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Type: Journal article
Title: Behavioural patterns and functional responses of a generalist predator revealed using automated video tracking
Author: Feng, Y.
Li, Y.D.
Liu, Z.G.
Yu, X.L.
Zhu, G.X.
Keller, M.
Liu, T.X.
Citation: Pest Management Science, 2019; 75(6):1517-1526
Publisher: Wiley
Issue Date: 2019
ISSN: 1526-498X
Statement of
Yi Feng, Yu-Dan Li, Zhi-Guo Liu, Xing-Lin Yu, Guan-Xiong Zhu, Mike Keller, Tong-Xian Liu
Abstract: BACKGROUND: Tracking predator-prey interactions using automated image recording systems provide insights on novel patterns and mechanisms of predator-prey dynamics; thus, these systems have the potential to evaluate biological control agents 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 efficiency was 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, especially for 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’s 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.
Keywords: automated image tracking; functional response;Harmonia axyridis; predator–prey interactions; generalist predator
Rights: © 2019 Society of Chemical Industry
RMID: 0030106529
DOI: 10.1002/ps.5314
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Appears in Collections:Agriculture, Food and Wine publications

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