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- W2109753561 abstract "Toxic or noxious substances often serve as a means of chemical defense for numerous taxa. However, such compounds may also facilitate ecological or evolutionary processes. The neurotoxin, tetrodotoxin (TTX), which is found in newts of the genus Taricha, acts as a selection pressure upon predatory garter snakes, is a chemical cue to conspecific larvae, which elicits antipredator behavior, and may also affect macroinvertebrate foraging behavior. To understand selection patterns and how potential variation might affect ecological and evolutionary processes, it is necessary to quantify TTX levels within individuals and populations. To do so has often required that animals be destructively sampled or removed from breeding habitats and brought into the laboratory. Here we demonstrate a non-destructive method of sampling adult Taricha that obviates the need to capture and collect individuals. We also show that embryos from oviposited California newt (Taricha torosa) egg masses can be individually sampled and TTX quantified from embryos. We employed three different extraction techniques to isolate TTX. Using a custom fabricated high performance liquid chromatography (HPLC) system we quantified recovery of TTX. We found that a newly developed micro-extraction technique significantly improved recovery compared to previously used methods. Results also indicate our improvements to the HPLC method have high repeatability and increased sensitivity, with a detection limit of 48 pg (0.15 pmol) TTX. The quantified amounts of TTX in adult newts suggest fine geographic variation in toxin levels between sampling localities isolated by as little as 3 km." @default.
- W2109753561 created "2016-06-24" @default.
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- W2109753561 date "2014-03-01" @default.
- W2109753561 modified "2023-10-16" @default.
- W2109753561 title "Quantifying tetrodotoxin levels in the California newt using a non-destructive sampling method" @default.
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- W2109753561 doi "https://doi.org/10.1016/j.toxicon.2014.01.009" @default.
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