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"734t" - 1 õppematerjal

Inglise keele essee
2
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Inglise keele essee

There is no comprehensive global database on fish stocks and FAO has initiated a global inventory of fish stocks with their main characteristics. Their monitoring and the assessment of their state within an ecosystem perspective need significant improvement. During Soviet period (1944-1991) fish farming developed rapidly since the end of 60- s and reached its peak in 1990 with 1743 tons of fish for consumption, which consisted mainly of common carp (917 t) and large rainbow trout (734t). Estonia is a northern country where the vegetation period is short (3-4 months) and thus the water temperature is a limiting factor of fish farming. Therefore the heated effluent waters of the electric power plants were successfully used to prolong the growth period. Collapse of the socialist system caused decline in fish farming production, mainly because of cease of fish rearing in heated waters of electric power stations. During postsocialist period all the remaining fish farms have been

Keeled → Inglise keel
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