Acclimation to hypoxia increases survival time of zebrafish,Danio rerio, during lethal hypoxia

Rees, B.; Sudradjat, Fitri A.; Love, Joseph W.

doi:10.1002/1097-010x(20010401/30)289:4<266::aid-jez7>3.0.co;2-5

Cited by 84 publications

(61 citation statements)

References 15 publications

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“…This interpretation is in agreement with that reported by Dykstra et al (1989) and Bone (1978). Several authors reported the prevalence of anaerobic oxidation in white muscles resulting from the limited number of mitochondria (Virani & Rees 2000, Rees et al 2001. The data of the present study showed that the potential destructive indicator TP gives similar results to that of LPO in both muscle and gill in response to pathogen treatment with various species and routes of administration.…”

Section: Oxidative Stress Biomarkerssupporting

confidence: 73%

Pathogenicity and oxidative stress in Nile tilapia caused by Aphanomyces laevis and Phoma herbarum isolated from farmed fish

Ali¹,

Hashem²,

Al-Salahy³

2011

Dis. Aquat. Org.

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Identified (n = 17) and unidentified (n = 1) fish-pathogenic fungal species from 10 genera of Oomycetes and soil fungi were isolated from 40 infected freshwater fish samples of the species Oreochromis niloticus niloticus (Nile tilapia) and Clarias gariepinus (African catfish). Samples were collected from various fish farms in the Nile Delta, Egypt. Nile tilapia were tested in aquaria for their susceptibility to the commonest Oomycetes species, Aphanomyces laevis and Achlya klebsiana, and also against the 2 most prevalent pathogenic soil fungi, Paecilomyces lilacinus and Phoma herbarum. Two techniques were used: water bath exposure and intramuscular (subcutaneous) injection. Water bath exposure to the 2 species of Oomycetes caused greater mortalities of O. niloticus niloticus than intramuscular injection, but the reverse was true of the soil fungal species. Regardless of the infection method, the 2 Oomycetes species were more potent pathogens than the soil fungal species. In both gills and mytomal muscles of fish infected by A. laevis and P. herbarum, we measured and compared with controls the oxidative stress parameters total peroxide (TP), lipid peroxidation (LPO) and nitric oxide (NO), as well as levels of the antioxidants vitamin E and glutathione (GSH), and superoxide dismutase (SOD) and catalase (CAT) activities. Infection by these 2 fungal species through either spore suspension or spore injection significantly increased oxidative damage in gills and induced marked decrease in most studied antioxidants. In addition, both routes showed similar effects and A. laevis depressed the antioxidants CAT, vitamin E and GSH more than P. herbarum.

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Section: Oxidative Stress Biomarkerssupporting

confidence: 73%

Pathogenicity and oxidative stress in Nile tilapia caused by Aphanomyces laevis and Phoma herbarum isolated from farmed fish

Ali¹,

Hashem²,

Al-Salahy³

2011

Dis. Aquat. Org.

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“…Differences in survival response to an acute additional stress between fed and starved fish may be related to the energetic expenditure required for the digestion and assimilation of food (Brett and Groves, 1979). In zebra fish, Danio rerio, acclimation to 10% air saturation for 48 h significantly extended survival time during more severe hypoxia (5% air saturation) compared to individuals with no prior hypoxic exposure (Rees et al, 2001). The magnitude of the acclimation effect depended on sex and season, suggesting that hypoxia tolerance in zebra fish (and probably in other fish species) is modulated by genetic and/or environmental factors; as a result, comparisons within and between species are difficult.…”

