Evidence for risk-taking behavioural types and potential effects on resource acquisition in a parasitoid wasp

Gomes, Elisa; Desouhant, Emmanuel; Amat, Isabelle

doi:10.1016/j.anbehav.2019.06.002

Cited by 7 publications

(6 citation statements)

References 49 publications

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“…The R values obtained were within the range of R values commonly observed for behavioural traits, although most were lower than the mean R value obtained for animal behaviour (0.35) (Bell et al, 2009). However, personality has rarely been studied in parasitoid insects, and a recent study on the parasitoid wasp Venturia canescens reported a similar R value for activity and a lower R value for exploration (about 0.10, whereas we obtained R values for exploration-related variables of 0.18 and 0.24 (Gomes et al, 2019)).…”

Section: Evidence Of Personality Traits In Trichogramma Evanescenscontrasting

confidence: 73%

“…Animal personality research focuses on inter-individual differences in behaviour that are consistent over time and context (Dingemanse, Kazem, Reale, & Wright, 2009;Denis Réale et al, 2007). Interest in animal personality has increased over the last few decades, and studies have been performed on diverse taxa, including insects (Amat, Desouhant, Gomes, Moreau, & Monceau, 2018;Bell, Hankison, & Laskowski, 2009;Dingemanse et al, 2009;Gosling, 2001;Kralj-fiser & Schuett, 2014;Mazué, Dechaume-Moncharmont, & Godin, 2015;Monceau et al, 2017;Denis Réale et al, 2007;Sih, Bell, & Johnson, 2004;van Ooers & Sinn, 2011) and, more specifically, insects used as BC agents (Gomes, Desouhant, & Amat, 2019;Michalko et al, 2019). Réale et al (2007) described five main categories of personality traits: boldness, exploration, activity, aggressiveness and sociability.…”

Section: Introductionmentioning

confidence: 99%

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Consistent variations in personality traits and their potential for genetic improvement in biocontrol agents: Trichogramma evanescens as a case study

Lartigue

Yalaoui

Belliard

et al. 2022

Evolutionary Applications

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Improvements in the biological control of agricultural pests require improvements in the phenotyping methods used by practitioners to select efficient biological control agent (BCA) populations in industrial rearing or field conditions. Consistent inter-individual variations in behaviour (i.e. animal personality) probably affect BCA efficiency, but have never been taken into account in the development of phenotyping methods, despite having characteristics useful for phenotyping: repeatable (by definition), often heritable, etc. We developed a video-tracking method targeting animal personality traits and evaluated the feasibility of its use for genetic improvement in the BCA Trichogramma evanescens, by phenotyping 1,049 individuals from 24 isogenic lines. We found consistent individual variations in boldness, activity and exploration. Personality differences between the 24 isogenic lines suggested a genetic origin of the variations in activity and exploration (broad-sense heritability estimates of 0.06 to 0.11) and revealed a trade-off between exploration and fecundity.

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Section: Evidence Of Personality Traits In Trichogramma Evanescenscontrasting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Consistent variations in personality traits and their potential for genetic improvement in biocontrol agents: Trichogramma evanescens as a case study

Lartigue

Yalaoui

Belliard

et al. 2022

Evolutionary Applications

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“…Venturia canescens is a diurnal species (Desouhant et al ., 2003), which shows no activity in the dark (E. Desouhant & L. Froissart, personal obs.) but exhibits a positive phototaxis during the day (Lucchetta et al ., 2008; Gomes et al ., 2019).…”

Section: Methodsmentioning

confidence: 99%

Dealing with host and food searching in a diurnal parasitoid: consequences of light at night at intra‐ and trans‐generational levels

Gomes

Rey

Débias

et al. 2021

Insect Conserv Diversity

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1. Light pollution is a widespread phenomenon with major consequences on nocturnal organisms from individual to community. However, its effects on diurnal organisms are still scarcely studied.2. We exposed diurnal parasitoid wasps (Venturia canescens) to low (0.7 lux) or high (20 lux) artificial light for two to eight consecutive nights, and quantified its consequences on their physiology and daytime behaviour compared to a control group (0 lux). We next considered potential trans-generational effects on offspring whose mothers were exposed to light pollution.3. While in the dark night the wasps showed no activity, exposure to artificial light triggered nocturnal activity and altered diurnal behaviours related to foraging. Wasps exposed to light at night had a greater propensity to choose hosts rather than food compared to controls. They also spent more time feeding when exposed to 0.7 lux of light at night. However, these behavioural modifications were not related to changes in individual energy reserves.4. Light pollution effects persisted at trans-generational level: offspring development time and latency before feeding increased when mothers were exposed to 0.7 lux light at night.5. Even at low intensity, light pollution alters foraging behaviour of a diurnal insect. Searching for hosts or food being essential for fitness, light pollution is likely to have long-term repercussions on insect populations.6. Light pollution caused behavioural modifications potentially beneficial for V. canescens in the short term. However, longer term studies (e.g. on lifetime reproductive success) are needed to fully understand its consequences on insects.

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“…For most vertebrate species, willingness to explore and take risks is particularly interesting because these behavioral traits are closely related to resource acquisition and risk of predation [ 10 – 13 ]. Resource availability and predation risk periodically change between day and night, and an individual often accordingly adjusts its exploratory and risk-taking behavior, either independently or correlatedly (behavioral syndromes).…”

Section: Introductionmentioning

confidence: 99%

Light/dark phase influences intra-individual plasticity in maintenance metabolic rate and exploratory behavior independently in the Asiatic toad

Tan¹,

Li²,

Qiao³

et al. 2022

BMC Zool

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Background It is well-known that light/dark phase can affect energy expenditure and behaviors of most organisms; however, its influences on individuality (inter-individual variance) and plasticity (intra-individual variance), as well as their associations remain unclear. To approach this question, we repeatedly measured maintenance metabolic rate (MR), exploratory and risk-taking behaviors across light/dark phase four times using wild-caught female Asiatic toads (Bufo gargarizans), and partitioned their variance components with univariate and bivariate mixed-effects models. Results The group means of maintenance MR and risk-taking behavior increased at night, while the group mean of exploratory behavior remained constant throughout the day. At night, the intra-individual variances were elevated in maintenance MR but reduced in exploration, suggesting that phenotypic plasticity was enhanced in the former but constrained in the latter. In addition, maintenance MR was not coupled with exploratory or risk-taking behaviors in daytime or at night, neither at the inter-individual nor intra-individual levels. Conclusions Our findings suggest that these traits are independently modulated by the light/dark phase, and an allocation energy management model may be applicable in this species. This study sheds new insights into how amphibians adapt nocturnal lifestyle across multiple hierarchy levels via metabolic and behavioral adjustments.

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Evidence for risk-taking behavioural types and potential effects on resource acquisition in a parasitoid wasp

Cited by 7 publications

References 49 publications

Consistent variations in personality traits and their potential for genetic improvement in biocontrol agents: Trichogramma evanescens as a case study

Consistent variations in personality traits and their potential for genetic improvement in biocontrol agents: Trichogramma evanescens as a case study

Dealing with host and food searching in a diurnal parasitoid: consequences of light at night at intra‐ and trans‐generational levels

Light/dark phase influences intra-individual plasticity in maintenance metabolic rate and exploratory behavior independently in the Asiatic toad

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