Browsing Conference Proceedings by Subject "Bighead carp"

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    • Acceptability of selected zooplankton and phytoplankton for growing larvae/fry of bighead carp (Aristichthys nobilis). 

      Baldia, Susana Fernando.; Pantastico, Julia Baldia.; Baldia, Jose Palmiano. (Proceedings of the Asian Symposium on Freshwater Fish Culture, 11-15 October 1985, Beijing, China, 1990)

    • Design and construction of a fishpen for an aquaculture-based social laboratory 

      Traviña, Vicente S. (ASEAN/UNDP/FAO Regional Small Scale Coastal Fisheries Development Project, 1986)
      A pilot project for the pen culture of Tilapia nilotica and bighead carp in an irrigation canal was initiated in Barangay Cauayan, Pototan, Iloilo. The project, Cauayan Social Laboratory, involves cooperators from the community and other government agencies with the aim of improving the quality of life of the rural poor while at the same time increasing fish production through aquaculture. Three barrier nets that contain the fish stock were set across the irrigation canal at 30 m distance to provide two culture areas. Six days after completion and stocking, however, despite all maintenance efforts, these structures collapsed due to heavy fouling — an environmental factor that was not foreseen. Giving due regard to this phenomenon, a modified design was constructed with provision for free passage of potential foulers and general flotsam that may be discharged in the irrigation canal. In addition, considerations were also given to maintenance work, especially the cleaning of fouled wire and mesh nettings used to enclose the cultured stock.

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

      Cuvin-Aralar, Maria Lourdes; Santiago, Alejandro E.; Gonzal, Angelito C.; Santiago, Corazon B.; Romana-Eguia, Maria Rowena ORCID; Baldia, Susana F.; Palisoc Jr., Fermin (Shiga Prefectural Government, 2001)
      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 Records of mass fish kill in the lake mainly from unpublished sources and reports from fisherfolk were reviewed and the causes categorized.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.