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Ontogenic delays in effects of nitrite exposure on tiger salamanders (Ambystoma tigrinum tigrinum) and wood frogs (Rana sylvatica).
| Content Provider | Semantic Scholar |
|---|---|
| Author | Griffis-Kyle, Kerry L. |
| Copyright Year | 2005 |
| Abstract | Under certain conditions, nitrite can be present in freshwater systems in quantities that are toxic to the fauna. I exposed wood frog (Rana sylvatica) and eastern tiger salamander (Ambystoma tigrinum tigrinum) embryos and young tadpoles and larvae to elevated concentrations of nitrite in chronic toxicity tests: 0, 0.3, 0.6, 1.2, 2.1, 4.6, and 6.1 mg/L NO2-N, exposing individuals as both embryos and larvae. Nitrite caused significant declines in wood frog hatching success (3.4 mg/L NO2-N, wood frog), and lower concentrations caused significant mortality during the early larval stages (4.6 mg/L NO2-N, salamander; 0.5 mg/L NO2-N, wood frog). Later tests exposing individuals to nitrite only after hatching showed that both wood frog and tiger salamander vulnerability to nitrite declined shortly after hatching. Hence, examining a single life-history stage, especially later in development, may miss critical toxic effects on organisms, causing the researcher potentially to underestimate seriously the ecological consequences of nitrite exposure. |
| File Format | PDF HTM / HTML |
| DOI | 10.1897/04-452R.1 |
| Alternate Webpage(s) | http://cedarcreek.umn.edu/biblio/fulltext/t1950.pdf |
| PubMed reference number | 16117132 |
| Alternate Webpage(s) | https://doi.org/10.1897/04-452R.1 |
| Journal | Medline |
| Volume Number | 24 |
| Issue Number | 6 |
| Journal | Environmental toxicology and chemistry |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
