| Revista: | Genetics and molecular biology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000417953 |
| ISSN: | 1415-4757 |
| Autores: | Gonçalves, Luciana Mara Fe1 Silva, Maria de Nazare Paula da1 Val, Adalberto Luis2 Almeida-Val, Vera Maria Fonseca de2 |
| Instituciones: | 1Instituto Nacional de Pesquisas da Amazonia, Laboratorio de Ecofisiologia e Evolucao Molecular, Manaus, Amazonas. Brasil 2Universidade Nilton Lins, Programa de Pos-Graduacao em Aquicultura, Manaus, Amazonas. Brasil |
| Año: | 2018 |
| Periodo: | Mar |
| Volumen: | 41 |
| Número: | 1 |
| Paginación: | 107-118 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | Two Amazonian closely related tetras – cardinal Paracheirodon axelrodi and green neon P. simulans – were artificially acclimatized to environmental chambers mimicking future climate change scenarios (mild, moderate and extreme), using a microcosm facility. P. simulans survived (100%) to all scenarios after 30 days exposure, while P. axelrodi presented decreasing survival percentages according to environmental severity. These differences may be the reflection of distinct natural acclimatization to microhabitats between the species, which differ in thermal conditions. Survival responses might be related to differences in relative gene expression of lactate dehydrogenase (Ldh), suggesting that P. axelrodi anaerobic potential is lower or non-existent compared to P. simulans, not tolerating long-term thermal challenges. Accordingly, increases in temperature and in CO2 levels caused increases in energy demand and resulted in activation of the anaerobic pathway, as demonstrated by the higher enzyme levels measured in head and tail portions of both species. Sustained anaerobic glycolysis is possible when fish live in challenging environments (low oxygen or high temperature). Our results clearly show that P. simulans has a larger scope for survival to higher energy demands due to its increased anaerobic potential compared to P. axelrodi |
| Disciplinas: | Biología, Química |
| Palabras clave: | Peces, Genética, Bioquímica, Peces ornamentales, Actividad enzimática, Expresión génica relativa, Escenarios del IPCC, Lactato deshidrogenasa |
| Keyword: | Fish, Genetics, Biochemistry, Ornamental fish, Enzymatic activity, Relative gene expression, IPCC scenarios, Lactate dehydrogenase |
| Texto completo: | Texto completo (Ver PDF) |
