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Effects of copper at sublethal concentrations on growth and biochemical parameters in rainbow trout ( Oncorhynchus mykiss )
Author(s) -
Heydarnejad Mohammad Saeed,
Khosravianhemami Mojdeh,
Nematollahi Amin,
Rahnama Samira
Publication year - 2013
Publication title -
international review of hydrobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 1434-2944
DOI - 10.1002/iroh.201201443
Subject(s) - rainbow trout , alkaline phosphatase , triglyceride , trout , chemistry , zoology , biology , alanine aminotransferase , cholesterol , endocrinology , fish <actinopterygii> , biochemistry , enzyme , fishery
The effects of sublethal concentrations of heavy metals on fish are not well known. Copper (Cu), as one of heavy metals and an environmental stressor, may alter many physiological processes like growth and serum parameters in fish. The main objective of this study was to determine the effects of copper at sublethal concentrations (10 and 30 µg/L) on growth and serum biochemical parameters including enzymes, i.e., alkaline phosphatase (ALP), aspartate aminotransferase (AST), and alanine aminotransferase (ALT), glucose, triglyceride, cholesterol, and total protein (TP) in rainbow trout ( Oncorhynchus mykiss ). Trout were exposed to copper, and at intervals of 1, 15, and 30 days, selected parameters were evaluated. Condition factor (CF), specific growth rate (SGR) and body weight gain (BWG) consistently decreased, while food conversion ratio (FCR) increased at the end of experiment. Glucose, AST, and ALT were elevated, whereas triglyceride and cholesterol decreased in trout exposed to both Cu concentrations (Cu10 and Cu30) at day 15 and then returned to levels comparable to control fish. TP and ALP increased linearly by time and Cu10 and 30. This investigation suggests that growth and serum biochemical parameters could be used as important and sensitive biomarkers in ecotoxicological studies concerning the effects of metal contamination and fish health.