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Aquaculture intensification under land and water limitations
Year:
1985
Source of publication :
GeoJournal
Authors :
Hepher, Balfour
;
.
Volume :
10
Co-Authors:
Hepher, B., Fish and Aquaculture Research Station, Dor, 30820, Israel
Facilitators :
From page:
253
To page:
259
(
Total pages:
7
)
Abstract:
Two intensive aquaculture systems are described in which high yields are obtained for relatively low inputs of land area, water and supplementary feed. The one is a polyculture of a number of fish species in deep cotton irrigation reservoires (5-7 m deep) in Israel. The large volume of water in these reservoirs improves the oxygen regime and dilutes catabolites excreted by the fish. This allows the increase of fish density to 10,000-18,000 fish ha-1. It also enables the increase of the resevoir's productivity by manuring with liberal amounts of animal wastes. Yields obtained in this system reach over 10 ton ha-1 yr-1 at very low feed conversion rates. The second system is practiced in Taiwan for the culture of red tilapia. Pond water is stirred mechanically by paddlewheels to create a gentle current around a central water outlet. This supplies ample oxygen and concentrates wastes in the center of the pond, from where it is removed twice daily, thus alleviating the build-up of catabolite concentration in the pond. Densities of fish amount to 215,000 to 430,000 fish ha-1, and the yields are accordingly high reaching more than 200 ton ha-1 yr-1. The ecological principles involved in these systems are discussed. © 1985 D. Reidel Publishing Company.
Note:
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DOI :
10.1007/BF00462126
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21149
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:41
Scientific Publication
Aquaculture intensification under land and water limitations
10
Hepher, B., Fish and Aquaculture Research Station, Dor, 30820, Israel
Aquaculture intensification under land and water limitations
Two intensive aquaculture systems are described in which high yields are obtained for relatively low inputs of land area, water and supplementary feed. The one is a polyculture of a number of fish species in deep cotton irrigation reservoires (5-7 m deep) in Israel. The large volume of water in these reservoirs improves the oxygen regime and dilutes catabolites excreted by the fish. This allows the increase of fish density to 10,000-18,000 fish ha-1. It also enables the increase of the resevoir's productivity by manuring with liberal amounts of animal wastes. Yields obtained in this system reach over 10 ton ha-1 yr-1 at very low feed conversion rates. The second system is practiced in Taiwan for the culture of red tilapia. Pond water is stirred mechanically by paddlewheels to create a gentle current around a central water outlet. This supplies ample oxygen and concentrates wastes in the center of the pond, from where it is removed twice daily, thus alleviating the build-up of catabolite concentration in the pond. Densities of fish amount to 215,000 to 430,000 fish ha-1, and the yields are accordingly high reaching more than 200 ton ha-1 yr-1. The ecological principles involved in these systems are discussed. © 1985 D. Reidel Publishing Company.
Scientific Publication
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