The influence of lifestyle and swimming behavior on metabolic rate and thermal tolerance of twelve Amazon forest stream fish species

Journal of Thermal Biology
D F CamposV M F Almeida-Val

Abstract

The metabolism of fishes is profoundly affected by environmental factors such as temperature, oxygen concentration, and pH levels. Also, biotic elements, for instance, activity levels of species, have been suggested to affect the energy demand, driving their capacity to support environmental challenges. The present work aims to investigate the effects of the lifestyle and swimming activities levels of fishes living in Amazon forest stream on the aerobic metabolism and thermal tolerance. Intermittent flow respirometry was used to measure routine metabolic rate and thermal maximum metabolic rate with a thermal ramp methodology. Critical thermal tolerance, thermal aerobic scope, and thermal factorial aerobic scope were calculated for twelve species belonging to different families. Our findings showed a correlation between routine and thermal maximum metabolic rate and, between metabolic rate and activity levels. Species belonging to Characidae and Crenuchidae families have high resting metabolic rates, which decrease their factorial aerobic scope and reduce their abilities to cope with warming events. Therefore, these species have low thermal tolerance. Instead, species from families Rivulidae and Cichlidae showed opposite metabol...Continue Reading

Citations

Nov 15, 2018·Journal of Morphology·Jennifer S BigmanNicholas K Dulvy
Jun 6, 2019·Anais Da Academia Brasileira De Ciências·Adalberto Luis Val
May 20, 2020·Anais Da Academia Brasileira De Ciências·Adalberto L Val
Oct 3, 2019·Anais Da Academia Brasileira De Ciências·Adalberto Luis Val, Vivaldo DE Moura Neto
Sep 8, 2021·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Daiani KochhannLauren J Chapman

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