Parasitism reduces oxidative stress of fish host experimentally exposed to PAHs
(2021) In Ecotoxicology and Environmental Safety 219.- Abstract
Some parasites are known to bioaccumulate some environmental pollutants within their host. We hypothesized that these parasites may be beneficial for their hosts in polluted environments. We experimentally increased long-term (five weeks) exposure to polycyclic aromatic hydrocarbons (PAHs, three levels: 0.1X, 1X, 10X environmental exposure) in European chubs (Squalius cephalus) that were naturally infected or uninfected with acanthocephalan parasites. We monitored PAHs levels in fish tissues, as well as oxidative stress, telomere length and condition indices. Although parasite infection did not significantly reduce the levels of PAHs and PAH metabolites in host tissues, host oxidative status was explained by parasitism and pollution... (More)
Some parasites are known to bioaccumulate some environmental pollutants within their host. We hypothesized that these parasites may be beneficial for their hosts in polluted environments. We experimentally increased long-term (five weeks) exposure to polycyclic aromatic hydrocarbons (PAHs, three levels: 0.1X, 1X, 10X environmental exposure) in European chubs (Squalius cephalus) that were naturally infected or uninfected with acanthocephalan parasites. We monitored PAHs levels in fish tissues, as well as oxidative stress, telomere length and condition indices. Although parasite infection did not significantly reduce the levels of PAHs and PAH metabolites in host tissues, host oxidative status was explained by parasitism and pollution levels. Oxidative damage increased with parasitism in fish exposed to low PAH levels (0.1X) but decreased in infected fish at higher PAH exposure (10X), thus corroborating our hypothesis. Meanwhile, antioxidant capacity did not differ in response to parasite infection nor PAHs exposure. Despite this imbalance in oxidative status, experimental increase in PAH levels did not compromise telomere length, body condition, or survival in infected and uninfected fish. This study provides the first experimental evidence that the outcome of host-parasite interactions can shift from negative to positive as pollutant exposure increases.
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- author
- Molbert, Noëlie LU ; Agostini, Simon ; Alliot, Fabrice ; Angelier, Frédéric ; Biard, Clotilde ; Decencière, Beatriz ; Leroux-Coyau, Mathieu ; Millot, Alexis ; Ribout, Cécile and Goutte, Aurélie
- publishing date
- 2021-08
- type
- Contribution to journal
- publication status
- published
- keywords
- Aquatic ecotoxicology, Acanthocephalan, Ecophysiology, Metabolites, Telomeres, Wildlife
- in
- Ecotoxicology and Environmental Safety
- volume
- 219
- article number
- 112322
- publisher
- Elsevier
- external identifiers
-
- scopus:85105602243
- pmid:33991931
- ISSN
- 0147-6513
- DOI
- 10.1016/j.ecoenv.2021.112322
- language
- English
- LU publication?
- no
- additional info
- Copyright © 2021. Published by Elsevier Inc.
- id
- 1b72be6f-0408-4c5d-ac63-e1d1f721700b
- date added to LUP
- 2021-11-03 16:29:31
- date last changed
- 2024-06-29 01:39:10
@article{1b72be6f-0408-4c5d-ac63-e1d1f721700b,
abstract = {{<p>Some parasites are known to bioaccumulate some environmental pollutants within their host. We hypothesized that these parasites may be beneficial for their hosts in polluted environments. We experimentally increased long-term (five weeks) exposure to polycyclic aromatic hydrocarbons (PAHs, three levels: 0.1X, 1X, 10X environmental exposure) in European chubs (Squalius cephalus) that were naturally infected or uninfected with acanthocephalan parasites. We monitored PAHs levels in fish tissues, as well as oxidative stress, telomere length and condition indices. Although parasite infection did not significantly reduce the levels of PAHs and PAH metabolites in host tissues, host oxidative status was explained by parasitism and pollution levels. Oxidative damage increased with parasitism in fish exposed to low PAH levels (0.1X) but decreased in infected fish at higher PAH exposure (10X), thus corroborating our hypothesis. Meanwhile, antioxidant capacity did not differ in response to parasite infection nor PAHs exposure. Despite this imbalance in oxidative status, experimental increase in PAH levels did not compromise telomere length, body condition, or survival in infected and uninfected fish. This study provides the first experimental evidence that the outcome of host-parasite interactions can shift from negative to positive as pollutant exposure increases.</p>}},
author = {{Molbert, Noëlie and Agostini, Simon and Alliot, Fabrice and Angelier, Frédéric and Biard, Clotilde and Decencière, Beatriz and Leroux-Coyau, Mathieu and Millot, Alexis and Ribout, Cécile and Goutte, Aurélie}},
issn = {{0147-6513}},
keywords = {{Aquatic ecotoxicology; Acanthocephalan; Ecophysiology; Metabolites; Telomeres; Wildlife}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{Ecotoxicology and Environmental Safety}},
title = {{Parasitism reduces oxidative stress of fish host experimentally exposed to PAHs}},
url = {{http://dx.doi.org/10.1016/j.ecoenv.2021.112322}},
doi = {{10.1016/j.ecoenv.2021.112322}},
volume = {{219}},
year = {{2021}},
}