scholarly journals Effects of Salinity Variations on Acute Toxicity of Copper Sulphate against Oreochromis niloticus Fingerlings in Laboratory Bioassays

2013 ◽  
Vol 6 (6) ◽  
pp. 22-27
Author(s):  
Osuala, Fidelia ◽  
Keyword(s):  
Acute Toxicity ◽  
Oreochromis Niloticus ◽  
Copper Sulphate ◽  
Laboratory Bioassays ◽  
Salinity Variations

scholarly journals Salinity Influence on Copper Sulphate and Lead Nitrate Combined Toxicity Against Oreochromis niloticus

2020 ◽  
Vol 27 (1) ◽  
pp. 1-9
Author(s):  
F.I. Osuala ◽  
K.A. Bawa-Allah ◽  
N. Uba
Keyword(s):  
Heavy Metals ◽  
Binary Mixtures ◽  
Oreochromis Niloticus ◽  
Copper Sulphate ◽  
Aquatic Ecosystems ◽  
Lead Nitrate ◽  
Combined Toxicity ◽  
Safe Limits ◽  
Water Ecosystems ◽  
Laboratory Bioassays

Brackish water ecosystems characterized by fluctuating physicochemical parameters are more susceptible to the toxic effects of heavy metals acting singly or jointly. This study investigated the effect of salinity variations on the joint action toxicity of copper sulphate (CuSO4) and lead nitrate Pb(NO3)2 against fingerlings of Oreochromis niloticus. Fingerlings were exposed to binary mixtures of CuSO4 and Pb(NO3)2 (ratios 1:1 and 1:4) at varying salinities (0‰, 2‰, 12‰ and 18‰) in laboratory bioassays. The binary mixtures of the heavy metals were least toxic to the fish at 12‰ with 96 h LC50 values of 115.558 mg l-1 and 198.274 mg l-1 compared to 8.465 mg l-1 and 16.884 mg l-1 for 0‰, 46.084 mg l-1 and 69.843 mg l-1 for 2‰ and 13.196mg l-1 and 100.567 mg l-1 for 18‰ at ratios 1:1 and 1:4 respectively. Analysis using the Synergistic Ratio Model (SR) showed that both heavy metals were less toxic to the fish species when acting jointly irrespective of ratio than when acting singly at 12‰. Therefore, the need to consider the fluctuating salinity and joint interaction of heavy metals in setting ecologically safe limits for the discharge of effluents containing heavy metals into the aquatic ecosystems is important. Key words: Salinity, Heavy Metals, Toxicity, Oreochromis niloticus

Acute Toxicity of Lamda-Cyhalothrin and the Histopathological Changes of Gill and Liver Tissues of Tilapia (Oreochromis niloticus)

2019 ◽  
Vol 86 (sp1) ◽  
pp. 235
Author(s):  
Juliet Selvarani Arulraj ◽  
Padmavathy Pandurengan ◽  
Srinivasan Arasan ◽  
Sugumar Gopalrajan ◽  
Jawahar Paulraj
Keyword(s):  
Acute Toxicity ◽  
Oreochromis Niloticus ◽  
Histopathological Changes ◽  
Liver Tissues

scholarly journals Uji Toksisitas Akut Air Limbah Industri Sasirangan Terhadap Ikan Nila (Oreochromis Niloticus)

2019 ◽  
Vol 16 (1) ◽  
pp. 733
Author(s):  
Akhmad Yafi Kusuma ◽  
Rahmawati Rahmawati ◽  
Hardiono Hardiono
Keyword(s):  
Acute Toxicity ◽  
Water Body ◽  
Oreochromis Niloticus ◽  
Toxicity Test ◽  
Industrial Effluent ◽  
Probit Analysis ◽  
Control Group ◽  
Acute Toxicity Test ◽  
Control Group Design ◽  
Ammonia Content

Abstract: Toxicity Test Of Acute Industrial Waste Water On Tilapia Fish (Oreochromis Niloticus). The sasirangan industrial liquid wastes containing high ammonia and high pH when discharged into the receiving water body without treatment will result in changes in water quality and even the death of aquatic biota so that an acute toxicity test is necessary. This study aims to determine the value of LC50 from waste sasirangan against tilapiaI. This research used the experimental method of Post Control Only Control Group Design design. Samples taken as much as 100 liters of waste in one industry sasirangan existing in the city of Banjarmasin. Concentrations of the sasirangan waste solution to be used in the acute toxicity test are: 4, 8, 12, 16 and 20%. Parameters studied include ammonia, DO, pH, and temperature. To determine the value of LC50 using probit analysis. The results showed that LC50 for exposure time 24, 48, 72 and 96 hours were 14.73%, 10.21%, 8.26%, and 7.35%, respectively. The results of the analysis show that pH and ammonia content of industrial effluent sasirangan affect the death of tilapia fish. This research is hoped that the sasirangan industry does not dispose of its waste directly to the water body but needs to process it first. For further research it can complement the untested parameters such as BOD, COD, and TSS that affect fish survival.

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