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    Incidence and causes of mass fish kill in a shallow tropical eutrophic lake (Laguna de Bay, Philippines)

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    Date
    2001
    Author
    Cuvin-Aralar, Maria Lourdes ORCID
    Santiago, Alejandro E.
    Gonzal, Angelito C.
    Santiago, Corazon B.
    Romana-Eguia, Maria Rowena
    Baldia, Susana F.
    Palisoc Jr., Fermin
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    Abstract
    Mass fish kills in Laguna de Bay, the largest lake in the Philippines, has been reported as early as in the 1930’s. With the introduction of and development of aquaculture in this lake, considerable attention and concern was focused on the problem. Records of mass fish kill in the lake mainly from unpublished sources and reports from fisherfolk were reviewed and the causes categorized. The data covered the period 1972 to 1998. Among the commercially important fish species affected were milkfish (Chanos chanos), Nile tilapia (Oreochromis niloticus), bighead carp (Aristichthys nobilis), snakehead (Channa striata), catfish (Clarias macrocephalus and C. batrachus, Arius manilensis), silver perch (Terapon plumbeus) and goby (Glossogobius giurus). The first three species are widely used in aquaculture and the rest are important in open water fishery. Sixty percent of mass fish kill incidents were due to low dissolved oxygen with more than half of these cases associated with blue-green phytoplankton blooms. Fish kills due to pollution from agriculture and industries, fish pathogens and other causes are also discussed. The incidence of mass fish kill reached its peak between 1977 to 1986. Records show that the most number of fish kills (80%) occurred between the months of May to September. The lakeshore towns in the central arm of the lake had the highest incidence of fish kill reported with 46% and followed by the west arm of the lake with 38% of all fish kills recorded.
    URI
    http://hdl.handle.net/10862/450
    Suggested Citation
    Cuvin-Aralar, M. L., Santiago, A. E., Gonzal, A. C., Santiago, C. B., Romana-Eguia, M. R., Baldia, S. F., & Palisoc Jr., F. (2001). Incidence and causes of mass fish kill in a shallow tropical eutrophic lake (Laguna de Bay, Philippines). In 9th International Conference on the Conservation and Management of Lakes. Conference proceedings (pp. 233–236). Shiga, Japan: Shiga Prefectural Government.
    Type
    Conference paper
    Subject
    Finfishes; Fish kills -- Philippines -- Laguna de Bay; Dissolved oxygen; Algal blooms; Pollution; Diseases; Geographical distribution; Periodicity; Philippines -- Laguna de Bay; Milkfish; Nile tilapia; Carp; Bighead carp; Perches; Silver perch; Catfishes; Gobiidae; Tilapia; Chanos chanos; Oreochromis niloticus; Aristichthys nobilis; Channa striata; Clarias macrocephalus; Clarias batrachus; Arius manilaensis; Terapon plumbeus; Glossogobius giurus
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    • Conference Proceedings [281]


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