Intraspecific Competition for Resources by Ormia Depleta (Diptera: Tachinidae) Larvae

Welch, C. H.

doi:10.1653/0015-4040(2006)89[497:icfrbo]2.0.co;2

Cited by 4 publications

(5 citation statements)

References 7 publications

(3 reference statements)

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“…According to the host manipulation hypothesis, we would predict that the larvae would reduce the mate-searching activity of the host. This reduced activity would save energy that could be stored as fat tissue, a food source for the larvae (Adamoet al 1995b), and reduce the risk of predation and superparasitism, both of which would have negative effects on the larvae and the host (Adamo et al 1995a; Allen 1995; Kolluru & Zuk 2001; Welch 2006; Lehmann 2008). However, responsiveness of infested females to male song did not change, rejecting the manipulation hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Parasitoid infestation changes female mating preferences

Beckers

Wagner

2013

Animal Behaviour

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Females often adjust their mating preference to environmental and social conditions. This plasticity of preference can be adaptive for females and can have important consequences for the evolution of male traits. While predation and parasitism are widespread, their effects on female preferences have rarely been investigated. Females of the cricket Gryllus lineaticeps are parasitized by the parasitoid fly Ormia ochracea. Infestation with fly larvae substantially reduces female life span and thus reproductive opportunities of the cricket. Both female G. lineaticeps and flies orient to male song and both prefer male songs with faster chirp rates to songs with slower chirp rates. We tested the effect of parasitic infestation on female responsiveness to male song and female chirp rate preferences. The proportion of individuals responding to male songs did not differ between infested and control females. Control females preferred intermediate chirp rates to slow chirp rates and did not discriminate between fast and intermediate chirp rates. In contrast, infested females showed no preferences in the choice trials, indicating reduced chirp rate selectivity. This plasticity in female preferences may be adaptive; parasitized females may have a higher probability of reproducing before they are killed by the parasitoids if they are less selective (i.e. there will be a larger pool of males considered acceptable). The change in preferences suggests relaxed selection on male chirp rate during times of parasitism.

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Section: Discussionmentioning

confidence: 99%

Parasitoid infestation changes female mating preferences

Beckers

Wagner

2013

Animal Behaviour

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“…According to Welch (2006), reduced size is the easiest observable type of fitness reduction in the tachinid Ormia depleta (Wiedemann, 1830), and can be caused by superparasitism, which is multiple parasitization of a host by the same parasitoid species. Due to competition, insufficient resources are available to allow the flies reared under such conditions to develop, mate, locate hosts, or reproduce properly.…”

Section: Discussionmentioning

confidence: 99%

Intraspecific body size variability in a population of Billaea rhynchophorae (Blanchard) (Diptera: Tachinidae) parasitizing Rhynchophorus palmarum (Linnaeus) (Coleoptera: Curculionidae) in Brazil

Guzzo

Toma²,

Acevedo³

et al. 2023

Egypt J Biol Pest Control

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Background The black palm weevil, Rhynchophorus palmarum (Linnaeus, 1758) (Coleoptera: Curculionidae) is considered the most important palm pest in the Americas. In the State of Bahia, Brazil, it is parasitized by tachinid flies (Diptera: Tachinidae). During 2019–2020, larvae and pupae of R. palmarum were collected from African oil palms (Elaeis guineensis Jacq.) in the municipalities of Jaguaripe and Taperoá, Bahia State, Brazil. Puparia and adult tachinids of two apparent morphospecies, with considerable differences in body size, were obtained from the R. palmarum immatures, which led to initially assume that we had collected two different tachinid species. Results Morphological identification as well as COI gene sequencing showed that the two apparent morphospecies belong to a single taxonomic species, Billaea rhynchophorae (Blanchard, 1937) (Diptera: Tachinidae). Conclusions Occurrence of intraspecific size variability in B. rhynchophorae was reported, as well as performed the first genetic sequencing for this species. The reason of the size variation could not be determined but some possible causes and implications are discussed.

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“…Here, we use data from a natural population of D. rhoeo to address three main questions: (1) does larval competition and host quality drive variation in adult parasitoid body size, (2) what are the energy allocation strategies to different parasitoid body structures (heads, abdomens, thoraces, wings and legs) and how do they vary with parasitoid body size and sex and (3) are there allocation trade-offs among body structures that act as proxies for different life history strategies? To our knowledge, this if the first study that examines larval resource competition in tachinids with an emphasis on energy allocation among different body structures relative to size (resource competition has been shown by others: Allen & Hunt, 2001;Welch, 2006, Lehmann, 2008 and to extend these effects to patterns of life history trade-offs.…”

Section: Introductionmentioning

confidence: 92%

Within-host competition drives energy allocation trade-offs in an insect parasitoid

Wilson

Ruiz

Davidowitz

2020

PeerJ

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Organismal body size is an important biological trait that has broad impacts across scales of biological organization, from cells to ecosystems. Size is also deeply embedded in life history theory, as the size of an individual is one factor that governs the amount of available resources an individual is able to allocate to different structures and systems. A large body of work examining resource allocation across body sizes (allometry) has demonstrated patterns of allocation to different organismal systems and morphologies, and extrapolated rules governing biological structure and organization. However, the full scope of evolutionary and ecological ramifications of these patterns have yet to be realized. Here, we show that density-dependent larval competition in a natural population of insect parasitoids (Drino rhoeo: Tachinidae) results in a wide range of body sizes (largest flies are more than six times larger (by mass) than the smallest flies). We describe strong patterns of trade-offs between different body structures linked to dispersal and reproduction that point to life history strategies that differ between both males and females and individuals of different sizes. By better understanding the mechanisms that generate natural variation in body size and subsequent effects on the evolution of life history strategies, we gain better insight into the evolutionary and ecological impacts of insect parasitoids in tri-trophic systems.

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Intraspecific Competition for Resources by Ormia Depleta (Diptera: Tachinidae) Larvae

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 4 publications

References 7 publications

Parasitoid infestation changes female mating preferences

Parasitoid infestation changes female mating preferences

Intraspecific body size variability in a population of Billaea rhynchophorae (Blanchard) (Diptera: Tachinidae) parasitizing Rhynchophorus palmarum (Linnaeus) (Coleoptera: Curculionidae) in Brazil

Within-host competition drives energy allocation trade-offs in an insect parasitoid

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