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Detection of conspecific and heterospecific alarm signals by juvenile pumpkinseed under weak acidic conditions
Author(s) -
Leduc A. O. H. C.,
Noseworthy M. K.,
Adrian J. C.,
Brown G. E.
Publication year - 2003
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1046/j.1095-8649.2003.00230.x
Subject(s) - lepomis , biology , alarm , juvenile , centrarchidae , guild , alarm signal , perciformes , sympatric speciation , ecology , predation , zoology , fishery , fish <actinopterygii> , micropterus , bass (fish) , materials science , habitat , composite material
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.