Section: Discussionmentioning

confidence: 99%

Effects of repeated hypoxic shocks on growth and metabolism of turbot juveniles

Ruyet

2003

Aquatic Living Resources

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Turbot juveniles (45 g) were exposed for 41 d (17°C, 34‰ salinity) to constant normoxic (100-100% air saturation, 100-100) or moderate hypoxic (75-75% air saturation, 75-75) conditions and to repeated hypoxic shocks (20% saturation for 1 h, 5 d per week) from normoxic (100-20% air saturation, 100-20) or moderate hypoxic (75-20% air saturation, 75-20) conditions. A normoxic group was feed restricted (100-FR). Mass increase of 100-100 and 75-75 groups fed to satiation was not significantly different. In comparison, it was significantly lower in the 100-20 and 75-20 groups (NS between the two hypoxic shocks groups). Intermediate results were obtained in the 100-100-FR group. The lowest mass increase under hypoxic shocks was explained by a significant decrease in both feed intake and food conversion efficiency (FCE). FCE was lower in the two hypoxic groups, but only the 75-20 group was significantly different from all the other groups. There was no sign of stress and no change in the physiological status of fish in any group. When challenged, pre-conditioning of turbot to regular hypoxic shocks extended survival time, slightly but significantly, for 50% of the population. It was 8 h longer in starved than in fed fish. When reared for 1 year in normoxic water, the growth rate of post-challenged survivors was dependent on pre-conditioning: day 0-375 specific growth rate was significantly higher in the two groups acclimated to repeated hypoxic shocks. In the second experiment, it was shown that exposure to 20% air saturation for 12 h led to major physiological changes within 4 h: a significant decrease in plasma total CO 2 and increase in plasma lactate contributing in maintaining blood pH stable, and a significant increase in osmolarity and chloride concentration. When returned to normoxic water, the recovery capacity of the fish was high: plasma osmolarity and total CO 2 returned to pre-exposure levels within 1 h. The results are discussed in terms of turbot capacity to cope with repeated hypoxic shocks and to acclimate. RésuméEffets de chocs hypoxiques répétés sur la croissance et le métabolisme du turbot juvénile. Des turbots (45 g) ont été élévés pendant 41 jours (17°C, et 34 salinité) en normoxie (100-100 % de la saturation) ou hypoxie modérée (75-75), ou soumis à des chocs hypoxiques de 20 % de la saturation pendant une heure 5 fois par semaine (100-20 et 75-20). Un lot en normoxie reçoit la ration alimentaire du lot 100-20 (100-R). La croissance pondérale n'a pas été perturbée par l'hypoxie modérée à niveau constant mais l'a été par les chocs hypoxiques répétés. La baisse de croissance observée résulte d'un effet cumulé d'une baisse de l'appétit et d'une diminution de l'efficacité alimentaire (lot 75-20 significativement différent des autres lots). Aucune modification de l'état physiologique n'a été mise en évidence (absence de stress). Une mise à l'épreuve en fin d'expérience (20 % de la saturation) a montré qu'un préconditionnement à différentes conditions d'oxygénation a un effet bénéfique faible ma...

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“…Acclimation, a form of reversible phenotypic plasticity, is known to modify the maximum temperature tolerance and hypoxia tolerance of many, but not all, fish species (e.g. Rees et al, 2001;Ford and Beitinger, 2005;Eme and Bennett, 2009;Fu et al, 2011;Petersen and Gamperl, 2011). For example, salmonids appear to have fairly limited capacity for acclimation of these traits as maximum temperature tolerance changes only a few degrees in response to acclimation (Elliott, 1991;Baroudy and Elliott, 1994).…”

Section: Introductionmentioning

confidence: 99%

Variation in temperature tolerance among families of Atlantic salmon (Salmo salar) is associated with hypoxia tolerance, ventricle size and myoglobin level

Anttila

Dhillon

Boulding

et al. 2013

Journal of Experimental Biology

177

119

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SUMMARYIn fishes, performance failure at high temperature is thought to be due to a limitation on oxygen delivery (the theory of oxygen and capacity limited thermal tolerance, OCLTT), which suggests that thermal tolerance and hypoxia tolerance might be functionally associated. Here we examined variation in temperature and hypoxia tolerance among 41 families of Atlantic salmon (Salmo salar), which allowed us to evaluate the association between these two traits. Both temperature and hypoxia tolerance varied significantly among families and there was a significant positive correlation between critical maximum temperature (CT max ) and hypoxia tolerance, supporting the OCLTT concept. At the organ and cellular levels, we also discovered support for the OCLTT concept as relative ventricle mass (RVM) and cardiac myoglobin (Mb) levels both correlated positively with CT max (R 2 =0.21, P<0.001 and R 2 =0.17, P=0.003, respectively). A large RVM has previously been shown to be associated with high cardiac output, which might facilitate tissue oxygen supply during elevated oxygen demand at high temperatures, while Mb facilitates the oxygen transfer from the blood to tissues, especially during hypoxia. The data presented here demonstrate for the first time that RVM and Mb are correlated with increased upper temperature tolerance in fish. High phenotypic variation between families and greater similarity among full-and half-siblings suggests that there is substantial standing genetic variation in thermal and hypoxia tolerance, which could respond to selection either in aquaculture or in response to anthropogenic stressors such as global climate change.

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Acclimation to hypoxia increases survival time of zebrafish,Danio rerio, during lethal hypoxia

Cited by 84 publications

References 15 publications

Pathogenicity and oxidative stress in Nile tilapia caused by Aphanomyces laevis and Phoma herbarum isolated from farmed fish

Pathogenicity and oxidative stress in Nile tilapia caused by Aphanomyces laevis and Phoma herbarum isolated from farmed fish

Effects of repeated hypoxic shocks on growth and metabolism of turbot juveniles

Variation in temperature tolerance among families of Atlantic salmon (Salmo salar) is associated with hypoxia tolerance, ventricle size and myoglobin level

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