Biased dispersal of Metrioptera bicolor, a wing dimorphic bush-cricket

Ina Monika Margret Heidinger; Silke Hein; Heike Feldhaar; Hans-Joachim Poethke

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Biased dispersal of Metrioptera bicolor, a wing dimorphic bush-cricket

机译：翼形双态灌木-双色翼翅目的偏向散布

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In the highly fragmented landscape of central Europe,dispersal is of particular importance as it determines the long-term survival of animal populations.Dispersal not only secures the recolonization of patches where populations went extinct,it may also rescue small populations and thus prevent local extinction events.As dispersal involves different individual fitness costs,the decision to disperse should not be random but contextdependent and often will be biased toward a certain group of individuals (e.g.,sex-and wing morph-biased dispersal).Although biased dispersal has far-reaching consequences for animal populations,immediate studies of sex-and wing morph-biased dispersal in orthopterans are very rare.Here,we used a combined approach of morphological and genetic analyses to investigate biased dispersal ofMetrioptera bicolor,a wing dimorphic bush-cricket.Our results clearly show wing morph-biased dispersal for both sexes of M.bicolor.In addition,we found sex-biased dispersal for macropterous individuals,but not for micropters.Both,morphological and genetic data,favor macropterous males as dispersal unit of this bush-cricket species.To get an idea of the flight ability ofM.bicolor,we compared our morphological data with that of Locusta migratoria and Schistocerca gregaria,which are very good flyers.Based on our morphological data,we suggest a good flight ability for macropters of M.bicolor,although flying individuals of this species are seldom observed.

机译：在中欧高度分散的景观中，分散尤为重要，因为它决定了动物种群的长期生存。分散不仅可以确保种群灭绝的斑块的重新定殖，还可以营救小种群，从而防止局部灭绝由于分散涉及不同的个体适应性成本，因此分散决策不应是随机的，而应取决于具体情况，并且通常会偏向特定的个人群体（例如，性别和机翼形态偏向的分散）。达到对动物种群的影响，在直翅类动物中对性别和翼形偏向的散布进行立即研究非常少见。在这里，我们采用形态学和遗传分析相结合的方法来研究双翅目双翅目bush翅偏向bush的偏向散布。结果清楚地表明了双色M.性别的机翼偏向色散。此外，我们发现了mac的性别偏向色散。形态和遗传数据都偏向于大型bush类雄性作为这种bush类动物的传播单位。为了了解双色M的飞行能力，我们将形态学数据与南方蝗的形态学数据进行了比较。根据我们的形态学数据，我们建议双色红macro的大型蝇具有良好的飞行能力，尽管很少观察到该物种的飞行个体。

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《中国昆虫科学：英文版》 |2018年第2期|297-308|共12页
作者
Ina Monika Margret Heidinger; Silke Hein; Heike Feldhaar; Hans-Joachim Poethke;
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作者单位

Field Station Fabrikschleichach, University of Würzburg, Rauhenebrach, Germany;

Bavarian State Institute for Viticulture and Horticulture, Bee Research Center, An der Steige 15, 97206 Veitsh(o)chheim, Germany;

W(a)sseri 8, CH-8816 Hirzel, Switzerland;

Department of Animal Ecology I, University of Bayreuth, Bayreuth, Germany;

Field Station Fabrikschleichach, University of Würzburg, Rauhenebrach, Germany;

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Biased dispersal of Metrioptera bicolor, a wing dimorphic bush-cricket

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