期刊
JOURNAL OF FRESHWATER ECOLOGY
卷 26, 期 1, 页码 59-63出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/02705060.2011.553829
关键词
amphibia; antipredator behavior; fertilizer; invasive species; native species
资金
- Denison University Research Foundation
- Howard Hughes Medical Institute
- Anderson Endowment of Denison University
We conducted a mesocosm experiment that allowed us to examine the effects of mosquitofish (Gambusia Willis) and ammonium nitrate on the activity of green frog (Lithobates clamitans) tadpoles under the more natural conditions of a mesocosm as opposed to a laboratory experiment. The proportion of active tadpoles was lower in the presence of mosquitofish than when mosquitofish were not present. There was no effect of ammonium nitrate or interaction between mosquitofish and ammonium nitrate on tadpole activity. These results suggest that green frog tadpoles reduce their activity levels in the presence of mosquitofish, but the ability of ammonium nitrate to mediate the outcome of potential predator-prey interactions between green frog tadpoles and mosquitofish appears to be limited, at least at the ecologically relevant concentration we studied.
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