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Which specie should be cultivated?
Fish dominate amongst the vertebrates and the most common are specie
of carp, salmon and catfish. Carp dominates amongst freshwater farms,
while salmon is cultivated in both salt and freshwater. Salmon is
cultivated mostly in temperate areas of the northern hemisphere, while
the catfish is common in the southern USA.
In brackish water, mostly in Japan, mullet and eel are
cultivated, while in tropical waters, milkfish (Fam: Chanidae) is
common. Furthermore, the cultivation of different flatfish is common
in amongst others, Great Britian. Other vertebrate specie that are
cultivated include frogs, turtles and crocodiles, but this type of
cultivation is on a small scale and as yet, of little significance.
Amongst the invertebrates, different specie of blue
mussel are cultivated, with Spain and the Netherlands as the leading
nations. Even oysters
and the south Asian giant shrimp are cultivated in large quantities.
Mainly in Japan, China and Korea, red algae of the Porphyra
family is cultivated. Other algae that is farm are the green algae
enteromrpha
intestinalis and sea-lettuce
and the brown algae Undaria pinnatifida and different specie
of kelp.
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