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Assessing chronic fish health: An application to a case of an acute exposure to chemically treated crude oil
- Source :
- Aquatic Toxicology, Aquatic Toxicology, Elsevier, 2016, 178, pp.197-208. ⟨10.1016/j.aquatox.2016.07.019⟩, Aquatic Toxicology (0166-445X) (Elsevier Science Bv), 2016-09, Vol. 178, P. 197-208
- Publication Year :
- 2016
- Publisher :
- HAL CCSD, 2016.
-
Abstract
- 00000 ăWOS:000382802100022; International audience; Human alteration of marine ecosystems is substantial and growing. Yet, no adequate methodology exists that provides reliable predictions of how environmental degradation will affect these ecosystems at a relevant level of biological organization. The primary objective of this study was to develop a methodology to evaluate a fish's capacity to face a well-established environmental challenge, an exposure to chemically dispersed oil, and characterize the long-term consequences. Therefore, we applied high-throughput, non-lethal challenge tests to assess hypoxia tolerance, temperature susceptibility and maximal swimming speed as proxies for a fish's functional integrity. These whole animal challenge tests were implemented before (1 month) and after (1 month) juvenile European sea bass (Dicentrarchus labrax) had been acutely exposed (48 h) to a mixture containing 0.08 g L-1 of weathered Arabian light crude oil plus 4% dispersant (Corexit(C) EC9500A), a realistic exposure concentration during an oil spill. In addition, experimental populations were then transferred into semi-natural tidal mesocosm ponds and correlates of Darwinian fitness (growth and survival) were monitored over a period of 4 months. Our results revealed that fish acutely exposed to chemically dispersed oil remained impaired in terms of their hypoxia tolerance and swimming performance, but not in temperature susceptibility for 1 month post-exposure. Nevertheless, these functional impairments had no subsequent ecological consequences under mildly selective environmental conditions since growth and survival were not impacted during the mesocosm pond study. Furthermore, the earlier effects on fish performance were presumably temporary because re-testing the fish 10 months post-exposure revealed no significant residual effects on hypoxia tolerance, temperature susceptibility and maximal swimming speed. We propose that the functional proxies and correlates of Darwinian fitness used here provide a useful assessment tool for fish health in the marine environment.
- Subjects :
- 030110 physiology
0301 basic medicine
Health, Toxicology and Mutagenesis
Growth
010501 environmental sciences
01 natural sciences
Mesocosm
Darwinian Fitness
swimming
Hypoxia
Behavior, Animal
Ecology
Temperature
Hypoxia (environmental)
petroleum-hydrocarbons
Petroleum
Ecological performance
dicentrarchus-labrax
Dicentrarchus
Physiological integrity
growth
european sea bass
Zoology
Dispersant
Aquatic Science
Biology
critical swimming speed
juvenile rainbow-trout
wildlife health
03 medical and health sciences
Animals
Juvenile
Marine ecosystem
Ecosystem
sole solea-solea
14. Life underwater
Sea bass
Swimming
0105 earth and related environmental sciences
ACL
Oil spill
temperature
water-soluble fraction
biology.organism_classification
Fish
herring clupea-pallasi
13. Climate action
Bass
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Water Pollutants, Chemical
Biomarkers
trout oncorhynchus-mykiss
Subjects
Details
- Language :
- English
- ISSN :
- 0166445X
- Database :
- OpenAIRE
- Journal :
- Aquatic Toxicology, Aquatic Toxicology, Elsevier, 2016, 178, pp.197-208. ⟨10.1016/j.aquatox.2016.07.019⟩, Aquatic Toxicology (0166-445X) (Elsevier Science Bv), 2016-09, Vol. 178, P. 197-208
- Accession number :
- edsair.doi.dedup.....d64f065c3b3bd3994975f09a315d90e4