Asian Shore Crab and European Green Crab Habitat. Amy Darbyshire | Conor Clifford | Quinn Coughlin | Stephanos Mitrokostas | Augusta Davis. Hemigrapsus sanguineus. Carcinus maenas.
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Amy Darbyshire | Conor Clifford | Quinn Coughlin | Stephanos Mitrokostas | Augusta Davis
Asian Shore Crab (Hemigrapsus sanguineus) on the left and European Green Crab (Carcinus maenas) on the right.
“How do the hydrophysical properties of the Sandwich Town Beach Estuary affect the distribution of Hemigrapsus sanguineus and Carcinus maenas?”
Based off of some prior research -- and consultation with Dr. Pete -- we suspect that the Asian Shore Crab (H. sanguineus) will be more common in the turbulent and cooler outer beach waters rather than in the estuary, whereas the European Green Crab (C. maenas) will likely be found in calmer estuary waters, but not necessarily in warmer ones.
Catching the crabs:
Temperature, Current Speed and Number of Shore Crabs at Sandwich Beach Estuary
The number of crabs that live in a certain area is affected by current speed and water temperature. As our data shows, the faster the current and the colder the water, the less likely crabs will live in an area. It is also apparent that C. Maenas (European Green Crabs) are far more common than H. sanguineus (Asian Shore Crabs). While C. maenas Crabs were more common, H. sanguineus Crabs were found in colder water with faster current speeds than the water where C. maenas Crabs were found though to little data of H. sanguineus Crabs was collected to draw a complete conclusion of the habitat of the H. sanguineus. In conclusion, C. maenas are very common and tend to live in warmer water (around 17 degrees celsius), and with slower current speeds (below 0.45 meters per second).
"Hemigrapsus Sanguineus." Wikipedia. Wikimedia Foundation, 10 June 2013. Web. 15 Oct. 2013.
Bortolus, Alejandro. "Carcinus Maenas | The Exotics Guide." The Exotics Guide. N.p., n.d. Web. 15 Oct. 2013.