Now showing items 1-20 of 27

    • Open Access

      Aquaculture practices and their impact on Philippine Lakes 

      Araullo, Dennis B. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      The rapid progress and development in the aquaculture sector during the past years has made an important contribution to the overall fish production in the Philippines. In 1996, 35.4% of the total fish production or 980,857 ...
    • Open Access

      Assessment of local government's implementation of open access policy in Taal Lake, Philippines: Effects on lake conservation and management 

      Mercene-Mutia, Ma. Theresa (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      The effects of local government's implementation of the current national policy on open access in municipal fisheries are assessed in terms of their impact on the fishery resources of Taal Lake. Local officials and fisherfolk ...
    • Open Access

      Autoecology of an endemic calanoid copepod: The first step in biodiversity conservation in Lakes 

      Palomar, Nadia E.; Mamaril, Augustus C. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Copepods, specifically calanoid copepods, play an important role in the productivity of aquatic ecosystems since they serve as a crucial link between primary producers and carnivores. In tropical reservoirs and lakes, they ...
    • Open Access

      Bathymetry and hydrobiology of Lake Mahagnao, Leyte 

      Francisco, Ruben A.; Pundavela, Menchie R.; Granali, Justerie M.; Tumabiene, Lea A.; Alpino, Julius P.; Elmido, Visitacion V. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Lake Mahagnao in Burauen, Leyte (10° 52.15' N and 124° 51.32' E) lies 26 m above sea level. It is surrounded by a mountain range that includes a dormant twin volcano. A bathymetric survey established 122 sampling stations ...
    • Open Access

      Biological monitoring in west bay, Laguna Lake: Phytoplankton composition and water pollution 

      Francisco, Jose C.; Perez, Teresita R. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Phytoplankton composition and density were studied in three (3) stations in West Bay, Laguna Lake. Blue-green algae and diatoms were the most abundant in terms of cell density. Green algae had the most number of species. ...
    • Open Access

      The decline of native fishes and fisheries and the rise of aquaculture in lakes and rivers in the Philippines 

      Bagarinao, Teodora ORCID (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      This paper reviews historical and recent data on biodiversity, fisheries, exotic fishes, and aquaculture in Philippine lakes and rivers. The country's lakes and rivers are poor in primary freshwater fishes because the ...
    • Open Access

      An ecological assessment of seven major lakes in the Philippines 

      Zafaralla, Macrina T. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      An ecological assessment was done on the seven major lakes in the Philippines, namely; Laguna de Bay, Taal, Naujan, Lanao, Mainit, Buluan, and Bato. The assessment was based largely on secondary data and some primary data. ...
    • Open Access

      An environmental assessment of the aquaculture potential of Lake Gawaan, Lake Lenneng and Lake Banao/Danum at the Mt. Province 

      Dang-awan, Rebecca G.; Estima, Martha; Gayagay, Petra; Pagtan, Aida; Ramos, Ma. Abegail A. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      This study reviews the existing conditions of the three Mt. Province lakes: Lake Gawaan, Lake Lenneng and Lake Banao/Danum. Three mechanisms were employed. First is the overview of the resource capabilities. This includes ...
    • Open Access

      Fish culture in cages in Lake Danao, Cebu 

      Tanduyan, Serapion N.; Bontia, Ponciano C. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Lake Danao is a picturesque inland body of water having an area of 685 ha located in the municipality of San Francisco in Pacijan Island, Camotes, Cebu. At the middle of the lake is a circular islet with an area of one ...
    • Open Access

      Fish in a man-made lake: what is there to eat? (Ecological studies in La Mesa Reservoir) 

      Abesamis, Rene A.; Mamaril, Augustus C.; Lopez, Nellie C. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Since 1975, a number of ecological studies have been done in La Mesa Reservoir (also known as La Mesa Dam or La Mesa Lake). Eight species of fish are known to occur in the lake; of these species, one is stocked to control ...
    • Open Access

