You are here: Home
/ Publication Information
Title: Behavior responses of Drunella coloradensis (Ephemeroptera) nymphs to short-term pH reductions
Author: Pennuto, Christopher M.; deNoyelles, Frank Jr.;
Source: Canadian Journal of Fish and Aquatic Sciences. 50: 2692-2697.
Publication Series: Scientific Journal (JRNL)
Description: Behavioral responses of Drunella coloradensis nymphs were examined in outdoor experimental stream channels after pH reductions of 7 and 2 pH units below ambient. The severity of pH decline below the ambient of 7.8 influenced the behavior patterns displayed by nymphs. At pH 7.01 (an intermediate pH decline) nymphs sat less frequently and burrowed more than controls. Burrowing behavior frequency returned to control levels and drifting and crawling behaviors increased relative to controls at pH 6.02, Ventilatory behaviors increased with pH decline, but were independent of the severity of acidity increases. These results suggest that individual behaviors may offer a more sensitive indicator of sub-acute stress in aquatic insect communities than population or community monitoring. Behaviors leading to increased activity levels in stream insects may have community-level effects via changes in predator-prey encounter rates or increased susceptibility to passive drift. These potential changes are discussed in reference to monitoring for acidification effects.
Keywords: Drunella coloradensis nymphs, short-term pH reductions
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Pennuto, Christopher M.; deNoyelles, Frank, Jr. 1993. Behavior responses of Drunella coloradensis (Ephemeroptera) nymphs to short-term pH reductions. Canadian Journal of Fish and Aquatic Sciences. 50: 2692-2697.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility