Density-dependent mating behaviors reduce male mating harassment in locusts

Maeno Koutaro Ould, Piou Cyril, Ould Ely Sidi, Ould Mohamed Sid' Ahmed, Jaavar Mohamed el Hacen, Ghaout Saïd, Babah Ebbe Mohamed Abdallahi Ould. 2021. Density-dependent mating behaviors reduce male mating harassment in locusts. Proceedings of the National Academy of Sciences of the United States of America, 118 (42):e2104673118, 10 p.

https://doi.org/10.1073/pnas.2104673118

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Url - jeu de données - Entrepôt autre : https://doi.org/10.6084/m9.figshare.16640113

Quartile : Outlier, Sujet : MULTIDISCIPLINARY SCIENCES

Liste HCERES des revues (en SHS) : oui

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

Résumé : Male mating harassment may occur when females and males do not have the same mating objectives. Communal animals need to manage the costs of male mating harassment. Here, we demonstrate how desert locusts in dense populations reduce such conflicts through behaviors. In transient populations (of solitarious morphology but gregarious behavior), we found that nongravid females occupied separate sites far from males and were not mating, whereas males aggregated on open ground (leks), waiting for gravid females to enter the lekking sites. Once a male mounted a gravid female, no other males attacked the pair; mating pairs were thereby protected during the vulnerable time of oviposition. In comparison, solitarious locusts displayed a balanced sex ratio in low-density populations, and females mated irrespective of their ovarian state. Our results indicate that the mating behaviors of desert locusts are density dependent and that sex-biased behavioral group separation may minimize the costs of male mating harassment and competition.

Mots-clés Agrovoc : comportement sexuel, Schistocerca gregaria, écologie animale, sex ratio, comportement animal, écologie des populations, accouplement, Acrididae

Mots-clés géographiques Agrovoc : Mauritanie, désert du Sahara

Mots-clés libres : Desert locust, Mate choice, Mating behavior, Operational sex ratio, Sexual selection

Classification Agris : H10 - Ravageurs des plantes
L20 - Écologie animale

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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