Energy Levels of Penaeus indicus Postlarvae on Exposure to Lead

Chinni, S.; Yallapragada, Prabhakara Rao

doi:10.1006/eesa.2002.2171

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…These mechanisms are assumed to have high energy costs. Indeed, it has been shown that energy precursors, such as carbohydrates, proteins, and lipids, have a key role in overcoming toxic stress [20]. These mechanisms probably involve a regulation of the internal concentration of copper [21].…”

Section: Discussionmentioning

confidence: 99%

Energy‐based modeling as a basis for the analysis of reproductive data with the midge (Chironomus riparius)

Ducrot¹,

Péry²,

Mons³

et al. 2004

Enviro Toxic and Chemistry

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We propose a biologically based approach to analyze reproductive data for the midge (Chironomus riparius). We showed in a previous study that its larval development can be divided in two distinct phases regarding the use of energy: The somatic growth period and the gametic growth period. We hypothesize here the gametic period to be a crucial period for the energetic investment for reproduction. To test this, we performed several assays with different feeding programs. Our results confirmed that energetic investment for reproduction mainly occurs during the gametic growth period. We could then propose energy-based models to analyze reproductive data. We assumed the effects to result from a perturbation in the use of energy. Two models corresponding to different physiological modes of actions--decreased efficiency of feeding (i.e., feeding decrease model) or increased cost of egg production (i.e., egg-cost increase model)--were built and used for the analysis of data obtained after an exposure to an artificially copper-spiked sediment. During this experiment, different exposure patterns were performed to investigate whether effects on reproduction resulted mainly from an exposure that occurs during the gametic growth period or from an exposure that occurs during the somatic growth period. These exposure patterns led to similar effects on reproduction, which suggests that the toxicant-induced stress persists during the whole life cycle, even in case of exposure occurring only during part of it. Both the feeding decrease model and egg-cost increase model were able to describe the data. We showed that addition of copper in the sediment, even in low quantity (<6.5 mg/kg), might affect reproduction at the individual level. If no-effect concentrations were derived from these results, this may lead to an overprotective value. A relevant no-effect concentration could be derived from further investigations at the population level.

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Section: Discussionmentioning

confidence: 99%

Energy‐based modeling as a basis for the analysis of reproductive data with the midge (Chironomus riparius)

Ducrot¹,

Péry²,

Mons³

et al. 2004

Enviro Toxic and Chemistry

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“…As described by Chinni and Yallapragada (2002), the caloric reward (J/mL) for each hemolymph sample was calculated by assuming caloric values of 39.748 J/mg for lipids, 15.899 J/mg for sugar, and 17.154 J/mg for proteins.…”

Section: Caloric Value Calculationmentioning

confidence: 99%

Accumulation of cadmium and its effects on growth, development and hemolymph biochemical compositions in Boettcherisca peregrina larvae (Diptera: Sarcophagidae)

Yè

et al. 2006

Insect Science

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Newly emerged larvae of the fleshfly, Boettcherisca peregrina were exposed to two different CdCI2 concentrations of 100 μg/g and 400 mg/g diet fresh weight (DFW). They were administered in the diets until the end of larval stage. Cd‐exposed larvae accumulated significant amounts of Cd and this accumulation increased with the exposure dose and time. The body weights were lightened and lengths of larvae were shortened considerably after Cd exposure, especially at the higher Cd concentration. The total larval duration was also extremely affected due to Cd exposure. The average duration was prolonged significantly by 14 h at the lower Cd concentration, while it was increased by 33.7 h over controls at the higher Cd concentration. A significant decrease in contents of either soluble proteins, total lipids or caloric values in the hemolymph occurred due to Cd exposure throughout the entire tested period but after 120 h of Cd exposure. In contrast, when exposed to Cd with its higher concentration, total sugar contents in the hemolymph were increased strikingly over the whole tested time, except after 96 h of Cd exposure, while they were not apparently altered except after 24 h of Cd exposure at the lower concentration. Thus, it is suggested that Cd exposure shows significant adverse impact on the growth and development, as well as metabolism, in larvae of this fleshfly, depending on its exposure time and dose.

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“…Perturbations in triglycerides levels caused by arsenic can also be observed (Table ), which decrease in both groups exposed to this element compared with the control group that denote the occurrence of dyslipidemia associated to digestive gland failure. The perturbation in lipid content has been previously reported in crayfish as a consequence of stress produced by exposure to inorganic pollutants .…”

Section: Resultsmentioning

confidence: 65%

Combination of HPLC with organic and inorganic mass spectrometry to study the metabolic response of the clam Scrobicularia plana to arsenic exposure

et al. 2017

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Arsenic is a toxic element extensively studied in the marine environment due to differential toxicological effects of inorganic and organic species. In the present work, the bivalve Scrobicularia plana was exposed to As (10 and 100 μg/L) for 14 days to evaluate the metabolic perturbations caused by this element. Arsenic speciation and metabolomic analysis were performed in the digestive gland of the bivalve using two complementary analytical platforms based on inorganic and organic mass spectrometry. It has been observed the greater presence of the innocuous specie arsenobetaine produced in this organism as defense mechanism against arsenic toxicity, although significant concentrations of methylated and inorganic arsenic were also present, depending on the level of arsenic in aqueous media. Complementarily, a metabolomic study based on mass spectrometry and statistical discriminant analysis allows a good classification of samples associated to low and high As(V) exposure in relation to controls. About 15 metabolites suffer significant changes of expression by the presence of As(V): amino acids, nucleotides, energy-related metabolites, free fatty acids, phospholipids and triacylglycerides, which can be related to membrane structural and functional damage. In addition, perturbation of the methylation cycle, associated with the increase of homocysteine and methionine was observed, which enhance the methylation of toxic inorganic arsenic to less toxic dimethylarsenic.

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Energy Levels of Penaeus indicus Postlarvae on Exposure to Lead

Cited by 8 publications

References 20 publications

Energy‐based modeling as a basis for the analysis of reproductive data with the midge (Chironomus riparius)

Energy‐based modeling as a basis for the analysis of reproductive data with the midge (Chironomus riparius)

Accumulation of cadmium and its effects on growth, development and hemolymph biochemical compositions in Boettcherisca peregrina larvae (Diptera: Sarcophagidae)

Combination of HPLC with organic and inorganic mass spectrometry to study the metabolic response of the clam Scrobicularia plana to arsenic exposure

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