Form-assortative mating behaviors of individuals from parasitic and non-parasitic populations of Arctic lamprey (Lethenteron camtschaticum)

• DOI: 10.1093/beheco/arae073
• Publication Date: 2024-09-20T03:28:56Z
• Authors: Léa Daupagne; Chiharu Furusawa; Hironori Mieda; Osamu Kishida; Emilien Lasne; Cédric Tentelier; Itsuro Koizumi
• Keywords: Assortative mating; Ecological speciation; Disruptive selection; Reproductive isolation; Genetic algorithm; Mating preferences

Abstract Evolutionary theory predicts that assortative mating is crucial for sympatric speciation by generating reproductive isolation between diverging populations. Here, we investigate the potential of form-assortative mating, an assumed pattern in lampreys, speciation. By continuously recording activity anadromous and freshwater-resident forms L. camtschaticum greatly differ body size, show lampreys tend to mate with individuals similar size experimental conditions. However, highlight this does not result from a choice same-form partner but simultaneous action preference males – whatever their large females, higher competitive ability aggressive physical constraints on heteroform pairs. Moreover, do advocate speciation, as sole consequence through sexual selection, plausible mechanism diversification significant number sneaking behaviors were observed toward females. Broader attention should be given mechanisms other than selection may lead such variations spatial or temporal distribution alternative during season.