Concentrations of thirteen trace metals in scales of three nototheniid fishes from Antarctica (James Ross Island, Antarctic Peninsula)

0499371 - ÚBO 2020 RIV US eng J - Journal Article
Roche, Kevin Francis - Kuta, J. - Sedláček, I. - Červenka, R. - Tomanová, K. - Jurajda, Pavel
Concentrations of thirteen trace metals in scales of three nototheniid fishes from Antarctica (James Ross Island, Antarctic Peninsula).
Biological Trace Element Research. Roč. 191, č. 1 (2019), s. 214-223. ISSN 0163-4984. E-ISSN 1559-0720
R&D Projects: GA ČR(CZ) GBP505/12/G112
Institutional support: RVO:68081766
Keywords : Antarctic peninsula * Bioaccumulation * Czech Antarctic Station * Notothenioidei * Trace metal contaminants * Shallow coastal waters
OECD category: Biochemistry and molecular biology
Impact factor: 2.639, year: 2019
Method of publishing: Limited access
https://link.springer.com/article/10.1007%2Fs12011-018-1598-1

In this study, we assessed concentrations of 13 trace metals in the scales of Notothenia coriiceps, Trematomus bernacchii and Gobionotothen gibberifrons caught off the coast of James Ross Island (Antarctic Peninsula). Overall, our results for scales broadly match those of previous studies using different fish and different organs, with most metals found at trace levels and manganese, aluminium, iron and zinc occurring at high levels in all species. This suggests that scales can serve as a useful, non-invasive bioindicator of long-term contamination in Antarctic fishes. High accumulation of manganese, aluminium, iron and zinc is largely due to high levels in sediments associated with nearby active volcanic sites. Manganese, vanadium and aluminium showed significant positive bioaccumulation in T. bernacchii (along with non-significant positive accumulation of iron, zinc, cobalt and chromium), most likely due to greater dietary specialisation on sediment feeding benthic prey and higher trophic species. Levels of significance in bioaccumulation regressions were strongly affected by large-scale variation in the data, driven largely by individual differences in diet and/or changes in habitat use and sex differences associated with life stage and reproductive status. Increased levels of both airborne deposition and precipitation and meltwater runoff associated with climate change may be further adding to the already high levels of manganese, aluminium, iron and zinc in Antarctic Peninsula sediments. Further long-term studies are encouraged to elucidate mechanisms of uptake (especially for aluminium and iron) and possible intra- and interspecific impacts of climate change on the delicate Antarctic food web.
Permanent Link: http://hdl.handle.net/11104/0291579