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  • 1
    Electronic Resource
    Electronic Resource
    Fungal diseases of fish in Nanak Sagar, Naini Tal, India (1995)
    Springer
    Mycopathologia 130 (1995), S. 71-74 
    Details
    ISSN: 1573-0832
    Keywords: Fish ; Fungal diseases ; Pathogenicity ; Watermolds
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Eight zoosporic fungi viz.,Achlya debaryana, A. flagellata, A. klebsiana, Aphanomyces laevis, Saprolegnia diclina, S. ferax, S. parasitica, andPythium sp. were isolated from a large number of adult fishes of the speciesMastacembelus armatus, Mystus vitatus, Nandus nandus, Tor putitora andT. tor of Nanak Sagar reservoir in Naini Tal district, India. Species of the parasites and the hosts were different in their pathogenicity and immunity, respectively. However,A. flagellata andS. parasitica appeared to be the most virulent. The severity of mycosis was primarily correlated to moderate water temperatures of 22–25 °C. High temperature (〉28 °C) retarded the disease process. The experimental inoculation with all the associated fungal species onPuntius conchonius in the laboratory produced clinical signs similar to the ones seen on infected fish in the reservoir. This is the first report on fish mycosis in the large reservoir located in the foot hill of Kumaun Himalaya.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01103452
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  • 2
    Electronic Resource
    Electronic Resource
    Efficiency of one- and two-stage selection indexes for improvement of net economic merit in White Leghorns (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 166-171 
    Details
    ISSN: 1432-2242
    Keywords: One- and two-stage selection indexes ; Relative efficiency ; Proportion selected ; White Leghorns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of varying intensities of selection at first and second stages, for a given final intensity, on the efficiency of two-stage index selection are described. Data collected on four White Leghorn strains for part and residual egg number, body weights at 20 and 40 weeks and egg weight at 39 to 40 weeks were utilised. Four of the five traits were used in the first stage and all five traits were used in the second stage for the construction of two-stage selection indexes. The index that utilised all five traits had the maximum efficiency for one-stage selection. The relative efficiency of the two-stage index increased with increase in proportion selected at the first stage. A practical breeding schedule that adds the advantage of reduced generation interval by utilising a two-stage index selection is suggested for egg type chickens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275317
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