The Purple Shore Crab

Paper Summary:

This paper examines how the hemigrapsus nudus, the purple shore crab, is found in the intertidal regions along the Pacific Northwest coastline. In particular, it discusses how they often experience considerable fluctuations in temperature in their natural environments and it is these temperatures which may have an effect on normal physiological function. It proposes a study to test their critical thermal maximum (CTMax) and their critical thermal minimum (CTMin) using their righting response as an indication of their thermal limits.

Outline:
Abstract
Introduction
Materials and Methods
Results
CTMax
CTMin
Discussion

From the Paper:

"Crustaceans and other intertidal species often experience multiple fluctuations in water temperatures as a result of alternating tide patterns and changing seasons (Selvakumar and Geraldine 2004). Hemigrapsus nudus, the purple shore crab, is a common species found in the intertidal zone. These crabs are involuntarily exposed to varying temperatures with the changes in tides and diurnal cycles. H. Nudus can tolerate temperatures up to 33.6 C, known as there critical thermal maximum (CTMax) and temperatures as low as (0 C), known as there critical thermal minimum (CTMin). "

Sample of Sources Used:

• Mcgaw, I. J. 2003 Behavioral Thermoregulation in Hemigrapsus nudus, the amphibious Purple Shore Crab. British Columbia. PubMed. Biol. Bull. 204: 38-49.
• Crawley, J.N. 1999 Behavioral phenotyping of transgenic and knockout mice: experimental design and evaluation of general health, sensory functions, motor abilities, and specific behavioral tests. Brain Research.
• Tripati, A., Elderfield, H. 2005 Deep-Sea Temperatures and Circulation Changes at the Paleocene-Eocene Thermal Maximum. Science. Vol. 308 Is. 5730 1894-1898.
• Voet D., Voet J.G., Pratt C.W. 2006 Fundamentals of Biochemistry: Life at the molecular level.
• Bose, P., Fielding, R., Ameis, K.M., and Vacca-Galloway, L.L. 1998 A novel behavioral method to detect motoneuron disease in Wobbler mice aged three to seven days old. Brain Research.

More papers on The Purple Shore Crab:

• Analytical Essay # 138598 : "The "Purple Hibiscus" and "The Swinging Bridge"
• Book Review # 108869 : "Riders of the Purple Sage"
• Film Review # 70470 : "The Color Purple"

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