FEMALE FEEDING AID IN COMMON EARWIG <i>FORFICULA AURICU‐LARIA</i> L.

Liu, Zhibin; Vancassel, Michel; Quris, René

doi:10.1111/j.1744-7917.1997.tb00074.x

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…In this complex of cryptic species (Wirth et al 1998;González-Miguéns et al 2020) that can be found on almost all continents (Lamb and Wellington 1975;Guillet et al 2000;Quarrell et al 2018;Hill et al 2019), females usually lay their eggs just before or during winter, and then remain with their eggs several weeks or months until they hatch (Lamb 1976;Gingras and Tourneur 2001). During this period, females provide extensive forms of egg care including, for instance, grooming behaviours to remove pathogens, the application of chemical compounds on eggshells to improve resistance against desiccation (Liu et al 1997;Boos et al 2014), and fierce protection against predators (Thesing et al 2015;Van Meyel et al 2019). Moreover, females are frequently observed transporting their eggs from one location to another by holding them individually between their mouthparts (Diehl and Meunier 2018;Meunier et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

Tourneur¹,

Cole²,

Vickruck³

et al. 2022

Peer Community Journal

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Depositing eggs in an area with adequate temperature is often crucial for mothers and their offspring, as the eggs are immobile and therefore cannot avoid exposure to sub-optimal temperatures. However, the importance of temperature on oviposition site selection is less clear when mothers can avoid these potential adverse effects by both moving their eggs after oviposition and providing other forms of egg care. In this study, we addressed this question in the European earwig, an insect in which mothers care for the eggs during several months in winter, frequently moving them during this period. We set up 60 females from two random natural populations (as this species often exhibits population-specific life-history traits and behaviours) under controlled thermal gradients, and recorded the temperature at which they built their nests, tested whether they moved their eggs after an experimental temperature change, and measured the effects on egg development and hatching rate. Our results demonstrate that females indeed select oviposition sites according to temperature, and can move their eggs to reach warmer temperatures. We also show that these warmer temperatures are necessary to ensure egg hatching. Although this set of behavioural thermoregulations is present in the two tested populations, we found a population-specific modality of expression. These included the range of temperatures explored before oviposition, temperature selected at oviposition and dynamics of egg transport following a temperature change. Overall, our study sheds light on a new post-oviposition strategy in female insects that overwinter with their eggs for coping with temperature changes. More generally, it also reveals that egg care and/or egg transport do not prevent behavioural thermoregulation via oviposition site selection and highlights the diversity of behaviours that insects can adopt to enhance their tolerance to global climate change.

show abstract

Section: Introductionmentioning

confidence: 99%

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

Tourneur¹,

Cole²,

Vickruck³

et al. 2022

Peer Community Journal

View full text Add to dashboard Cite

show abstract

“…In this complex of cryptic species (Wirth et al 1998, González-Miguéns et al 2020, females usually lay their eggs just before winter (or during winter), and then remain with their eggs until hatching (Lamb 1976). During this period, females provide extensive forms of egg care including, for instance, grooming behaviours to remove pathogens and applying chemical compounds on eggshells (Liu et al 1997, Boos et al 2014) and fierce protection against predators (Thesing et al 2015, Van Meyel et al 2019.…”

Section: Introductionmentioning

confidence: 99%

“…In this complex of cryptic species (Wirth et al 1998; González-Miguéns et al 2020) that can be found on almost all continents (Lamb and Wellington 1975; Guillet, Josselin, et al 2000; Quarrell et al 2018; Hill et al 2019), females usually lay their eggs just before or during winter, and then remain with their eggs several weeks or months until they hatch (Lamb 1976; Gingras and Tourneur 2001). During this period, females provide extensive forms of egg care including, for instance, grooming behaviours to remove pathogens, the application of chemical compounds on eggshells to improve resistance against desiccation (Liu et al 1997; Boos et al 2014), and fierce protection against predators (Thesing et al 2015; Van Meyel et al 2019). Moreover, females are frequently observed transporting their eggs from one location to another by holding them individually between their mouthparts (Diehl and Meunier 2018; Meunier et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

Tourneur

Cole

Vickruck

et al. 2021

Preprint

View full text Add to dashboard Cite

Depositing eggs in an area with adequate temperature is often crucial for mothers and their offspring, as the eggs are immobile and therefore cannot avoid exposure to sub-optimal temperatures. However, the importance of temperature on oviposition site selection is less clear when mothers have the capability to avoid these potential adverse effects by both moving their eggs after oviposition and providing other forms of egg care. In this study, we addressed this question in the European earwig, an insect in which mothers care for the eggs during several months in winter and often move them during this period. Using 60 females from two Canadian populations (St John’s and Harvey station) set up under controlled thermal gradients, we demonstrated that earwig females both select oviposition sites according to temperature and move their eggs after oviposition to reach warmer environmental temperatures. While this set of behavioural thermoregulation is present in the two studied populations, its modality of expression was population-specific: St John’s females explored greater ranges of temperatures before oviposition, laid their eggs in warmer areas, and moved their eggs quicker toward warm locations. Overall, our study reveals that earwig females have evolved both pre-and post-oviposition behavioural strategies to mitigate the risks inherent to tending eggs during winter. More generally, it also reveals that egg care and egg transport do not prevent behavioural thermoregulation via oviposition site selection and highlights the diversity of behaviours that insects can adopt to enhance their tolerance to global climate change.

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FEMALE FEEDING AID IN COMMON EARWIG FORFICULA AURICU‐LARIA L.

Cited by 2 publications

References 3 publications

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

Pre- and post-oviposition behavioural strategies to protect eggs against extreme winter cold in an insect with maternal care

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