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Huang T, Gu W, Liu E, Wang B, Wang G, Dong F, Guo F, Jiao W, Sun Y, Wang X, Li S, Xu G. miR-301b-5p and its target gene nfatc2ip regulate inflammatory responses in the liver of rainbow trout (Oncorhynchus mykiss) under high temperature stress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 242:113915. [PMID: 35901591 DOI: 10.1016/j.ecoenv.2022.113915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/18/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Rainbow trout (Oncorhynchus mykiss) is a typical cold-water aquaculture fish and a high-end aquatic product. When water temperature exceeds its optimal range of 12-18 °C, the immune system of rainbow trout becomes weakened and unbalanced. High temperature in summer and global warming severely impact rainbow trout industry. The focus of this study was to explore the mechanisms regulating the immune response of rainbow trout under high temperature stress and identify molecular elements that account for resistance to high temperature. In this study, individual fish were screened in a high temperature stress experiment and divided into resistant (R) and sensitive (S) groups. The hepatic transcriptome sequencing and analysis of mRNAs and microRNAs of the R, S, and control groups showed that the number of the differentially expressed genes (DEGs) in the S group (9259) was higher than that in the R group (5313). Furthermore, the 1233 genes differentially expressed between S and R groups were mainly enriched in immune-related pathways, including cytokine-cytokine receptor interaction, TNF signaling and IL-17 signaling. Among these DEGs were miR-301b-5p and its target gene that encodes nuclear factor of activated T cells two interacting protein (nfatc2ip). The dual-luciferase reporter system and immunofluorescence experiments verified the relationship between miR-301b-5p and nfatc2ip. We also showed that expression levels of miR-301b-5p and nfatc2ip significantly negatively correlated in the liver of rainbow trout under high temperature stress. By performing functional experiments, we showed that activation of miR-301b-5p expression or inhibition of nfatc2ip expression stimulated the phosphorylation of p65, p38, and JNK in the classical nuclear factor kappa-B and mitogen-activated protein kinase pathways under high temperature stress. These manipulations initially promoted the secretion of the pro-inflammatory factor IL-1β and then increased the levels of IL-6, IL-12, and TNF-α. In addition, activation of miR-301b-5p expression or inhibition of nfatc2ip expression stimulated the repair of the hepatic ultrastructural damage caused by high temperature stress by activating the inflammatory response in rainbow trout liver.
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Affiliation(s)
- Tianqing Huang
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Wei Gu
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Enhui Liu
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Bingqian Wang
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Gaochao Wang
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Fulin Dong
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Fuyuan Guo
- Yantai Jinghai Marine Fishery Co Ltd, Yantai, PR China
| | - Wenlong Jiao
- Gansu Fisheries Research Institute, Lanzhou, PR China
| | - Yanchun Sun
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China
| | - Xiance Wang
- Hangzhou Qiandaohu Xun Long Sci-tech CO., LTD, Hangzhou, PR China
| | - Shanwei Li
- Department of Food Science and Engineering, College of Food Science and Technology, Shanghai Ocean University, Shanghai, PR China
| | - Gefeng Xu
- Cold Water Fish Industry Technology Innovation Strategic Alliance, Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin, PR China.
