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ACUTE TOXICITY STUDIES OF CADMIUM ON CRAB Sesarma quadratum (Decapoda) |  UTTAR PRADESH JOURNAL OF ZOOLOGY

An estuary is a brackish water feature that is partially contained along the coast, with one or more rivers or streams flowing into it and a free access to the open sea. Estuaries are an example of an ecotone, which is a transition zone between river and maritime habitats. Because many crustacean species live in estuaries, numerous research have been conducted to investigate the bioaccumulation and impact of various toxicants in these creatures. Heavy metals can build up in aquatic organisms’ tissues and induce a variety of harmful consequences on all organisms due to biomagnification. The goal of this study was to look at the acute toxicity of cadmium on crabs (Sesarma quadratum). Crab samples were subjected to varying amounts of cadmium (5, 10, 15, 20, and 25g/L) for 96 hours, and cumulative death was calculated in 24-hour intervals. SPSS 20 was used to analyse the data and provide a number of cumulative and fatal mortality rates.

Please see the link :- http://mbimph.com/index.php/UPJOZ/article/view/2591

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DETERMINATION OF MEDIAN LETHAL CONCENTRATION AND BEHAVIOURAL EFFECTS OF TRICLOSAN IN Heteropneustes fossilis | UTTAR PRADESH JOURNAL OF ZOOLOGY

Triclosan is an antibacterial ingredient that can be found in medical, household, and personal care products. Triclosan, a chlorinated phenolic chemical, ensures its presence in soil, surface water, drinking water, and other environments due to its extensive use and high persistence potential. Acute toxicity studies were performed on the fish Heteropneustes fossilis to determine the LC50 value of triclosan (5-chloro–2-(2,4dichlorophenoxy) phenol) over the periods of 24, 48, 72, and 96 hours, as well as to identify behavioural changes. Using Finney’s probit analysis
The LC50 values were discovered after analysis, and they were 9.54, 8.2, 7.59, and 7.14 mg/L for 24, 48, 72, and 96 hours, respectively. The fishes displayed erratic movement, increased surfacing activity, haemorrhagic eyes, reddish fins, decreased operculum motions, body tremors, increased mucous deposition all over the body, and a loss of equilibrium. These toxicity test findings revealed that triclosan is harmful to Heteropneustes fossilis.

Please see the link :- http://mbimph.com/index.php/UPJOZ/article/view/2448

HISTOCHEMICAL CHANGES IN THE INTESTINE OF Tilapia mossambica INDUCED BY ACUTE TOXICITY OF SODIUM FLUORIDE DURING SUMMER |UTTAR PRADESH JOURNAL OF ZOOLOGY

The objective of this study was to investigate the toxic effect of sodium fluoride (NaF) on freshwater fish, Tilapia (Oreochromis mossambica). Acute toxicity for 24, 48, 72 and 96 hrs. exposure of LCvalue was 30.0 ppm and LC50 value was 54.0 ppm for 96 hrs. The histochemical observation revealed that the neutral mucosubstances and glycogen content of intestine Tilapia mossambica showed a progressive decrease in staining intensity to Periodic acid Schiff (PAS) and Alcian blue pH-1 – Periodic acid Schiff (AB1- PAS) showed a progressive increase in purple blue staining showed increased acidic mucosubstances (sulfomucins) and decrease neutral mucosubstances and glycogen over time of exposure. The histochemical changes indicate sodium fluoride is toxic to growth and survival of the species.

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STRESS MARKERS AND BIOCHEMICAL ALTERATIONS DUE TO CAMINUM NANOPARTICLES EXPOSURE IN FISH Cirrhinus mrigala | UTTAR PRADESH JOURNAL OF ZOOLOGY

The present investigation carried out to determine the effect of cadmium Nano Particles (Cd NPs) on stress bio-markers assay in Cirrhinus mrigala (C. mrigala) fish fingerlings. The nanoparticles (NP) in fishes carried through the use of ion transporters or by endocytosis. Aquatic metal exposure may cause the deleterious effects to all aquatic organisms. The previous studies have shown that the NP were found to deposit in the liver of fishes. The C. mrigala fish fingerlings were acclimatized to laboratory conditions for 10days at a water temperature of 27 ± 2°C, before starting the experiment. They were fed ad libitum regular fish feed two times a day in the morning and evening. Bio-assays were carried out for 10 days.

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STRESS MARKERS AND BIOCHEMICAL ALTERATIONS DUE TO CAMINUM NANOPARTICLES EXPOSURE IN FISH Cirrhinus mrigala | UTTAR PRADESH JOURNAL OF ZOOLOGY

The present investigation carried out to determine the effect of cadmium Nano Particles (Cd NPs) on stress bio-markers assay in Cirrhinus mrigala (C. mrigala) fish fingerlings. The nanoparticles (NP) in fishes carried through the use of ion transporters or by endocytosis. Aquatic metal exposure may cause the deleterious effects to all aquatic organisms. The previous studies have shown that the NP were found to deposit in the liver of fishes. The C. mrigala fish fingerlings were acclimatized to laboratory conditions for 10days at a water temperature of 27 ± 2°C, before starting the experiment. They were fed ad libitum regular fish feed two times a day in the morning and evening. Bio-assays were carried out for 10 days. It was revealed that the LC50 value of Cd NP as 50 ppm in C. mrigala. A series of five different concentrations such as 20, 40, 60, 80,100 ppm of CdNP suspension with 100 nm in size was mixed intra peritoneally per kg of fish weight. The biochemical enzyme studies (i.e.) alkaline phosphatase, Lactate dehydrogenase (LDH) and Malate dehydrogenase (MDH) were estimated by standard procedures in tissues such as liver, and kidney. However, enzymes LDH and MDH showed the biochemical changes during the stress condition in the fish on nanoparticles exposure. The outcome result data were tabulated and statistically analyzed by Statistical Package for the Social Sciences version 16 (SPSS), one-way ANOVA (Analysis of Variance) used to observe the treatment effect. The present study reveals that the MDH enzyme level in the 2nd and 10th day in liver and kidney were 0.54±0.60; 0.9±0.15 and 0.24± 0.48; 0.41± 0.07 respectively. On 10th day the alkaline phosphatase intensity in the liver and kidney were 10.45± 03 and 10.24± 0.80 respectively.

Please read full article – http://mbimph.com/index.php/UPJOZ/article/view/1477

Keywords – Cadmium nanoparticles, acute toxicity, fish fingerlings, C. mrigala, stress markers, alkaline phosphatase, lactate dehydrogenase and malate dehydrogenase.