Low-salinity stress in the American lobster,Homarus americanus, after chronic sublethal exposure to cadmium: Biochemical effects

Gould, Edith

doi:10.1007/bf02414733

Cited by 19 publications

(5 citation statements)

References 16 publications

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“…Besides the cytological damage of gill, heavy metals also inhibit mitochondrial energy production, thereby affecting the key metabolic pathways. By contrast, an increased respiration rate has been detected in freshwater shrimp, Paratya curvirostris 21 , and lobster Homarus americanus 31 . The authors argued that it was attributed to an elevated rate of glycolysis, a mechanism of expenditure of energy reserves characteristic of a stress compensation process.…”

Section: Exposure Concentration (Mg/l)mentioning

confidence: 84%

Acute and sub-chronic effects of copper on survival, respiratory metabolism, and metal accumulation in Cambaroides dauricus

Bao

Xing

Feng

et al. 2020

Sci Rep

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Trace metal contamination in the aquatic ecosystem occurs worldwide: although copper is an essential trace metal, it is considered as a pollutant at certain levels in China. Freshwater crayfish Cambaroides dauricus is a commercially important wild species in northeastern China, in which is an important heavy industry area. The population of C. dauricus was decreasing sharply due to the environmental pollution and human intervention over the past 20 years. However, nothing is known regarding the responses of this species to trace metal toxicants. This study aimed to determine the acute and chronic toxicity of Cu and its toxicological effects on respiratory metabolism, as well as Cu accumulation in C. dauricus. The acute (96 h) median lethal concentration (LC50) value of 32.5 mg/L was detected in C. dauricus. Then, acute (96 h; 8.24, 16.48 mg/L) and sub-chronic (14 days; 2.06, 4.12 mg/L) exposure in Cu was investigated by estimating the oxygen consumption rate, ammonium excretion rate, and Cu accumulation. Both acute and sub-chronic Cu exposure induced an inhibition of the oxygen consumption rate and ammonium excretion rate, and thereby, an increased O:N ratio. The shift in O:N ratio indicated a metabolic substrate shift towards lipid and carbohydrate metabolism under Cu stress. Cu accumulation in the hepatopancreas and muscles throughout the study was found to be time-dependent and concentration-dependent. The maximum accumulation in the hepatopancreas and muscle were almost 31.6 folds of the control after 14 days’ exposure to 4.12 mg/L concentration. Based on the present work, we suggest that crayfish be considered a potential bioindicator of environmental pollution in freshwater systems. The study provides basic information for further understanding of the toxicological responses of this species to trace metals.

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Section: Exposure Concentration (Mg/l)mentioning

confidence: 84%

Acute and sub-chronic effects of copper on survival, respiratory metabolism, and metal accumulation in Cambaroides dauricus

Bao

Xing

Feng

et al. 2020

Sci Rep

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“…From an enzymatic viewpoint, cadmium disturbs the activities of a large number of enzymes in molluscs (Evtushenko et al 1984), in crustaceans (Gould 1980, Amiard et al 1982, Berglind 1985, and fishes (George et al 1985, Hilmy et al 1985, Koyama et al 1985, Sastry and Subhadra 1985, Foerlin et al 1986, George and Young 1986.…”

Section: Introductionmentioning

confidence: 98%

Sublethal effects of cadmium on respiratory metabolism, nutrition, excretion and hydrolase activity inLeptomysis lingvura (Crustacea: Mysidacea)

Gaudy¹,

Guérin²,

Kerambrun³

1991

Mar. Biol.

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Abstract. The lethal concentration of cadmium was determined for the mysid Leptomysis lingvura G.O. Sars, a Mediterranean species from surface coastal waters, and the effect of sublethal doses on respiration, ammonia excretion, and feeding efficiency at different temperatures, and on activities of 19 hydrolases was tested. Experiments were carried out on individuals collected in spring 1987 near Marseille. At 18 °C, respiration rate was significantly affected only by concentrations > 0.05 mg Cd 1-1. At 0.1 mg Cd 1-1, respiration rate was more significantly depressed at 20 °C than at 10 °C. There was a concomitant decrease in the Qlo rate (by 23 to 59%, according to the particular experiment), indicating a strong synergistic effect of temperature. Ammonia excretion was likewise affected by cadmium, also with a concomitant decrease in the Qlo rate (by 34%). Daily faecal pellet production was maximum at 18 °C; it was inhibited by cadmium at temperatures between 14 and 20 °C, and enhanced at extreme temperatures (10 and 22 °C). The assimilation efficiency of contaminated individuals was reduced by 9%. These decreases in faecal pellet production and assimilation efficiency reflect a significant decrease in energy (by about 43%) which could rapidly lead to an unbalanced energy budget with a consecutive lowering of the reproductive potential. Generally, hydrolase activities usually increased initially in the presence of 0.2rag Cd1-1, but after 48 h they declined, reaching very low values at 72 h. Most physiological processes are therefore affected by exposure to cadmium and the unbalanced energy budget arises from the inability to utilize environmental food. These results are consistent with the literature data on cadmium contamination in marine organisms. Physiological and biochemical changes appear to be very informative in studies of in vitro sublethal effects ofmicropollutants and in situ environmental modifications.

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“…This observation was confirmed by the evaluation of the basal expression of key metabolic genes, such as malate dehydrogenase (MDH), citrate synthase (CS), and thiolase. Variations in MDH have been reported in lobsters and polychaete annelids in association with salinity 64,65 . X. securis showed higher basal expression values of all those enzymes compared to M. galloprovincialis , suggesting a higher basal demand to obtain the energy for physiological processes.…”

Section: Discussionmentioning

confidence: 96%

Integrated transcriptomic and functional immunological approach for assessing the invasiveness of bivalve alien species

Romero

Aranguren

Moreira

et al. 2019

Sci Rep

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Biological invasions started when humans moved species beyond their normal geographic limits. Bivalves are the most notoriously invasive species in subtidal aquatic environments. Next-generation sequencing technologies are applied to understand the molecular mechanisms involved in the invasion. The ecological immunology focuses on the role of immunity in invasion, and its magnitude could help to predict the invasiveness of alien species. A remarkable case of invasion has been reported in the Ría de Vigo (Spain) by the black pygmy mussel Xenostrobus securis. In Galicia, the Mediterranean mussel Mytilus galloprovincialis is the predominant cultured bivalve species. Can we predict the invasiveness of alien bivalve species by analyzing their immune response? Can X. securis represent a risk for the autochthonous mussel? We evaluated the suitability of the immune-related hypotheses in our model by using an integrated transcriptomic and functional immunological approach. Our analysis suggests lower immune capabilities in X. securis compared to M. galloprovincialis, probably due to the relocation of energetic resources from the immune response to vital physiological processes to cope with salinity stress. This multidisciplinary approach will help us understand how the immune response can be influenced by the adaptive process and how this immune response can influence the invasion process.

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Low-salinity stress in the American lobster,Homarus americanus, after chronic sublethal exposure to cadmium: Biochemical effects

Cited by 19 publications

References 16 publications

Acute and sub-chronic effects of copper on survival, respiratory metabolism, and metal accumulation in Cambaroides dauricus

Acute and sub-chronic effects of copper on survival, respiratory metabolism, and metal accumulation in Cambaroides dauricus

Sublethal effects of cadmium on respiratory metabolism, nutrition, excretion and hydrolase activity inLeptomysis lingvura (Crustacea: Mysidacea)

Integrated transcriptomic and functional immunological approach for assessing the invasiveness of bivalve alien species

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