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Pettinau L, Lancien F, Zhang Y, Mauduit F, Ollivier H, Farrell AP, Claireaux G, Anttila K. Warm, but not hypoxic acclimation, prolongs ventricular diastole and decreases the protein level of Na +/Ca 2+ exchanger to enhance cardiac thermal tolerance in European sea bass. Comp Biochem Physiol A Mol Integr Physiol 2022; 272:111266. [PMID: 35772648 DOI: 10.1016/j.cbpa.2022.111266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 06/24/2022] [Accepted: 06/24/2022] [Indexed: 10/17/2022]
Abstract
One of the physiological mechanisms that can limit the fish's ability to face hypoxia or elevated temperature, is maximal cardiac performance. Yet, few studies have measured how cardiac electrical activity and associated calcium cycling proteins change with acclimation to those environmental stressors. To examine this, we acclimated European sea bass for 6 weeks to three experimental conditions: a seasonal average temperature in normoxia (16 °C; 100% air sat.), an elevated temperature in normoxia (25 °C; 100% air sat.) and a seasonal average temperature in hypoxia (16 °C; 50% air sat.). Following each acclimation, the electrocardiogram was measured to assess how acclimation affected the different phases of cardiac cycle, the maximal heart rate (fHmax) and cardiac thermal performance during an acute increase of temperature. Whereas warm acclimation prolonged especially the diastolic phase of the ventricular contraction, reduced the fHmax and increased the cardiac arrhythmia temperature (TARR), hypoxic acclimation was without effect on these functional indices. We measured the level of two key proteins involved with cellular relaxation of cardiomyocytes, i.e. sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA) and Na+/Ca2+ exchanger (NCX). Warm acclimation reduced protein level of both NCX and SERCA and hypoxic acclimation reduced SERCA protein levels without affecting NCX. The changes in ventricular NCX level correlated with the observed changes in diastole duration and fHmax as well as TARR. Our results shed new light on mechanisms of cardiac plasticity to environmental stressors and suggest that NCX might be involved with the observed functional changes, yet future studies should also measure its electrophysiological activity.
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Affiliation(s)
- Luca Pettinau
- Department of Biology, University of Turku, 20014 Turku, Finland.
| | - Frédéric Lancien
- Université de Bretagne Occidentale, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Yangfan Zhang
- Department of Zoology, Faculty of Land and Food System, University of British Columbia, Vancouver, British Columbia, Canada. https://twitter.com/theYangfanZHANG
| | - Florian Mauduit
- Université de Bretagne Occidentale, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Hélène Ollivier
- Université de Bretagne Occidentale, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Anthony P Farrell
- Department of Zoology, Faculty of Land and Food System, University of British Columbia, Vancouver, British Columbia, Canada
| | - Guy Claireaux
- Université de Bretagne Occidentale, CNRS, IRD, Ifremer, LEMAR, F-29280 Plouzané, France
| | - Katja Anttila
- Department of Biology, University of Turku, 20014 Turku, Finland. https://twitter.com/anttilaLab
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3
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Papadopoulou A, Pettinau L, Seppänen E, Sikanen A, Anttila K. The interactive effects of exercise training and functional feeds on the cardiovascular performance of rainbow trout (Oncorhynchus mykiss) at high temperatures. Curr Res Physiol 2022; 5:142-150. [PMID: 35252881 PMCID: PMC8889263 DOI: 10.1016/j.crphys.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 11/25/2022] Open
Abstract
The cardiovascular performance of salmonids in aquaculture can be impaired by acute climate warming, posing risks for fish survival. Exercise training and functional feeds have been shown to be cardioprotective in mammals but their action on the fish heart and its upper thermal performance has not been studied. To investigate this, rainbow trout were trained at a moderate water velocity of 1 body length per second (bl s−1) for 6 h per day, either alone or in combination with one of two functional feed-supplements, allicin and fucoidan. After 6 weeks of exercise training and feeding, maximum heart rate and the temperature coefficient of heart rate were significantly higher in the trained fish as compared to untrained ones. There was a slight increase in hematocrit in trained control fish reared on a normal diet (TC group) compared to untrained fish fed with the same diet (CC). This implies that exercise training enhanced oxygen delivery to trout tissues via an increase of cardiac blood flow in warm water. However, cardiac thermal tolerance was not affected by exercise training or feeding, except from the temperature of peak heart rate which was higher in the trained group fed with fucoidan supplement (TF) as compared to the untrained group fed with same diet (CF). Allicin supplement caused a significant reduction in the maximum heart rate and the temperature coefficient of heart rate, especially in trained fish, while fucoidan supplement did not cause any effect on heart rate. No differences were observed in growth performance among groups. However, fish fed with fucoidan-supplemented diet had a slight reduction in feed conversion efficiency. We suggest further investigations to understand the antagonistic effect of allicin supplemental feeding and exercise training on cardiovascular performance. More studies are also required to investigate if other exercise training intensities could increase cardiac thermal tolerance. Exercise training at 1 bl s−1 increased the hematocrit values of rainbow trout. Exercise training at 1 bl s−1 increased the maximum heart rate and temperature coefficient of rainbow trout. Exercise training at 1bl s−1 did not enhance the cardiac thermal tolerance of rainbow trout. Functional feeds, allicin and fucoidan, did not improve the cardiovascular system of rainbow trout at high temperatures.
