?THE UPTAKE AND Loss OF ABSORBED DISSOLVED COPPER BY CMRlAS ANGllLLAlUS FINGERLINGS

Authors

  • J A 0 Oronsaye Department of Fisheries, Faculty of Agriculture, University of Benin, P M B 1154. Benin City, Nigeria
  • E E Obano Department of Fisheries, Faculty of Agriculture, University of Benin, P M B 1154. Benin City, Nigeria

Keywords:

d copper; Uptake and loss; Ckaias angullaris:

Abstract

The uptake and loss of dissolved copper In media by the African: mud fish Clarias angullaris was studied! in water
of 25mg 1-1hardness expressed as CaC03 of pH 6.8 at 27±2°C in a stanc test system. Th.euptake experiments
involved exposure offish to 05, 0.75 and E_0mg Cu+z 1-1test so[utrom;; from whiclr the Irsn. absorbed! and!retained (l<}9'1'2,
f 3 oro mg and L4036 mg Cut' g.-'wet fish wt, respectively, after 11 days, In the lass experiments, the fish were exposed:
to 05, 0.75 and tomg Cu+l [-lfor 7 days and the surviving fisn were aITawecHo recover ill copper-free-water fOil over 20
days. Approximately 50"/••ofthe absorbed copperwas shed from all fish within 2 days ..Aftelr20 days the fish IreId!01. Il019,
0_1296and ~UOWmg Cu+I g-I wet wt from previous exposures to 05. 0i.75 and E..Omg Cu+2't-L respectivefy;

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Published

2000-12-18

How to Cite

Oronsaye, J. A. 0, & Obano, E. E. (2000). ?THE UPTAKE AND Loss OF ABSORBED DISSOLVED COPPER BY CMRlAS ANGllLLAlUS FINGERLINGS. Biological Sciences - PJSIR, 43(6), 359–362. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/2069