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- W3138977479 abstract "Abstract The present study aimed at testing the potential role of the aquatic snake Helicops pastazae as indicators of water pollution by heavy metals. In particular, we tested whether the total heavy metal concentration is related to (1) the distance and position (upstream vs downstream) of the sampling point with the discharge of wastewater; (2) the taxonomic group studied and its place in the trophic chain: piscivorous snakes vs characid fish that co-occur with them; and (3) the organ or tissue examined: snake liver versus muscle. We quantified cadmium (Cd), chromium (Cr) and lead (Pb) by using atomic absorption spectrophotometry with electrothermal atomization. Significant differences were found between some of the sampling points, particularly high metal concentrations were detected upstream on point 1, but no clear spatial pattern was found. There were no significant differences in the concentration of any metal between fish and snake muscle, suggesting potential mechanisms of metal excretion in snakes. With regard to interactions, the snake liver had the highest concentrations of cadmium and the muscle of lead and chromium, which may indicate tissue affinity differences for certain metals. Altogether, our results indicate that H. pastazae differentially accumulates contaminants, depending on the tissue and location, which render them useful bioindicators of water contamination." @default.
- W3138977479 created "2021-03-29" @default.
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- W3138977479 date "2021-03-09" @default.
- W3138977479 modified "2023-09-27" @default.
- W3138977479 title "Heavy metal concentration in Neotropical Aquatic Snakes (Helicops pastazae) and its potential as a bioindicator of water pollution" @default.
- W3138977479 doi "https://doi.org/10.21203/rs.3.rs-291191/v1" @default.
- W3138977479 hasPublicationYear "2021" @default.
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