How Moon and Sun Cycles Work Together to Influence Oyster Activity Patterns

Continuous monitoring of valve movements in 16 oysters over 1 year reveals strong ties between their behavior and environmental cycles.

• Valve behavior in C. gigas is primarily driven by the tidal cycle.
• The strength of tidal influence is affected by neap-spring tides, which are related to the moon's distance from Earth.
• Light exposure influences the oysters' biological rhythm, but its impact is secondary to tidal forces.
• Biological rhythms of bivalves may vary globally based on the importance of solar and lunar cycles in their specific environments.
• The study indicates a high adaptability of these oysters to environmental changes.

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