Emerging Pathogens and a Current-Use Pesticide: Potential Impacts on Eastern Hellbenders.
Journal
Journal of aquatic animal health
ISSN: 1548-8667
Titre abrégé: J Aquat Anim Health
Pays: United States
ID NLM: 9884881
Informations de publication
Date de publication:
03 2021
03 2021
Historique:
revised:
15
08
2020
received:
10
12
2019
accepted:
05
10
2020
pubmed:
17
2
2021
medline:
14
10
2021
entrez:
16
2
2021
Statut:
ppublish
Résumé
Populations of the eastern hellbender Cryptobranchus alleganiensis alleganiensis have been declining for decades, and emerging pathogens and pesticides are hypothesized to be contributing factors. However, few empirical studies have attempted to test the potential effects of these factors on hellbenders. We simultaneously exposed subadult hellbenders to environmentally relevant concentrations of either Batrachochytrium dendrobatidis (Bd) or a frog virus 3-like ranavirus (RV), a combination of the pathogens, or each pathogen following exposure to a glyphosate herbicide (Roundup). Additionally, we measured the ability of the skin mucosome to inactivate Bd and RV in growth assays. We found that mucosome significantly inactivated RV by an average of 40% but had no negative effects on Bd growth. All treatments that included RV exposure experienced reduced survival compared to controls, and the combination of RV and herbicide resulted in 100% mortality. Histopathology verified RV as the cause of mortality in all RV-exposed treatments. No animals were infected with Bd or died in the Bd-only treatment. Our results suggest that RV exposure may be a significant threat to the survival of subadult hellbenders and that Roundup exposure may potentially exacerbate this threat.
Substances chimiques
Herbicides
0
Glycine
TE7660XO1C
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
24-32Subventions
Organisme : NIAID NIH HHS
ID : R24 AI059830
Pays : United States
Informations de copyright
© 2020 American Fisheries Society.
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