State-dependent host acceptance in the parasitoid Copidosoma koehleri: the effect of intervals between host encounters

Kishinevsky, Miriam; Keasar, Tamar

doi:10.1007/s00265-014-1865-x

Cited by 6 publications

(10 citation statements)

References 36 publications

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“…Another explanation is that females avoid superparasitism for a short period of time after ovipositing in a healthy host. As their host acceptance threshold decreases over time, females may super‐ or multiparasitize more readily as the time since their last oviposition increases (Roitberg & Prokopy, ; Ueno & Tanaka, ; Kishinevsky & Keasar, ).…”

Section: Discussionmentioning

confidence: 99%

Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition

Robert

Brodeur

Boivin

2016

Entomologia Exp Applicata

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The behavioral strategies evolved by insect parasitoids to optimize their foraging efforts have been the subject of many theoretical and empirical studies. However, the effects competition may have on these strategies, especially for species that do not engage in antagonistic behaviors, have received little attention. The objective of this study was to evaluate the effects of intraspecific and interspecific competition on patch exploitation strategies by two non‐aggressive species, Trichogramma pintoi Voegelé and Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae), both generalist egg parasitoids. We analyzed the patch residence times of females, their patch‐leaving mechanisms, and the sex allocation of their progeny while foraging either alone, with an intraspecific competitor, or with an interspecific competitor. To some extent, each species responded differently to the presence of a competitor in the patch. Trichogramma pintoi females did not change their patch‐leaving mechanisms in response to competition and behaved as if under an exploitative competition regime, whereas T. minutum females did change their patch‐leaving mechanisms in response to competition and remained longer in the host patch than expected. Antennal rejection, and not oviposition, was the proximate behavioral mechanism underlying patch‐leaving decisions by both species. Neither species adjusted the sex allocation of their progeny in response to competition. These results indicate that the effects of competition differ even among closely related parasitoid species.

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Section: Discussionmentioning

confidence: 99%

Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition

Robert

Brodeur

Boivin

2016

Entomologia Exp Applicata

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“…59 Previous studies have shown that learning host-associated cues during oviposition enables wasps to discriminate and reject parasitised hosts. 45,60,61 This association from short-term memory fades with time without encountering a host. 45,60,61 Memory loss may cause a breakdown in the mechanism of host discrimination, and induce Wolbachia-infected wasps to display a high tendency of superparasitism.…”

Section: Discussionmentioning

confidence: 99%

Wolbachia‐infected Trichogramma dendrolimi is outcompeted by its uninfected counterpart in superparasitism but does not have developmental delay

Zhou

Dan

Liu

et al. 2022

Pest Management Science

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BACKGROUND: Wolbachia infection increases the superparasitism frequency of Trichogramma females and provides an opportunity for horizontal intraspecific transmission. However, superparasitism may lead to interstrain competition between Wolbachia-infected Trichogramma offspring and their uninfected counterparts. This study investigated the outcome of interstrain intrinsic competition between Wolbachia-infected thelytokous strain (W) and uninfected bisexual strain (B) of Trichogramma dendrolimi. To determine the developmental rate of both strains, the sizes of immature stages of T. dendrolimi offspring at different times after parasitisation were measured in single parasitism and superparasitism conditions. RESULTS:The results reflect increased superparasitism by Wolbachia-infected females compared with uninfected females. Trichogramma females did not discriminate between host eggs previously parasitised by either B or W females. When the first oviposition was performed by B females, the B offspring outcompeted W offspring deposited later. Although when W offspring was deposited 8 h earlier than the B offspring, it gained no advantage over B offspring. Regardless of parasitism conditions, differences in the development rate between W and B offspring were not significant. CONCLUSION:The results reconfirmed that W females presented a higher tendency for superparasitism than B females, and showed that B offspring outcompeted W offspring even when the latter was deposited 8 h earlier. The inferiority of Wolbachia-infected Trichogramma compared with their uninfected counterparts is not due to the developmental delay. This study provides insights into the effects of intrinsic competition on the control efficacy of Wolbachia-infected Trichogramma against pests in biological control programs.

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“…Generally, the decision of parasitoid females relies on different cues produced by hosts and conspeci c individuals. The rise in superparasitism of wasps over time is dependent upon the state of the hosts (Kishinevsky and Keasar 2015). Some parasitoids prefer recently parasitized hosts than the hosts that have been parasitized for a longer time because the quality of the parasitized hosts is expected to decline along with the development and consumption of the parasitoid offspring (Kishinevsky and Keasar 2015).…”

Section: Discussionmentioning

confidence: 99%

“…The rise in superparasitism of wasps over time is dependent upon the state of the hosts (Kishinevsky and Keasar 2015). Some parasitoids prefer recently parasitized hosts than the hosts that have been parasitized for a longer time because the quality of the parasitized hosts is expected to decline along with the development and consumption of the parasitoid offspring (Kishinevsky and Keasar 2015). However, in many other wasps, the tendency for superparasitism increases with the increase in time since the previous oviposition.…”

Section: Discussionmentioning

confidence: 99%

Effects of Wolbachia Infection, Parasitic Order, And Time Interval On The Outcome of Inter-Strain Intrinsic Competition Between Bisexual Strain And Wolbachia-Induced Thelytokous Strain of Egg Parasitoid, Trichogramma Dendrolimi

Zhou

Dan

Liu

et al. 2022

Preprint

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Parasitoids may deposit a second clutch of eggs on a host that has been parasitized by the same parasitoid species. This is termed “superparasitism”. Wolbachia infection increases the superparasitism frequency of Trichogramma females. We investigated the outcome and fitness cost of inter-strain intrinsic competition between Wolbachia-infected thelytokous strain (TDW) and uninfected bisexual strain (TDB) of Trichogramma dendrolimi. To determine the developmental rate of both strains, the size of immature stages of T. dendrolimi offspring at different times after parasitization was measured in single parasitism and superparasitism conditions. The results showed increased superparasitism by Wolbachia-infected females compared to uninfected females, regardless of the time interval between oviposition; Trichogramma females were unable to distinguish between host eggs previously parasitized by TDB or TDW females. When the first oviposition was performed by TDB females, the TDB offspring outcompeted TDW offspring deposited later. However, although the TDW offspring was deposited 8 h earlier than the TDB offspring, it gained no advantage over TDB offspring. Regardless of parasitism conditions, the differences in development rate and time between TDW and TDB offspring were not significant. This study revealed that albeit TDW females presented a higher tendency of superparasitism than TDB females, TDB offspring outcompeted TDW offspring even when the latter was deposited 8 h earlier. The negative effects of Wolbachia infection on the competitive ability of TDW offspring inside the host eggs were due to offspring’s low fitness rather than delayed development.

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State-dependent host acceptance in the parasitoid Copidosoma koehleri: the effect of intervals between host encounters

Cited by 6 publications

References 36 publications

Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition

Patch exploitation by non‐aggressive parasitoids under intra‐ and interspecific competition

Wolbachia‐infected Trichogramma dendrolimi is outcompeted by its uninfected counterpart in superparasitism but does not have developmental delay

Effects of Wolbachia Infection, Parasitic Order, And Time Interval On The Outcome of Inter-Strain Intrinsic Competition Between Bisexual Strain And Wolbachia-Induced Thelytokous Strain of Egg Parasitoid, Trichogramma Dendrolimi

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