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Effect of stocking density on growth performance of monosex Nile Tilapia (oreochromis niloticus) in the aquaponic system integrated with lettuce (Lactuca sativa)

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Aquaculture and Fisheries 2022年第3期7卷 328-335页

作者： Josiah Sabwa Ani julius o.manyala Frank o.Masese Kevin Fitzsimmons School of Natural Resources Department of Fisheries and Aquatic SciencesUniversity of EldoretEldoret30100Kenya School of Spatial Planning and Natural Resource Management Jaramogi Oginga Odinga University of Science and TechnologyBondo40601Kenya Department of Soil Water and Environmental Science College of Agriculture and Life SciencesUniversity of ArizonaTucson85721-0038ArizonaUSA

Aquaponics is a fish-plant recirculating system where nutrients received from the fish culture are absorbed by the plants for *** technology is relatively new for fish culture in Kenya,and the principles and operations remain largely untested for many fish *** study determined how stocking density affects the growth performance and water quality in a Nile tilapia-lettuce(Lactuca sativa)aquaponics *** experimental design included five replicates for each of the aquaponic systems stocked at densities of 150,300,and 450 fish/m^(3) for a rearing period of 56 *** treatment had a planting density of 16 lettuce/*** water quality parameters ranges during the rearing period were 3.83-5.35 mg/L for dissolved oxygen,7.44 to 7.6 for pH,0.014 mg/L to 0.032 mg/L for total ammonium nitrate(TAN),1.11-1.34 mg/L for nitrate,and 0.01-0.08 mg/L for nitrite,and all decreased with increasing stocking *** final weight of fingerlings was 25.2±4.2 g,32.0±3.8 g and 42.6±3.1 g for 450,300,and 150 fish/m^(3) *** growth rate(SGR)was reduced with increasing stocking density whereas food conversion ratio(FCR)increased with stocking *** systems with the lowest stocking densities performed better than 300 and 450 fish/m^(3) respectively.

关键词： Aquaponics Nile tilapia Lettuce Stocking density

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