Dose- and time-dependent effects of an immune challenge on fish across biological levels.
dose-response
ecoimmunology
energy storage
oxidative stress
pathogen
sickness behavior
Journal
Journal of experimental zoology. Part A, Ecological and integrative physiology
ISSN: 2471-5646
Titre abrégé: J Exp Zool A Ecol Integr Physiol
Pays: United States
ID NLM: 101710204
Informations de publication
Date de publication:
02 2021
02 2021
Historique:
received:
08
09
2020
revised:
30
10
2020
accepted:
30
10
2020
pubmed:
18
11
2020
medline:
20
7
2021
entrez:
17
11
2020
Statut:
ppublish
Résumé
Due to global changes, fish are increasingly exposed to immune challenges associated with disease outbreaks in aquatic ecosystems. Adjustments in physiology and behavior are generally critical to maintaining homeostasis after an immune challenge, but there is limited knowledge on the specific thresholds and dynamics of responses across levels of biological organization in fish. In this study, we tested how different concentrations of an antigens mixture (phytohemagglutinin and lipopolysaccharide) affected innate immunity with potential consequences on oxidative stress, energy reserves, body condition, and behavior across time, using the common gudgeon (Gobio sp.) as model species. The immune challenge induced a transitory increase in lytic enzyme activity (i.e., lysozyme) and local immune response (i.e., skin swelling) 2 days after the antigen injection. The available energy stored in muscle was also reduced 4 days after injection, without inducing oxidative stress at the cellular level. Overall, the immune challenge induced limited costs at the molecular and cellular levels but had strong effects at the whole organism level, especially on behavior. Indeed, fish swimming activity and sociability were affected in a dose- and time-dependent manner. These results suggest that immune challenges have dose-dependent effects across levels of biological organization and that behavior is a key response trait to cope with pathogen-induced immune costs in the wild, although fitness consequences remain to be tested.
Substances chimiques
Lipopolysaccharides
0
Banques de données
figshare
['10.6084/m9.figshare.13182665.v1']
Types de publication
Journal Article
Randomized Controlled Trial, Veterinary
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
250-264Informations de copyright
© 2020 Wiley Periodicals LLC.
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