Data/hora: 02/06/2024 05:44:05

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Use of fish otoliths as a temporal biomarker of field uranium exposure
Autores: | Mounicou, S.; Frelon, S.; Le Guernic, A.; Eb-levadoux, Y.; Camilleri, V.; Fevrier, L.; Pierrisnard, S.; Carasco, L.; Gilbin, R.; Mahé, Kelig; Tabouret, Helene; Bareille, G.; Simon, O.
Data: | 2019-11
Ano: | 2019
Palavras-chave: | Roach; Accumulation; Laser ablation ICP-MS.
Resumo: | This study aimed to determine uranium (U) pollution over time using otoliths as a marker of fish U contamination. Experiments were performed in field contamination (~20 μg L−1: encaged fish: 15d, 50d and collected wild fish) and in laboratory exposure conditions (20 and 250 μg L−1, 20d). We reported the U seasonal concentrations in field waterborne exposed roach fish (Rutilus rutilus), in organs and otoliths. Otoliths were analyzed by ICPMS and LA-ICP SF MS of the entire growth zone. Concentrations were measured on transects from nucleus to the edge of otoliths to characterize environmental variations of metal accumulation. Results showed a spatial and temporal variation of U contamination in water (from 51 to 9.4 μg L−1 at the surface of the water column), a high and seasonal accumulation in fish organs, mainly the digestive tract (from 1000 to 30,000 ng g−1, fw), the gills (from 1600 to 3200 ng g−1, fw) and the muscle (from 144 to 1054 ng g−1, fw). U was detected throughout the otolith and accumulation varied over the season from 70 to 350 ng g−1, close to the values measured (310 ng g−1) after high exposure levels in laboratory conditions. U in otoliths of encaged fish showed rapid and high U accumulation from 20 to 150 ng g−1. The U accumulation signal was mainly detected on the edge of the otolith, showing two U accumulation peaks, probably correlated to fish age, i.e. 2 years old. Surprisingly, elemental U and Zn signatures followed the same pattern therefore using the same uptake pathways. Laboratory, caging and field experiments indicated that otoliths were able to quickly accumulate U on the surface even for low levels and to store high levels of U. This study is an encouraging first step in using otoliths as a marker of U exposure.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00505/61622/65534.pdf

DOI:10.1016/j.scitotenv.2019.06.534

https://archimer.ifremer.fr/doc/00505/61622/

Editor: | Elsevier BV
Formato: | application/pdf
Fonte: | Science Of The Total Environment (0048-9697) (Elsevier BV), 2019-11 , Vol. 690 , P. 511-521

Fonte:

info:eu-repo/semantics/openAccess

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