AI Article Synopsis
- Glyphosate-based herbicides, including Roundup Express® and adjuvants like POEAs, were studied for their effects on oysters over a 35-day period with varying concentrations.
- Low mortality rates were noted, with only minor differences in shell length, but significant variations in biomarker responses indicated differing impacts based on chemical type and concentration.
- The study suggests that prolonged exposure to low environmental concentrations of these herbicides could potentially harm oysters, especially in terms of reproduction and oxidative stress.
Article Abstract
Glyphosate-based herbicides include active matter and adjuvants (e.g. polyethoxylated tallow amines, POEAs). In addition to a previous investigation on the effect of glyphosate on oysters, the aim of the present study was to investigate the effects of sub-chronic exposures (35days) to three concentrations (0.1, 1 and 100μgL) of Roundup Express® (R) and POEAs on oysters belonging to the same age group. Low mortality rates were calculated, and only few significant differences (i.e. shell length) between exposure conditions were observed at a given date. However, when comparing the biomarker's temporal variations, some different patterns (e.g. condition index, reproduction, parameters of oxidative stress) were observed depending on the molecules and concentrations. These results suggest that a longer exposure to an environmental concentration (0.1μgL) of R and POEAs could induce harmful effects on oysters.
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| http://dx.doi.org/10.1016/j.marpolbul.2017.02.028 | DOI Listing |
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