A well-studied parasitoid fly of field crickets uses multiple alternative hosts in its introduced range

Broder, E. Dale; Gallagher, James H.; Wikle, Aaron W.; Welsh, Gabrielle T; Zonana, David M.; Firneno, Thomas J.; Tinghitella, Robin M.

doi:10.1007/s10682-022-10225-1

Cited by 5 publications

(6 citation statements)

References 53 publications

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“…Ormia ochracea larvae can develop in a range of natural host cricket species that vary depending on geographic location (Gray et al, 2019(Gray et al, , 2007Sakaguchi and Gray, 2011;Walker, 1993;Walker and Wineriter, 1991). In the laboratory, manual parasitization experiments have established that O. ochracea larvae can successfully develop in other cricket species that are not known to be their natural hosts, but pupation success can be lower than compared to those developing in natural hosts (Adamo et al, 1995a;Broder et al, 2023;Thomson et al, 2012;Wineriter and Walker, 1990). For example, 54 -61% of manually parasitized Gryllus texensis (natural host) resulted in successful larval emergence and pupation, while only 32 -35% (55 used in this study) of manually parasitized Gryllus assimilis resulted in successful larval emergence and pupation (Thomson et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…In Hawaii, where the preferred host cricket Teleogryllus oceanicus continue to evolve in response to selection imposed by O. ochracea, some crickets have lost the ability to produce calling songs (Rayner et al, 2019;Zuk et al, 2006), while others have been rapidly evolving more cryptic calling songs with frequency content that differs from ancestral Teleogryllus oceanicus calling songs (Broder et al, 2022;Gallagher et al, 2022;Tinghitella et al, 2021Tinghitella et al, , 2018. These changes to cricket calling songs may have led to the switching to alternative host species (Broder et al, 2023). At present, it is unknown what allows a field cricket species to be suitable for the development of O. ochracea larvae.…”

Section: Discussionmentioning

confidence: 99%

“…However, cricket grooming behavior can help remove larvae before they burrow into the cricket (Vincent and Bertram, 2010a). While previous work has mainly examined parasitization outcomes in O. ochracea's natural host species (Adamo et al, 1995a;Broder et al, 2023;Cade, 1975;Thomson et al, 2012), few studies have looked at developmental outcomes in the house cricket Acheta domesticus, a cricket species that can be easily obtained from commercial suppliers. The ease of access to large supplies of A. domesticus can allow for the propagation of thriving laboratory colonies of O. ochracea.…”

Section: Introductionmentioning

confidence: 99%

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Resource competition affects the developmental outcome of the acoustic parasitoid flyOrmia ochracea

Dominguez,

Latham,

Mongui

et al. 2024

Preprint

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Ormia ochraceais an acoustic parasitoid fly where the adults are free-living, but their larval young depend on nutritional resources within host crickets for growth and development. In nature, gravid female flies rely on their ability to recognize and localize cricket calling songs to find suitable host species to parasitize. In depth investigations of fly behavior and the mechanistic bases of auditory perception require a reliable approach to propagate stable fly colonies in the laboratory. Previous work has demonstrated that flies can be propagated using a number of natural host cricket species, as well as cricket species that flies do not parasitize in nature. However, we lack a complete understanding of fly developmental outcomes when non-host cricket species are utilized to propagate fly colonies. In this study, we document the feasibility of using commercially suppliedAcheta domesticusas a host species. We specifically test the hypothesis that host size and resource competition can affect developmental outcomes ofO. ochracea. We performed manual parasitizations on crickets that varied in size, and resource competition was varied by manipulating the number of larvae used to parasitize a host cricket. A series of morphometric analyses were conducted on host crickets, and developmental outcomes were measured in terms of pupation success and eclosion success, pupal width, and eclosed adult fly size. In the absence of resource competition, we found that host cricket size did not affect pupation or eclosion success. In the presence of resource competition between two developing larvae within a host cricket, pupation and eclosion successes were impacted negatively, and the developing pupae were more likely to be smaller. These results confirm that resource competition among developing parasitoids can negatively affect developmental outcomes, andAcheta domesticuscan be used effectively to propagate colonies ofO. ochraceain the laboratory.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Resource competition affects the developmental outcome of the acoustic parasitoid flyOrmia ochracea

