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Evaluation of organic tilapia culture in periphyton-based ponds
Year:
2005
Authors :
Harpaz, Sheenan
;
.
Milstein, Ana
;
.
Volume :
57
Co-Authors:
Milstein, A., Agricultural Research Organization, Aquaculture Department, Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Joseph, D., Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Peretz, Y., Extension Service, Aquaculture, Hadera, Israel
Harpaz, S., Agricultural Research Organization, Aquaculture Department, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
143
To page:
155
(
Total pages:
13
)
Abstract:
The introduction of hard surfaces in the water column to induce the growth of biofilms and periphyton on these surfaces is a method used to increase natural productivity of the water body and food for cultured aquatic organisms. In periphyton-based systems in Africa and Asia, substrate introduction and consequent periphyton development positively affected water quality and production of the target species. In Israel, this technology is being evaluated in the culture of organically produced tilapia. Among other restrictions imposed by organic standards, fish stocking densities must be low and only organic feeds and manures must be supplied. Organic pelleted feeds cost twice as much as regular aquaculture feeds. Since feed constitutes the major production expense, economic viability is hampered by using costly organic feeds. An experiment was performed at the Dor Aquaculture Station to explore methods of improving natural food production for tilapia and reducing added feeds. Submerged plastic surfaces equivalent to 40% of the pond surface area were immersed in polyculture ponds containing 85% hybrid tilapia (Oreochromis niloticus x O. aureus), together with a reduction of 40% of the amount of pelleted feed. The treatment improved nitrification and saved 40% of the feed costs, with only a 10% reduction in the tilapia growth rate and yield. These results indicate that periphyton-based aquaculture is an appropriate technology for reducing production costs and allowing economically viable organic tilapia production.
Note:
Related Files :
aquaculture1 (domain1)
Eurasia
Oreochromis niloticus
Organic tilapia culture
Periphyton
stocking density
Tilapia
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More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
29788
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:49
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Scientific Publication
Evaluation of organic tilapia culture in periphyton-based ponds
57
Milstein, A., Agricultural Research Organization, Aquaculture Department, Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Joseph, D., Fish and Aquaculture Research Station Dor, M.P. Hof HaCarmel 30820, Israel
Peretz, Y., Extension Service, Aquaculture, Hadera, Israel
Harpaz, S., Agricultural Research Organization, Aquaculture Department, P.O. Box 6, Bet Dagan 50250, Israel
Evaluation of organic tilapia culture in periphyton-based ponds
The introduction of hard surfaces in the water column to induce the growth of biofilms and periphyton on these surfaces is a method used to increase natural productivity of the water body and food for cultured aquatic organisms. In periphyton-based systems in Africa and Asia, substrate introduction and consequent periphyton development positively affected water quality and production of the target species. In Israel, this technology is being evaluated in the culture of organically produced tilapia. Among other restrictions imposed by organic standards, fish stocking densities must be low and only organic feeds and manures must be supplied. Organic pelleted feeds cost twice as much as regular aquaculture feeds. Since feed constitutes the major production expense, economic viability is hampered by using costly organic feeds. An experiment was performed at the Dor Aquaculture Station to explore methods of improving natural food production for tilapia and reducing added feeds. Submerged plastic surfaces equivalent to 40% of the pond surface area were immersed in polyculture ponds containing 85% hybrid tilapia (Oreochromis niloticus x O. aureus), together with a reduction of 40% of the amount of pelleted feed. The treatment improved nitrification and saved 40% of the feed costs, with only a 10% reduction in the tilapia growth rate and yield. These results indicate that periphyton-based aquaculture is an appropriate technology for reducing production costs and allowing economically viable organic tilapia production.
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