Cuttlefish retrieve whether they smelt or saw a previously encountered item

Area of Science:

• Cognitive Neuroscience
• Animal Behavior
• Marine Biology

Background:

• The Source Monitoring Framework posits memory origin is recalled via specific perceptual, sensory, and affective signals.
• Understanding sensory modality memory is crucial for deciphering cognitive processes in non-human animals.

Purpose of the Study:

• To investigate the capacity of cuttlefish (Sepia officinalis) to discriminate between the sensory modalities (visual vs. olfactory) in which an item was previously encountered.
• To determine if cuttlefish can retain and retrieve information about the modality of sensory input over time.

Main Methods:

• Two source discrimination tasks were employed, involving presentation of prey items (crabs, fish, shrimp) via visual and olfactory cues.
• Cuttlefish memory retrieval was tested after delays of 1 and 3 hours, including transfer tests with novel items.
• Performance was assessed based on the accuracy of identifying the original sensory modality of presentation.

Main Results:

• Cuttlefish successfully retrieved the modality of presentation for a crab after 1-hour and 3-hour delays (Experiment 1).
• Following training with multiple items, cuttlefish demonstrated the ability to generalize and discriminate sensory modalities for a novel item (mussel) after a 3-hour delay (Experiment 2).
• This study provides the first evidence of cross-modal sensory discrimination in a marine invertebrate.

Conclusions:

• Cuttlefish possess the ability to remember and differentiate between visual and olfactory sensory experiences, indicating robust source memory.
• These findings suggest cuttlefish can retrieve specific perceptual features associated with past events, supporting the Source Monitoring Framework in invertebrates.
• The results highlight the advanced cognitive capabilities of cephalopods, particularly in sensory memory and discrimination.