Now showing items 1-4 of 4

    • Conference paper

      Algal production and utilization relevant to aquaculture in the Philippines 

      JB Pantastico, JP Baldia, CC Espegadera & DM Reyes Jr. - In IJ Dogma Jr., GC Trono Jr. & RA Tabbada (Eds.), Culture and use of algae in Southeast Asia. Proceedings of the Symposium on Culture and Utilization of Algae in Southeast Asia, 8-11 December 1981, Tigbauan, Iloilo, Philippines, 1990 - Aquaculture Department, Southeast Asian Fisheries Development Center
      An outline is given of research conducted at the Aquaculture Department of SEAFDEC at Rizal, Philippines regarding algal culture and utilization. Culture methods for both brackishwater and freshwater algae are described and details given of applications of microalgae in the aquaculture industry, which include feed for fish and shrimp larvae.
    • Article

      Economics of microalgae (Chaetoceros calcitrans) production using the multi-step method in the Philippines 

      GPB Samonte, CC Espegadera & R Caturao - Aquaculture, 1993 - Elsevier
      The use of live microalgae for food during the early stages of the life cycle of shrimp larvae is considered essential. The microalga Chaetoceros calcitrans was mass produced at the Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC/AQD) using the multistep method. The alga was grown in batches using successively larger containers. A cell density of 2.65 × 106 cells/ml was obtained from the final 4-day culture of C. calcitrans. Production cost using this method was P715.50/ton (US$ 1.00=25 Philippine pesos). The minimal costs involved in this method make it an affordable technique for the mass culture of microalgae.
    • Article

      Fry-to-fingerling production of Tilapia nilotica in aquaria using phytoplankton as natural feed 

      JB Pantastico, C Espegadera & D Reyes - Kalikasan, The Journal of Philippine Biology, 1982 - University of the Philippines at Los Baños
      Two experiments were conducted to demonstrate the efficiency of phytoplankton as natural feed in fry-to-fingerling production of Tilapia nilotica . In the first experiment, growth and survival rates of fry given a sustained supply of algae increased considerably over the control fed with rice bran. In the second experiment, T. nilotica were grown in "green" water with phytoplankton concentrations adjusted to the following densities (cells/ml): high, 150-175 x 10 super(3); moderate, 90-120 x 10 super(3); and low, 50-60 x 10 super(3). Increasing the algal densities in the rearing medium enhanced growth of fry. Highest weight increments were obtained with high and moderate phytoplankton concentrations.
    • Article

      Gonad development of Placuna placenta Linnaeus fed Isochrysis galbana Parke, Tetraselmis tetrahele (G.S. West) Butch, or their combination 

      WG Gallardo, MTR de Castro, RT Buensuceso, CC Espegadera & CC Baylon - Aquaculture, 1992 - Elsevier
      A study was conducted to determine a suitable algal diet for the window-pane oyster, Placuna placenta Linnaeus, during gonad development. Sexually immature P. placenta (70 mm shell height) were fed Isochrysis galbana Parke, Tetraselmis tetrahele (G.S. West) Butch, or their 1:1 combination, at 100 000 cells per ml divided into two rations per day. Temperature and salinity ranged from 27 to 29 °C and 28 to 32 ppt, respectively. Monthly gonad histological examination showed a rapid gonad development in P. placenta fed the combination of I. galbana and T. tetrahele, attaining sexual maturity in the third month of rearing, a month ahead of those fed single algal species.