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No Thumbnail AvailableProjectAn account of naturally occurring and artificially produced cyprinid hybrids in India
Establishment of a Network of Aquaculture Centres in Asia
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No results found.Several interspecific and interganeric hybrids of Indian major carps : Catla catla, Labeo rohita, Cirrhinus mrigala and Labeo calbasu (Chaudhuri 1959, 1971 & 1973; Naseem Hamza 1971; Naseem Hamza & Alikunhi, 1971; Varghese & Sukumaran, 1971; Chondar 1977) and those of Indian major carps with exotic carps viz. common carp (Alikunhi & Chaudhuri 1959; Kowtal & Gupta 1984, Khan et al; 1986 and Gupta et al; 1986) and silver carp (Ibrahim et al; 1980) have been artificially produced through hypophysat ion. From natural ecosystems such as reservoir and dry bundhs, several hybrids have been recorded (Desai & Rao, 1970; Tripathi et al; 1974, Tripathi and Sharaf 1974; Natarajan et al; 1976 & Prasad 1976). Many of these hybrids were found to be intermediate in characters of the parent species. Only a few hybrids, both artificially produced and naturally occurring, have been studied in detail for their cultural qualities and adaptability to various environments. In the present communication an ac count of economically important hybrids of Indian major carps have been given and their role in the development of reservoir fisheries as well as in increasing fish production in aquaculture has been discussed and use of hybrid index, multivariate techniques and genetic markers in identifying hybrids has been emphasised. -
No Thumbnail AvailableBook (series)Genetic resources of common carp at the Fish Culture Research Institute Szarvas, Hungary 2001
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No results found.The genetic resources of common carp maintained at the Fish Culture Research Institute in Szarvas, Hungary, are described. Eighteen Hungarian strains (landraces) and 13 strains from outside Hungary (primarily former Soviet Republics, Eastern Europe and Asia) are maintained in a living gene bank at the Institute. The genetic improvement of common carp in Hungary started in 1962 at the Fish Culture Research Institute. Traditional selection (family and mass selection), other types of genetic mani pulations, such as inbreeding, gynogenesis and hormonal sex-reversion, and intra-specific hybridization have resulted in the production and testing of more than 150 combinations of common carp strains. Five main features were evaluated that determined the economical value of the resulting strains: survival, weight gain, feed conversion ratio, slaughter value and fat content of the meat. These research efforts produced three outstanding hybrids of common carp: the Sz215 mirror, the SzP31 and SzP3 4 scaly hybrids, which now represent 80 percent of the total carp production in Hungary. The Fish Culture Research Institute is a key part of a national breeding programme in Hungary that provides fish farms and fish seed production units with parental lines of hybrid common carp. -
Journal, magazine, bulletinFAO Aquaculture Newsletter - December 1997 - No.17 1997
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No results found.FAO Aquaculture Newsletter (FAN) is issued three times a year in the form of printed newsletter by the FAO Fisheries and Aquaculture Department. It presents articles and views from the FAO aquaculture programme and highlights various aspects of aquaculture as seen from the perspective of both headquarters and the field programme. Articles are contributed by FAO staff from within and outside the Department, from FAO regional offices and field projects, by FAO consultants and, occasionally, by inv itation from other sources. FAN is distributed free of charge to all FAO member countries and has a current circulation of about 1 500 copies. It is also available online at: http://www.fao.org/fishery/publications/fan/
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