Different ecophysiological responses of freshwater fish to warming and acidification

Jesus, Tiago S.; Rosa, Inês C.; Repolho, Tiago; Lopes, Ana Rita; Pimentel, Marta S.; Almeida-Val, Vera Maria Fonseca de; Coelho, M. M.; Rosa, Rui

doi:10.1016/j.cbpa.2017.11.007

Cited by 20 publications

(18 citation statements)

References 46 publications

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“…Variations on the aerobic performance of organisms exposed to stressful conditions may reflect modifications of specific metabolic pathways that progressively lead to shifts in the energy production mode [9,[26][27][28][29][30][31][32][33][34]. When the aerobic metabolism per se cannot satisfy energy demands, the anaerobic energy production pathway has to be activated [35].…”

Section: Introductionmentioning

confidence: 99%

Seabream Larval Physiology under Ocean Warming and Acidification

Pimentel

Faleiro

Machado

et al. 2019

Fishes

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The vulnerability of early fish stages represents a critical bottleneck for fish recruitment; therefore, it is essential to understand how climate change affects their physiology for more sustainable management of fisheries. Here, we investigated the effects of warming (OW; +4 °C) and acidification (OA; ΔpH = 0.5) on the heart and oxygen consumption rates, metabolic enzymatic machinery—namely citrate synthase (CS), lactate dehydrogenase (LDH), and ß-hydroxyacyl CoA dehydrogenase (HOAD), of seabream (Sparus aurata) larvae (fifteen days after hatch). Oxygen consumption and heart rates showed a significant increase with rising temperature, but decreased with pCO2. Results revealed a significant increase of LDH activity with OW and a significant decrease of the aerobic potential (CS and HOAD activity) of larvae with OA. In contrast, under OA, the activity levels of the enzyme LDH and the LDH:CS ratio indicated an enhancement of anaerobic pathways. Although such a short-term metabolic strategy may eventually sustain the basic costs of maintenance, it might not be adequate under the future chronic ocean conditions. Given that the potential for adaptation to new forthcoming conditions is yet experimentally unaccounted for this species, future research is essential to accurately predict the physiological performance of this commercially important species under future ocean conditions.

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Section: Introductionmentioning

confidence: 99%

Seabream Larval Physiology under Ocean Warming and Acidification

Pimentel

Faleiro

Machado

et al. 2019

Fishes

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“…Water pH is another factor that has been shown to influence several physiological aspects of fish, either at gene expression and other biochemical levels (e.g. Jesus et al 2017;Xu et al 2017;Jesus et al 2018). Thus, water pH my act as a selective pressure, specifically an increased alkalinity (i.e.…”

Section: Functional and Structural Assessment Of Circadian-related Prmentioning

confidence: 99%

“…Previous studies have been conducted in fish species to understand the effects of extreme water pH on the internal homeostasis of the organisms (e.g. Xu et al 2013;Kavembe et al 2015;Jesus et al 2017;Xu et al 2017;Jesus et al 2018), but to our knowledge few studies related protein properties with changes in water pH (but see Jesus et al 2017).…”

Section: Functional and Structural Assessment Of Circadian-related Prmentioning

confidence: 99%

Adaptation and convergence in circadian-related genes in Iberian freshwater fish

Moreno

Sousa

Jesus

et al. 2019

Preprint

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The circadian clock is a biological timing system that improves the inherent ability of organisms to deal with environmental fluctuations. It is regulated by daily alternations of light but can also be affected by temperature. Fish, as ectothermic, have an increased dependence on the environmental temperature and thus are good models to study the integration of temperature within the circadian system. Here, we studied four species of freshwater fish of Squalius genus, distributed across a latitudinal gradient in Portugal with variable conditions of light and temperature. We identified and characterised the expected sixteen genes belonging to four main gene families (Cryptochromes, Period, CLOCK and BMAL) involved in the circadian system. We conducted phylogenetic analysis and tested these genes for the presence of signatures of selection based on dN/dS that revealed the presence of mutations under positive selection in nine genes. Furthermore, we analysed functional features of the proteins and found that these mutations alter protein isoelectric point and aliphatic index. Additionally, in 50% of the genes we found a pattern of convergence uncovered by the phylogenetic clustering of S. aradensis and S. pyrenaicus from Almargem, which inhabit basins with similar environmental conditions. Although this clustering can be explained by incomplete lineage sorting, evidence of positive selection in one gene in the two species and similar functional features in seven proteins are consistent with convergence at protein level. Our results highlight the importance of integrating sequence-based functional protein characterisation with dN/dS-based methods when studying the molecular adaptation of species.

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“…The predicted level of CO 2 values of 1,000 μatm by 2100 and μatm 1,900 by 2300 (Meehl et al, 2007) will result in detrimental effect to wide array of organisms including behavioural changes, impacts on neurosensory, mitochondrial function and metabolic rate. Now, it is realized that similar pattern of valuable information is lacking with freshwater system and its associated life forms (Ou et al 2015;Jesus et al 2018). This area of study is crucial as climate change and/or acidification are predicted to have adverse effects on the organisms in freshwater habitat (Jesus et al 2018) as this system is more sensitive to change in pH.…”

Section: Introductionmentioning

confidence: 99%

“…Now, it is realized that similar pattern of valuable information is lacking with freshwater system and its associated life forms (Ou et al 2015;Jesus et al 2018). This area of study is crucial as climate change and/or acidification are predicted to have adverse effects on the organisms in freshwater habitat (Jesus et al 2018) as this system is more sensitive to change in pH.…”

Section: Introductionmentioning

confidence: 99%

Effect of CO2 exposure on the antioxidant enzymes activity and gill histology of adult zebrafish (Danio rerio)

Thomas¹,

Achiraman²

2021

JUSST

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Increase in carbon dioxide level is considered as a threat to all living organisms and in particular aquatic organisms are vulnerable. Although a number of studies were carried out to predict the effect of increased CO2 with marine organisms, fresh water fish were the least concerned ones. Therefore, the aim of this study was to study the effect of antioxidant enzymes in zebrafish exposed to acute concentration of CO2 (based on prediction for 2300). Three ranges of pH were selected below the range where no fatality was observed, 6.0 – 6.5, 5.5 – 6.0 and 5.0 – 5.5. Antioxidant enzyme analysis of superoxide dismutase (SOD), catalase (CAT), lipid peroxidation (LP), glutathione reductase (GR) and glutathione peroxidase (GPx) was performed for the tissues, liver, gills and muscles. Although a significant decrease in SOD activity was observed in all three tissues, only a slight variation in CAT activity was found in all the tissues. MDA content which is an indicator of lipid peroxidation showed an increasing pattern in all the tissues. A slight increase in GR activity was found in all the tissues; however, a significant decrease in GPx activity was noted. Further, the histology of gills exposed to CO2 showed marked damage and injury including lamellar fusion and necrosis. Our study concludes that exposure to CO2 has led to oxidative stress which has resulted in cellular injury and damage

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Different ecophysiological responses of freshwater fish to warming and acidification

Cited by 20 publications

References 46 publications

Seabream Larval Physiology under Ocean Warming and Acidification

Seabream Larval Physiology under Ocean Warming and Acidification

Adaptation and convergence in circadian-related genes in Iberian freshwater fish

Effect of CO2 exposure on the antioxidant enzymes activity and gill histology of adult zebrafish (Danio rerio)

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