Read by QxMD icon Read

Temperature and Salinity Effects on Shell Selection by the Hermit Crab Pagurus longicarpus

Sarah Gilliand, Jan A Pechenik
Biological Bulletin 2018, 235 (3): 178-184
The widespread coastal hermit crab Pagurus longicarpus relies on empty gastropod shells for shelter. At low tide, these hermit crabs often become stranded in tide pools, where changes in temperature and salinity can occur rapidly. We tested how changes in temperature and salinity affected the sizes of the shells chosen by hermit crabs. Increasing the seawater temperature from 22 °C to 32 °C had a significant effect ( <mml:math xmlns:mml=""&gt; <mml:mrow> <mml:mi>P</mml:mi> <mml:mo><</mml:mo> <mml:mn>0.05</mml:mn> </mml:mrow> </mml:math> ) on the size of shells chosen, as did lowering the temperature to 16 °C. Reducing the salinity from 30 ppt to 20 ppt or raising it to 40 ppt did not affect shell choice significantly, but lowering the salinity from 30 ppt to 15 ppt did. This study builds on previous studies of shell size preference of hermit crabs by highlighting the importance of taking temperature and salinity into account when assigning shells of appropriate size in laboratory studies. These results also suggest that climate change may alter the sizes of shells that hermit crabs of the species P. longicarpus will seek in the field. Additional studies will be required to evaluate the potential impacts of such shifts on hermit crab survival and reproduction.


You need to log in or sign up for an account to be able to comment.

No comments yet, be the first to post one!

Related Papers

Available on the App Store

Available on the Play Store
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"