Intra- and interspecific host discrimination in arrhenotokous and thelytokous Eretmocerus spp.

Ardeh, M.J.; Jong, Peter W. de; Lenteren, J.C. van

doi:10.1016/j.biocontrol.2005.01.006

Cited by 36 publications

(22 citation statements)

References 37 publications

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“…() stated for the first time that high rates of natural horizontal transfer occur between conspecifics in T. kaykai , when Wolbachia ‐infected and ‐uninfected T. kaykai larvae shared the same host and newly infected females thereafter produced daughters from their unfertilized eggs. As they produce only female progeny, the intrinsic rate of population growth is higher, even where the number of progeny per female is lower (Hohmann et al., ; Ardeh et al., ,b; Ramirez‐Romero et al., ). The thelytokous parthenogenesis induced by the infection increases the spread of Wolbachia .…”

Section: Discussionmentioning

confidence: 99%

DoesWolbachiainfection affect decision‐making in a parasitic wasp?

Farahani

Ashouri

Goldansaz

et al. 2015

Entomologia Exp Applicata

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Various physiological effects of Wolbachia infection have been reported in invertebrates, but the impact of this infection on behavior and the consequences of these behavioral modifications on fitness have rarely been studied. Here, we investigate the effect of Wolbachia infection on the estimation of host nutritive resource quality in a parasitoid wasp. We compare decision-making in uninfected and Wolbachia-infected strains of Trichogramma brassicae Bezdenko (Hymenoptera: Trichogrammatidae) on patches containing either fresh or old host eggs. For both strains, fresh eggs were better hosts than older eggs, but the difference was smaller for the infected strain than for the uninfected strain. Oviposition behavior of uninfected wasps followed the predictions of optimal foraging theory. They behaved differently toward high-vs. low-quality hosts, with more hosts visited and more ovipositions, fewer high-quality hosts used for feeding or superparasitism, and a sex ratio that was more biased toward females in patches containing high-quality hosts than in patches containing low-quality ones. Uninfected wasps also displayed shorter acceptance and rejection times in high-quality hosts than in hosts of lower quality. In contrast, infected wasps were less efficient in evaluating the nutritive quality of the host (fresh vs. old eggs) and had a reduced ability to discriminate between unparasitized and parasitized hosts. Furthermore, they needed more energy and therefore engaged in host feeding more often. This study highlights possible decision-making manipulation by Wolbachia, and we discuss its consequences for Wolbachia fitness.

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Section: Discussionmentioning

confidence: 99%

DoesWolbachiainfection affect decision‐making in a parasitic wasp?

Farahani

Ashouri

Goldansaz

et al. 2015

Entomologia Exp Applicata

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“…In several parasitoid species, it was suggested that females may need to learn host discrimination through experience (Takasu & Hirose, 1991;van Baaren & Boivin, 1998;Ardeh et al, 2005). It was also suggested that Trichogramma females cannot discriminate between hosts recently parasitised by conspecifics or by themselves (Vinson & Iwantsch, 1980;van Dijken & Waage, 1987).…”

Section: Infanticide Host Discrimination and Survival Of The Second mentioning

confidence: 99%

Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

Duval

Brodeur

Doyon

et al. 2018

Ecological Entomology

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1.Superparasitism influences the fitness of female parasitoids and their progeny, and increasing time interval between oviposition bouts generally reduces survival probabilities of the second clutch. However, the timing of superparasitism may, under certain conditions, favour the second clutch.2. This study investigated the effects of superparasitism time intervals on survival and fitness of both clutches, allowing the egg parasitoid Trichogramma euproctidis to parasitise previously parasitised Ephestia kuehniella host eggs at different time intervals.3. In short intervals (0-1 h), a significant advantage was found for the second clutch over the first clutch (93.1% survival). In contrast, the second clutch was outcompeted by the first clutch in 17-19 h and 27-29 h intervals. Females deposited their eggs into larvae (intraspecific hyperparasitism) in a 39-41 h interval with a probability of survival of 57.1%. Females mostly refused to hyperparasitise pupae (∼80% rejection at 124-126 h), and when they did, their progeny never survived. 4. Hyperparasitism significantly increased parasitoid mortality in both clutches from less than 20% (superparasitism only) to over 35%.5. Except on newly laid eggs (0-1 h), superparasiting females were frequently observed attempting to stab immatures of all stages (from 36.4% to 89.4% of all ovipositions depending on treatment), but infanticide only appeared to succeed on larvae (39-41 h).6. When the second clutch survived, emerging parasitoids were smaller than control individuals, probably due to resource depletion. 7. These results suggest that T. euproctidis females can detect that a host has been previously parasitised but they cannot perceive superparasitism time intervals.

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“…However, avoidance is not always systematic (Janssen et al 1999) and avoidance mechanisms are often not clearly identified. In parasitoids, interspecific host discrimination has been observed mainly for closely related species that avoid multiparasitism (when the same host is parasitized by different parasitoid species) (Vet et al 1984;van Baaren et al 1994;Pijls et al 1995;Royer et al 1999;Agboka et al 2002;Ardeh et al 2005). This could be the result of the use of the same cues as those used to avoid superparasitism (when the same host is parasitized by different females of the same species), but the mechanisms by which parasitoids recognize competitors are largely unknown.…”

Section: Introductionmentioning

confidence: 99%

New parasitoid-predator associations: female parasitoids do not avoid competition with generalist predators when sharing invasive prey

Chailleux

Wajnberg

Zhou

et al. 2014

Naturwissenschaften

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Optimal habitat selection is essential for species survival in ecosystems, and interspecific competition is a key ecological mechanism for many observed species association patterns. Specialized animal species are commonly affected by resource and interference competition with generalist and/or omnivorous competitors, so avoidance behavior could be expected. We hypothesize that specialist species may exploit broad range cues from such potential resource competitors (i.e., cues possibly common to various generalist and/or omnivorous predators) to avoid costly competition regarding food or reproduction, even in new species associations. We tested this hypothesis by studying short-term interactions between a native larval parasitoid and a native generalist omnivorous predator recently sharing the same invasive host/prey, the leaf miner Tuta absoluta. We observed a strong negative effect of kleptoparasitism (food resource stealing) instead of classical intraguild predation on immature parasitoids. There was no evidence that parasitoid females avoided the omnivorous predator when searching for oviposition sites, although we studied both long- and short-range known detection mechanisms. Therefore, we conclude that broad range cue avoidance may not exist in our biological system, probably because it would lead to too much oviposition site avoidance which would not be an efficient and, thus, beneficial strategy. If confirmed in other parasitoids or specialist predators, our findings may have implications for population dynamics, especially in the current context of increasing invasive species and the resulting creation of many new species associations.

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Intra- and interspecific host discrimination in arrhenotokous and thelytokous Eretmocerus spp.

Cited by 36 publications

References 37 publications

DoesWolbachiainfection affect decision‐making in a parasitic wasp?

DoesWolbachiainfection affect decision‐making in a parasitic wasp?

Impact of superparasitism time intervals on progeny survival and fitness of an egg parasitoid

New parasitoid-predator associations: female parasitoids do not avoid competition with generalist predators when sharing invasive prey

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