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The results, published today in the journal  Proceedings of the Royal Society B, provide the first evidence of a link between self-control and intelligence in a non-primate species. To conduct the experiment, common cuttlefish ( Sepia officinalis) in tanks were presented with two foods they commonly eat, each in a separate Perspex chamber. In one chamber was a piece of king prawn, which they could eat immediately. In the other was a live grass shrimp, their preferred food, but they could only have the shrimp if they waited and didn’t eat the prawn. A range of delays were tested, starting at 10 seconds and increasing by 10 seconds each time. All six cuttlefish in the experiment showed self-control, waiting for the grass shrimp and ignoring the king prawn. Those with the most self-control could wait 130 seconds for the grass shrimp to be released – an ability comparable with large-brained animals like chimpanzees.

United kingdomUnited statesRoger hanlonAlexandra schnellRoyal societyCambridge department of psychologyUniversity of cambridge department psychologyMarine biological laboratory in woods holeProceedings of the royal societyProfessor nicola claytonProfessor roger hanlonMarine biological laboratoryWoods holeஒன்றுபட்டது கிஂக்டம்ஒன்றுபட்டது மாநிலங்களில்ரோஜர் ஹன்லான்