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Article Dans Une Revue Bulletin of Entomological Research Année : 2010

Parental crowding influences life-history traits in Locusta migratoria females

Résumé

Parental environments could play an important role in controlling insect outbreaks, provided they influence changes in physiological, developmental or behavioural life-history traits related to fluctuations in population density. However, the potential implication of parental influence in density-related changes in life-history traits remains unclear in many insects that exhibit fluctuating population dynamics, particularly locusts. In this study, we report a laboratory experiment, which enabled us to characterize the life-history trait modifications induced by parental crowding of female individuals from a frequently outbreaking population of Locusta migratoria (Linnaeus) (Orthoptera: Acrididae). We found that a rearing history of crowding led to reduced female oviposition times and increased offspring size but did not affect the developmental time, survival, fecundity, and the sex-ratio and the number of offspring. Because all studied females were raised in a common environment (isolation conditions), these observed reproductive differences are due to trans-generational effects induced by density. We discuss the ecological and evolutionary implications of the observed density-dependent parental effects on the life-history of L. migratoria

Dates et versions

hal-02660245 , version 1 (30-05-2020)

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Marie Pierre Chapuis, Lucie Crespin, Arnaud Estoup, A. Augé-Sabatier, A. Foucart, et al.. Parental crowding influences life-history traits in Locusta migratoria females. Bulletin of Entomological Research, 2010, 100 (1), pp.9-17. ⟨10.1017/S0007485309006853⟩. ⟨hal-02660245⟩
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