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No Thumbnail AvailableProjectPrimary studies on frequencies of fertilization of fish ponds
Establishment of a Network of Aquaculture Centres in Asia
1987Also available in:
No results found.One of the common practices in traditional Chinese fish culture is the utilization of animal manure in farming fish. Although qualitative and quantitative studies have been done on the principles of fish culture in manure-loaded ponds (1, 3, 4, 5), further research on the relationship between the methods of manuring and/or fertilizing and fish yields will be of help in furts er maximizing fish production -
No Thumbnail AvailableProjectProduction, yield characteristics and economics of polyculture of Macrobrachium rosenbergii and various fish species under pond condition
Establishment of a Network of Aquaculture Centres in Asia
1986Also available in:
No results found.The effect of two densities of freshwater prawn Macrobrachium rosenbergii on production,yield eristics and economics under polyculture system were examined in four ponds of 1.75 rai each during seven months growing period.Prawns stocked at about 2 (L.D) and 5 (H.D) tails per sq.m with the average weight of 3–4 g.Fish stocked in each ponds are as follows:225,500,350 and 1250 tails per pond for common carp,giant gouramy,bighead and silver carp respectively.The average production of fish in L.D and H.D amounted to 2,295 and 2,125 kg per ha respectively.Common carp had a highest growth,while silver carp and bighead were the lowest.There was an indication that the production in H.D was higher.The average production of prawn in L.D and H.D reached 722 and 910 kg per ha.It is considered that the stocking rate of common carp should be lower,since the pond productivity was not enough to support the growth of silver carp and bighead carp.It is observed that the production of fish was not affecte d by the different stocking densities of prawn.The survival rate of common carp was the highest(92%),followed by bighead carp (83%& 93%),silver carp (89% & 80%)and giant gouramy (76%& 73%).For the prawn it ranged from 49.1–61.1%,except one replicate in L.D which comprised 95%. This may probably be due to second restocking. The F.C.R of fish,based on the F.C.R of prawn (2.5),were 0.85 and 1.12 respectively in L.D and H.D.The average weight (g) of male prawn ranged widely in each category (43–102 g) compared to female prawn (29–51 g). The percentage in number of female prawn ranged 65–72% in both L.D and H.D. There is a positive relationship between stocking density and the percentage both in number ans weight of female prawn as well as the marketable yield. The marketable yield comprised about 87% of total biomass both in L.D and H.D.*** -
No Thumbnail AvailableBook (series)Proceedings of the FAO world symposium on warm-water pond fish culture - Rome, Italy, 18-25 May 1966. / Actes du symposium mondial organisé par la FAO sur la pisciculture en étang à température élevée - Rome, Italie, 18-25 Mai 1966 / Actas del simposio mundial de la FAO sobre piscicultura en estanques de agua templada - Roma, Italia, 18 a 25 de Mayo 1966 1967
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