A bibliography of parasites and diseases of marine and freshwater fishes of India

With the increasing demand for fish as human food, aquaculture both in freshwater and salt water is rapidly developing over the world. In the developing countries, fishes are being raised as food. In many countries fish farming is a very important economic activity. The most recent branch, mariculture, has shown advances in raising fishes in brackish, estuarine and bay waters, in which marine, anadromous and catadromous fishes have successfully been grown and maintained

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Not AvailableIncreased Metallothionein (MT) synthesis is associated with increased capacity for binding metals such as copper, zincand cadmium, as well as protection against metal toxicity. A study was carried out using quantitative real-time reversetranscriptase polymerase chain reaction (q-RT-PCR) in freshwater teleost, Channa punctata (Bloch), after exposure to sub-lethal concentrations of cadmium. Post 14 days exposure, the heightened MT mRNA expression was seen only in kidney, whereas in contaminated liver and gills, the MT gene expression collapsed significantly below the basal level.The difference in the effect of various concentrations of cadmium on MT mRNA transcript level in the tissues under study was found significant. The study indicates that the expression of MT mRNA in C. punctata occurs in tissue specific and dose dependent manner.University Grants Commission, New Delhi, Indi

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Not AvailableThe cytotaxonomic analyses of four species of genus Puntius, viz. P. chola, P. conchonius, P. sophore and P. ticto from central India was carried out for the first time. The metaphase chromosomes were prepared from kidney and gill tissues. The diploid chromosome number and karyotype formula (KF) were found to be 50 & 2m + 4sm + 2st + 42t in P. chola; 50 & 14m + 28sm + 8st in P. conchonius; 48 & 4m + 2st + 42t in P. sophore and 50 & 14m + 24sm + 8st + 4t in P. ticto. Based on KF, the fundamental arm number were determined as 56, 92, 52 and 88, respectively, for these species. The karyomorphological features indicated that P. conchonius and P. ticto are closely related and the same holds true for P. chola and P. sophore. The chromosomes of all the four species exhibited constitutive heterochromatic blocks at their centromeric position, as detected by Cbanding technique. Variations in number of NORs were observed with presence of single pair of NORs in P. chola and P. conchonius, whereas in P. sophore and P. ticto multiple NORs were observed. Thus, based on the karyological features it can be hypothesized that P. conchonius and P. ticto may be in advanced stage of karyo-evolution.UGC, New Delh