Detection of conspecific and heterospecific alarm signals by juvenile pumpkinseed under weak acidic conditions

A. O.H.C. Leduc*, M. K. Noseworthy, J. C. Adrian, G. E. Brown

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


Under neutral (pH 7.0) conditions, juvenile pumpkinseed Lepomis gibbosus exhibited significant antipredator responses, of similar intensities, to the chemical alarm cues of conspecifics, an allopatric congener the green sunfish Lepomis cyanellus and the artificial alarm cue of a sympatric prey guild member (Cyprinidae, hypoxanthine-3-N-oxide). Under weakly acidic conditions (pH 6.0), however, no increase in antipredator behaviour was seen in response to hypoxanthine-3-N-oxide and a quantitatively weaker response was found in response to conspecific and congener cues, suggesting that the use of chemical alarm cues by some prey fishes may be impaired by acid precipitation.

Original languageEnglish
Pages (from-to)1331-1336
Number of pages6
JournalJournal of Fish Biology
Issue number5
Publication statusPublished - Nov 2003
Externally publishedYes


  • Acid rain
  • Antipredator behaviour
  • Centrarchids
  • Chemical alarm cue
  • Hypoxanthine-3-N-oxide
  • Pumpkinseed

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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