Morphological abnormalities in Chironomus tentans exposed to cadmium—and copper-spiked sediments

Martinez, Edward; Moore, Barry; Schaumloffel, John; Dasgupta, Nairanjana

doi:10.1016/s0147-6513(02)00136-7

Cited by 73 publications

(23 citation statements)

References 32 publications

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“…Benthic organisms, such as Chironomidae larvae, are burrowers (Bird et al, 1995) and because they feed on detritus, the metal in the particles poses a high exposure risk (Martinez et al, 2003). However, the physical and chemical conditions in the digestive tract of these organisms can change the toxicity of the metal (Tessier and Campbell,1987).…”

Section: Discussionmentioning

confidence: 99%

Use of artificial sediment to assess toxicity of chromium on Chironomus xanthus, Danio rerio and Poecilia reticulata

et al. 2013

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AIM: Artificial sediments with simple formulations were used to assess the toxicity of Cr to C. xanthus, D. rerio and P. reticulata. METHODS: The organisms were exposed to two sediment formulations: one without organic matter (S0) and one with 1% organic matter (SIII), both contaminated with Cr at concentrations of 90, 180, 360, 720 and 1440 mg/kg for the assays with C. xanthus, and 375, 750, 1500 and 3000 mg/kg for those with the two fish species. Chromium was obtained from the potassium dichromate (K2Cr2O7). RESULTS: The results of the acute toxicity tests demonstrated a reduction of up to four times in toxicity with the presence of OM, consisting of biodegradable detritus, even at the low concentration used (1%), and that C. xanthus was most sensitive to the metal. The reduction in the chromium toxicity was indicated by the LC50 values, which were higher in SIII (1234.43 mg/kg; 2263.54 m/kg; 2244.48 mg/kg) than in S0 (340.56 mg/kg; 1731.04 mg/kg; 1733.55 mg/kg) for C. xanthus, D. rerio and P. reticulata, respectively. CONCLUSIONS: Because of the repeatability of the results obtained, the artificial sediments with simple formulations were satisfactory to assess toxicity and can thus provide reliable results in ecotoxicological studies

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Section: Discussionmentioning

confidence: 99%

Use of artificial sediment to assess toxicity of chromium on Chironomus xanthus, Danio rerio and Poecilia reticulata

et al. 2013

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“…Indeed, it has been shown that C. riparius larvae suffer delays in growth when food is restricted (e.g., Ristola et al, 1999;Pe´ry et al, 2002). Copper is known to induce morphological deformities of the mentum and mandibles in chironomids (Janssens de Bisthoven et al, 1992Martinez et al, 2003). Therefore, it cannot be excluded that mouthpart .…”

Section: Discussionmentioning

confidence: 99%

Effects of copper on energy metabolism and larval development in the midge Chironomus riparius

Servia

Péry²,

Heydorff

et al. 2006

Ecotoxicology

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When spiked in sediments, copper is known to reduce growth of Chironomus riparius larvae and the production of eggs by adult females. The aim of this work was to better understand the origin of these phenomena by studying the effects of copper using developmental and energetic biomarkers, such as changes in larval weight and age and changes in the levels of sugars and lipids. Four-day-old C. riparius larvae were exposed to nominal concentrations of copper of 0, 6.5, 12.5, 25 and 50 mg/kg of dry sediment (silica) in 0.6 l beakers. They were fed ad libitum and exposures were stopped at 7 and 9 days after the beginning of the tests. The larvae were weighed, sexed and aged. For each sex, the larvae belonging to the phases the most frequently found in the beakers were selected for dissection and measurement of energy reserves. The increase in the concentration of copper resulted in an increasing delay in larval growth in both sexes. Desynchronized development was observed, as shown by the increase in the number of individuals that remained in the third instar or early phases of the fourth instar, as well as by a reduction in age of males. Concerning energy reserves, the levels of sugars (glycogen, trehalose and glucose) in the dissected larvae remained almost constant among levels of exposure. In contrast, at the highest copper concentration (50 mg/kg), triglyceride levels suffered a slight reduction whereas the level of free glycerol significantly increased. It is concluded that selection of C. riparius larvae for both sex and age improves the relevance of some energy-yielding substrates as indicators of adverse physiological effects of copper.

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“…Ecotoxicological tests of chemicals have been traditionally performed in laboratory assays using mortality, growth rate, behavior, and reproduction as endpoints (Hatakeyama 1988;Williams et al 1987). Larval mouthpart deformities are also indicators of anthropogenic stress (Martinez et al 2003). Moreover, the giant polytene chromosomes from the salivary gland cells are also suitable for analyzing the genotoxic effects of pollutants (Michailova et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Characterization of the small heat shock protein Hsp27 gene in Chironomus riparius (Diptera) and its expression profile in response to temperature changes and xenobiotic exposures

Martínez-Paz

Morales

Martı́n

et al. 2014

Cell Stress and Chaperones

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Morphological abnormalities in Chironomus tentans exposed to cadmium—and copper-spiked sediments

Cited by 73 publications

References 32 publications

Use of artificial sediment to assess toxicity of chromium on Chironomus xanthus, Danio rerio and Poecilia reticulata

Use of artificial sediment to assess toxicity of chromium on Chironomus xanthus, Danio rerio and Poecilia reticulata

Effects of copper on energy metabolism and larval development in the midge Chironomus riparius

Characterization of the small heat shock protein Hsp27 gene in Chironomus riparius (Diptera) and its expression profile in response to temperature changes and xenobiotic exposures

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