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Land and water use issues in aquaculture
https://www.globalseafood.org/advocate/land-and-water-use-issues-in-aquaculture/?_rt=MTQ1fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=8198f74c33…equal total water use. Aquaculture production units can be classified according to their requirements for land and water as shown in Table 1. Boyd, Water use in aquaculture production systems,…
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Water quality standards: pH
https://www.globalseafood.org/advocate/water-quality-standards-ph/?_rt=MTQ2fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=38647a73e9…range 7 to 8.5. Boyd, Effect of pH on aquatic organisms, Table 1 pHResponse 4 Acid death point 4-5 Acid stress, no reproduction, slow growth 5-6 Acid stress, reproduction may…
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Water quality standards: Total phosphorus
https://www.globalseafood.org/advocate/water-quality-standards-total-phosphorus/?_rt=MTQ3fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=c30e83921e…form. Boyd, Typical inputs and outputs of phosphorus, Table 1 Phosphorus InputsPhosphorus Outputs Feed 90% Shrimp 25% Inflowing Water 10% Soil Uptake 65% Effluent 10% Table 1: Typical inputs and…
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Water quality standards: Total Ammonia Nitrogen
https://www.globalseafood.org/advocate/water-quality-standards-total-ammonia-nitrogen/?_rt=MTQ4fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=742e256dcc…ponds at harvest (Table 1). Boyd, Typical inputs and outputs of nitrogen, Table 1 InputsInputsOutputsOutputs Feed and fertilizer 90% Shrimp harvest 25% Water supply and nitrogen fixation 10% Denitrification 12%…
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Formulating standards for effluent management
https://www.globalseafood.org/advocate/formulating-standards-for-effluent-management/?_rt=MTQ5fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=d1bc98bb87…regarding permissible concentrations of selected water quality variables. Examples of concentration- based criteria in a water quality standard are noted in Table 1 below. Boyd, Concentration-based criteria in a water…
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Water use in aquaculture
https://www.globalseafood.org/advocate/water-use-in-aquaculture/?_rt=MTUwfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=0bba04a510…more efficiently than other terrestrial, irrigated agriculture, even in arid climates. Boyd, water use, Table 1 ClimateInflow (mm/yr) Wet 900 Table 1. Inflow necessary to maintain water levels in levee…
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Farm effluent during draining for harvest
https://www.globalseafood.org/advocate/farm-effluent-during-draining-for-harvest/?_rt=MTUxfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=1440593bb5…exchange. Boyd, Amount of effluent from different water exchange rates, Table 1 Average Daily Water Exchange (% Pond Volume)Exchange Effluent Volume (m3/ha per Crop) 2 24,000 5 60,000 10 120,000…
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Water composition and shrimp pond management
https://www.globalseafood.org/advocate/water-composition-and-shrimp-pond-management/?_rt=MTUyfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=dc8e9f8f09…concentration of 142 milligrams per literis equivalent to a total alkalinity of 116 milligrams per liter. Boyd, Average concentrations of major dissolved substances, Table 1 SubstanceSeawater (mg/l)River Water (mg/l) Chloride…
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Management of shrimp ponds to reduce the eutrophication potential of effluents
https://www.globalseafood.org/advocate/management-of-shrimp-ponds-to-reduce-the-eutrophication-potential-of-effluents/?_rt=MTUzfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=610d385dcb…but the true ratio based on dry matter is 1:4.4. Boyd, Table 1 ProductionN (kg/ha)P (kg/ha) 500 6.3 – 10.5 0.9 – 1.8 1,000 12.6 – 21 1.8 – 3.6…
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A comparison of resource use in shrimp farming, part 2: Water
https://www.globalseafood.org/advocate/a-comparison-of-resource-use-in-shrimp-farming-part-2-water/?_rt=MTU0fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=c572e1ecdd…21 percent in India (Table 1) with a weighted average for the five countries of 8.0 percent pond volume per day. Boyd, Water Use, Table 1 Water use (cubic meters…
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Evaluation of a commercial microbial enhanced protein in European sea bass diets
https://www.globalseafood.org/advocate/evaluation-of-a-commercial-microbial-enhanced-protein-in-european-sea-bass-diets/?_rt=MTU1fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=c28d05c799…semana. La tabla muestra los valores de WG reales y los valores de WG sugeridos para facilitar el manejo de la alimentación. Boyd, Proteins, Table 1 Source of meatCrude protein…
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Common salt a useful tool in aquaculture, part 2
https://www.globalseafood.org/advocate/common-salt-a-useful-tool-in-aquaculture-part-2/?_rt=MTU2fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=a7a9d9f6a8…at least 6:1. Boyd (1998) suggested a simple equation to determine the amount of salt (in g/m3) that should be applied to a pond, according to the expected nitrite levels…
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La sal común es una herramienta útil en la acuacultura, parte 2
https://www.globalseafood.org/advocate/la-sal-comun-es-una-herramienta-util-en-la-acuacultura-parte-2/?_rt=MTU3fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=6d2bf5f777…1. Boyd (1998) sugirió una ecuación simple para determinar la cantidad de sal (en g/m3) que se debe aplicar a un estanque, de acuerdo con los niveles de nitrito esperados…
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Pond aeration and aerators: Second thoughts
https://www.globalseafood.org/advocate/pond-aeration-and-aerators-second-thoughts/?_rt=MTU4fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=07b0fdab14…concentration in the surface water is 5 mg/L and that of the bottom water is 2 mg/L, the aeration efficiency (as calculated following Dr. Claude Boyd’s 1998 method for defining…
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Current production, challenges and the future of shrimp farming
https://www.globalseafood.org/advocate/current-production-challenges-and-the-future-of-shrimp-farming/?_rt=MTU5fDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=8f4f3f7a8d…area devoted to shrimp farming was recently estimated at around 2,135,110 hectares by Boyd and McNevin. The annual value of farmed shrimp in 2014 was estimated at $23.6 billion in…
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La producción actual, desafíos y el futuro del cultivo del camarón
https://www.globalseafood.org/advocate/la-produccion-actual-desafios-y-el-futuro-del-cultivo-del-camaron/?_rt=MTYwfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=5e1b7d25b8…al cultivo de camarón fue estimada recientemente en alrededor de 2,135,110 hectáreas por Boyd and McNevin. El valor anual del camarón de cultivo en 2014 se estimó en $ 23,600…
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Best management practices minimize impacts of aquaculture effluents
https://www.globalseafood.org/advocate/best-management-practices-minimize-impacts-of-aquaculture-effluents/?_rt=MTYxfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=461335c300…The effects of the organic matter are multiplied by resulting phytoplankton blooms that often increase organic matter by two to four times the original metabolic wastes. For example, Boyd (1985)…
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Improving the osmoregulatory capacity of Pacific white shrimp grown in low salinity
https://www.globalseafood.org/advocate/improving-the-osmoregulatory-capacity-of-pacific-white-shrimp-grown-in-low-salinity/?_rt=MTYyfDl8Ym95ZHwxNzY1MTA1Nzc3&_rt_nonce=411b50c1d4…salinity. Using the equation by Boyd and Thunjai (2003), we can estimate: SECx = (Sp) (Rx) where SECx is the equivalent concentration in seawater of the ion x; Sp is…