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McKenzie DJ, Zhang Y, Eliason EJ, Schulte PM, Claireaux G, Blasco FR, Nati JJH, Farrell AP. Intraspecific variation in tolerance of warming in fishes. JOURNAL OF FISH BIOLOGY 2021; 98:1536-1555. [PMID: 33216368 DOI: 10.1111/jfb.14620] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/09/2020] [Accepted: 11/17/2020] [Indexed: 05/12/2023]
Abstract
Intraspecific variation in key traits such as tolerance of warming can have profound effects on ecological and evolutionary processes, notably responses to climate change. The empirical evidence for three primary elements of intraspecific variation in tolerance of warming in fishes is reviewed. The first is purely mechanistic that tolerance varies across life stages and as fishes become mature. The limited evidence indicates strongly that this is the case, possibly because of universal physiological principles. The second is intraspecific variation that is because of phenotypic plasticity, also a mechanistic phenomenon that buffers individuals' sensitivity to negative impacts of global warming in their lifetime, or to some extent through epigenetic effects over successive generations. Although the evidence for plasticity in tolerance to warming is extensive, more work is required to understand underlying mechanisms and to reveal whether there are general patterns. The third element is intraspecific variation based on heritable genetic differences in tolerance, which underlies local adaptation and may define long-term adaptability of a species in the face of ongoing global change. There is clear evidence of local adaptation and some evidence of heritability of tolerance to warming, but the knowledge base is limited with detailed information for only a few model or emblematic species. There is also strong evidence of structured variation in tolerance of warming within species, which may have ecological and evolutionary significance irrespective of whether it reflects plasticity or adaptation. Although the overwhelming consensus is that having broader intraspecific variation in tolerance should reduce species vulnerability to impacts of global warming, there are no sufficient data on fishes to provide insights into particular mechanisms by which this may occur.
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Affiliation(s)
- David J McKenzie
- MARBEC, University of Montpellier, CNRS, IFREMER, IRD, Montpellier, France
| | - Yangfan Zhang
- Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Patricia M Schulte
- Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Guy Claireaux
- Université de Bretagne Occidentale, LEMAR (UMR 6539), Centre Ifremer de Bretagne, Plouzané, France
| | - Felipe R Blasco
- Department of Physiological Sciences, Federal University of São Carlos, São Carlos, Brazil
- Joint Graduate Program in Physiological Sciences, Federal University of São Carlos - UFSCar/São Paulo State University, UNESP Campus Araraquara, Araraquara, Brazil
| | - Julie J H Nati
- MARBEC, University of Montpellier, CNRS, IFREMER, IRD, Montpellier, France
| | - Anthony P Farrell
- Department of Zoology, University of British Columbia, Vancouver, British Columbia, Canada
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada
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Ackerly KL, Esbaugh AJ. The effects of temperature on oil-induced respiratory impairment in red drum (Sciaenops ocellatus). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2021; 233:105773. [PMID: 33610857 DOI: 10.1016/j.aquatox.2021.105773] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
The 2010 Deepwater Horizon (DWH) crude oil spill, among the largest environmental disasters in U.S. history, affected numerous economically important fishes. Exposure to crude oil can lead to reduced cardiac function, limiting oxygen transport, ATP production, and aerobic performance. However, crude oil exposure is not the only stressor that affects aerobic performance, and increasing environmental temperatures are known to significantly increase metabolic demands in fishes. As the DWH spill was active during warm summer months in the Gulf of Mexico, it is important to understand the combined effects of oil and temperature on a suite of metabolic parameters. Therefore, we investigated the effects of 24h crude oil exposure on the aerobic metabolism and hypoxia tolerance of red drum (Sciaenops ocellatus) following 3 week chronic exposure to four ecologically relevant temperatures (18 °C, 22 °C, 25 °C, 28 °C). Our results show that individuals acclimated to higher temperatures had significantly higher standard metabolic rate than individuals at lower temperatures, which resulted in significantly decreased critical oxygen threshold and reduced recovery from exercise. As predicted, crude oil exposure resulted in lower maximum metabolic rates (MMR) across the temperature range, and a significantly reduced ability to recover from exercise. The lowest temperature acclimation showed the smallest effect of oil on MMR, while the highest temperature showed the smallest effect on exercise recovery. Reduced respiratory performance and hypoxia tolerance are likely to have meaningful impacts on the fitness of red drum, especially with climate-induced temperature increases and continued oil exploration in the Gulf of Mexico.
