Balancing past and present: how experience influences boldness over time in Eurasian perch

Area of Science:

• Behavioral Ecology
• Animal Behavior
• Predator-Prey Dynamics

Background:

• Prey animals face challenges adapting to changing predation risks.
• Learning from experience allows animals to modify anti-predator strategies.
• How prey utilize past predation experiences over time remains understudied.

Purpose of the Study:

• To investigate how Eurasian perch (Perca fluviatilis) balance past predator experiences with current threat levels.
• To examine the temporal scales of risk assessment in prey animals.
• To understand the plasticity of anti-predator behavior in response to learned and immediate predation cues.

Main Methods:

• Comparing boldness in predator-experienced versus predator-naïve Eurasian perch.
• Assessing anti-predator behavior across different temporal scales.
• Manipulating predator exposure and observing behavioral adjustments in a predator-free environment.

Main Results:

• Predator exposure during early life stages induced lasting changes in risk-taking behavior, persisting for at least 9 months in a predator-free setting.
• Eurasian perch rapidly adjusted their anti-predator responses upon encountering current predation risks, overriding long-term past experiences.
• A trade-off exists between relying on past learned predator risk and responding to immediate environmental threats.

Conclusions:

• Prey animals must dynamically balance learned predator risk from past experiences with current threat assessments.
• The behavioral plasticity of prey allows for rapid adaptation to fluctuating predation environments.
• Understanding this balance is crucial for predicting prey population dynamics and community structure.