Common pesticide increases costs of antipredator defenses in Rana temporaria tadpoles

被引:40
作者
Teplitsky, C
Piha, H [1 ]
Laurila, A
Merilä, J
机构
[1] Univ Helsinki, Dept Biol & Environm Sci, Ecol Genet Res Unit, FI-00014 Helsinki, Finland
[2] Uppsala Univ, Evolutionary Biol Ctr, Dept Populat Biol, SE-75236 Uppsala, Sweden
关键词
D O I
10.1021/es050127u
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Pesticides represent an important threat for natural populations. While their effects are assessed on short terms acute exposure, some of their harmful consequences may only become apparent when combined with other stressors, notably natural ones, such as predation. Here, we investigated in a laboratory experiment how exposure to a common fungicide (fenpropimorph) would affect the responses to predation in the common frog Rana temporaria, The concentrations of fungicide we used were comparable to those found in nature (0, 2, or 11 mu g/L). The higher concentration of fungicide reduced tadpole activity late in the experiment, and only 7% of the tadpoles reached metamorphosis. In the lower concentration, the ability to respond adaptively to predator presence was not affected, but the costs (delayed metamorphosis, smaller relative body size) of this response were increased. Our results highlight the need to investigate sublethal effects of pesticides on organismal performance if assessment of pesticides real impact is to be obtained.
引用
收藏
页码:6079 / 6085
页数:7
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