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It covers 11.4 million square kilometres (4.38 million sq mi), which is the second largest zone in the world, exceeding the land area of the United States. [5] According to the FAO, in 2005, the United States harvested 4,888,621 tonnes of fish from wild fisheries, and another 471,958 tonnes from aquaculture. This made the United States the ...
Countries by seafood consumption per capita; Rank Country Consumption in kg/person (2020) 1 Maldives: 87.30 2 Iceland: 84.30 3 Macau: 70.26 4 Kiribati: 69.22 5 Hong Kong: 65.79 6 Portugal: 59.36 7 Antigua and Barbuda: 57.12 8 South Korea: 54.66 9 Malaysia: 53.33 10 Seychelles: 52.89 11 Norway: 50.57 12 Federated States of Micronesia: 48.61 13 Japan
For trout, stocking rates of 30 to 50 kg/m 3 are normal at the end of a rearing cycle, while for marine species, such as sea bass and sea bream, the achievable load is lower, between 15 and 20 kg/m 3. The total volume required for a raceway is calculated by dividing the total amount of fish in kg by the desired stocking rate in kg per m 3. [17]
These higher protein-level requirements are a consequence of the higher feed efficiency of aquatic animals (higher feed conversion ratio [FCR], that is, kg of feed per kg of animal produced). Fish such as salmon have an FCR around 1.1 kg of feed per kg of salmon [11] whereas chickens are in the 2.5 kg of feed per kg of chicken range. Fish do ...
One proposed alternative to the use of wild-caught fish as feed for the salmon, is the use of soy-based products. This should be better for the local environment of the fish farm, but producing soy beans has a high environmental cost for the producing region. The fish omega-3 fatty acid content would be reduced compared to fish-fed salmon.
Breaking it down further into two primary categories—wild salmon and farmed salmon—wild-caught salmon has several advantages, but farmed salmon still offers an array of nutritional upsides.
On a dry-dry basis, 2–4 kg of wild-caught fish are needed to produce 1 kg of salmon. [23] The ratio may be reduced if non-fish sources are added. [20] Wild salmon require about 10 kg of forage fish to produce 1 kg of salmon, as part of the normal trophic level energy transfer. The difference between the two numbers is related to farmed salmon ...
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