Manzano-Winkler Brenda, Hish Alexander J, Aarons Emily K, Noor Mohamed A F
Biology Department Duke University Durham North California.
Ecol Evol. 2017 Mar 6;7(7):2268-2272. doi: 10.1002/ece3.2855. eCollection 2017 Apr.
While females often reject courtship attempts by heterospecific males, reproductive interference by harassment from such males can nonetheless occur, potentially reducing female fitness. Such effects may be profound following a range expansion, when males from a new species may suddenly encounter (and perhaps even become abundant relative to) females of related native species. recently invaded North America and may impact native species through reproductive interference and other processes. We test for the potential for reproductive interference by males on females in the laboratory. males aggressively copulated with females, including many females that exhibit rejection behaviors. Despite females attempting to dismount the males, the heterospecific copulations are on average longer than conspecific copulations, and females exhibit some reluctance to remate with conspecific males following this harassment. Females confined with both conspecific and heterospecific males produce fewer adult progeny than those with either conspecific males only or with conspecific males and distantly related males that do not engage in female harassment. Overall, our results illustrate how reproductive interference by an invasive species can have negative effects on resident natural populations.
虽然雌性通常会拒绝异种雄性的求偶尝试，但此类雄性的骚扰所导致的生殖干扰仍可能发生，这可能会降低雌性的适合度。在物种范围扩张之后，这种影响可能会很显著，因为新物种的雄性可能会突然遇到（甚至相对于）相关本地物种的雌性变得数量众多。[物种名称]最近入侵了北美，可能会通过生殖干扰和其他过程影响本地物种。我们在实验室中测试了[物种名称]雄性对[物种名称]雌性进行生殖干扰的可能性。[物种名称]雄性会主动与[物种名称]雌性交配，包括许多表现出拒绝行为的雌性。尽管雌性试图从雄性身上挣脱，但异种交配的平均时间比同种交配更长，并且在这种骚扰之后，雌性会表现出一些不愿意再与同种雄性交配的情况。与同种和异种雄性一起饲养的雌性所产生的成年后代比仅与同种雄性或与同种雄性以及不骚扰雌性的远亲[物种名称]雄性一起饲养的雌性要少。总体而言，我们的结果说明了入侵物种的生殖干扰如何会对当地自然种群产生负面影响。
