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EFFECT OF AN ABRUPT TRANSFER TO DIFFERENT SALINITIES ON ABILITY OF SALT TOLERANCE IN GOLDFISH CARASSIUS AURATUS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 45, Issue 3, 2014, Pages 247-251 | ||
| Authors | ||
| M. Sh. Al-Khashali; S. A. S. Al-Shawi | ||
| Abstract | ||
| This study carried out to investigate the effect of an abrupt increasing of salinity on survival rates and defining the Lethal concentration (LC50) which kills 50% of goldfish Carassius auratus. Fish at average weight 39.5 ± 2.5 g were exposed to different salt concentrations: 0.1, 4, 8, 12 and 16 g/l, where each concentration represented a treatment, while the first treatment represented as a control. The results showed that the survival rates of goldfish were 100% in 0.1, 4 and 8 g/l, while it was 40% and 0% in 12 and 16 g/l salt concentrations, respectively. The LC50 which killed 50% of goldfish was 10.96 g/l during 96 hours of an abrupt exposure to salt concentrations: 4, 8, 12 and 16 g/l. Fish were fed a diet contained 32% protein at a ratio 3% of fish body weight. | ||
| Keywords | ||
| Abrupt transfer; salinity; Goldfish | ||
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