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  • Catla catla  (3)
  • 2020-2022  (3)
  • 1
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    On the effect of electrical field on Indian carps in captivity (2021)
    In:  http://aquaticcommons.org/id/eprint/16315 | 12051 | 2015-03-28 15:00:53 | 16315 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-03
    Description: Threshold current densities required for narcosis of fish in captivity differed in different species. Increased temperature of the water had greater effect on the fishes while changes of pH had no appreciable effect on narcosis in the fishes. Impulse currents of 50 V were found to have better effect on the fishes than continuous current of 180-220 V.
    Keywords: Fisheries ; electrical fishing ; Catla catla ; Labeo rohila ; Cirrhina mrigala ; Labeo calbasu ; Cirrhina reba ; Cyprinus carpio ; narcosis ; electrical treatment
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 91-97
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  • 2
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    On the response of Catla catla (Ham) and Cirrhinus mrigala (Ham) to the voltage gradient of electrical field (2021)
    In:  http://aquaticcommons.org/id/eprint/16314 | 12051 | 2015-03-28 15:01:31 | 16314 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-03
    Description: The threshold body voltage (voltage gradient between head and tail) required for first reaction, electro-taxis and electro-narcosis depended upon species, conductivity of the fish body, nature of current and wave shape. Larger fishes showed first reaction at a lower body voltage than smaller ones. All the three reactions were dependent on the accommodation of nerves to the electrical field and subsequent fatigue of the fishes. No significant change was observed in the period of narcosis and recovery after repeated stimulation.
    Keywords: Fisheries ; electrical fishing ; Catla catla ; Cirrhinus mrigala ; electro-narcosis ; electro-taxis ; electrical treatment
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 83-90
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  • 3
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    A new observation on large scale disintegration of eggs of Indian major carps during development (2021)
    In:  http://aquaticcommons.org/id/eprint/18194 | 12051 | 2015-10-14 05:23:03 | 18194 | Society of Fisheries Technologists, India
    Details
    Publication Date: 2021-07-06
    Description: While carp themselves may destroy carp eggs by sucking from outside the happa, destruction in the absence of carp also occurs. During observations of the effect of electrical field on developing carp eggs it was seen that the egg membrane ruptured prematurely under certain potential differences. In natural waters and mud potential differences occur in the presence of high concentrations of certain salts compared with the internal concentration. Temperature and pH fluctuations following strong sun or heavy rain accelerates the diffusion of ions along side water through the egg membrane. The egg cells expand rapidly and the embryos were rapidly dropped.
    Keywords: Aquaculture ; Biology ; Cyprinus carpio ; Labeo rohita ; Cirhina mrigala ; Catla catla ; eggs ; induced breeding ; develpoment
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 83-84
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