Energy allocation during the maturation of adults in a long-lived insect: Implications for dispersal and reproduction

David Guillaume, Giffard Brice, Van Halder Inge, Piou Dominique, Jactel Hervé. 2015. Energy allocation during the maturation of adults in a long-lived insect: Implications for dispersal and reproduction. Bulletin of Entomological Research, 105 (05) : 629-636.

Quartile : Q1, Sujet : ENTOMOLOGY

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Energy allocation strategies have been widely documented in insects and were formalized in the context of the reproduction process by the terms 'capital breeder' and 'income breeder'. We propose here the extension of this framework to dispersal ability, with the concepts of 'capital disperser' and 'income disperser', and explore the trade-off in resource allocation between dispersal and reproduction. We hypothesized that flight capacity was sex-dependent, due to a trade-off in energy allocation between dispersal and egg production in females. We used Monochamus galloprovincialis as model organism, a long-lived beetle which is the European vector of the pine wood nematode. We estimated the flight capacity with a flight mill and used the number of mature eggs as a proxy for the investment in reproduction. We used the ratio between dry weights of the thorax and the abdomen to investigate the trade-off. The probability of flying increased with the adult weight at emergence, but was not dependent on insect age or sex. Flight distance increased with age in individuals but did not differ between sexes. It was also positively associated with energy allocation to thorax reserves, which increased with age. In females, the abdomen weight and the number of eggs also increase with age with no negative effect on flight capacity, indicating a lack of trade-off. This long-lived beetle has a complex strategy of energy allocation, being a 'capital disperser' in terms of flight ability, an 'income disperser' in terms of flight performance and an 'income breeder' in terms of egg production.

Classification Agris : L52 - Physiologie animale - Croissance et développement
L50 - Physiologie et biochimie animales
L53 - Physiologie animale - Reproduction

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Agences de financement européennes : European Commission

Programme de financement européen : FP7

Projets sur financement : (EU) Development of improved methods for detection, control and eradication of pine wood nematode in support of EU Plant Health policy

Auteurs et affiliations

• David Guillaume, INRA (FRA) ORCID: 0000-0002-2692-0409 - auteur correspondant
• Giffard Brice, INRA (FRA)
• Van Halder Inge, INRA (FRA)
• Piou Dominique, INRA (FRA)
• Jactel Hervé, INRA (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/590921/)

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