Effect of freshwater toxic and non toxic cyanobacteria, (Microcystis aeruginosa) strains on some biochemical parameters of Oreochromis niloticus

Abstract

Thirty six all male Oreochromis niloticus were divided into two groups, using six glass aquaria. The treated group was fed on a toxic strain of M. aeruginosa, while the control group was fed on a non toxic strain of M. aeruginosa, in order to measure their grazing rates from both strains of M. aeruginosa and consequently its effect on general fish health represented by, clinical signs, hematological changes and biochemical parameters. Grazing rates and daily intake of M. aeruginosa showed close grazing rates between the treated and the control groups with slightly higher intake of non toxic strain than the toxic one were the individual intake was 63,050 and 62,567 cell/ml/fish respectively. Clinical signs in O. niloticus associated with exposure to toxic cyanobacteria were investigated. The observed clinical signs were sluggish movement and reduced reflexes during the late stages of exposure period. Plasma glucose, cortisol, T4, creatinine and AST showed higher concentrations in the treated group than that in the control, indicating on increased fish stress that was reflected in its health state and consequently its performance. On the opposite side, plasma total protein concentration was higher in the control than that in treated group. The hematocrit, plasma albumin, LDH and Alkaline phosphatase concentrations did not show any significant difference in both groups. The study concluded that the uptake of toxic strain of M. aeruginosa via oral route had deleterious effects on some clinical and biochemical parameters of the blood of Nile tilapia which led finally affected the fish health. The study recommendations include prevention and monitoring of organic and inorganic pollution that promote the harmful algal blooms, and take the early preventive measures to avoid toxic effects of cyanobacteria on fish and consequently on humans.

Effect of Partial Substitution Spirulina Instead of Soybean Meal in Common Carp Cyprinus Carpio L. Diet on Some Blood Picture and Some Biochemical Criteria

“…While (29) and (30) not found negative effect of spirulina in the level of liver enzymes of tilapia fish Oreochromis niloticus. The effectiveness of these enzymes is an indication of the vital functions and effectiveness of the liver and therefore the effectiveness of these enzymes in fish serum within safe limits may be due to the role of spirulina in protecting the liver from cellular harm (7), as biochemical indicators of liver enzymes (ALT and AST) are affected with many internal and external factors (23). Generally, liver enzymes decreased for fish fed at spirulina compared with control diet.…”

Nutritional Effects of Dietary Spirulina (Arthrospora platensis) on Morphological Performance, Hematological Profile, Biochemical Parameters of Common Carp (Cyprinus carpio L.)

“…These findings of this investigation were in agreement with [33] that indicated a decrease in the level of ALT and AST enzymes. As previously recorded that biochemical markers of the liver (ALT and AST) in Oreochromis niloticus are influenced by this microalgae [34]. It is not doubt that the roles of spirulina acting as an antioxidant which prevent the formation of ion radicals [35].…”

Biochemical and histopathological effect of propolis and nanopropolis supplementation on alleviating dietary Microcystis aeruginosa toxicity on Nile tilapia, Oreochromis niloticus

“…(10-30µg/l) to microcystin. In contrast Marzouk et al (2013) recorded that ALP concentrations did not demonstrate any major distinction between O. niloticus fed toxic M. aeruginosa and control. Meanwhile fish groups fed with diet mixed with M. aeruginosa cells concomitant with propolis, and propolis nanoparticles showed reduced activities of serum ALT, AST, and ALP, than the group fed on diet mixed with M. aeruginosa and had relative values to the control groups.…”

“…Concerning to creatinine and urea which are classical monitoring indices for kidney function and renal structural integrity their values increased significantly in group of fish fed on diet mixed with M. aeruginosa cells compared to other groups. Marzouk et al (2013) reported higher concentrations in O. niloticus fed with toxic M. aeruginosa than control. The increment of creatinine level in the present experiment may indicate kidney damage or malfunction which confirmed more by elevation of urea upon feeding fish with M. aeruginosa.…”