When invasive ants meet: effects of outbreeding on queen performance in the tramp ant Cardiocondyla itsukii

Jürgen Heinze; Sabine Frohschammer; Abel Bernadou

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When invasive ants meet: effects of outbreeding on queen performance in the tramp ant Cardiocondyla itsukii

机译：当侵入性蚂蚁相遇时：杂种对流浪蚁Cardiocondyla itsukii中女王表现的影响

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Most disturbed habitats in the tropics and subtropics harbor numerous species of invasive ants,and occasionally the same species has been introduced repeatedly from multiple geographical sources.We examined how experimental crossbreeding between sexuals from different populations affects the fitness of queens of the tramp ant Cardiocondyla itsukii,which is widely distributed in Asia and the Pacific Islands.Eggs laid by queens that mated with nestmate males had a higher hatching rate than eggs laid by queens mated to males from neighboring (Hawaii x Kauai) or distant introduced populations (Hawaii/Kauai x Okinawa).Furthermore,inbreeding queens had a longer lifespan and produced a less female-biased offspring sex ratio than queens from allopatric mating.This suggests that the genetic divergence between different source populations may already be so large that in case of multiple invasions eventual crossbreeding might negatively affect the fitness of tramp ants.

机译：在热带和亚热带，大多数受干扰的栖息地都藏有多种入侵性蚂蚁，偶尔也会从多个地理来源反复引入同一物种。我们研究了不同种群之间性交的实验性杂交如何影响流浪者Cardiocondyla itsukii的后代适应性。，与邻居的雄性交配的皇后所产的卵的孵化率高于来自邻近（夏威夷州×考艾岛）或远处传入种群的雄性的皇后所产卵的孵化率。此外，近亲繁殖后代的寿命比异种繁殖后代的寿命更长，女性偏爱的后代性别比也较小。这表明不同来源种群之间的遗传差异可能已经很大，以至于在多次入侵的情况下最终杂交可能会对流氓蚂蚁的健康产生负面影响。

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《中国昆虫科学：英文版》 |2019年第2期|333-340|共8页
作者
Jürgen Heinze; Sabine Frohschammer; Abel Bernadou;
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LS ZoologielEvolutionsbiologie, Universit(a)t Regensburg, Regensburg, Germany;

LS ZoologielEvolutionsbiologie, Universit(a)t Regensburg, Regensburg, Germany;

LS ZoologielEvolutionsbiologie, Universit(a)t Regensburg, Regensburg, Germany;

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When invasive ants meet: effects of outbreeding on queen performance in the tramp ant Cardiocondyla itsukii

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