The effects of temperature on nickel bioaccumulation and toxicity to the freshwater snail, Lymnaea stagnalis
| dc.contributor.advisor | Crémazy, Anne | |
| dc.contributor.author | Mattsson, Megan | |
| dc.date.accessioned | 2023-10-12T15:16:58Z | |
| dc.date.available | 2023-10-12T15:16:58Z | |
| dc.date.issued | 2022-12 | |
| dc.description.abstract | Lymnaea stagnalis has been reported as the most sensitive freshwater species tested to date to chronic nickel (Ni) exposure. However, a wide range of Ni toxicity values have been observed for this species, in tests conducted at various temperatures from 18 to 26°C. This variability may be partially due to temperature effects on Ni bioaccumulation and toxicity. This research investigates temperature effects on chronic Ni bioaccumulation and toxicity to L. stagnalis. I assessed the effects of temperature and Ni on juvenile growth and survival over a 40-day toxicity test, and on Ni uptake and elimination rates in short-term tests. I observed an effect of temperature on juvenile growth and survival, with an optimum temperature of 27°C. Acute Ni toxicity was significantly exacerbated by an increase in temperature between 22 and 26°C, although this temperature change had limited effects on short-term Ni uptake and elimination rates, long-term bioaccumulation, and Ni-induced growth inhibition. Our results demonstrate that toxicity tests conducted at warmer temperatures may over-estimate Ni toxicity at colder temperatures, while guidelines based on those ran at 20°C may not be protective for snails exposed at higher temperatures. | |
| dc.description.copyright | © Megan Mattsson, 2022 | |
| dc.format.extent | xi, 57 | |
| dc.format.medium | electronic | |
| dc.identifier.uri | https://unbscholar.lib.unb.ca/handle/1882/37480 | |
| dc.language.iso | en | |
| dc.publisher | University of New Brunswick | |
| dc.rights | http://purl.org/coar/access_right/c_abf2 | |
| dc.subject.discipline | Biology | |
| dc.title | The effects of temperature on nickel bioaccumulation and toxicity to the freshwater snail, Lymnaea stagnalis | |
| dc.type | master thesis | |
| oaire.license.condition | other | |
| thesis.degree.discipline | Biology | |
| thesis.degree.grantor | University of New Brunswick | |
| thesis.degree.level | masters | |
| thesis.degree.name | M.Sc. |