@article {47908,
	title = {Behavioural specialization among populations of the acoustically orienting parasitoid fly Ormia ochracea utilizing different cricket species as hosts},
	journal = {Animal Behaviour},
	volume = {73},
	year = {2007},
	month = {Jan-01-2007},
	pages = {99 - 104},
	abstract = {<p>Tightly coupled evolutionary associations between parasites and their hosts are well known. What is less well characterized is the behavioural specialization of parasites that exploit different hosts in different parts of the parasite\&rsquo;s geographical range. Here we examine behavioural specialization among populations of a parasitoid fly, Ormia ochracea, that exploit different host species of crickets in different parts of the fly\&rsquo;s range. We conducted a field experiment to compare phonotactic attraction of flies from Florida, Texas, California and Hawaii (U.S.A.) to the songs of their local host species of cricket versus their attraction to the songs of species of crickets utilized as hosts elsewhere within the flies\&rsquo; range. We found strong behavioural specialization of fly populations, with preferential phonotaxis towards the song of the local host species of cricket. These results suggest strong behavioural specialization of flies, but that specialization does not constrain or preclude the rapid adoption of novel hosts.</p>
},
	keywords = {acoustic communication, behavioural specialization, diptera-orthoptera coevolution, eavesdropping, host selection, Ormia ochracea, parasitoid fly},
	issn = {00033472},
	doi = {10.1016/j.anbehav.2006.07.005},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347206003939},
	author = {Gray, David A. and Banuelos, Christina and Sean E. Walker and William H. Cade and Zuk, Marlene}
}
@article {47781,
	title = {Host song selection by an acoustically orienting parasitoid fly exploiting a multispecies assemblage of cricket hosts},
	journal = {Animal Behaviour},
	volume = {81},
	year = {2011},
	month = {Jan-04-2011},
	pages = {851 - 858},
	abstract = {<p>Specialization by predators, parasites and parasitoids is often viewed as adaptive because specialization will usually increase search efficiency for suitable hosts (prey). Although many studies have documented interspecific variation in the degree of host specialization, few studies have examined intraspecific variation in specialization among different populations exploiting different numbers of hosts, and even fewer have specifically examined variation in behavioural specialization. Here we examine the acoustic preferences of a parasitoid fly, Ormia ochracea, which attacks several Gryllus species of field crickets by using the male cricket song to locate hosts. All previous studies with this system have examined fly song preferences in populations of flies that primarily exploit a single host species of cricket. Here we tested a population of flies that naturally parasitizes multiple cricket species. We found significant interspecific host song preferences; however, as predicted, the strength of preference was reduced compared to single-host populations of flies. We also examined fly song selection for intraspecific variants of two of the cricket host species; flies showed significant preference for intraspecific song variants of one of the two cricket species. Our results demonstrate that the degree of behavioural specialization, in a very highly specialized fly, nevertheless shows interpopulation variation consistent with the numbers of host species utilized.</p>
},
	keywords = {Gryllus, Ormia ochracea, parasitoid, specialization, variation},
	issn = {00033472},
	doi = {10.1016/j.anbehav.2011.01.024},
	url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347211000273},
	author = {Sakaguchi, Kelly M. and Gray, David A.}
}
