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APPENDIX III
LIST OF RESEARCH PROBLEMS* FOR LAGUNA DE BAY AND TRIBUTARY RIVERS Prepared by COORDINATING COMMITTEE ON COMPLEMENTARY RESEARCHERS FOR THE LAGUNA LAKE RESEARCH AND DEVELOPMENT PROGRAM NATIONAL SCIENCE DEVELOPMENT BOARD

  1. LIMNOLOGICAL STUDIES

    1. Physico-Chemical Studies

      1. Physical characteristics - temperature, water level, current, transparency, weather conditions, etc.

      2. Chemical characteristics - salinity, nutrients/ions, trace elements, etc.

      3. Morphology of the lake, including its tributary rivers

      4. Geology

      5. Sediments

    2. Plankton

      1. Productivity - quantitative, qualitative

        1. Biomass

        2. Chlorophyll

      2. Species/population diversity and succession in the lake

    3. Benthic organisms - worms, midges, etc.

      1. Population and distribution studies

  2. BIOLOGICAL STUDIES**

    1. Fisheries

      1. Fish productivity in relation to water quality

      2. Polyculture studies in fishpens

      3. Fry production and rearing studies

      4. Fish stock assessment

      5. Biology of important fish species

      6. Studies on fish pen designs and materials

      7. Identification of other areas in the lake suitable for fish culture

      8. Evaluation of different types of fishing gear used

      9. Fish handling and utilization

      10. Fish diseases and parasites

    2. Planktonic Organisms

      1. Culture of algae for feeds and other uses

      2. Control of undesirable plankton blooms

      3. Toxic substances in plankton

    3. Aquatic Plants

      1. Studies on productivity, control utilization of aquatic plants

        1. Eichhornia crassipes - water hyacinth

        2. Nymphea nouchali - water lily
        3. Hydrilla verticillata - “digman”
        4. Scirpus grossus - “tikiw”
        5. Pistia stratiotes - “quiapo”

        6. Vallisneria gigantea - “sintas-sintasan”

    4. Benthic species of direct commercial value - snails, clams, etc.

      1. Gear utilization and stock exploitation of snails and clams

      2. Studies on the productivity and utilization of snails and clams

      3. Biology of snails and clams

    5. Shrimps

      1. Studies on the productivity and population of shrimps

      2. Shrimp processing and handling

      3. Fry production and rearing studies

      4. Fish stock assessment

      5. Biology of important fish species

      6. Studies on fish pen designs and materials

      7. Identification of other areas in the lake suitable for fish culture

      8. Evaluation of different types of fishing gear used

      9. Fish handling and utilization

      10. Fish diseases and parasites

    1. Planktonic Organisms

      1. Culture of algae for feeds and other uses

      2. Control of undesirable plankton blooms

      3. Toxic substances in plankton

    2. Aquatic Plants

      1. Studies on productivity, control utilization of aquatic plants

        1. Eichhornia crassipes - water hyacinth

        2. Nymphea nouchali - water lily
        3. Hydrilla verticillata - “digman”
        4. Scirpus grossus - “tikiw”
        5. Pistia stratiotes - “quiapo”

        6. Vallisneria gigantea - “sintas-sintasan”

    3. Benthic species of direct commercial value - snails, clams, etc.

      1. Gear utilization and stock exploitation of snails and clams

      2. Studies on the productivity and utilization of snails and clams

      3. Biology of snails and clams

    4. Shrimps

      1. Studies on the productivity and population of shrimps

      2. Shrimp processing and handling

      3. Study on the efficiency of the different shrimp fishing gears

      4. Biology and taxonomy of shrimps

    5. Aquatic Insects

      1. Relation of insects to the biota of the lake

      2. Biology and taxonomy of aquatic insects in the lake

      3. Relation of ecological factors to population and distribution density of aquatic insects

      4. Control of aquatic insects

  3. POLLUTION SOURCES AND CONTROL

    1. Identification of pollutants in lake water

      1. Industrial Sources

        1. Oil refinery
        2. Power plant

        3. Industrial plants, factories, etc.

  4. Agricultural and Fisheries Sources

    1. Fertilizers
    2. Pesticides
    3. Animal feed lots
    4. Sedimen tation and siltation

    5. Fishpens

  5. Community Sources

    1. Sewage
    2. Detergents

    3. Oil

  6. Extent of pollution

    1. Industrial pollution sources

    2. Agricultural and fisheries sources

    3. Community sources

  7. Effects of pollution on aquatic life, productivity and water quality

    1. Industrial wastes

    2. Agricultural and fisheries wastes

    3. Domestic wastes

  8. Pollution abatement and waste treatment processes

    1. Industrial pollution

    2. Agricultural and fisheries pollution

    3. Domestic pollution

  9. Pollution monitoring

    1. Industrial pollution

    2. Agricultural and fisheries pollution

    3. Domestic pollution

  10. INVENTORY AND UTILIZATION OF RESOURCES

    1. Domestic and Industrial Water Supply

      1. Pilot water treatment plant

  11. Environmental impact of resources development

    1. Effect of the hydraulic control structure and Mangahan floodway on the ecology of the lake

    2. Ecological impact of fishpen operations

    3. Ecological impact of geothermal power generation

    4. Ecological impact of power generation activities on the lake and its watershed

  12. Duck Raising Industry

    1. Improved management practices in duck raising

  13. Power Generation

  14. Navigation

    1. Studies on allowable navigational activities in the lake

  15. Recreation

    1. Studies on allowable recreational activities, including identification thereof

  16. Irrigation

  17. SOCIO-ECONOMIC RESEARCH

    1. Socio-economic survey of lake fishermen

    2. Socio-economic survey of duck raising around the lake

    3. Pilot community waste treatment

    4. Pilot cooperative fishpens

    5. Socio-economic survey of the fishpen industry

* Research problems are ranked according to priority under each discipline and general area, November 12, 1975.

** Research problems under the area of Biological Studies are arranged according to priority irrespective of disciplines as contained in Annex A.

Priority Listing for Biological Studies

  1. Fish productivity in relation to water quality

  2. Polyculture studies in fishpens
  3. Fry production and rearing studies
  4. Fish stock assessment
  5. Culture of algae for feeds and other uses

  6. Studies on productivity, control, utilization of aquatic plants

    1. Eichhornia crassipes - water hyacinth
    2. Nymphea nouchali - water lily
    3. Hydrilla verticillata - “digman”
    4. Scirpus grossus - “tikiw”
    5. Pistia stratiotes - “quiapo”

    6. Vallisneria gigantes - “sintas-sintasan”

  7. Gear utilization and stock exploitation of snails and clams
  8. Studies on the productivity and population of shrimps
  9. Biology of important fish species
  10. Studies on fishpen designs and materials
  11. Control of undesirable plankton blooms
  12. Shrimp processing and handling
  13. Identification of other areas in the lake suitable for fish culture
  14. Evaluation of different types of fishing gears used
  15. Study on the efficiency of the different shrimp fishing gears
  16. Studies on the productivity and utilization of snails and clams
  17. Fish handling and utilization
  18. Fish diseases and parasites
  19. Relation of insects to the biota of the lake
  20. Toxic substances in plankton
  21. Effect of aquatic plants on fish production
  22. Biology and taxonomy of shrimps
  23. Biology of snails and clams
  24. Relation of ecological factors to population and distribution density of aquatic insects
  25. Biology and taxonomy of aquatic insects
  26. Taxonomy and ecology of some aquatic macrophytes

  27. Control of aquatic insects

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