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Crabs A Red Kayak Project. By Griff Lehnert With tech assistance from Jordan Lehnert who is proud of the background pictures!. The Animal. Callinectes (“beautiful swimmer”) sapidus (“savory”) Gray-Blue in color. Claws are blue. Female claws are tipped with red.

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crabs a red kayak project

CrabsA Red Kayak Project

By Griff Lehnert

With tech assistance from Jordan Lehnert who is proud of the background pictures!

the animal
The Animal
  • Callinectes (“beautiful swimmer”) sapidus (“savory”)
  • Gray-Blue in color. Claws are blue. Female claws are tipped with red.
  • Males have a “T”shaped abdomen, known as the apron. Females have a triangle shaped apron.
  • Grow by molting their old shell and growing a new one.
slide5
Diet
  • Adult Crabs feed on crustaceans, fish, worms and nearly anything they can find.
  • The blue crab’s favorite food is a thin shelled bivalve mollusk.
  • Adult crabs will often resort to cannibalism of juvenile crabs.
crabbing economy
Crabbing Economy
  • For the past 60 years, blue crabs have been the main catch for Chesapeake Bay fisheries.
  • Crabs are the most valuable catch for fisheries. The blue crab harvest for 2000 is estimated at $55 million.
  • Approximately one-third of the nation’s blue crabs are caught in the Chesapeake.
crabbing regulations
Crabbing Regulations
  • Harvesting Females is Prohibited
  • Season: April 1- December 15
  • Minimum Size
equipment required by regulations
Equipment: required by regulations
  • Crab traps or pots
  • Dipnets
  • Trotting Lines
catch limits
Catch Limits
  • In an effort to bring back the blue crab, the Departments of Natural Resources of MD and VA limits the catch of commercial and noncommercial fishermen, depending on licensed crabbers on board.
  • For more information, see the Maryland DNR website at http://www.dnr.state.md.us/fisheries/regulations
environmental issues
Environmental Issues
  • Due to over-fishing, pollution and destruction of habitat, the blue crab population i the Chesapeake Bay is rapidly decreasing.
  • The increase in population of predatory fish such as the striped bass and Atlantic croaker who prey on juvenile crabs
effect of bay damage and over fishing crabs
Effect of Bay Damage and Over-fishing Crabs
  • Blue crab populations have fallen nearly 70% since 1990.
  • In 1990, there were an estimated 791 million crabs in the Chesapeake. By 2000, the estimate was down to 281 million.
  • By 2009, thanks to restrictions in harvesting, the blue crab population was 393 million.
bibliography information
Bibliography: Information
  • http://www.dnr.state.md.us/fisheries/regulations
  • http://www.bluecrab.info/
  • http://www.chesapeakebay.net/blue_crab.htm
  • http://web.vims.edu/adv/ed/crab/?svr=www
  • http://www.aqua.org/animals_bluecrab.html
bibliography pictures
Bibliography:Pictures
  • http://www.fishingnj.org/procrab.htm
  • http://www.sms.si.edu/irlfieldguide/CrabBiol.htm
  • http://www.serc.si.edu/education/resources/bluecrab/lifecycle.aspx
  • http://beauforttribune.com/archives/8737
  • http://funbeach.com/activities/crabbing/
  • http://www.marshbunny.com/stjohns/trotline/trotline.html
  • http://www.crabbingtips.com/
  • http://www.paulmcgeheeart.com/pages/ChesapeakeBayCrabBoat.htm
  • http://www.fegi.ru/prim/sea/mol_dvu.htm
  • fishingnj.org
  • http://asm.news21.com/bundle/chesapeake/budget/31/
  • http://alansmoneyblog.com/2010/03/10/the-most-prosperous-nations-on-earth/
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