Show simple item record McPherson, Taryn D. Mirza, Reehan S. Pyle, Gregory 2014-06-04T22:11:29Z 2014-06-04T22:11:29Z 2004
dc.identifier.citation McPherson, T., R. Mirza, and G. Pyle. 2004. Responses of wild fishes to alarm chemicals in pristine and metal-contaminated lakes. Canadian Journal of Zoology, 82: 694-700. en_US
dc.description Sherpa Romeo green journal en_US
dc.description.abstract Responses of wild fish populations to alarm chemicals were examined in clean and metal-contaminated lakes in northern Ontario. Approximately 20 groups of three minnow traps were placed randomly in the littoral zone of each study lake. Within each minnow trap group, one trap was treated with a chemical alarm stimulus (Iowa darter (Etheostoma exile (Girard, 1859)) skin extract, prey-guild species, alarm cue present), one with swordtail (Xiphophorus helleri Heckel, 1848) skin extract (phylogenetically distant and allopatric from darters, alarm cue present but not recognized by darters), and one with distilled water (neutral control). Data included the identification and enumeration of fish captured in each trap after a 10-h set. Darters avoided areas labelled with the alarm stimulus relative to controls only in the clean lake; in contaminated lakes, darters did not avoid areas labelled with the alarm stimulus relative to controls. No effects of contamination on chemosensory function were observed for heterospecific non-darter prey-guild or predator-guild species. These findings suggest that chemical alarm systems do exist in nature, and that these systems appear to be affected by the presence of metals. Such pollution-related effects could lead to increased susceptibility of some fish species to predation and to population declines. en_US
dc.language.iso en_CA en_US
dc.publisher National Research Council of Canada en_US
dc.subject Fishes -- Effect of chemicals on -- Ontario en_US
dc.subject Chemical alarm stimulus en_US
dc.subject Metal-contaminated lakes en_US
dc.subject Iowa darters en_US
dc.title Responses of wild fishes to alarm chemicals in pristine and metal-contaminated lakes en_US
dc.type Article en_US
dc.publisher.faculty Arts and Science en_US
dc.publisher.department Department of Biology en_US
dc.description.peer-review Yes en_US
dc.publisher.institution University of Lethbridge en_US
dc.publisher.institution Nipissing University en_US
dc.publisher.institution Concordia University en_US

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