Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax)
Accidental spills are pervasive pollution in aquatic ecosystems. Resorting to chemical dispersant is one of the most implemented strategies in response to oil spills, but it results in an increase in the bio-availability of oil compounds known to disturb fish neurosensory capacities and hence fish h...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651320314299 |
| _version_ | 1819276673200160768 |
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| author | Cassandre Aimon Christophe Lebigre Nicolas Le Bayon Stéphane Le Floch Guy Claireaux |
| author_facet | Cassandre Aimon Christophe Lebigre Nicolas Le Bayon Stéphane Le Floch Guy Claireaux |
| author_sort | Cassandre Aimon |
| collection | DOAJ |
| description | Accidental spills are pervasive pollution in aquatic ecosystems. Resorting to chemical dispersant is one of the most implemented strategies in response to oil spills, but it results in an increase in the bio-availability of oil compounds known to disturb fish neurosensory capacities and hence fish habitat use. While it has become well established that acute oil exposure can cause a range of physiological defects, sub-lethal consequences on animal behaviour have only received recent attention. Here we investigated the effect of an exposure to a 62 h- dispersant treated oil on the exploration tendency (exploratory activity, and avoidance of unfamiliar open areas) of juvenile European sea bass. Three different concentrations of chemically dispersed oil were tested, low and medium conditions bracketing the range of likely situations that fish encounter following an oil spill, the high dose representing a more severe condition. Fish recovery capacities were also evaluated during 2 weeks post-exposure. Our results suggest a dose-response relationship; the low dose (0.048 ± 0.007 g L-1 of total petroleum hydrocarbons ([TPH])) had no effect on sea bass behavioural response to a novel environment while medium (0.243 ± 0.012 g L-1 [TPH]) and high (0.902 ± 0.031 g L-1 [TPH]) doses altered fish exploratory activity and their typical avoidance of unfamiliar open areas. Our experiment also suggest signs of recovery capacities in the first 10 days following oil exposure even if fish might need more time to fully recover from observed alterations. We discuss the possibility that observed alterations may result from a neurosensory or physiological known defects of oil exposure, causing anaesthetic-like sedative behaviours. Altogether, this study shows that juvenile sea bass exposed to oil spill exhibit transient behavioural impairments that may have major population-level consequences given the high mortality experienced by juveniles. |
| first_indexed | 2024-12-23T23:43:57Z |
| format | Article |
| id | doaj.art-423ac236fc094a948224212694729932 |
| institution | Directory Open Access Journal |
| issn | 0147-6513 |
| language | English |
| last_indexed | 2024-12-23T23:43:57Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj.art-423ac236fc094a9482242126947299322022-12-21T17:25:34ZengElsevierEcotoxicology and Environmental Safety0147-65132021-01-01208111592Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax)Cassandre Aimon0Christophe Lebigre1Nicolas Le Bayon2Stéphane Le Floch3Guy Claireaux4Université de Bretagne Occidentale, LEMAR (UMR 6539), Centre Ifremer de Bretagne, 29280 Plouzané, France; CEDRE, Research Department, 715 rue Alain Colas, CS 41836, Brest 29218-Cedex 2, France; Corresponding author at: Univ Brest, Ifremer, CNRS, IRD, LEMAR, F-29280 Plouzané, France.Ifremer, Fisheries Science and Technology Unit (STH/LBH), Centre Ifremer de Bretagne, 29280 Plouzané, FranceIfremer, LEMAR (UMR 6539), Cezon crude oil impacts the developing hearts of large predntre Ifremer de Bretagne, 29280 Plouzané, FranceCEDRE, Research Department, 715 rue Alain Colas, CS 41836, Brest 29218-Cedex 2, FranceUniversité de Bretagne Occidentale, LEMAR (UMR 6539), Centre Ifremer de Bretagne, 29280 Plouzané, FranceAccidental spills are pervasive pollution in aquatic ecosystems. Resorting to chemical dispersant is one of the most implemented strategies in response to oil spills, but it results in an increase in the bio-availability of oil compounds known to disturb fish neurosensory capacities and hence fish habitat use. While it has become well established that acute oil exposure can cause a range of physiological defects, sub-lethal consequences on animal behaviour have only received recent attention. Here we investigated the effect of an exposure to a 62 h- dispersant treated oil on the exploration tendency (exploratory activity, and avoidance of unfamiliar open areas) of juvenile European sea bass. Three different concentrations of chemically dispersed oil were tested, low and medium conditions bracketing the range of likely situations that fish encounter following an oil spill, the high dose representing a more severe condition. Fish recovery capacities were also evaluated during 2 weeks post-exposure. Our results suggest a dose-response relationship; the low dose (0.048 ± 0.007 g L-1 of total petroleum hydrocarbons ([TPH])) had no effect on sea bass behavioural response to a novel environment while medium (0.243 ± 0.012 g L-1 [TPH]) and high (0.902 ± 0.031 g L-1 [TPH]) doses altered fish exploratory activity and their typical avoidance of unfamiliar open areas. Our experiment also suggest signs of recovery capacities in the first 10 days following oil exposure even if fish might need more time to fully recover from observed alterations. We discuss the possibility that observed alterations may result from a neurosensory or physiological known defects of oil exposure, causing anaesthetic-like sedative behaviours. Altogether, this study shows that juvenile sea bass exposed to oil spill exhibit transient behavioural impairments that may have major population-level consequences given the high mortality experienced by juveniles.http://www.sciencedirect.com/science/article/pii/S0147651320314299BehaviourOil spillTeleost fishExplorationOpen field testEuropean sea bass |
| spellingShingle | Cassandre Aimon Christophe Lebigre Nicolas Le Bayon Stéphane Le Floch Guy Claireaux Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) Ecotoxicology and Environmental Safety Behaviour Oil spill Teleost fish Exploration Open field test European sea bass |
| title | Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) |
| title_full | Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) |
| title_fullStr | Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) |
| title_full_unstemmed | Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) |
| title_short | Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax) |
| title_sort | effects of dispersant treated oil upon exploratory behaviour in juvenile european sea bass dicentrarchus labrax |
| topic | Behaviour Oil spill Teleost fish Exploration Open field test European sea bass |
| url | http://www.sciencedirect.com/science/article/pii/S0147651320314299 |
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