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

2. Geographic distribution

6. Milkfish Chanos chanos

8. Cages for milkfish broodstock

10. Broodstock tank for milkfish

14. Multi-species hatchery used for milkfish

15. Bad eggs (sinking) Good eggs (floating)

17. 2-cell stage blastomere embryo hatchling

21. Artemia hatching tanks Brachionus culture tanks

22. Harvest of milkfish fry in the hatchery

23. Some hatchery-reared milkfish have deformities in the gill cover

24. 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

25. extensive, traditional system Pond Culture

26. Lablab

27. intensive system

28. Feeding of milkfish in intensive ponds

31. Pangasinan Davao Cage Culture ( marine cages )

32. Freshwater and marine pens Culture Pen

44. Feces Excreted matter Feed / Nutrient Wastes Uneaten feed Water Pollution

45. 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

51. Harvesting of milkfish

54. Stocking in cages

56. 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

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

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

62. Thank you !