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Food & Resource Security
- Thread starter Maikeru
- Start date
The problem I see with farmed fish is of nutrition. [Farmed] fish are incapable of producing EPA/DHA (the most important types of Omega-3's). Fish meal doesn't contain these compounds. Rather, fish oil is extracted from wild-caught fish and fed to the farmed fish.. which begs the question: why not just consume the wild-caught fish directly?True, I'm simply looking at it from a cost perspective, fish meal is more applicable for higher end carnivorous fish (salmon, tuna) I'd imagine , since you can feed tilapias with pelletized feed crops which will be dirt cheap.
Infact, from a quick google that's exactly what they do:
Pond tilapia gets fed with pellets that are 50% manure, 37% bran and only 2% fishmeal.
Compare that against salmon feed which has upwards of 30% fishmeal/oil content.
EPA/DHA is primarily produced by marine algae, fed upon by crustaceans, preyed on by smaller fish and then bigger fish up the food chain.
Farmed tilapia has the worst EPA/DHA profile. The vast bulk of extract is fed to farmed salmon and trout.
Crop yields in China hit record highs despite extreme weather events. A good sign that efforts to use technology and modern farming practices to boost yields in working. There's still plenty of room for improvement too, with use GMO crops expected to massively ramp up over the next few years. Speaking of which
China has cultivated its second harvest of genetically modified giant rice in a mountainous region with poor soil, with greater results, and Beijing is hailing the achievement as progress in its efforts to bolster food security amid soaring global rice prices.
The high-yielding home-grown strain of rice, which grows about twice as tall as ordinary rice, was recently harvested at trial farms in southwest China’s Sanzhou county, Guizhou province, the state’s Xinhua reported on Thursday.
In the area famous for its karst landscapes and challenging soil conditions, the yield reached 12.6 tonnes per hectare (11,243 pounds per acre), according to a Xinhua interview with a local farmer who had volunteered to grow the experimental variety. It marked a 5 per cent increase from 12 tonnes per hectare last year.
The 12.6-tonne yield from this year’s giant-rice harvest in Guizhou was also nearly 1.8 times greater than the average Chinese rice yield in 2022, which stood at 7.1 tonnes per hectare, according to the National Bureau of Statistics.
This giant-rice variety was developed in 2017 by the Institute of Subtropical Agriculture at the Chinese Academy of Sciences. Its stalks can reach around two metres tall, and it is more resistant to pests and flooding, according to the institute.