Please use this identifier to cite or link to this item:
Title: Differential survivorship of congeneric ornamental fishes under forecasted climate changes are related to anaerobic potential
Authors: Gonçalves, Luciana Mara Fé
Silva, Maria de Nazaré Paula da
Val, Adalberto Luis
Val, Vera Maria Fonseca Almeida e
Keywords: Carbon Dioxide
Lactate Dehydrogenase
Anaerobic Glycolysis
Climate Change
Controlled Study
Environmental Exposure
Environmental Temperature
Enzyme Activity
Gene Activation
Gene Expression
Ornamental Fish
Paracheirodon Axelrodi
Paracheirodon Simulans
Issue Date: 2018
metadata.dc.publisher.journal: Genetics and Molecular Biology
metadata.dc.relation.ispartof: Volume 41, Número 1, Pags. 107-118
Abstract: 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 ex-treme), 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. © 2018, Sociedade Brasileira de Genética.
metadata.dc.identifier.doi: 10.1590/1678-4685-gmb-2017-0016
Appears in Collections:Artigos

Files in This Item:
File Description SizeFormat 
artigo-inpa.pdf290,94 kBAdobe PDFThumbnail

This item is licensed under a Creative Commons License Creative Commons