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Cοmparative study οf episοdic memοry in cοmmοn cuttlefish (Sepia οfficinalis) and Εurasian jay (Garrulus glandarius)

Abstract : Some authors support that mental time travel is unique to humans. To their point of view, animals are not able to project themselves into the past of the future because they are bound into the present. Nevertheless, during the last 30 years, researchers have brought considerable knowledge on animals’ capacities to travel mentally through time. Even though opinions have evolved, the debate concerning the unicity of mental time travel is still on. My PhD thesis aimed at bringing further knowledge on this matter by focusing on an innovative aspect of episodic cognition in common cuttlefish, Sepia officinalis and Eurasian jay, Garrulus glandarius, namely, source-memory. Source-memory is the capacity to retrieve the origin of an episodic memory. Results showed that cuttlefish were able to perform a source-discrimination study, revealing that they were able to discriminate and retrieve their own perceptions after 3-hours delay. A study on jays’ capacity to encode incidentally a contextual information (contextual source) revealed unexpected differences between males and females. Investigation of future-oriented behaviour in cuttlefish showed that they were able to take a decision in the present according to previous encoded knowledge and according to future experimental conditions. A preliminary study also revealed promising results on cuttlefish capacity to anticipate their future needs. To finish, we explored and revealed for the first time the neuronal substrates of episodic-like memory in cuttlefish. Alltogether, these results provide new knowledge on mental time travel in cuttlefish and in jays, suggesting that this capacity would have evolved under different environmental contraints.
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Submitted on : Tuesday, February 23, 2021 - 3:06:10 PM
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  • HAL Id : tel-03150039, version 2

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Pauline Billard. Cοmparative study οf episοdic memοry in cοmmοn cuttlefish (Sepia οfficinalis) and Εurasian jay (Garrulus glandarius). Animal biology. Normandie Université, 2020. English. ⟨NNT : 2020NORMC227⟩. ⟨tel-03150039v2⟩

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