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Properties of common commercial fertilizers in aquaculture
https://www.globalseafood.org/advocate/properties-common-commercial-fertilizers/…exception of liquid ammonium polyphosphate, commercial fertilizers are solids consisting of granules or small prills. They are denser than water, but water soluble. Boyd, common fertilizers, Table 1 Compound N…
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Ammonia toxicity degrades animal health, growth
https://www.globalseafood.org/advocate/ammonia-toxicity-degrades-animal-health-growth/…percent. Boyd, Decimal fractions of ammonia nitrogen, Table 1 Temperature (° C) pHTemperature (° C) 16Temperature (° C) 18Temperature (° C) 20Temperature (° C) 22Temperature (° C) 24Temperature (° C)…
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Assessing the carbon footprint of aquaculture
https://www.globalseafood.org/advocate/assessing-carbon-footprint-of-aquaculture/…from human activities presently total about 40,000 million MT annually. Boyd, FAO estimates of end energy, Table 1 End UseEnergy Use (E.J.) Plant crops 12.8 Livestock 5.1 Fisheries and aquaculture…
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Estimating global shrimp pond area
https://www.globalseafood.org/advocate/estimating-global-shrimp-pond-area/…of shrimp pond area in Myanmar. Boyd, shrimp pond production, Table 1 CountryPond area (ha)Extensive production area (ha) Vietnam 619,000 562,000 China 421,000 35,000 Bangladesh 216,000 207,000 Ecuador 212,000 4,200…
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Estimación del área global de estanques de camarón
https://www.globalseafood.org/advocate/estimacion-del-area-global-de-estanques-de-camaron/…más confiable del área de estanques de camarón en Myanmar. Boyd, producción de camarones en estanques, Tabla 1 PaísÁrea de estanques (ha) Área de producción extensiva (ha) Vietnam 619,000 562,000…
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The Shrimp Book: Shrimp pond soil and water quality management
https://www.globalseafood.org/advocate/the-shrimp-book-pond-soil-water-quality-management/…limestone are shown in Table 1. Boyd, Recommended application rates, Table 1 Soil pHAgricultural Limestone Dose (kg/ha) Over 7.5 7.0-7.5 500 6.5-6.9 1,000 6.0-6.4 1,500 5.5-5.9 2,000 5.0-5.4 2,500 Below…
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Erosion, sedimentation in earthen aquaculture ponds
https://www.globalseafood.org/advocate/erosion-sedimentation-in-earthen-aquaculture-ponds/…types of soil. Boyd, Recommended side slopes, Table 1 Soil TypeSide Slope (horizontal: vertical) Clay, clay sand, sandy clay, silty sand 3:1 wet side Clay, clay sand, sandy clay, silty…
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Organic matter for pond fertilizer
https://www.globalseafood.org/advocate/organic-matter-pond-fertilizer/…much lower concentrations of nitrogen, phosphorus and potassium than those found in chemical fertilizers. Moreover, manures are not constant in composition like commercial chemical fertilizers. Boyd, Nutrient composition of organic…
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Sludge management at pangasius farm cuts discharges
https://www.globalseafood.org/advocate/sludge-management-pangasius-farm-cuts-discharges/…steer and horse manure. Its potassium concentration is greater than that of traditional manures. Boyd, Comparison of the plant nutrient, Table 1 MaterialNitrogen (%)Phosphorus (%)Potassium (%) Pangasius farm sludge 0.49…
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Dissolved oxygen concentrations in pond aquaculture
https://www.globalseafood.org/advocate/dissolved-oxygen-concentrations-pond-aquaculture/…levels (Table 1). Survival, production and FCR improved in response to higher minimum dissolved oxygen concentrations. Boyd, Effects of minimum daily dissolved-oxygen, Table 1 Average Minimum Dissolved-Oxygen Concentration (mg/L)Survival (%)Production…
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Pond fertilization reevaluated
https://www.globalseafood.org/advocate/pond-fertilization-reevaluated/…but there was little difference between the two-week and monthly applications. Boyd, Tilapia production, Table 1 Fertilizer Analysis (%) N – P2O5Tilapia Production (kg/ha) – 20 651 5 – 20…
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Protein conversion efficiency in aquaculture
https://www.globalseafood.org/advocate/protein-conversion-efficiency-in-aquaculture/…producing feed ingredients were not included in these estimates. Boyd, PCE, Table 1 SpeciesFCRFeed crude protein (%)Dress-out as fillets (%)Crude protein (%) filletCrude protein (%) whole fishProtein recovery (%) filletProtein…
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Lake, reservoir characteristics affect cage culture potential
https://www.globalseafood.org/advocate/lake-reservoir-characteristics-affect-cage-culture-potential/…Waters become more turbid with increasing phytoplankton abundance. Boyd, Water quality of lakes and reservoirs, Table 1 Trophic StatusTotal Nitrogen (mg/L)Total Phosphorus (mg/L)Chlorophyll a (ug/L)Secchi Disk Visibility (m) Oligotrophic Below…
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Calculating chemical treatments for aquaculture production
https://www.globalseafood.org/advocate/calculating-chemical-treatments-for-aquaculture-production/…specific gravity must be made for liquid products. Equations are provided in Table 1 for use in estimating pond treatment rates. An example is shown below. Boyd, Equations for calculating…
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Dissolved oxygen management in aquaculture
https://www.globalseafood.org/advocate/dissolved-oxygen-management-aquaculture/…Boyd, Solubility of oxygen (mg/l) as a function of temperature and salinity, Table 1 Temperature (° C)Salinity (ppt) 0Salinity (ppt) 5Salinity (ppt) 10Salinity (ppt) 15Salinity (ppt) 20Salinity (ppt) 25Salinity (ppt)…
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Nitrogen, phosphorus, eutrophication and effluent standards for aquaculture certification
https://www.globalseafood.org/advocate/nitrogen-phosphorus-eutrophication-effluent-standards-aquaculture-certification/…provided in Table 1. Boyd, eutrophication, Table 1 VariableOligotrophicMesotrophicEutrophic Total photophorus (ug/L) Annual mean 8.0 26.7 84.4 Range 30.0 – 17.7 10.9 – 95.6 16 – 386 Total nitrogen (ug/L)…
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Nitrógeno, fósforo, eutrofización y estándares de efluentes para certificación acuícola
https://www.globalseafood.org/advocate/nitrogeno-fosforo-eutrofizacion-y-estandares-de-efluentes-para-certificacion-acuicola/…1. Boyd, eutrofización, Tabla 1 VariableOligotróficoMesotrófico Eutrófico Fósforo total (ug/L) Media anual 8.0 26.7 84.4 Rango 30.0 – 17.7 10.9 – 95.6 16 – 386 Nitrógeno total (ug/L) Media anual…
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Thoughts on pond fertilization
https://www.globalseafood.org/advocate/thoughts-on-pond-fertilization/…of water clarity (Table 1). Boyd, pond fertilization, Table 1 Secchi disk reading (cm)Interpretation 60 cm Water is too clear. Inadequate productivity and danger of aquatic weed problems. Table 1….