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Persistence of dragonfly exuviae on vegetation and rock substrates

March 1, 2009

Surveys of dragonfly exuviae have been used to assess rare species' habitats, lake water quality status, and wetland restoration programs. Knowledge of the persistence of exuviae on various substrates is necessary to accurately interpret exuvial surveys. In 2006, we recorded exuvial persistence at defined areas in a variety of small freshwater wetlands in Rhode Island. Exuviae were field-identified, labeled with small daubs of nail polish, and observed every three weeks from June through September. Overall, exuvial persistence displayed exponential decline, disappearing rapidly during the first few weeks, and more slowly thereafter. The initial rate of decline was similar for most species, but differed in some taxa. There was no significant difference in exuvial retention on emergent vegetation vs. rock substrate.

Publication Year 2009
Title Persistence of dragonfly exuviae on vegetation and rock substrates
DOI 10.1656/045.016.0112
Authors Maria A. Aliberti Lubertazzi, H. S. Ginsberg
Publication Type Article
Publication Subtype Journal Article
Series Title Northeastern Naturalist
Index ID 5224962
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center