期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 132, 期 -, 页码 145-152出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2016.05.035
关键词
Trophic exposition; Petroleum hydrocarbons; Critical swimming speed; Aerobic metabolic rate; Sub-lethal concentration
资金
- ANR project ConPhyPoP [CES 09_002]
- Regional Council of Poitou-Charentes
Depending on their origins, polycyclic aromatic hydrocarbons (PAH) are characterized by different chemical properties. Petrogenic PAR (e.g. from fossil fuels) and pyrolytic PAH (e.g. those produced by incineration processes) are therefore expected to affect organisms differently. The impact of trophic exposure to these PAH was investigated on swimming and metabolic performance of zebrafish Danio rerio. Two-month-old juveniles and six-month-old adults were individually challenged following a swimming step protocol. While pyrolytic exposure did not affect fish whatever the duration of exposure, it appeared that petrogenic PAH impaired adults' performance. Indeed, the active metabolic rate in petrogenic PAH-contaminated adults was significantly reduced by 35%, and critical swimming speed by 26.5%. This was associated with cardiac abnormalities, which are expected to contribute to the reduction of oxygen transport, particularly during intensive effort. These results may be due to the different composition and toxicity of PAH mixtures. (C) 2016 Elsevier Inc. All rights reserved.
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