Density-dependent mating behaviors reduce male mating harassment in locusts

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  • Koutaro Ould Maeno
    Livestock and Environment Division, Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba 305-8686, Japan;
  • Cyril Piou
    Centre de coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Unité mixte de recherche Centre de Biologie pour la Gestion des Populations (CBGP), Institut National de Recherche pour l’Agriculture, l’alimentation et l’Environnement (INRAE), Institut Agro, Institut de Recherche pour le Développement (IRD), Université de Montpellier, F-34398 Montpellier, France;
  • Sidi Ould Ely
    Centre National de Lutte Anti-acridienne (CNLA), BP 665, Nouakchott, Mauritania;
  • Sid’Ahmed Ould Mohamed
    Centre National de Lutte Anti-acridienne (CNLA), BP 665, Nouakchott, Mauritania;
  • Mohamed El Hacen Jaavar
    Centre National de Lutte Anti-acridienne (CNLA), BP 665, Nouakchott, Mauritania;
  • Saïd Ghaout
    Centre National de Lutte Anti-acridienne (CNLAA), BP 125 Agadir, Morocco;
  • Mohamed Abdallahi Ould Babah Ebbe
    Centre National de Lutte Anti-acridienne (CNLA), BP 665, Nouakchott, Mauritania;

抄録

<jats:title>Significance</jats:title><jats:p>In animal societies, social life often generates male mating harassment. How do communal animals manage such conflicts without escalating antagonistic relationships? In the Sahara Desert, we studied the mating system of gregarious-behaving desert locusts, the world’s most destructive locust. Despite being widespread and abundant during plagues, its populations are otherwise difficult to access, and its reproductive behaviors in the field are understudied. We show that female locusts behaviorally overcome the costs of male mating harassment: females occupy separate sites before and after mating. Only females with ripe ovaries arrive at male-biased lekking groups. Hence, substantial social conflicts can be simply managed by behaviors. These findings invite to explore the evolutionary hypotheses behind lekking with a density-dependent plastic species.</jats:p>

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