Nuvan (DDVP) is a member of organophosphorus compounds. It is extremely toxic to insects and is widely used as insecticides. Nuvan has been taken for the acute toxicity to a fresh water fish Channa punctatus LC50 value calculated for the acute toxicity, which were 0.024 ml/L. Histopathological study of kidney and liver after 24hr, 48hr, 72hr and 96hr exposure to acute toxicity of Nuvan. Treatme...

In an aquatic environment, there is a profound and inverse relationship between environment quality and disease status of fish. Parasites are one of the most serious limiting factors in aquaculture. Therefore, the present investigation has been undertaken to sort out the population dynamics of Pallisentis (Acanthocephala), in relation to host sex from freshwater fishes, Channa of Rohilkhand reg...

histopathology on the olfactory organ of a snakehead fish, channa punctatus (bloch, 1793) were assessed after exposing the fish to 2.5 mg/l and 5mg/l of cdcl 2 for 15 days, 30 days and 45 days. cellular organization of the epithelium was affected severely with degeneration of sensory and supporting cells and hyperplasia of basal cells and mucous cells. mucous cell proliferation indicates the up...

In this study, we examined the microbial population in different parts, gill, muscles and intestine region of Channa punctatus from two different fish culture farm. Based on their growth characteristics on specific culture media, the following human bacterial pathogen such as Achromobacter xylosoxidans (Gram +ve), Acinetobacter anitratus (Gram -ve), Bacillus subtilis (Gram +ve), Proteus vulgari...

Adult Channa punctatus were acutely exposed to LC50 of zinc (18.62 mg/l), cadmium (11.8 mg/l) and copper (0.56 mg/l) separately for 96 hr The concentration of metals was found maximum in liver and minimum in muscles. The degree of accumulation among the five tissues differed and it was in the order: gill>liver>kidney>blood>muscle in case of Zn, gills>kidney>blood> liver>muscle in case of Cd and...

Blood pyruvate level in the fingerlings of Channa punctatus when subjected upto 48 hours to 5.6 mg/l (a sublethal concentration) of hexavalent chromium exposure, revealed statistically no significant increase. However, a progressive significant increase in the blood pyruvate level was noticed upto 96 hours of exposure. The result may prove useful parameters to assess the hexavalent chromium tox...

activity of fresh neem leaf juice to immobilize, anaesthetize and fatal effect were studied against two live fish species, anabas testudineus and channa punctatus. the concentrations, 5, 10, 15 and 20% of neem leaf juice affected both the species, but a.  testudineus was found to be comparatively more susceptible to the treatment  than c.  punctatus . the time required to immobilize were 4 to >...

Glucose was administered to a fresh water teleost, Channa punctatus. Three groups of 40 fish each were injected intramuscularly with 2, 1 and 2 g/kg body weight glucose. Blood glucose level of the experimental fish was assayed according to Nelson (1944) at predetermined intervals, ranging from 0 to 120 hr post-injection. The principal islets were removed at autopsy and fixed for histological ex...

Pesticides are applied to control the pests indoor and outdoor; however, their remarkable amount reaches to the aquatic system through various routes like run-off, leaching, spray-drift, effluent from factories. These are reported to have negative metabolic impact on different non-target aquatic organisms like fishes. Thus, present study is aimed to evaluate the acute toxicity of two groups of ...