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Resistance to zinc sulphate of the zebrafish ( Brachydanio rerio Hamilton‐Buchanan) at different phases of its life history
Author(s) -
SKIDMORE J. F.
Publication year - 1965
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1965.tb01214.x
Subject(s) - biology , hatching , fish <actinopterygii> , zinc , zoology , zebrafish , fishery , biochemistry , gene , materials science , metallurgy
SUMMARY Zebrafish of eleven age groups were exposed to four concentrations of zinc sulphate (5, 10, 20 and 40 p.p.m. Zn) in soft water (CaCO 3 10 p.p.m.) at 25d̀ C. In all four concentrations, newly laid eggs generally survived the longest time. Survival time decreased with age until hatching on the fourth day. Newly hatched fish (4–13 days old) survived the shortest time. Forty‐day‐old fish and adults (100 days old) survived slightly longer in the two highest concentrations. In the two lowest concentrations, 40‐day‐old fish survived as long as newly laid eggs, and many adults survived indefinitely. The threshold concentration of zinc was approximately 10 p.p.m. for adults and 1.3 p.p.m. for 40‐day‐old fish.