      A freshwater red alga Compsopogon coeruleus (Balbis) Montagne from Bucal, Calamba, Laguna, Philippines 

      Intong, Lizbeth; Martinez-Goss, Milagrosa R. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Compsopogon coeruleus (Balbis) Montagne was observed for the first time along the shallow, flowing portions of the spring that occurs naturally in Bucal, Calamba, Laguna. A year-round study of some habitat conditions in ...
    • Open Access

      Impact assessment of cage culture in Lake Taal, Philippines 

      Alcañices, Marilyn M.; Pagulayan, Roberto C.; Mamaril, Augustus C. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      The environmental impact of cage culture on water quality of Lake Taal was assessed from March 1996 through February 1997. Three stations were considered namely: Balas, which serves as station 1 (non-cage area) and Sampaloc ...
    • Open Access

      Lake Lanao: Its past and present status 

      Rosagaron, Roman P. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Geographically located in Central Mindanao, Lake Lanao is the second largest lake in the Philippines. The lake is famous locally for its various uses and internationally for its endemic cyprinids. This paper intends to ...
    • Open Access

      Managing 'sinirapan' Mistichthys luzonensis Smith in Lake Buhi, Camarines Sur: Insights from its biology and population dynamics 

      Soliman, Victor S.; Sergio, M.F. Hassan A. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      The population dynamics and related aspects of the biology of 'sinarapan' Mistichthys luzonensis Smith, the world's smallest commercial fish, are used as basis in formulating management strategies for this goby in Lake ...
    • Open Access

      Mechanisms for lake formation in the Philippine archipelago 

      Punongbayan, Raymundo S.; Listanco, Eddie L. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Topographic depressions, which when filled with water become lakes, can originate in a number of ways as a result of volcanic processes and activities, crustal and fault movements, stream processes, dissolution of rocks, ...
    • Open Access

      A modelling of eutrophication in Laguna de Bay as a tool for rational resources management 

      Mitsumoto, Ikuro.; Santiago, Alejandro E. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      A lake model originally developed for Shin-Nippon Meteorological and Oceanographical Consultants Co., Ltd (METOCEAN) was used with modification to simulate the water quality of Laguna de Bay. The METOCEAN model made use ...
    • Open Access

      Parasitic crustaceans in fishes from some Philippine Lakes 

      Lopez, Nellie C. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Parasitic crustaceans are among the most harmful parasites of fishes. Certain species cause disease outbreaks and mortalities in aquaculture, facilities, and sometimes in natural systems, resulting in serious economic ...
    • Open Access

      Pasig River backflow and its effect on the water quality of Laguna de Bay, Philippines 

      Gonzal, Angelito C.; Santiago, Corazon B.; Afuang, Wally B. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      The backflow of Pasig River into Laguna de Bay was closely monitored beginning April 28, 1997 based on the expected high tide in Manila Bay and the average low lake level of 2.5 m in Station W (N 14°27.7'; E 121°08.5') ...
    • Open Access

      Preliminary observations on the diel feeding patterns of Nile tilapia Oreochromis niloticus (L.) in Laguna de Bay, Philippines, with the aid of the computer model MAXIMS 

      Richter, Hartmut; Focken, Ulfert; Becker, Klaus; Santiago, Corazon B.; Afuang, Wally B. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Nile Tilapia, Oreochromis niloticus, cultured in cages in Laguna de Bay, were sampled on two occasions in 1995, each time over a 24-hour cycle. The weights of stomach content were averaged and analysed with the computer ...
    • Open Access

      SEAFDEC contribution to the ecological awareness of Philippine Lakes 

      Platon, Rolando R. (Aquaculture Department, Southeast Asian Fisheries Development Center; Philippine Council for Aquatic and Marine Research and Development (PCAMRD), Department of Science and Technology; Bureau of Fisheries and Aquatic Resources, 2001)
      Since 1976 the Aquaculture Department of the Southeast Asian Fisheries Development Center (SEAFDEC/AQD), through its Binangonan Freshwater Station has been continuously involved in research on various aspects of inland ...