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CONSULTANCY AND RESEARCH IN AQUACULTURE AND THE AQUATIC ENVIRONMENT

A Company in the NIVA-group. CONSULTANCY AND RESEARCH IN AQUACULTURE AND THE AQUATIC ENVIRONMENT. Assessing aquaculture production. Linking production to environmental impact. Production survey methods Physical count of structures and GPS marking Interviews on production Cage/pan volume

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CONSULTANCY AND RESEARCH IN AQUACULTURE AND THE AQUATIC ENVIRONMENT

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  1. A Company in the NIVA-group CONSULTANCY AND RESEARCH IN AQUACULTURE AND THE AQUATIC ENVIRONMENT Assessing aquaculture production

  2. Linking production to environmental impact Production survey methods • Physical count of structures and GPS marking • Interviews on production • Cage/pan volume • Stocking density, • Biomass • Feed rate • Satellite structure counting • Satellite boundary marking • Photograph analysis from land • Photograph analysis from air

  3. Digital maps – sea chart source

  4. Digital map – LGU source

  5. Digital maps – Satellite source

  6. Digital source – Satellite image

  7. Bolinao GIS final

  8. Fish Farm registration The coordinates of every fish farm are recorded and note taken if operational

  9. Bolinao fish cages

  10. Bolinao fish pens

  11. Bolinao and Anda

  12. Fish Farm registration - Bolinao • Fish Cages • Total 460 – 138 not operational • Fish Pens • Total 266 – 49 not operational • Mussel farms • Total 254 – 1 not operational

  13. Fish Cages

  14. Fish cages • In Bolinao, there were 460 fish cages of which 322 were operational (70%) and 138 were not operational (30%) and are stocked with milkfish (98%). There are 13,652,800 fry stocked at 2g size and are grown to a market size of 433 grams in 6.8 months. • The cages were stocked with 12,287,520 fish with an average size of 304 grams and have a stocking density of 15.4 kg/m3. The standing stock was 3,735 tonnes of fish. The fish are fed at 2.85% per day using 10,240 kg of feed per day. • A production cycle from stocking fry to harvest size is 6.8 months giving 1.76 crops per year per cage. The total production per cycle is 5,025 tonnes and the total production per year from cage culture is 8,844 tonnes.

  15. Fish Pens

  16. Fish Pens • There were 266 fish pens of which 217 were operational and 49 were not operational. There were 10,788,372 fry stocked at 2g size and are grown to a market size of 466 grams in 4.17 months. • The pens were stocked with 10,248,953 fish with an average size of 245 grams and have a stocking density of 1.04 kg/m3. The standing stock was 2,511 tonnes of fish The fish are fed at 5% per day using 117.2 tonnes of feed per day. • A production cycle from stocking fry to harvest size is 4.17 months giving 2.88 crops per year per pen. The total production per cycle is 5,776 tonnes and the total production per year from pen culture is 13,755 tonnes.

  17. Mussel and Oyster

  18. Mussel farms • There were 254 mussel farms of which 253 are operational and 1 is not operational. The total operational mussel farms have 253,000 poles with a total length of 885,500 meters of pole. The production per cycle from all the mussel farms is 1,645 tonnes. • There are 2 cycles per year giving a total production per year from mussel culture if 3,289 tonnes (extractive species).

  19. All structures

  20. All farms • The sea surface area in Bolinao is 28,882,031.86 m2 (not including the islands) ie 2,888 ha. • Production is therefore there was fish production of 7.8 tonnes of fish per ha and 1.14 tonnes of mussels.

  21. Dagupan river system - fish pens

  22. All structures

  23. Dagupan fish farm registration Fish Cages • Total 124 – 2 not operational Fish Pens • Total 553 – 126 not operational Fish Trap • Total 528 – 13 not operational Oyster farms • Total 94 – 1 not operational

  24. Fish Cages

  25. Fish pens

  26. Fish Trap

  27. Oyster farms

  28. Satellite analysis

  29. Taal Lake

  30. Satellite image – Google earth

  31. Enhanced satellite image

  32. Taal Lake – GPS boundary rergistration

  33. Fish cagesGPS boundary loggingSI boundary logging

  34. Lake Taal

  35. Sampalok analysis • 43.7 hectares of area • 1037 cages • 23.7 cages per hectare • Range 5 to 25 cages per ha (average 15/ha) • 1,170 hectares of cages • 4.89% of surface area covered with cages • Over 17,500 cages in Taal lake!

  36. Aerial photography

  37. Aerial Photos - distant

  38. Aerial Photos – close

  39. Aerial Photos – close

  40. Aerial Photos by Remote controlled drone

  41. Aerial Photos by Remote controlled drone

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