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    The effects of water hardness on the hatching and viability of silver carp (Hypophthalmichthys molitrix) eggs

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    Date
    1987
    Author
    Gonzal, Angelito C.
    Aralar, Emiliano V.
    Pavico, Josefina Ma. F.
    Page views
    2,334
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    Abstract
    An investigation was conducted to establish water hardness concentration for optimum hatching of silver carp (Hypophthalmichthys molitrix) eggs. Eggs were incubated for 19 h at 26.5°C at six levels of water hardness: 100, 200, 300, 400, 500 and 600 mg/l CaCO3. Water absorption at 100–200 mg/l CaCO3 caused eggs to burst prematurely and minimal water absorption occurred at 600 mg/l CaCO3. Chloride concentration at 0 and 6 h post-fertilization was significantly related to egg hatchability. Total ammonia-nitrogen at 6 h, pH at 6 h, magnesium hardness at 18 h and chlorides at 18 h significantly influence viability of larvae. A water hardness of 300–500 mg/l CaCO3 is recommended for the successful hatching of silver carp eggs.
    URI
    http://hdl.handle.net/10862/1270
    Suggested Citation
    Gonzal, A. C., Aralar, E. V., & Pavico, J. M. F. (1987). The effects of water hardness on the hatching and viability of silver carp (Hypophthalmichthys molitrix) eggs. Aquaculture, 64(2), 111-118.
    DOI
    10.1016/0044-8486(87)90347-4
    Type
    Article
    ISSN
    0044-8486
    Subject
    Water hardness; Fish culture; Hatching; Survival; Fish eggs; Hypophthalmichthys molitrix
    Collections
    • Journal Articles [1108]


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