Synergistic effects of acute warming and low pH on cellular stress responses of the gilthead seabream Sparus aurata

Feidantsis, Konstantinos; Pörtner, Hans‐Otto; Antonopoulou, Efthimia; Michaelidis, Basile

doi:10.1007/s00360-014-0875-3

Cited by 40 publications

(44 citation statements)

References 100 publications

(108 reference statements)

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“…Numerous studies suggest that exposure to elevated CO 2 enhances the responsiveness of marine organisms to thermal stress and vice versa [74–76]. However, our data did not reveal such a synergistic or additive interaction at the molecular level.…”

Section: Discussioncontrasting

confidence: 89%

Contrasting impacts of ocean acidification and warming on the molecular responses of CO2-resilient oysters

2017

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BackgroundThis study characterises the molecular processes altered by both elevated CO2 and increasing temperature in oysters. Differences in resilience of marine organisms against the environmental stressors associated with climate change will have significant implications for the sustainability of coastal ecosystems worldwide. Some evidence suggests that climate change resilience can differ between populations within a species. B2 oysters represent a unique genetic resource because of their capacity to better withstand the impacts of elevated CO2 at the physiological level, compared to non-selected oysters from the same species (Saccostrea glomerata). Here, we used proteomic and transcriptomic analysis of gill tissue to evaluate whether the differential response of B2 oysters to elevated CO2 also extends to increased temperature.ResultsSubstantial and distinctive effects on protein concentrations and gene expression were evident among B2 oysters responding to elevated CO2 or elevated temperature. The combination of both stressors also altered oyster gill proteomes and gene expression. However, the impacts of elevated CO2 and temperature were not additive or synergistic, and may be antagonistic.ConclusionsThe data suggest that the simultaneous exposure of CO2-resilient oysters to near-future projected ocean pH and temperature results in complex changes in molecular processes in order to prevent stress-induced cellular damage. The differential response of B2 oysters to the combined stressors also indicates that the addition of thermal stress may impair the resilience of these oysters to decreased pH. Overall, this study reveals the intracellular mechanisms that might enable marine calcifiers to endure the emergent, adverse seawater conditions resulting from climate change.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-017-3818-z) contains supplementary material, which is available to authorized users.

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Section: Discussioncontrasting

confidence: 89%

Contrasting impacts of ocean acidification and warming on the molecular responses of CO2-resilient oysters

2017

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“…Focusing on water acidification, an annual decrease of 0.004 pH units has been estimated for the western Mediterranean, reaching a pH of approximately 7.4 in 2100 [ 37 ]. A slight influence of decreases of water pH has been reported on gilthead sea bream [ 72 ] and S. chrysophrii (present study), suggesting that both organisms would tolerate pH variations predicted to date. However, synergic effects of pH reduction with other factors should be explored for S. chrysophrii , since deleterious effects have been reported for gilthead sea bream in acidified sea water combined with temperature [ 72 ].…”

Section: Discussionsupporting

confidence: 66%

“…A slight influence of decreases of water pH has been reported on gilthead sea bream [ 72 ] and S. chrysophrii (present study), suggesting that both organisms would tolerate pH variations predicted to date. However, synergic effects of pH reduction with other factors should be explored for S. chrysophrii , since deleterious effects have been reported for gilthead sea bream in acidified sea water combined with temperature [ 72 ]. In relation to salinity, an increment of up to 0.5 ppt has been predicted for the next 100 years in the Mediterranean Sea [ 9 ].…”

Section: Discussionsupporting

confidence: 66%

Come rain or come shine: environmental effects on the infective stages of Sparicotyle chrysophrii, a key pathogen in Mediterranean aquaculture

