Embryonic exposure to predator odour modulates visual lateralization in cuttlefish.

Area of Science:

• Behavioral Ecology
• Neuroscience
• Marine Biology

Background:

• Predation pressure significantly impacts prey behavior and morphology.
• Visual lateralization varies in fish populations based on predation levels.
• While lateralization is common in invertebrates, the role of heredity and early experience is less understood.

Purpose of the Study:

• To investigate the influence of embryonic exposure to predator odor on visual lateralization in cuttlefish.
• To determine if early environmental cues can modulate behavioral development in invertebrates.
• To explore the interaction between ecological challenges during embryonic development and subsequent lateralization.

Main Methods:

• Cuttlefish embryos were exposed to predator odor during incubation.
• Newly hatched cuttlefish were tested for visual lateralization using a T-shaped apparatus.
• Behavioral responses were recorded in the presence of blank seawater and predator odor.

Main Results:

• Cuttlefish exposed to predator odor pre-hatching showed a left-turning bias in blank seawater.
• All cuttlefish groups exhibited a left-turning preference when tested with predator odor, indicating innate recognition.
• This study provides the first evidence that embryonic olfactory exposure affects visual lateralization in cuttlefish.

Conclusions:

• Embryonic exposure to predator odor can modulate visual lateralization in newly hatched cuttlefish.
• Olfactory system stimulation during embryonic development can influence the development of visual lateralization.
• Lateralization in invertebrates is susceptible to ecological challenges experienced during embryonic life.