scholarly journals Respiratory Surveillance and Ca2+-ATPase Enzyme Activity Studies of Clarias gariepinus Exposed to Acute Toxicity of Cyanide

2016 ◽  
Vol 50 ◽  
pp. 62-69
Author(s):  
Kadiri Oseni
Keyword(s):  
Enzyme Activity ◽  
Oxygen Consumption ◽  
Acute Toxicity ◽  
Freshwater Fish ◽  
Aquatic Ecosystems ◽  
Clarias Gariepinus ◽  
Potassium Cyanide ◽  
Strong Relationship ◽  
Short Term ◽  
Consumption Index

Potassium cyanide, a highly contaminating and toxic aquatic ecosystems pollutant was investigated for acute toxicity on the freshwater fish Clariasgariepinus. Its effect on the Ca2+ -ATPase activities in the liver, gills, muscle and intestinal tissues and oxygen consumption index was studied. Short-term toxicity test was carried out by static renewal bioassay test over a 96 h period using a lethal concentration (LC50) value of 0.361mg/mL. Potassium cyanide was highly toxic to the animal tested. Results reveal that normal respiratory activity (O2 consumption) of the fish was significantly affected and there was significant decreased in the Ca2+ - ATPase activities at the end of exposure periods (24, 48, 72 and 96 h). Correlation analysis reveals a strong relationship between oxygen consumption index and ATPase enzyme activity of Clariasgariepinus exposed to the toxicant. This study reflects the toxic effect of potassium cyanide to the freshwater fish, Clariasgariepinus and suggestion on the possible application of Ca2+ -ATPase activities and oxygen consumption index as possible biomarkers for early detection of cyanide poisoning in aquatic bodies.

scholarly journals Acute and Sub Lethal Effect of Potassium Cyanide on the Behaviour and ATPase Enzyme Activity in the Freshwater Fish, Clarias gariepinus (Catfish)

2015 ◽  
Vol 49 ◽  
pp. 50-57
Author(s):  
Kadiri Oseni
Keyword(s):  
Enzyme Activity ◽  
Freshwater Fish ◽  
Clarias Gariepinus ◽  
Potassium Cyanide ◽  
Lethal Effect ◽  
Body Colour ◽  
Behavioural Changes ◽  
Early Signal ◽  
Cyanide Intoxication ◽  
Static Bioassay

The Present research studies the acute sub lethal toxicity of potassium cyanide (KCN) in the fresh water, Clarias gariepinus and the effects on its behaviour and the Na+ - K+ ATPase enzyme activity. Acute toxicity of potassium cyanide (free cyanide) to the freshwater fish was studied using static bioassay method over a period of 96 h. Different concentrations of the toxicant (KCN) were used and LC50 value was found to be 361μg/L. Behavioural changes when exposed to lethal concentration of KCN showed increased feed intake, cannibalism, irregular swimming activity, rapid jerk movement, aggressiveness, loss of balance, opercula movement, surface behaviour, loss of equilibrium, change in body colour and convulsion. The effect of potassium on the Na+ - K+ ATPase of various physiological tissues which includes the gill, liver, muscles and intestinal over duration 0f 12 h-35 days were also studied. Cyanide intoxication resulted in marked changes in ATPase, shown by significant decrease in the enzyme activities. The result shows that ATPase enzyme together could be employed as a sensitive and useful biomarkers for cyanide pollution while the behavioural changes could be an early signal of toxicity.

Particulate light absorption and the prediction of phytoplankton biomass and planktonic metabolism in northeastern Spanish aquatic ecosystems

2000 ◽  
Vol 57 (1) ◽  
pp. 25-33 ◽  
Author(s):  
C M Duarte ◽  
S Agustí ◽  
J Kalff
Keyword(s):  
Absorption Coefficient ◽  
Light Absorption ◽  
Aquatic Ecosystems ◽  
Coastal Lagoons ◽  
Strong Relationship ◽  
Community Respiration ◽  
Chl A ◽  
Light Absorption Coefficient ◽  
Alpine Rivers ◽  
Detrital Particles

