Parental crowding influences life-history traits in Locusta migratoria females
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..
| Main Authors: | , , , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | H10 - Ravageurs des plantes, Locusta migratoria, comportement animal, densité de population, femelle, reproduction sexuée, cycle de développement, facteur du milieu, expérimentation en laboratoire, Enquête organismes nuisibles, http://aims.fao.org/aos/agrovoc/c_26554, http://aims.fao.org/aos/agrovoc/c_8811, http://aims.fao.org/aos/agrovoc/c_6112, http://aims.fao.org/aos/agrovoc/c_15969, http://aims.fao.org/aos/agrovoc/c_26876, http://aims.fao.org/aos/agrovoc/c_4317, http://aims.fao.org/aos/agrovoc/c_2594, http://aims.fao.org/aos/agrovoc/c_15989, http://aims.fao.org/aos/agrovoc/c_32767, http://aims.fao.org/aos/agrovoc/c_4510, |
| Online Access: | http://agritrop.cirad.fr/553990/ http://agritrop.cirad.fr/553990/1/document_553990.pdf |
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