Life history correlates and reproductive biology of Laelius pedatus (Hymenoptera: Bethylidae) in The Netherlands

Mayhew, Peter J.; Heitmans, W.R.B.

doi:10.14411/eje.2000.048

Cited by 27 publications

(27 citation statements)

References 49 publications

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“…In the larval parasitoid Cotesia glomerata, mated females laid more eggs in a host caterpillar, Pieris rapae crucivora, than did virgin females , although the same numbers of mature eggs were stored in the oviducts of virgin and mated females of the same age (Tagawa, 1987). In the Bethyled wasp Laelius pedatus, virgin females took a longer time than mated females to lay the same numbers of eggs in clutches (Mayhew & Heitmans, 2000). In C. vestalis, differences according to mating status were observed in the whole sequence of host-searching behaviour, including responsiveness to infochemicals mentioned above, and the differences appear to be caused by more complex factors other than egg load.…”

Section: Discussionmentioning

confidence: 99%

Host‐searching responses to herbivory‐associated chemical information and patch use depend on mating status of female solitary parasitoid wasps

Kugimiya

Shimoda

Wajnberg

et al. 2010

Ecological Entomology

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1. In a tritrophic interaction system consisting of plants, herbivores, and their parasitoids, chemicals released from plants after herbivory are known to play important roles for many female parasitoids to find their hosts efficiently. On the plant side, chemical information associated with herbivory can act as an indirect defence by attracting the natural enemies of the host herbivores.2. However, mated and virgin females of haplodiploid parasitoids might not necessarily respond to such chemical cues in the same way. Since virgin females can produce only sons, they might refrain from searching for hosts to invest eggs until copulation, in order to produce both sexes.3. Here, we investigated differential host-searching behaviours shown by mated and virgin females in the solitary parasitoid wasp, Cotesia vestalis, in response to herbivory-associated chemical information from cruciferous plants infested by their host larvae, Plutella xylostella.4. Mated females showed a significantly higher flight preference for host-infested plants over intact plants, while no preference was observed with virgin females. Mated females also showed more intensive antennal searching and ovipositor probing behaviours to leaf squares with wounds caused by hosts than did virgin females. Furthermore, mated females stayed longer in host patches with higher parasitism rates than virgin females. 5. These results indicate that mating status of C. vestalis females clearly influences their host-searching behaviour in response to herbivory-associated chemical information and patch exploitation. Female parasitoids seem to forage for hosts depending on their own physiological condition in a tritrophic system.

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Section: Discussionmentioning

confidence: 99%

Host‐searching responses to herbivory‐associated chemical information and patch use depend on mating status of female solitary parasitoid wasps

Kugimiya

Shimoda

Wajnberg

et al. 2010

Ecological Entomology

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“…Furthermore, I assume that egg mortality will be constant across a range of egg sizes. This may not actually be the case as developmental mortality has been shown to be correlated with egg size in at least one system (Mayhew & Heitmans 2000). However, in this system it was not possible to evaluate developmental mortality.…”

Section: Discussionmentioning

confidence: 99%

“…This occurs when large egg size increases offspring success and when large females lay more eggs in a given resource patch than small females. This last can occur despite large females’ expectation of more oviposition opportunities because of increased lifespan (Ellers & Jervis 2003), because such females will always have more mature eggs at any given time (Blackburn 1991; Mayhew & Heitmans 2000) and thus have a greater tendency to be time, rather than egg‐limited when foraging for oviposition sites (Parker & Begon 1986). However, when offspring of several females compete for limited resources in a scramble, offspring of all females must deal with resource limitation and theory predicts a constant egg size that is independent of female size (Parker & Begon 1986).…”

Section: Introductionmentioning

confidence: 99%

Egg size variation does not affect offspring performance under intraspecific competition in Nasonia vitripennis, a gregarious parasitoid

Lalonde

2005

Journal of Animal Ecology

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Summary 1.As with many insects, egg size variation is correlated with body size in the gregarious parasitoid, Nasonia vitripennis . I use this feature to test the hypothesis that egg size differences among parents affects the ability of their larvae to compete for limited resources within a superparasitized host. 2. I show that egg size asymmetries in parents that oviposit into the same host have no detectable effect on relative offspring performance, even under conditions of resource limitation. 3. Broods within a host that were initiated earlier attained greater average size than competing broods in the same host that were initiated later. 4. Individuals in the more numerous brood emerged consistently larger than individuals in the less numerous brood. 5. The possibility that siblings cooperate in competing for limited resources within a host and the potential role of sibling cooperation on egg size evolution is discussed.

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“…There are recent reports that foraging strategies of unmated females are different from those of mated females in several parasitoid species (Antolin, 1989; Michaud, 1994; Michaud & Mackauer, 1995; Guertin et al ., 1996; Nishimura, 1997; King et al ., 2000; Mayhew & Heitmans, 2000; King, 2002). Female fitness is considered to be more sensitive to body size than male fitness, so mated females of E. fairchildii may commit infanticide more often.…”

Section: Discussionmentioning

confidence: 99%

Adaptive significance of facultative infanticide in the semi‐solitary parasitoid Echthrodelphax fairchildii

Yamada

Ikawa

2003

Ecological Entomology

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Abstract. 1. This is the first work to show how imperfect kin recognition influences the behavioural strategy of parasitoids. 2. The female of Echthrodelphax fairchildii lays an egg on the right or left side of the host thorax. When superparasitising on the side without the first offspring, it often probed the opposite side with its sting and killed the first offspring more than 50% of the time. The frequency of probing increased with increasing inter‐oviposition interval, and was higher in conspecific superparasitism than in self superparasitism. 3. The adaptiveness of probing was assessed by the difference in fitness returns between superparasitism with probing and superparasitism without probing. Fitness returns from self‐superparasitism and those from conspecific superparasitism were assessed by the fitness performance of both first and second comers, and that of second comers respectively. 4. In terms of the survival rate of immatures (one fitness component), probing under conspecific superparasitism guaranteed higher fitness returns than not probing for longer oviposition intervals, but under self‐superparasitism not probing guaranteed higher fitness returns for shorter intervals because superparasitism for such intervals often resulted in two‐adult emergence. 5. In terms of head width (another fitness component), probing produced higher fitness returns for shorter oviposition intervals for both self and conspecific superparasitism. 6. Assuming that offspring quantity contributes more to fitness returns than does offspring quality, the observed frequencies of probing were considered adaptive for parasitoids whose abilities to distinguish between self and conspecifically parasitised hosts and to estimate inter‐oviposition intervals are imperfect.

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Life history correlates and reproductive biology of Laelius pedatus (Hymenoptera: Bethylidae) in The Netherlands

Cited by 27 publications

References 49 publications

Host‐searching responses to herbivory‐associated chemical information and patch use depend on mating status of female solitary parasitoid wasps

Host‐searching responses to herbivory‐associated chemical information and patch use depend on mating status of female solitary parasitoid wasps

Egg size variation does not affect offspring performance under intraspecific competition in Nasonia vitripennis, a gregarious parasitoid

Adaptive significance of facultative infanticide in the semi‐solitary parasitoid Echthrodelphax fairchildii

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