Decreased survival of rainbow trout exposed to no. 2 fuel oil caused by sublethal preexposure

Steadman, Bryan L.; Stubblefield, William A.; LaPoint, Thomas W.; Bergman, Harold L.; Kaiser, Mark J.

doi:10.1002/etc.5620100308

Cited by 15 publications

(3 citation statements)

References 20 publications

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“…Channel catfish exposed to contaminant effluents, showed hepatic CAT activities with dose-and time-dependent increases, but no other index of oxidative stress (malonaldehyde or methemoglobin) displayed consistent responses (Winston & Di Giulio, 1991). Moreover, Steadman et al (1991) reported a dose and time dependence of xenobiotic metabolism in rainbow trout exposed to No. 2 fuel oil.…”

Section: Resultsmentioning

confidence: 95%

N. 6 Fuel Oil Effects on Antioxidant Enzymes and Immunological Responses in the Fish Thalassophryne maculosa (Pisces: Batrochoididae)

Marcano¹,

Nusetti²,

Zapata-Vívenes³

et al. 2006

Ecotoxicol. Environ. Contam.

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With the aim of investigate the acute effects of two concentrations (25 and 100%) of N. 6 fuel oil-water-accommodated fraction (OWAF) on antioxidant enzyme activities and immunological responses, fishes Thalassophryne maculosa were sampled from the La Restiga Lagoon, Margarita island, in eastern Venezuela. The antioxidant enzymes, catalase (CAT), glutathione peroxidase (GPX), glutathione reductase (GR) and glutathione-S-transferase (GST) were measured in liver and gills. The macrophagic phagocytosis and antibacterial lysozyme activity of anterior kidney were the immune parameters examined. Increases in gill GST activity and hepatic GR activity were observed after the exposure to 25 and 100% OWAF, respectively. GPX, CAT and immune responses were not affected by the experimental treatments. Our results demonstrated that among the antioxidant enzymes tested, GR and GST activities were the most sensible to the acute treatment with fuel oil, indicating changes in the redox cellular state that may result in oxidative stress in T. maculosa.

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Section: Resultsmentioning

confidence: 95%

N. 6 Fuel Oil Effects on Antioxidant Enzymes and Immunological Responses in the Fish Thalassophryne maculosa (Pisces: Batrochoididae)

Marcano¹,

Nusetti²,

Zapata-Vívenes³

et al. 2006

Ecotoxicol. Environ. Contam.

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“…However, long-term exposure to a pollutant does not systematically induce an increased resistance in the exposed organisms. For example, pre-exposure of yearling trout, Salvelinus fontinalis, to sublethal concentrations of lead did not induce acclimation Tang and Garside (1987) and Steadman et al (1991) even observed decreased survival of Oncorhynchus mykiss exposed to N82 fuel oil after a sublethal pre-exposure. McDonald and Wood (1993) defined the acclimation window to a pollutant as the concentration of that toxicant and the exposure time necessary to observe an increased resistance.…”

Section: Acclimation To Pollutantsmentioning

confidence: 98%

Proteomics to Assess the Role of Phenotypic Plasticity in Aquatic Organisms Exposed to Pollution and Global Warming

Silvestre

Gillardin

Dorts

2012

Integrative and Comparative Biology

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Nowadays, the unprecedented rates of anthropogenic changes in ecosystems suggest that organisms have to migrate to new distributional ranges or to adapt commensurately quickly to new conditions to avoid becoming extinct. Pollution and global warming are two of the most important threats aquatic organisms will have to face in the near future. If genetic changes in a population in response to natural selection are extensively studied, the role of acclimation through phenotypic plasticity (the property of a given genotype to produce different phenotypes in response to particular environmental conditions) in a species to deal with new environmental conditions remains largely unknown. Proteomics is the extensive study of the protein complement of a genome. It is dynamic and depends on the specific tissue, developmental stage, and environmental conditions. As the final product of gene expression, it is subjected to several regulatory steps from gene transcription to the functional protein. Consequently, there is a discrepancy between the abundance of mRNA and the abundance of the corresponding protein. Moreover, proteomics is closer to physiology and gives a more functional knowledge of the regulation of gene expression than does transcriptomics. The study of protein-expression profiles, however, gives a better portrayal of the cellular phenotype and is considered as a key link between the genotype and the organismal phenotype. Under new environmental conditions, we can observe a shift of the protein-expression pattern defining a new cellular phenotype that can possibly improve the fitness of the organism. It is now necessary to define a proteomic norm of reaction for organisms acclimating to environmental stressors. Its link to fitness will give new insights into how organisms can evolve in a changing environment. The proteomic literature bearing on chronic exposure to pollutants and on acclimation to heat stress in aquatic organisms, as well as potential application of proteomics in evolutionary issues, are outlined. While the transcriptome responses are commonly investigated, proteomics approaches now need to be intensified, with the new perspective of integrating the cellular phenotype with the organismal phenotype and with the mechanisms of the regulation of gene expression, such as epigenetics.

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“…In contrast, previous exposure to No. 2 fuel oil decreased survival of rainbow trout [7]. Mechanisms by which tolerance of a population can change include physiological acclimation and genetic selection.…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF PREVIOUS ZINC EXPOSURE ON pH TOLERANCE OF PERIPHYTON COMMUNITIES

Niederlehner¹,

Cairns

1993

Environ Toxicol Chem

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The community-level effects of previous chemical exposure on resistance to a dissimilar subsequent stress were evaluated. Naturally derived periphytic communities on polyurethane-foam artificial substrates provided colonists for development of new communities under controlled stress conditions in the laboratory. Communities were colonized under three levels of Zn stress: control, low (73 pg/L), and high (172 Fg/L). After 21 d, laboratory-colonized communities were exposed to 5 pH levels (control, 4.5,4.0, 3.5, 3.0) for 48 h. No significant differences occurred between Zn treatments in response to pH for total biomass, assimilation ratio, respiration to biomass ratio, and net daily metabolism. Response to pH was dependent on Zn treatment for number of protozoan species, algal biomass, gross primary productivity, and community respiration. Number of protozoan species in high Zn was impaired in absence of pH stress. Primary production and community respiration were impaired in absence of pH stress in both low and high Zn. For these three end points, outcome for Zn treatments converged with increasing secondary stress; no differences between Zn treatment groups were observed at pH < 4.0. For several end points, Zn-stressed communities changed less, relative to their initial state, with subsequent acid shock.

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Decreased survival of rainbow trout exposed to no. 2 fuel oil caused by sublethal preexposure

Cited by 15 publications

References 20 publications

N. 6 Fuel Oil Effects on Antioxidant Enzymes and Immunological Responses in the Fish Thalassophryne maculosa (Pisces: Batrochoididae)

N. 6 Fuel Oil Effects on Antioxidant Enzymes and Immunological Responses in the Fish Thalassophryne maculosa (Pisces: Batrochoididae)

Proteomics to Assess the Role of Phenotypic Plasticity in Aquatic Organisms Exposed to Pollution and Global Warming

EFFECTS OF PREVIOUS ZINC EXPOSURE ON pH TOLERANCE OF PERIPHYTON COMMUNITIES

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