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Behavioural patterns and functional responses of a generalist predator revealed using automated video tracking

作者:   来源:   发布日期:2019-06-27  浏览次数:

       论文信息:Yi Feng, Yu-Dan Li, Zhi-Guo Liu, Xing-Lin Yu, Guan-Xiong Zhu,Mike Keller and Tong-Xian Liu*. Behavioural patterns and functional responses of a generalist predator revealed using automated video tracking. Pest Manag Sci 2019; 75: 1517–1526.

       JCR分区Q1,中科院大类一区,IF= 3.225

        论文摘要:BACKGROUND: Tracking predator–prey interactions using automated image recording systems provides insights into novelpatterns and mechanisms of predator–prey dynamics, thus these systems have the potential to evaluate biological controlagents effectively. Using an automated video tracking system, we aimed to quantify the behavioural patterns of a generalist predator Harmonia axyridis in response to changing prey density. The effect of intraspecific interactions on foraging efficiencywas evaluated. In addition, functional response parameters were compared between the observations and model predictions. RESULTS: The associated behavioural component of prey consumption by H.axyridis was modified by prey density, especiallyfor dual predator trials. Both individual and paired H.axyridis exhibited type II functional responses and a consistent cycle of behaviour. Interestingly, intra-specific interference did not affect overall prey consumption. Divergence between estimated and calculated functional response parameters was observed, which might due to the difficulty of separating foraging and non-foraging activity. CONCLUSIONS: Interference interactions between H.axyridis conspecifics might alter their foraging patterns; however, the outcome of prey consumption was not affected by this behaviour. In conclusion, automated video tracking systems may be used to expose the detailed foraging behaviour of predators and could be used to evaluate a wide range of natural enemies.

 

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