AI Article Synopsis
- The study examines how mercury (Hg) is transferred from female largemouth bass to their eggs, highlighting a potential health risk for developing embryos.
- Mercury levels in eggs from two of the studied waterbodies were found to exceed safe levels set by US regulations, indicating possible reproductive harm.
- The research reveals a complex relationship between mercury in female muscle tissue and eggs, with maternal transfer rates and egg-to-tissue mercury ratios being higher than previously documented in similar fish species.
Article Abstract
Maternal transfer of mercury in fish represents a potential route of elimination for adult females and a risk to developing embryos. To better quantify maternal transfer, we measured Hg in female largemouth bass (Micropterus salmoides) muscle and eggs from six waterbodies. Mercury in eggs from two waterbodies exceeded a US federal screening level (0.3 μg g(-1)) and was likely high enough to cause adverse reproductive effects. We found a curvilinear relationship between female and egg Hg. Fish with <0.37 μg g(-1) Hg had low levels of Hg in eggs; those with Hg >0.37 μg g(-1) showed a direct relationship between egg and muscle Hg (Log10 egg Hg = -1.03 + 1.18 * log10 muscle tissue Hg + 2.15 * (log10 muscle tissue Hg + 0.35)(2)). We also report higher maternal transfer (0.2-13.2%) and higher ratios of egg to muscle tissue Hg (4-52%) and egg to whole body Hg concentrations (7-116%) than previously observed for teleost fish.
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| http://dx.doi.org/10.1016/j.envpol.2013.03.046 | DOI Listing |
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