Myxosporeans are best known for the diseases they cause in commercially important fish species. Identification of myxosporeans at the species-level is mainly based on conventional methods. The 18S rRNA gene sequence of morphologically identified Myxobolus orissae infecting the gill lamellae of mrigal carp Cirrhinus mrigala was characterized in the present study. The plasmodia of M.orissae were ...

Quantification of the essential amino acid requirements of a species is required for formulating optimal diets for cultivated fish. In this study, crystalline L-phenylalanine was used to determine the quantitative phenylalanine requirement of juvenile Cirrhinus mrigala. Test diets (40% crude protein) contained vitamin-free casein and gelatin supplemented with crystalline L-amino acids to provid...

Composite culture of edible fishes (common carp, Cryprinus carpio; silver carp, Hypopthalmithys molitrix, grass carp, Ctenopharyngodon idella; catla, Catla catla; rohu, Labeo rohita; and mrigal, Cirrhinus mrigala) in rice fields in the Cauvery delta of Tamil Nadu, southern India, resulted in 81.0% reduction in the immature mosquito population of anophelines and 83.5% of culicines. Analysis of f...

The effects of supplementing diets with levamisole on growth, immune response and resistance against pathogenic Aeromonas hydrophila were determined. Fish were assigned to three treatments with different level of levamisole (125, 250 and 500 mg kg ̄1 diet) and the control diet was prepared without levamisole. Cirrhinus mrigala were fed at 4% of their body mass for 60 days. Growth performance, en...

The present study reports the green synthesis of silver nanoparticles from leaves’ extract Mangifera indica (M. indica) and their antibacterial efficacy against Aeromonas hydrophila (A. hydrophila) in Cirrhinus mrigala (C. mrigala). prepared M. mediated (Mi-AgNPs) were found to be polycrystalline nature, spherical shapes with average size 62 ± 13 nm. C. (n = ±15/group) divided into six groups i...

In the present investigation histopathological lesions in the selected tissues such as gills, kidney and eye of the fingerlings of Cirrhinus mrigala exposed to a sublethal concentration of mercury, i.e. 240 μg/l from static bioassay have been studied. The primary gill lamellae showed degeneration in the middle and distal region. In distal region, spherical structure showing complete degeneratio...

Fish a protein, vitamin rich and fat deficient diet is considered as a vital brain food. Aquaculture has emerged to provide nutritional and food security to people. The three Indian major carps, namely, catla (Catla catla), rohu (Labeo rohita) and mrigal (Cirrhinus mrigala) are the major contributor of Indian aquaculture production. The use of probiotics in aquaculture is becoming increasingly ...