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Affiliation(s)
- Kerri Lynn Ackerly
- The University of Texas at Austin Marine Science Institute, 750 Channel View Drive, Port Aransas, TX 78373, United States.
| | - Andrew J Esbaugh
- The University of Texas at Austin Marine Science Institute, 750 Channel View Drive, Port Aransas, TX 78373, United States.
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Aimon C, Lebigre C, Le Bayon N, Le Floch S, Claireaux G. Effects of dispersant treated oil upon exploratory behaviour in juvenile European sea bass (Dicentrarchus labrax). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111592. [PMID: 33396115 DOI: 10.1016/j.ecoenv.2020.111592] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 06/12/2023]
Abstract
Accidental spills are pervasive pollution in aquatic ecosystems. Resorting to chemical dispersant is one of the most implemented strategies in response to oil spills, but it results in an increase in the bio-availability of oil compounds known to disturb fish neurosensory capacities and hence fish habitat use. While it has become well established that acute oil exposure can cause a range of physiological defects, sub-lethal consequences on animal behaviour have only received recent attention. Here we investigated the effect of an exposure to a 62 h- dispersant treated oil on the exploration tendency (exploratory activity, and avoidance of unfamiliar open areas) of juvenile European sea bass. Three different concentrations of chemically dispersed oil were tested, low and medium conditions bracketing the range of likely situations that fish encounter following an oil spill, the high dose representing a more severe condition. Fish recovery capacities were also evaluated during 2 weeks post-exposure. Our results suggest a dose-response relationship; the low dose (0.048 ± 0.007 g L-1 of total petroleum hydrocarbons ([TPH])) had no effect on sea bass behavioural response to a novel environment while medium (0.243 ± 0.012 g L-1 [TPH]) and high (0.902 ± 0.031 g L-1 [TPH]) doses altered fish exploratory activity and their typical avoidance of unfamiliar open areas. Our experiment also suggest signs of recovery capacities in the first 10 days following oil exposure even if fish might need more time to fully recover from observed alterations. We discuss the possibility that observed alterations may result from a neurosensory or physiological known defects of oil exposure, causing anaesthetic-like sedative behaviours. Altogether, this study shows that juvenile sea bass exposed to oil spill exhibit transient behavioural impairments that may have major population-level consequences given the high mortality experienced by juveniles.
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Affiliation(s)
- Cassandre Aimon
- Université de Bretagne Occidentale, LEMAR (UMR 6539), Centre Ifremer de Bretagne, 29280 Plouzané, France; CEDRE, Research Department, 715 rue Alain Colas, CS 41836, Brest 29218-Cedex 2, France.
