Post by Sach-Crabministrator on Apr 25, 2013 21:44:46 GMT -5
There have been several studies into whether crustaceans can feel pain.
A 2009 study at Queen's University at Belfast[/url] using specifically hermit crabs "showed that hermit crabs make motivational tradeoffs between electric shocks and the quality of the shells they inhabit. In particular, as hermit crabs are shocked more intensely, they become increasingly willing to leave their current shells for new shells, and they spend less time deciding whether to enter those new shells. Moreover, because the researchers did not offer the new shells until after the electrical stimulation had ended, the change in motivational behavior was the result of memory of the noxious event, not an immediate reflex. Similarly, it has been shown that crabs will discard a valuable resource (a preferred shelter) in order to avoid future encounters with painful stimuli, thereby indicating avoidance learning - a key criterion of the ability to experience pain."
This not only shows that they feel pain, but that they are able to quickly learn from it; thus demonstrating their capacity for remembering an experience & being able to learn from it and learn in general really.
Here is an interesting Wikipedia entry about some of the studies that involved different types of decapod crustaceans.
≈19 clypeatus, 4 perlatus & 8 compressus in 4 tanks
It's funny, my crab Herb once got his leg stuck in my sisal climbing wall. I had to cut him loose with nail clippers. I've never had a crab since then get stuck, but he's also NEVER used that wall again. He thinks of that sisal wall as stressful and doesn't want a repeat of that happening again (I think)
kitty: Not much activity in my tank. One morning I got up and it looked like a tornado went through it. Water bowls tumbled, food dishes upside down. Fixed it all up and have been waiting eversince. ! Nothing. DARN !!
Mar 22, 2015 22:44:09 GMT -5
kitty: Just checking in. Monday March 22 10:40 Pm Chicago time.
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Sach-Crabministrator: Answers to the most common questions can be found in our quick links box on the left side of each page!
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