DNA study finds globe skimmer dragonflies share global gene pool
A Rutgers University study published in PLOS ONE reveals that globe skimmer dragonflies (Pantala flavescens) form a single global breeding population, with minimal genetic differences between specimens from India, Japan, Canada, and…
The Story in Brief
A Rutgers University study published in PLOS ONE reveals that globe skimmer dragonflies (Pantala flavescens) form a single global breeding population, with minimal genetic differences between specimens from India, Japan, Canada, and the United States. The analysis of 49 mitochondrial DNA sequences found only 4.26% of variation between geographic groups, suggesting these insects interbreed across oceans.
The genetic data supports earlier speculation that the globe skimmer is the world's longest-flying insect, with a migratory range exceeding 4,400 miles per generation. The group's annual circuit between India and East Africa may total 14,000 to 18,000 kilometres, surpassing the monarch butterfly's 2,500-mile journey and making it the only insect known to cross an ocean.
The Indian Opinion
The claim that globe skimmers outfly monarchs rests on genetic inference, not direct observation. The evidence is compelling but relies on just 49 DNA sequences. The real test will come when lightweight satellite tags or multi-year isotope studies are replicated across generations. Until then, crowning the dragonfly champion is premature.
Source: timesofindia.indiatimes.com
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