Metabolic capacities of common carp (Cyprinus carpio) following combined exposures to copper and environmental hypoxia

Ecotoxicology and Environmental Safety
Pedram MalekpouriBabak Mohammadian

Abstract

In aquatic ecosystems, a decline in water O2 level is the main factor that can release heavy metal ions from top sediment layer. Therefore, hypoxia in turn, and in association with heavy metals might provide undesirable environment and impairs physiological functions of aquatic animals. To address this, metabolic capacities, including standard metabolic rate (SMR), maximum metabolic rate (MMR), aerobic scope (AS) and factorial aerobic scope (FAS) of common carp were determined following exposures to different levels of water-borne Cu(2+) as well as hypoxia. Treatments for Cu(2+) were included: 100% (acute), 50% (sub-lethal) and 10% (chronic) of LC50-96h for immediately, 24h and 7 days exposures respectively. Hypoxia treatments were assigned as acute for immediately, sub-lethal for 24h and chronic for 7 days. Combined effects of treatments were also considered as acute Cu(2+)+hypoxia, sub-lethal Cu(2+)+hypoxia and chronic Cu(2+)+hypoxia. While SMR of carp was reduced by chronic hypoxia, significant (P<0.05) increase was observed during acute hypoxia, as compared with control. The MMR and AS were significantly reduced (P<0.05) following all hypoxia treatments. The acute and chronic Cu(2+) treatments showed significant (P<0.05) in...Continue Reading

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Nov 11, 2019·The Journal of Experimental Biology·Essie M Rodgers, Gudrun De Boeck
Apr 28, 2019·Environmental Science and Pollution Research International·Farhana Ahmad Affandi, Mohd Yusoff Ishak
Dec 18, 2020·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·M PilletG De Boeck
Jun 9, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Luca PeruzzaChris Hauton

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