The effects of temperature and pH on the embryonic development of two species of Triturus (Caudata: Salamandridae)
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Abstract
Amphibian populations are especially sensitive to aquatic parameters, in particular during embryonic and larval life. Our aim was to test for an effect of temperature (T = 13°C, 20°C and 25°C at constant pH = 7) and pH (pH = 5.5, 7 and 8.5 at constant T= 20°C) on embryos of two species of Triturus, T. carnifex carnifex and T. italicus (Amphibia, Salamandridae) using GLM procedure. Trend of embryogenesis processes, time to hatching and rate of development have a similar effect in both species in the used range of temperature and pH. Time to hatching decreased significantly with the increasing temperature. The pH experimental conditions had no effect on T. carnifex embryos survival, while the acidic pH condition raised the mortality rate in T. italicus, whose embryos should be more vulnerable than those of T. carnifex to acidification in nature.
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The effects of temperature and pH on the embryonic development of two species of Triturus (Caudata: Salamandridae)
In: Amphibia-ReptiliaSearch for other papers by Manuela D'Amen in
Current site
Google Scholar
PubMed
Search for other papers by Leonardo Vignoli in
Current site
Google Scholar
PubMed
Search for other papers by Marco Bologna in
Current site
Google Scholar
PubMed
Abstract
Amphibian populations are especially sensitive to aquatic parameters, in particular during embryonic and larval life. Our aim was to test for an effect of temperature (T = 13°C, 20°C and 25°C at constant pH = 7) and pH (pH = 5.5, 7 and 8.5 at constant T= 20°C) on embryos of two species of Triturus, T. carnifex carnifex and T. italicus (Amphibia, Salamandridae) using GLM procedure. Trend of embryogenesis processes, time to hatching and rate of development have a similar effect in both species in the used range of temperature and pH. Time to hatching decreased significantly with the increasing temperature. The pH experimental conditions had no effect on T. carnifex embryos survival, while the acidic pH condition raised the mortality rate in T. italicus, whose embryos should be more vulnerable than those of T. carnifex to acidification in nature.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 322 | 0 | 0 |
| Full Text Views | 245 | 76 | 0 |
| PDF Views & Downloads | 263 | 98 | 2 |
