Now showing items 1-5 of 5

    • Article

      Evaluation of milkfish (Chanos chanos Forskal) and prawn (Penaeus monodon Fabricus) in polyculture system 

      BJ Pudadera Jr. & C Lim - Fisheries Research Journal of the Philippines, 1982 - Fisheries Research Society of the Philippines
      The growth, survival and profitability of milkfish (C. chanos ) and prawn (Penaeus monodon ) (averaging 3.1 g and 0.3 g, respectively) grown in five different combinations for 100 days in 500-m super(2) brackishwater ponds in the SEAFDEC Station at Leganes, Iloilo, Philippines were assessed. The treatments with three replicates each were (I) 2,000 milkfish/ha; (II) 4,000 milkfish/ha; (III) 6,000 prawns/ha; (IV) 2,000 milkfish with 6,000 prawns/ha; and (V) 4,000 milkfish with 6,000 prawns/ha. the competition of prawns to milkfish as expressed by the competition index (CI) was 0.03 and 0.15 compared to the competition exerted by milkfish to prawn (0.48 and 0.67). Mean weight gain of milkfish at 2,000/ha was significantly higher (L = 0.05) than those at 4,000/ha in both monoculture and polycuture systems. the monoculture of prawn (III) was significantly higher (L = 0.05) than that of prawns in polyculture with milkfish (IV and V). Likewise, prawns stocked with milkfish at a lower stocking density (IV) grew signficicantly faster than those at higher stocking density (V).
    • Book

      An improved traditional shrimp culture technique for increasing pond yield 

      P Kungvankij, LB Tiro Jr., BJ Pudadera Jr., IO Potestas & TE Chua - 1986 - Network of Aquaculture Centres in Asia
      Series: Aquaculture extension manual; No. 15
      Details are given of the technology required for an improved method of extensive shrimp (Penaeus monodon) culture, describing the following: grow out facilities, seed supply, pond preparation and management, harvesting and yield. A financial analysis is also included.
    • Conference paper

      Induced spawning and larval rearing of grouper (Epinephelus salmoides Maxwell) 

      P Kungvankij, LB Tiro Jr., BJ Pudadera Jr. & IO Potestas - In JL Maclean, LB Dizon & LV Hosillos (Eds.), The First Asian Fisheries Forum: proceedings of the First Asian Fisheries Forum, Manila, Philippines, 26-31 May 1986, 1986 - Asian Fisheries Society
      Broodfish of grouper (Epinephelus salmoides ) were induced to spawn by hormonal induction. The hormones used for this experiment were HCG + pituitary gland (PG) and LRH-a. The results showed that at dosages of 500 IU HCG + 3 mg of PG per kg of fish for first injection and 1,000 IU HCG + 3 mg of PG per kg of fish at the final injection at an interval of 24 hours, the treated fish spawned naturally in a spawning tank 12 hours after the final injection. At lower dosages of 500 IU HCG + 3 mg PG at 12-hour intervals or 500 IU HCG + 3 mg PG at 24-hour intervals or using 10 mg LRH-a at 12-hour intervals, the eggs can be artificially fertilized only by stripping. The larval rearing experiment was conducted in a 250-l fiberglass tank at the stocking density of 2,500 larvae per tank. Feeds used in this experiment were: (a) Isochrysis + sea urchin eggs; (b) Isochrysis + Brachionus ; and (c) Tetraselmis + Brachionus . The results showed that newly hatched larvae fed with Isochrysis mixed with sea urchin eggs and then Brachionus from day 10 had the best survival rate (9% at day 30).
    • Conference paper

      Integrated farming of broiler chickens with fish and shrimp in brackishwater ponds 

      BJ Pudadera Jr., KG Corre, E Coniza & GA Taleon - In JL Maclean, LB Dizon & LV Hosillos (Eds.), The First Asian Fisheries Forum. Proceedings of the First Asian Fisheries Forum, 26-31 May 1986, Manila, Philippines, 1986 - Asian Fisheries Society
      An experiment on the integrated farming of broiler chickens with milkfish (Chanos chanos), tilapia (Oreochromis niloticus) and shrimp (Penaeus indicus) in brackishwater ponds was conducted in 1,000-m2 ponds of the SEAFDEC Research Station at Leganes, Iloilo, Philippines. Tested were varying densities of tilapia (500, 1,000, 1,500 and 2,000 for Treatments I-IV, respectively) with fixed densities of 5,000 shrimp and 200 milkfish per 1,000-m2 pond. Poultry houses were constructed at the middle of each pond so that fresh chicken wastes would drop directly to the pond. Each unit was stocked with 90 broiler heads of three size groups, or a total of 180 heads for 120 pond culture days. Stocking, transfer and harvest of poultry were done every two weeks. Results indicated an average net production of shrimp of 19.15 to 28.38 kg/1,000 m2; milkfish, 7.51 to 11.74 kg/1,000 m2; tilapia, 33.68 to 66.97 kg/1,000 m2 and chicken broilers, 180.90 to 217.39 kg/1,000 m2. Statistical analysis revealed that the best net production of tilapia was obtained at a stocking density of 15,000/ha.
    • Book

      A prototype warm water shrimp hatchery 

      P Kungvankij, LB Tiro Jr., BJ Pudadera Jr., E Borlongan, ET Tech & TE Chua - 1989 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: NACA technology series; No. 4
      A description is given of the prototype warm water shrimp hatchery established and operated by SEAFDEC Aquaculture Department since 1982. Hatchery design, operation and management, larval rearing in small indoor tanks, larval rearing in large nursery tanks, routine hatchery management, harvesting and transportation and financial aspects are covered.