Maternal intraguild predation risk affects offspring anti-predator behavior and learning in mites

Area of Science:

• Ecology
• Behavioral Ecology
• Mite Biology

Background:

• Predation risk significantly influences prey evolution.
• Transgenerational effects of maternal stress on offspring behavior are not well understood.
• Intraguild predation (IGP) is a common ecological interaction.

Purpose of the Study:

• To investigate maternal effects of intraguild predation (IGP) risk on offspring anti-predator behavior in the predatory mite Phytoseiulus persimilis.
• To assess if maternal stress impacts offspring learning ability in response to predator cues.
• To understand how experienced predation risk influences behavioral responses in mite offspring.

Main Methods:

• Predatory mite mothers (P. persimilis) were exposed to the presence or absence of an intraguild predator (Amblyseius andersoni) during egg production.
• Offspring (protonymphs) were tested for anti-predator behavior and learning ability in choice situations with and without predator cues.
• Maternal stress levels and offspring behavioral responses, including activity and boldness towards predator cues, were quantified.

Main Results:

• Protonymphs from mothers exposed to IGP risk exhibited reduced activity and bolder responses to predator cues.
• Offspring that experienced larval predation risk and had stressed mothers showed the most attenuated responses to predator cues.
• Behavioral adjustments suggest optimized risk management in response to maternal stress and experienced risk.

Conclusions:

• Maternal experience of intraguild predation risk can induce transgenerational effects on offspring anti-predator behavior.
• Priming offspring behavior may represent an adaptive strategy to optimize risk management and reduce fitness costs.
• This study highlights the importance of maternal stress in shaping offspring behavioral ecology in predator-prey interactions.