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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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The Value of Pig Manure as a Source of Nutrients for Semi-Intensive Culture of Nile Tilapia in Ponds (A Review)

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Agricultural Sciences 2014年第12期5卷 1182-1193页

作者： Christopher L. Brown Tingbao Yang kevin fitzsimmons Remedios B. Bolivar National Oceanic and Atmospheric Administration Aquaculture and Enhancement Division The Milford Laboratory Milford USA State Key Laboratory of Biocontrol and Center for Parasitic Organisms School of Life Sciences Sun Yat-sen University Guangzhou China Department of Soil Water and Environmental Science University of Arizona Tucson USA College of Fisheries Central Luzon State University Science City of Mu&ntildeoz Nueva Ecija Philippines

Growing global needs for food call for substantial increases in protein production in coming years, and for diligent conservation efforts. Manures from farm animals have been viewed both as a resource and as a waste product, but they are critically important sources of nutrients for organic and integrated farming and for traditional Asian aquaculture. Given constraints on livestock production and capture fisheries, careful development of the aquaculture industry is a necessity. The production volume and market share of tilapia are advancing extremely rapidly, and so too is the proliferation of misinformation and controversy. Culture and feeding practices differ widely, but feeding is usually recognized as the single largest cost to producers. Traditional Asian integrated farming practices involve the use of manures and other farm wastes to promote algae and zoo-plankton production, serving as a sole or supplemental nutrient source to the food chain that supports tilapia growout. Tilapia also ingest manures. The efficient use of nutrients from manures can have multiple benefits to integrated terrestrial agriculture and aquaculture, as long as product safety and quality are not compromised. With efficient use, handling of manures is simplified, fish production costs are reduced, fish nutrition can be improved, and potentially polluting materials are cycled constructively on integrated farms. Consumer and press reactions to the use of farm manures in food production can be highly polarized. Published responses cover a range of extremes, from enthusiastic endorsement to volatile reactions and outright rejection;in some areas this practice is considered to be more of a “PR (Public Relations) problem” than a health hazard. The perception in online public media that tilapia coming from ponds fertilized with manure are heavily contaminated with pathogens has not been supported by evidence. The perspectives of farmers in two major tilapia production areas (China and the Phil

关键词： Tilapia Manure Nutrition Phytoplankton Omega-3 Fatty Acids

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