Milkfish breeding and culture techniques

Milkfish Breeding and Culture . Albert G. Gaitan Head, Igang Marine Station SEAFDEC/AQD, Tigbauan, Iloilo

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Multi-species hatchery used for milkfish

Bad eggs (sinking) Good eggs (floating)

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2-cell stage blastomere embryo hatchling

Artemia hatching tanks Brachionus culture tanks

Harvest of milkfish fry in the hatchery

Some hatchery-reared milkfish have deformities in the gill cover

Total 232,116 metric tons Brackishwater Ponds 195,877 mt Cages 3,326 mt Pens 4,437 mt Freshwater Ponds 27 mt Cages 2,863 mt Pens 8,724 mt Marine Cages 8,271 mt Pens 9,041 mt Milkfish production, Philippines, 2002

extensive, traditional system Pond Culture

Feeding of milkfish in intensive ponds

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Pangasinan Davao Cage Culture ( marine cages )

Freshwater and marine pens Culture Pen

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Feces Excreted matter Feed / Nutrient Wastes Uneaten feed Water Pollution

Maximum feed ration ??? Holding capacity / to prevent pollution Biomass ~ 0.8-1.3 tons/ha Feed ration > 50 kg/ha/day DO a.m. < 1.0 ppm Mortality Semi-intensive pond – No aeration

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Milkfish Culture in Marine Cages (Bolinao, Pangasinan ) 18 x 18 x 10 m 20 fish/cu.m. = 65,000/cage Initial size: 25 g Culture period: 229 days Harvest size: 500 g Production: 30 MT/cage SGR: 1.41%/day FCR: 2.58

Loading/transport of feeds to the site Feeding the whole day Changing of nets every week

Harvesting in net cages ,[object Object],[object Object]

Harvest From cage to chilling boat Sorting ...to market in Dagupan, Pangasinan or Navotas, Metro Manila Transport of harvest to mainland Bolinao

Milkfish breeding and culture techniques

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Milkfish breeding and culture techniques