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How to hunt for hiding hosts: the reliability-detectability problem in foraging parasitoids

Vet, L.E.M. and Wäckers, F.L. and Dicke, M. (1991) How to hunt for hiding hosts: the reliability-detectability problem in foraging parasitoids. Netherlands Journal of Zoology, 41, 202-213. ISSN 0028-2960.

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Foraging parasitoids may use stimuli that are derived from their host or from the food of their host, often plants. But how usable are 2nd and 1st trophic level stimuli and what is their relative importance in parasitoid foraging? It is argued that foraging parasitoids are facing a reliability-detectability problem: host-derived stimuli are the most reliable in indicating host presence, accessibility and suitability but they are generally hard to detect. Plant stimuli, on the other hand, are easier to detect but arc generally less reliable indicators. Parasitoids have evolved different non-exclusive strategies to solve this problem. (1) Infochemical detour: parasitoids resort to information from other, more detectable, host stages than the one under attack. (2) Herbivore-induced synomones: parasitoids use specific plant produced volatiles that are released upon damage by a specific herbivore species. In the present paper we put most emphasis on a third strategy (3) Associative learning: through associative learning parasitoids link easy-to-detect stimuli to reliable but hard-to-detect stimuli. Specific mechanisms by which associative learning can improve foraging success are discussed.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:52
Deposited On:14 Mar 2012 01:00
Last Modified:17 Apr 2014 14:04

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