期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 24, 期 24, 页码 19624-19634出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-017-9609-x
关键词
Arrhenius break point temperature; Critical thermalmaximum; CTMAX; Fish; Heart rate; Oil spill; PAH
资金
- Kone Foundation
- Turku Collegium for Science and Medicine
- Academy of Finland [258078]
- ITOPF
- Total-Fluides through the project FishHealth
- Academy of Finland (AKA) [258078, 258078] Funding Source: Academy of Finland (AKA)
Oil spills pose a threat to aquatic organisms. However, the physiological effects of crude oil on cardiac function and on thermal tolerance of juvenile fish are still poorly understood. Consequently, in this paper, we will present results of two separate experiments where we exposed juvenile rainbow trout and European sea bass to crude oil and made cardiac thermal tolerances and maximum heart rate (f(Hmax)) measurements after 1 week (rainbow trout) and 6-month recovery (sea bass). In both species, the f(Hmax) was lower in crude oil-exposed fish than in the control ones at temperatures below the optimum but this difference disappeared at higher temperatures. More importantly, the oil-exposed fish had significantly higher Arrhenius break point temperature for f (Hmax), which gave an estimate for optimum temperature, than the control fish in both species even though the exposure conditions and recovery times differed between species. The results indicated that exposure of juvenile fish to crude oil did not have a significant negative impact upon their cardiac performance in high temperatures and upper thermal tolerance increased when the fish were tested 1 week or 6 months after the exposure. Our findings suggest that the cardiac function and thermal tolerance of juvenile fish are relatively resistant to a crude oil exposure.
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