Examination of particulate light absorption and microplankton metabolism in 36 northeastern Spanish aquatic ecosystems, ranging from alpine rivers to inland saline lakes and the open Mediterranean Sea, revealed the existence of general relationships between particulate light absorption and the biomass of phytoplankton and microplankton metabolism. The particulate absorption spectra reflected a dominance of nonphotosynthetic, likely detrital, particles in rivers and a dominance of phytoplankton in coastal lagoons. There was a strong relationship between the light absorbed by phytoplankton and the chlorophyll a (Chl a) concentration of the systems, which indicated an average (±SE) Chl a specific absorption coefficient of 0.0233 ± 0.0020 m2·mg Chl a-1 for these widely diverse systems. Chl a concentration was a weaker predictor of the total particulate light absorption coefficient, pointing to an important role of nonphytoplanktonic particles in light absorption. Gross production was very closely related to the light absorption coefficient of phytoplankton, whereas community respiration was strongly correlated with the total particulate light absorption coefficient, indicating the optical signatures of sestonic particles to be reliable predictors of planktonic biomass and metabolism in aquatic ecosystems.

Short term exposure of pendimethalin induces biochemical and histological perturbations in liver, kidney and gill of freshwater fish

2016 ◽  
Vol 63 ◽  
pp. 29-36 ◽  
Author(s):  
Heena Tabassum ◽  
Mohammad Ashafaq ◽  
Jasim Khan ◽  
Md. Zahir Shah ◽  
Sheikh Raisuddin ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Short Term ◽  
Short Term Exposure

Description of Freshwater Fish Traditional Smoking in the Western Region, Cameroon

2021 ◽  
Vol 14 (1) ◽  
pp. 61-64
Author(s):  
Felix Meutchieye ◽  
Henri Grisseur Djoukeng ◽  
Youssouf Jamilou Ngouyamsa ◽  
Yacouba Manjeli
Keyword(s):  
Ethnic Group ◽  
Freshwater Fish ◽  
Oreochromis Niloticus ◽  
Clarias Gariepinus ◽  
Small Scale ◽  
African Catfish ◽  
Economic Activities ◽  
Fresh Fish ◽  
Hygiene Measures ◽  
Average Quantity

Western Cameroon is one of the regions most in needs of innovative and healthy solutions for freshwater fish conservation. This study aimed at evaluating the socio-economical characteristics of fish smokers and technical factors on the species smoked in the Noun Division. A total of 91 fish smokers were chosen. The socio-economic data were on age, gender, religion, number of dependents, marital status, ethnic group, education level, economic activities, smoking goals and workforce. The results of this study showed that fish smoking is practiced mainly by women (70%) which is common in Sub Sahara Africa small scale fish sector. The smokers are aged from 20 to 50 years (80%), married (92.2%) and taking care of a family of 1 to 10 persons (80%). These smokers are Muslim (74%), belonging to the Bamoun ethnic group (81%). They were also involved in other activities: agriculture (29%) and trade (1%). About 67% of the sampled smokers’ population had an experience of more than 10 years in the domain. The Purpose of smoking was largely sales (97%) and subsistence (3%). Nile tilapia (Oreochromis niloticus) was the most smoked species (36%), followed by African catfish (Clarias gariepinus) with a proportion of 32%. The average quantity of fresh fish smoked was 110 kg/day/smoker, with Oreochromis niloticus being more produced (60±4.74 kg/day/smoker). With regard to the smoking techniques used, hygiene measures were poorly respected. The major constraints revealed by the survey were that freshwater’s traditional fish smoking activities in Noun Division are influenced by gender, economic and cultural background. There is a lack of technical support material and financial means. Any implications for future investigations on health and food safety will be suitable for fresh fish smokers and the entire consumers.

Effect of short-term energy intake level and exercise on oxygen consumption in men

1986 ◽  
Vol 55 (2) ◽  
pp. 198-201 ◽  
Author(s):  
J. F. Hickson ◽  
G. H. Hartung ◽  
T. D. Pate ◽  
S. C. Kendall ◽  
J. C. McMahon ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Energy Intake ◽  
Short Term ◽  
Intake Level ◽  
Term Energy
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