| | - Christophe Lebigre
- Ifremer, Fisheries Science and Technology Unit (STH/LBH), Centre Ifremer de Bretagne, 29280 Plouzané, France
| | - Nicolas Le Bayon
- Ifremer, LEMAR (UMR 6539), Cezon crude oil impacts the developing hearts of large predntre Ifremer de Bretagne, 29280 Plouzané, France
| | - Stéphane Le Floch
- CEDRE, Research Department, 715 rue Alain Colas, CS 41836, Brest 29218-Cedex 2, France
| | - Guy Claireaux
- Université de Bretagne Occidentale, LEMAR (UMR 6539), Centre Ifremer de Bretagne, 29280 Plouzané, France
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7
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Skeeles MR, Winkler AC, Duncan MI, James NC, van der Walt KA, Potts WM. The use of internal heart rate loggers in determining cardiac breakpoints of fish. J Therm Biol 2020; 89:102524. [DOI: 10.1016/j.jtherbio.2020.102524] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/13/2020] [Accepted: 01/19/2020] [Indexed: 11/15/2022]
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Howald S, Cominassi L, LeBayon N, Claireaux G, Mark FC. Future ocean warming may prove beneficial for the northern population of European seabass, but ocean acidification will not. ACTA ACUST UNITED AC 2019; 222:jeb.213017. [PMID: 31624098 DOI: 10.1242/jeb.213017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 10/01/2019] [Indexed: 12/26/2022]
Abstract
The world's oceans are acidifying and warming as a result of increasing atmospheric CO2 concentrations. The thermal tolerance of fish greatly depends on the cardiovascular ability to supply the tissues with oxygen. The highly oxygen-dependent heart mitochondria thus might play a key role in shaping an organism's tolerance to temperature. The present study aimed to investigate the effects of acute and chronic warming on the respiratory capacity of European sea bass (Dicentrarchus labrax L.) heart mitochondria. We hypothesized that acute warming would impair mitochondrial respiratory capacity, but be compensated for by life-time conditioning. Increasing P CO2 may additionally cause shifts in metabolic pathways by inhibiting several enzymes of the cellular energy metabolism. Among other shifts in metabolic pathways, acute warming of heart mitochondria of cold life-conditioned fish increased leak respiration rate, suggesting a lower aerobic capacity to synthesize ATP with acute warming. However, thermal conditioning increased mitochondrial functionality, e.g. higher respiratory control ratios in heart mitochondria of warm life-conditioned compared with cold life-conditioned fish. Exposure to high P CO2 synergistically amplified the effects of acute and long-term warming, but did not result in changes by itself. This high ability to maintain mitochondrial function under ocean acidification can be explained by the fact that seabass are generally able to acclimate to a variety of environmental conditions. Improved mitochondrial energy metabolism after warm conditioning could be due to the origin of this species in the warm waters of the Mediterranean. Our results also indicate that seabass are not yet fully adapted to the colder temperatures in their northern distribution range and might benefit from warmer temperatures in these latitudes.
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Affiliation(s)
- Sarah Howald
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Integrative Ecophysiology, 27570 Bremerhaven, Germany .,Institute of Marine Ecosystem and Fisheries Science, Center for Earth System Research and Sustainability (CEN), University of Hamburg, 22767 Hamburg, Germany
| | - Louise Cominassi
- Institute of Marine Ecosystem and Fisheries Science, Center for Earth System Research and Sustainability (CEN), University of Hamburg, 22767 Hamburg, Germany
| | - Nicolas LeBayon
- Ifremer, LEMAR (UMR 6539), Laboratory of Adaptation, and Nutrition of Fish, Centre Ifremer de Bretagne, 29280 Plouzané, France
| | - Guy Claireaux
- Ifremer, LEMAR (UMR 6539), Laboratory of Adaptation, and Nutrition of Fish, Centre Ifremer de Bretagne, 29280 Plouzané, France.,Université de Bretagne Occidentale, LEMAR (UMR 6539), 29280 Plouzané, France
| | - Felix C Mark
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Integrative Ecophysiology, 27570 Bremerhaven, Germany
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Mager EM, Pasparakis C, Stieglitz JD, Hoenig R, Morris JM, Benetti DD, Grosell M. Combined effects of hypoxia or elevated temperature and Deepwater Horizon crude oil exposure on juvenile mahi-mahi swimming performance. MARINE ENVIRONMENTAL RESEARCH 2018; 139:129-135. [PMID: 29778443 DOI: 10.1016/j.marenvres.2018.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 04/30/2018] [Accepted: 05/04/2018] [Indexed: 06/08/2023]
Abstract
This study examined potential interactive effects of co-exposure to Deepwater Horizon (DWH) crude oil (∼30 μg L-1 ΣPAHs) for 24 h and either hypoxia (2.5 mg O2 L-1; 40% O2 saturation) or elevated temperature (30 °C) on the swimming performance of juvenile mahi-mahi (Coryphaena hippurus). Additionally, effects of shorter duration exposures to equal or higher doses of oil alone either prior to swimming or during the actual swim trial itself were examined. Only exposure to hypoxia alone or combined with crude oil elicited significant decreases in critical swimming speed (Ucrit) and to a similar extent (∼20%). In contrast, results indicate that elevated temperature might ameliorate some effects of oil exposure on swimming performance and that effects of shorter duration exposures are either reduced or delayed.
