Hill
DETAILS ABOUT CRABS
• Crabs serve as predator and prey in the Chesapeake bay ecosystem
• Can grow up to 9.1 inches• Crabs are keystone creature in
Chesapeake Bay food web• 418 million crabs were estimated to
be living in the Chesapeake Bay in 2009
• In 2009 there was a 70% increase in male crabs since 2008
• The juvenile (less than 1 year old) crab population was below the historical average of 259 million
THE ECONOMY CRABS CREATE
One third of the nation’s blue crabs come from the Chesapeake Bay
For the past 60 years, blue crabs
have dominated the Chesapeake
Bay’s commercial fisheries
In 2000, the crab harvest was
valued at approx. $55 million
REGULATIONS
Minimum size for a soft shell crab is 3 ½ inch Minimum size for a peeler is 3 ¼ inch April first to July
14th from July 15th to December 15th is 3 ½ inch Season for hard shell blue crabs is April 1st to December
15th with a minimum size 5 inches April first to July 14th
ENVIRONMENTAL ISSUES AFFECTING THE INDUSTRY
Some years, with crab pots, female crabs are being too heavily crabbed that they can not reproduce enough crabs for the next years
With pollution a big factor in the Chesapeake bay it is hard for any species to maintain a large population with it being heavily harvested annually
After reaching a juvenile stage the crabs start to look for a place to live, so they try to find grass or S.A.V.s (submerged aquatic vegetation) to hid until grown up