Long - term effect of elevated temperature on bioaccumulation of dietary 1 metals and metallothionein induction in
نویسندگان
چکیده
12 Previous studies have demonstrated that the commercial feed of aquacultured 13 fish contains trace amounts of toxic and essential metals which can accumulate 14 in tissues and finally be ingested by consumers. Recently rising temperatures, 15 associated to the global warming phenomenon, have been reported as a factor 16 to be taken into consideration in ecotoxicology, since temperature -dependent 17 alterations onin bioavailability, toxicokinetics and biotransformation rates can be 18 expected. Sparus aurata were kept at 22°C, 27°C and 30°C for three months in 19 order to determine the temperature effect on metallothionein induction and 20 metal bioaccumulation from a non-experimentally contaminated commercial 21 feed. A significant temperature-dependent accumulation of cadmium (Cd), 22 copper (Cu), mercury (Hg), zinc (Zn), lead (Pb) and iron (Fe) was found in liver, 23 together with that of manganese (Mn), Fe and Zn in muscle. Hg presented the 24 *Revision, changes marked manuscript Click here to view linked References
منابع مشابه
Expression of Metallothionein, P53 and Antioxidant Enzymes by Selenium and Vitamin D3 during Diethyl Nitrosamine-Induced Rat Liver Preneoplasia
Many studies have proved that the dietary micronutrient has an inhibitory effect against experimentally induced rat hepatocarcinogenesis. The present work is an attempt to understand combined effect of selenium (Se) and vitamin D3 (vit D3) on some potential protein expression markers of carcinogenesis, such as metallothionein (MT), P53 and antioxidant levels during ...
متن کاملStudy on age-related bioaccumulation of some heavy metals in the soft tissue of rock oyster (Saccostrea cucullata) from Laft Port – Qeshm Island, Iran
Heavy metals widely enter into aquatic ecosystems, and cause various environmental problems due to bioaccumulation and biomagnification in food chains. The accumulation of heavy metals in bivalve tissues is affected by a number of intrinsic and extrinsic factors such as physiological conditions, growth, seasonal changes, pH, salinity, temperature, genera and age. The present study investigated ...
متن کاملEffects of Environmental parameters on Metallotheionin changes in polycheate (Glycinde boundari) of Chabahar Bay
In addition to heavy metals, environmental factors affect to induce the synthesis of metallothionein (MT) contamination biomarker in vertebrates and invertebrates. Environmental parameters that were selected of nine stations in Chabahar Bay subtidal area (2013-14) include temperature, salinity, dissolved oxygen and turbidity and heavy metals (copper, zinc, cadmium) in monsoon and post-monsoon,...
متن کاملBioaccumulation of metals in sediment elutriates and their effects on growth, condition index, and metallothionein contents in oyster larvae.
The bioavailability of Cd, Cu, Zn, and Pb from two metal-contaminated sediments (Bidassoa and Dunkerque) was studied using Crassostrea gigas larvae exposed to sediment elutriates. The metal contents within the sediments, the larvae and larval growth, the condition index, and the induction of metallothionein in the larvae were measured. The larval growth and condition index were only affected af...
متن کاملEstimating the Effect of pH, Moisture and Heavy Metals Interaction on Worm’s Bioaccumulation Using a Linear Model
In the process of vermicomposting, the earthworms Eisenia fetida have been exposed to various metals with different concentrations to study the effects on worms’ bioaccumulation. The study was carried within 14 days of exposure. Five different chemical compounds in various concentrations were added as mixture solutions to the experimental containers. Metals concentrations were measured in earth...
متن کامل