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Affiliation(s)
- Edward M Mager
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA; University of North Texas, Department of Biological Sciences, Advanced Environmental Research Institute, 1155 Union Circle, Denton, TX, 76203, USA.
| | - Christina Pasparakis
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA
| | - John D Stieglitz
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA
| | - Ronald Hoenig
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA
| | - Jeffrey M Morris
- Abt Associates, 1881 Ninth St., Suite 201, Boulder, CO 80302, USA
| | - Daniel D Benetti
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA
| | - Martin Grosell
- University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Biology and Ecology, 4600 Rickenbacker Cswy., Miami, FL 33149, USA
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Cox GK, Crossley DA, Stieglitz JD, Heuer RM, Benetti DD, Grosell M. Oil Exposure Impairs In Situ Cardiac Function in Response to β-Adrenergic Stimulation in Cobia (Rachycentron canadum). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:14390-14396. [PMID: 29132212 DOI: 10.1021/acs.est.7b03820] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aqueous crude oil spills expose fish to varying concentrations of dissolved polycyclic aromatic hydrocarbons (PAHs), which can have lethal and sublethal effects. The heart is particularly vulnerable in early life stages, as PAH toxicity causes developmental cardiac abnormalities and impaired cardiovascular function. However, cardiac responses of juvenile and adult fish to acute oil exposure remain poorly understood. We sought to assess cardiac function in a pelagic fish species, the cobia (Rachycentron canadum), following acute (24 h) exposure to two ecologically relevant levels of dissolved PAHs. Cardiac power output (CPO) was used to quantify cardiovascular performance using an in situ heart preparation. Cardiovascular performance was varied using multiple concentrations of the β-adrenoceptor agonist isoproterenol (ISO) and by varying afterload pressures. Oil exposure adversely affected CPO with control fish achieving maximum CPO's (4 mW g-1 Mv) greater than that of oil-exposed fish (1 mW g-1 Mv) at ISO concentrations of 1 × 10-6 M. However, the highest concentration of ISO (1 × 10-5 M) rescued cardiac function. This indicates an interactive effect between oil-exposure and β-adrenergic stimulation and suggests if animals achieve very large increases in β-adrenergic stimulation it could play a compensatory role that may mitigate some adverse effects of oil-exposure in vivo.
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Affiliation(s)
- Georgina K Cox
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami , Miami, Florida 33149-1098, United States
| | - Dane A Crossley
- University of North Texas , Department of Biological Sciences, 1155 Union Circle, Denton, Texas 76203, United States
| | - John D Stieglitz
- Department of Marine Ecosystems and Society, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami , Miami, Florida 33149-1098, United States
| | - Rachael M Heuer
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami , Miami, Florida 33149-1098, United States
| | - Daniel D Benetti
- Department of Marine Ecosystems and Society, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami , Miami, Florida 33149-1098, United States
| | - Martin Grosell
- Department of Marine Biology and Ecology, Rosenstiel School of Marine and Atmospheric Sciences, University of Miami , Miami, Florida 33149-1098, United States
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