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Combined effects of fertilization rate, manuring and feed pellet application on fish performance and water quality in polyculture ponds
Year:
1995
Source of publication :
Aquaculture Research
Authors :
Karplus, Ilan
;
.
Milstein, Ana
;
.
Volume :
26
Co-Authors:
Milstein, A., Fish & Aquaculture Research Station, Dor, Israel
Alkon, A., Fish & Aquaculture Research Station, Dor, Israel
Karplus, I., Fish & Aquaculture Research Station, Dor, Israel
Kochba, M., Faculty of Agricultural Engineering, Technion, Haifa, Israel
Avnimelech, Y., Faculty of Agricultural Engineering, Technion, Haifa, Israel
Facilitators :
From page:
55
To page:
65
(
Total pages:
11
)
Abstract:
This study analyses the combined effects of organic and inorganic fertilization and of feeding with pellets on fish performance and water quality in a polyculture of common carp. Cyprinus Carpio L., silver carp. Hypophthalmichthys molitrix (Val.), grass carp. Ctenopharyngodon idella (Val.) and hybrid tilapia, Oreochromis niloticus L. x O. aureus Stetndachner. Experiments included six treatments, which are combinations of inorganic fertilisation (daily or fortnightly), manuring (supplied or not), feed pellets (supplied or not) and density of phytoplanktivorous fish species (high‐density treatments with 50% more hybrid tilapia and 300% more silver carp than low‐density treatments). The effects of the management procedures on fish weight, growth, survival and yield. plankton abundance, water quality, and their complex interactions at the different levels of the natural food web were analysed. The hypothesis that daily fertilization should increase algal production, which in turn should sustain a higher density of phytoplanktivorous fish, proved to be correct within certain limits. Algal reproduction rate was higher under daily fertilization, pointing to better supply of food for herbivorous fish, while algal biomass was similar under both fertilization regimes, pointing to the utilization of that algal food supply. The increased algal food supply sustained a 50% density increase of the omnivorous tilapia, but not the 300% density increase of the grazer silver carp. Copyright © 1995, Wiley Blackwell. All rights reserved
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DOI :
10.1111/j.1365-2109.1995.tb00860.x
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21211
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:42
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Scientific Publication
Combined effects of fertilization rate, manuring and feed pellet application on fish performance and water quality in polyculture ponds
26
Milstein, A., Fish & Aquaculture Research Station, Dor, Israel
Alkon, A., Fish & Aquaculture Research Station, Dor, Israel
Karplus, I., Fish & Aquaculture Research Station, Dor, Israel
Kochba, M., Faculty of Agricultural Engineering, Technion, Haifa, Israel
Avnimelech, Y., Faculty of Agricultural Engineering, Technion, Haifa, Israel
Combined effects of fertilization rate, manuring and feed pellet application on fish performance and water quality in polyculture ponds
This study analyses the combined effects of organic and inorganic fertilization and of feeding with pellets on fish performance and water quality in a polyculture of common carp. Cyprinus Carpio L., silver carp. Hypophthalmichthys molitrix (Val.), grass carp. Ctenopharyngodon idella (Val.) and hybrid tilapia, Oreochromis niloticus L. x O. aureus Stetndachner. Experiments included six treatments, which are combinations of inorganic fertilisation (daily or fortnightly), manuring (supplied or not), feed pellets (supplied or not) and density of phytoplanktivorous fish species (high‐density treatments with 50% more hybrid tilapia and 300% more silver carp than low‐density treatments). The effects of the management procedures on fish weight, growth, survival and yield. plankton abundance, water quality, and their complex interactions at the different levels of the natural food web were analysed. The hypothesis that daily fertilization should increase algal production, which in turn should sustain a higher density of phytoplanktivorous fish, proved to be correct within certain limits. Algal reproduction rate was higher under daily fertilization, pointing to better supply of food for herbivorous fish, while algal biomass was similar under both fertilization regimes, pointing to the utilization of that algal food supply. The increased algal food supply sustained a 50% density increase of the omnivorous tilapia, but not the 300% density increase of the grazer silver carp. Copyright © 1995, Wiley Blackwell. All rights reserved
Scientific Publication
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