Temperature and water-borne ecosystems
There's
been some interesting news in the week regarding water temperature and
water-borne ecosystems, specifically fish, and the fishing industry, so
i've lumped them together into a special post.
Most farmed fish, if you didn't
already know, are carnivorous, and so are fed flakes of other fish (carnivorous fish tend to be bigger than herbivorous fish).
“Studies have shown that fish, such as salmon and sea bass, eat less of
the plant protein product and don’t grow as fast. Their flesh does not
receive the necessary levels of Omega-3 fatty acids, which are a key
component of human nutrition. The food also contains anti-nutrients
that cause difficulties with digestion and absorption of nutrients, as
well as toxins that can build up in the fish.”
This
doesn't seem a tenable practice, so fermented plant feed is being
pioneered.
“Fermentation methods could predigest the toxins and anti-nutrients in plant protein
food, making it easier for the fish to absorb and maintain overall good
health. It will help resolve current technical limitations of the
product and address the concerns about overfishing and food shortage in the years to come.”
Farm salmon are fed on wild salmon, but outcompete them, and give them
parasites (farming conditions favour pathogen populations), aswell as
suffering from water temperature increases. On top of that, increased
homogeneity's risking the fishes' health
http://phys.org/news/2012-05-hatchery-fish.html
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