Naphthenic acid fraction compounds reduce the reproductive success of wood frogs (Rana sylvatica) by affecting offspring viability.

Autor: Robinson CE; Department of Biology, Queen's University; Kingston, Ontario, K7L 3N6, Canada., Elvidge CK; Department of Biology, Queen's University; Kingston, Ontario, K7L 3N6, Canada., Frank RA; Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, L7S 1A1, Canada., Headley JV; Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Saskatoon, Saskatchewan, S7N 3H5, Canada., Hewitt LM; Water Science and Technology Directorate, Environment and Climate Change Canada, Burlington, Ontario, L7S 1A1, Canada., Little AG; Department of Biology, Queen's University; Kingston, Ontario, K7L 3N6, Canada., Robinson SA; Ecotoxicoloy and Wildlife Health Division, Environment and Climate Change Canada, Ottawa, K1A 0H3, Ontario, Canada., Trudeau VL; Department of Biology, University of Ottawa; Ottawa, Ontario, K1N 6N5, Canada., Vander Meulen IJ; Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, Saskatoon, Saskatchewan, S7N 3H5, Canada; Department of Civil, Geological and Environmental Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5A9, Canada., Orihel DM; Department of Biology, Queen's University; Kingston, Ontario, K7L 3N6, Canada; School of Environmental Studies, Queen's University; Kingston, Ontario, K7L 3N6, Canada. Electronic address: diane.orihel@queensu.ca.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2023 Jan 01; Vol. 316 (Pt 1), pp. 120455. Date of Electronic Publication: 2022 Oct 18.
DOI: 10.1016/j.envpol.2022.120455
Abstrakt: Understanding the toxicity of organic compounds in oil sands process-affected water (OSPW) is necessary to inform the development of environmental guidelines related to wastewater management in Canada's oil sands region. In the present study, we investigated the effects of naphthenic acid fraction compounds (NAFCs), one of the most toxic components of OSPW, on mating behaviour, fertility, and offspring viability in the wood frog (Rana sylvatica). Wild adult wood frogs were exposed separately from the opposite sex to 0, 5, or 10 mg/L of OSPW-derived NAFCs for 24 h and then combined in outdoor lake water mesocosms containing the same NAFC concentrations (n = 2 males and 1 female per mesocosm, n = 3 mesocosms per treatment). Mating events were recorded for 48 h and egg masses were measured to determine adult fertility. NAFC exposure had no significant effect on mating behaviour (probability of amplexus and oviposition, amplexus and oviposition latency, total duration of amplexus and number of amplectic events) or fertility (fertilization success and clutch size). Tadpoles (50 individuals per mesocosm at hatching, and 15 individuals per mesocosm from 42 d post-hatch) were reared in the same mesocosms under chronic NAFC exposure until metamorphic climax (61-85 d after hatching). Offspring exposed to 10 mg/L NAFCs during development were less likely to survive and complete metamorphosis, grew at a reduced rate, and displayed more frequent morphological abnormalities. These abnormalities included limb anomalies at metamorphosis, described for the first time after NAFC exposure. The results of this study suggest that NAFCs reduce wood frog reproductive success through declines in offspring viability and therefore raise the concern that exposure to NAFCs during reproduction and development may affect the recruitment of native amphibian populations in the oil sands region.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: