Inbreeding depression in monarch butterflies

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• 作者：Andrew J. Mongue ; Michelle V. Tsai ; Marta L. Wayne…
• 刊名：Journal of Insect Conservation
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：20
• 期：3
• 页码：477-483
• 全文大小：720 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Animal Systematics/Taxonomy/ Biogeography
  Evolutionary Biology
  Human Genetics
  
• 出版者：Springer Netherlands
• ISSN：1572-9753
• 卷排序：20

文摘

Monarch butterflies and their unique system of multigenerational migration have long fascinated the public, and concerns for the fate of this charismatic insect have grown due to the consistent declines in overwintering colony size over the last 20 years. Risks to this migratory insect have been considered in terms of climate change, habitat and thus population fragmentation, and decreased host plant availability. However, another obvious danger, that of decreased heterozygosity resulting from decreasing population size, has yet to be explored. Here we report experimental evidence for immediate inbreeding depression in individuals from the migratory population. Inbred matings produced less viable eggs and inbred offspring had higher developmental mortality and shorter lifespans. We discuss these results in the context of monarch migration extinction risk and suggest that additional genetic monitoring should be undertaken to protect this iconic animal.KeywordsPopulation dynamicsMigrationConservation planningGenetics