Villar-Torres¹,

Montero²,

Raga³

et al. 2018

Parasites Vectors

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BackgroundEvidence concerning the environmental influence on monogenean transmission and infection processes is widely accepted, although only the effects of a limited number of abiotic factors on particular monogenean species have been explored. The current context of climate change calls for further research both on this subject, and also that concerning monogenean hosts, especially in aquaculture.MethodsIn this study, four experiments were used to assess the response of the infective stages of Sparicotyle chrysophrii, a pathogenic monogenean from gilthead sea bream (Sparus aurata) cultures in the Mediterranean, to variations of temperature (from 10 °C to 30 °C), pH (7.0 and 7.9), photoperiod (LD 12:12, LD 0:24 and LD 24:0) and salinity (from 27 ppt to 47 ppt).ResultsThermal variations cause the strongest responses among the infective stages of S. chrysophrii, which reduced development and survival times as temperature increased. The optimal thermal range for maximum hatching success was found between 14 and 22 °C, whereas temperatures of 10 and 30 °C probably represent biological thermal limits. Reductions of development time and hatching rates were recorded at the lowest pH level, but hatching success remained above 50%, suggesting a certain degree of tolerance to slight pH variations. Photoperiod acts as an environmental cue synchronising the circadian hatching rhythm of S. chrysophrii with the first four hours of darkness. Response to a wide range of salinities was negligible, suggesting a high tolerance to variations of this abiotic factor.ConclusionsLarval development and hatching of S. chrysophrii are modulated according to environmental factors, mainly temperature, thus parasite-host coordination and successful infections are enhanced. Therefore, abiotic factors should be broadly considered to design treatments against this monogenean. The high tolerance to the predicted environmental variations over the next century reported for gilthead sea bream and herein exposed for S. chrysophrii suggests that neither will be notably affected by climate change in the western Mediterranean region.Electronic supplementary materialThe online version of this article (10.1186/s13071-018-3139-3) contains supplementary material, which is available to authorized users.

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“…At 20 days of fasting (200 °C d), the manifested decrease of plasma lactate might be related to the maintenance of basal glucose levels, which has also been observed in other fasted fish (Soengas et al 1996;Sangiao-Alvarellos et al 2005). LDH activity is associated with glucose anaerobic oxidation and used as biomarker for heat stress in fish (Feidantsis et al 2015). Elevated activity of this enzyme can indicate hepatic, renal, or muscular damage, and this effect can be related to stress stimulus like fasting (Peres et al 2014).…”

Section: Morphometric Measurements and Gastric Phmentioning

confidence: 75%

Physio-metabolic response of rainbow trout during prolonged food deprivation before slaughter

Bermejo‐Poza

Fernández-Muela

Fuente

et al. 2018

Fish Physiol Biochem

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Fish normally undergo periods of food deprivation that are longer than non-hibernating mammals. In aquacultured rainbow trout (Oncorhynchus mykiss), it is unclear how fasting may affect their physiological adaptative response, especially when they are normally fed daily. In addition, that response may vary with temperature, making it necessary to express fasting duration in terms of degree days. In the current study, trout were fasted for 5, 10, and 20 days (55, 107, and 200 degree days (°C d), respectively). To assess the physiological response of fish to fasting, different biometric, blood, plasma, and metabolic parameters were measured, as well as liver fatty acid composition. The fish weight, condition factor, and the hepato-somatic index of 5-day fasted trout were not significantly different from those of control fish. Gastric pH increased as fasting progressed while plasma concentrations of glucose, triglycerides, and total proteins decreased significantly after 10 days of fasting, while the percentage of non-esterified fatty acids increased. There were no significant differences in plasma ions (sodium, potassium, and calcium), except for chloride ion which decreased after 5 days of fasting. Liver glycogen decreased after 5 days of fasting while glycogen concentration in muscle did not decrease until 20 days of fasting. Liver color presented a higher chroma after 5 days of fasting, suggesting a mobilization of reserves. Finally, acetylcholinesterase activity in the brain was not affected by food deprivation but increased after 10 days of fasting in liver and muscle, suggesting the mobilization of body reserves, but without severely affecting basal metabolism.

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Synergistic effects of acute warming and low pH on cellular stress responses of the gilthead seabream Sparus aurata

Cited by 40 publications

References 100 publications

Contrasting impacts of ocean acidification and warming on the molecular responses of CO2-resilient oysters

Contrasting impacts of ocean acidification and warming on the molecular responses of CO2-resilient oysters

Come rain or come shine: environmental effects on the infective stages of Sparicotyle chrysophrii, a key pathogen in Mediterranean aquaculture

Physio-metabolic response of rainbow trout during prolonged food deprivation before slaughter

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