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Titlebook: World Fish Farming: Cultivation and Economics; E. Evan Brown Book 1983 The AVI Publishing Company, Inc. 1983 Asia.China.Fish farming.Hunga

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樓主: 遮陽傘
31#
發(fā)表于 2025-3-26 22:11:34 | 只看該作者
32#
發(fā)表于 2025-3-27 03:28:57 | 只看該作者
Introduction,primitive fish farming from the Etruscans, who in turn learned them from the Phoenicians. Any exact date of development would be pure conjecture. However, in the Mediterranean area, fish farming dates back several thousand years. Egyptian bas-reliefs have scenes depicting fish raised in ponds.
33#
發(fā)表于 2025-3-27 09:20:11 | 只看該作者
34#
發(fā)表于 2025-3-27 10:37:36 | 只看該作者
Canada,establishment of the Newcastle Hatchery in Ontario by the Canadian government in 1866, a system of salmonoid production was established which strongly influenced both private and government aquacultural developments in Canada, if not North America, over the century which followed. Similarly, the con
35#
發(fā)表于 2025-3-27 15:23:55 | 只看該作者
Norway,e or less out of production. The remaining 50 were culturing Atlantic salmon (see Fig. 3.1). These were the only two cultured fish species grown in Norway. Hence, this chapter is divided into two subparts: one for Atlantic salmon and one for rainbow trout. Most of the cultured fish industry is conce
36#
發(fā)表于 2025-3-27 20:50:19 | 只看該作者
Denmark,as also cultured. The first Danish trout farms were established about 1890 in Jutland, the western portion of Denmark which is attached to the European continent (Bregnballe 1963). In the beginning brown trout was the dominant species cultured. Within a short period of time, however, rainbow trout w
37#
發(fā)表于 2025-3-27 22:08:04 | 只看該作者
38#
發(fā)表于 2025-3-28 04:24:59 | 只看該作者
Italy,on was related to the common belief that since natural trout live in mountain brooks, trout farms should be built in the mountains. These early trout farmers erroneously believed that altitude was an important factor. They did not know that the limiting factor was high quantity of water with constan
39#
發(fā)表于 2025-3-28 06:44:17 | 只看該作者
40#
發(fā)表于 2025-3-28 11:57:05 | 只看該作者
Spain, were 112 private fish farmers producing between 5000 and 6000 MT (5510 and 6612 ST) of rainbow trout. By 1979 production had reached 9000 MT (9900 ST). The total volume of rainbow trout eggs produced for all purposes was 100 million compared with 3 million Atlantic salmon . and 6 million brown trou
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