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American Focus > Blog > Tech and Science > Scientists Confirm Crabs Really Can Experience Pain After All : ScienceAlert
Tech and Science

Scientists Confirm Crabs Really Can Experience Pain After All : ScienceAlert

Last updated: December 1, 2024 7:00 pm
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Scientists Confirm Crabs Really Can Experience Pain After All : ScienceAlert
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Crustaceans: More Sensitive Than We Thought

Crustaceans may have a tough exterior, but new research suggests they might be more sensitive than previously believed. Scientists have discovered that shore crabs, specifically Carcinus maenas, can process pain in complex ways, depending on the severity and location of the injury.

This groundbreaking finding raises questions about the ethical treatment of crustaceans, as it indicates they may indeed experience pain. This has implications for how humans interact with these creatures, particularly in practices like boiling or cutting them alive.

According to zoophysiologist Lynne Sneddon from the University of Gothenburg, “We need to find less painful ways to kill shellfish if we are to continue eating them, as now we have scientific evidence that they both experience and react to pain.”

Pain Stimuli Crabs
The places where painful stimuli were tested, including chemical stimuli (red) and mechanical stimuli (black). (Kasiouras et al., Biology, 2024)

Recent debates in the scientific community have focused on the ability of various animals to feel pain. Some experts argue that even creatures like fish, amphibians, and octopuses can respond to noxious stimuli at a cognitive level that suggests they experience pain.

The study on shore crabs earlier this year revealed signs of anxiety in response to certain stimuli, indicating a potential ability to experience pain. However, skeptics argue that these reactions could be mere reflexes rather than conscious experiences.

The recent research on shore crabs used an EEG-like instrument to monitor the activity of their nervous system. By applying different stimuli, researchers were able to observe how the crabs’ central nervous system responded to pain signals.

Shore Crab Diagram
The nervous system of a shore crab. (Kasiouras et al., Biology, 2024)

Results showed that the crabs’ brain activity varied depending on the type and intensity of the stimuli. The higher the level of pain, whether chemical or mechanical, the stronger the response from the central nervous system.

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While further research is needed to fully understand the nuances of this pain response, this study marks a significant step in demonstrating pain-like reactions in crustaceans. The hope is that these findings will guide better practices for animal welfare.

Biologist Eleftherios Kasiouras from the University of Gothenburg emphasizes the importance of recognizing pain systems in all animals for survival. He suggests that other crustaceans, such as shrimps, crayfish, and lobsters, likely share similar nervous system structures that allow them to process painful stimuli.

The study detailing these findings was published in the journal Biology.

TAGGED:confirmCrabsExperiencepainScienceAlertScientists
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