Dominguez,

Latham,

Mongui

et al. 2024

Preprint

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“…It is known that O. ochracea occurs in parts of Mexico, in the southern USA, and on some Hawaiian Islands [ 48 ]. In each of these regions, O. ochracea are behaviourally specialized to prefer specific host cricket species [ 38 ], and it is clear that some populations of O. ochracea may recognize and use multiple host cricket species [ 37 , 49 , 50 ]. Species-specific differences in cricket songs are largely based on the temporal patterning of sound pulses [ 48 ].…”

Section: Discussionmentioning

confidence: 99%

Parasitoid–host eavesdropping reveals temperature coupling of preferences to communication signals without genetic coupling

et al. 2023

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Receivers of acoustic communication signals evaluate signal features to identify conspecifics. Changes in the ambient temperature can alter these features, rendering species recognition a challenge. To maintain effective communication, temperature coupling—changes in receiver signal preferences that parallel temperature-induced changes in signal parameters—occurs among genetically coupled signallers and receivers. Whether eavesdroppers of communication signals exhibit temperature coupling is unknown. Here, we investigate if the parasitoid fly Ormia ochracea , an eavesdropper of cricket calling songs, exhibits song pulse rate preferences that are temperature coupled. We use a high-speed treadmill system to record walking phonotaxis at three ambient temperatures (21, 25, and 30°C) in response to songs that varied in pulse rates (20 to 90 pulses per second). Total walking distance, peak steering velocity, angular heading, and the phonotaxis performance index varied with song pulse rates and ambient temperature. The peak of phonotaxis performance index preference functions became broader and shifted to higher pulse rate values at higher temperatures. Temperature-related changes in cricket songs between 21 and 30°C did not drastically affect the ability of flies to recognize cricket calling songs. These results confirm that temperature coupling can occur in eavesdroppers that are not genetically coupled with signallers.

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“…It is known that O. ochracea occurs across parts of Mexico, in the southern US, and on some Hawaiian Islands [63]. In each of these regions, O. ochracea are behaviorally specialized to prefer specific host cricket species [48] and it is clear that some populations of O. ochracea may recognize and utilize multiple host cricket species [47,64,65].…”

Section: Discussionmentioning

confidence: 99%

Effects of Ambient Temperature on the Recognition and Preferences for Host Song Pulse-rate by the Acoustic Parasitoid FlyOrmia ochracea

Jirik

Dominguez

Abdulkarim

et al. 2023

Preprint

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Receivers of acoustic communication signals evaluate signal features to correctly identify conspecifics. Environmental variation such as changes in the ambient temperature can alter signal features that may render species recognition a challenge. In field crickets, song temporal features evaluated for species recognition vary with temperature, and the intended receivers of these signals exhibit signal preferences that are temperature-coupled to maintain effective communication. Whether eavesdroppers of communication signals exhibit similar temperature-coupled preferences is unknown. Here, we investigate whether the parasitoid flyOrmia ochracea, an eavesdropper of cricket calling songs, exhibit song pulse rate preferences that are temperature-coupled. We use a high-speed treadmill system to record walking phonotaxis at three ambient temperatures (21, 25, and 30 ℃) in response to songs that varied in pulse rates (20 to 90 pulses per second). Total walking distance, peak steering velocity, angular heading, and the phonotaxis performance index varied with song pulse rates and were affected by ambient temperature. The peak of phonotaxis performance index preference functions became broader and exhibited a high-pass shape, shifting to higher pulse rate values at higher temperatures. Temperature related changes in cricket songs between 21-30 ℃ will not drastically affect the ability of flies to recognize cricket calling songs.

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A well-studied parasitoid fly of field crickets uses multiple alternative hosts in its introduced range

Cited by 5 publications

References 53 publications

Resource competition affects the developmental outcome of the acoustic parasitoid flyOrmia ochracea

Resource competition affects the developmental outcome of the acoustic parasitoid flyOrmia ochracea

Parasitoid–host eavesdropping reveals temperature coupling of preferences to communication signals without genetic coupling

Effects of Ambient Temperature on the Recognition and Preferences for Host Song Pulse-rate by the Acoustic Parasitoid FlyOrmia ochracea

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