Albumin
发表于 2025-3-28 18:28:44
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乐器演奏者
发表于 2025-3-28 20:21:25
United Kingdom,Total production was about 4400 MT in 1980 and 5200 MT in 1981 (Anon. 1981). Regrettably, however, the majority of the production is concentrated on one species, viz., rainbow trout. Nevertheless, the interest in farmed fish, actively encouraged by the media, is now extending the commercial horizons
superfluous
发表于 2025-3-29 02:04:09
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新星
发表于 2025-3-29 03:52:02
Poland,lakes, 104,000 ha (251,000 acres) by rivers and dam reservoirs, and 60,000 ha (145,000 acres) by ponds. The most important users of these waters are State Fish Farms and the Polish Anglers Association. State Fish Farms use over 91% of total lake area and 86% of total pond area. The Polish Anglers As
表否定
发表于 2025-3-29 08:26:27
Czechoslovakia,d Moravia. The greatest development was in the 16th century when complex fish farms were built in Bohemia and Moravia and water surface area was estimated to be more than 120,000 ha (296,400 acres). During the 18th and 19th centuries, cultivation became more intensive, resulting in a reduction of wa
教义
发表于 2025-3-29 14:21:48
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Sedative
发表于 2025-3-29 16:51:21
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Original
发表于 2025-3-29 23:45:25
Czechoslovakia,ter area by 50% with converted ponds being used for pastures and crops. After this time, pond area gradually declined so that by 1933 there were only about 42,000 ha (103,820 acres) in Bohemia and 5915 ha (14,610 acres) in Moravia. Following this period came the first state fish farms.
季雨
发表于 2025-3-30 02:41:30
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Anonymous
发表于 2025-3-30 04:16:05
Switzerland, with 15%, and with minor quantities from France. Total supply, including domestic production and imports, was an estimated 1332 MT (1468 ST). Domestic production accounted for only 23% of total supply, with imports accounting for the bulk of total supply.