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Ebook Kỹ thuật nuôi tôm hùm lồng và các biện pháp phòng trị bệnh - ThS. Võ Văn Nha
Ebook Kỹ thuật nuôi tôm hùm lồng và các biện pháp phòng trị bệnh gồm 4 chương. Nội dung cuốn sách trình bày các kiến thức chung, vài nét về tình hình nuôi và một số yếu tố môi trường vùng phân bố tôm hùm, biện pháp phòng bệnh tổ hợp ở tôm hùm nuôi lồng, một số bệnh thường gặp ở tôm hùm nuôi lồng và biện pháp phòng trị.
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The Aral Sea Encyclopedia - References
Chronology of the Aral Sea Events from the 16th to the 21st Century Years 1558 General Events 16th century An English merchant and diplomat, Anthony Jenkinson, travels through Central Asia and observes the medieval desiccation of the Aral Sea. He writes that ‘‘the water that serveth all to country is drawn by ditches out of the river Oxus [old name for Amudarya] into the great destruction of the said river, for which it falleth not into the Caspian Sea as it gath done in times past, and in short time all land is like to be destroyed, and to become a wilderness...
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The Aral Sea Encyclopedia - A
The ‘‘Aral Sea Encyclopedia’’ is the first one in the new series of encyclopedias about the seas of the former Soviet Union. Preparing it we faced certain difficulties. The thing is that this encyclopedia is a monument to the sea that is disappearing during our lifetime.
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The Aral Sea Encyclopedia - B
B ‘‘Badai-Tigai,’’ nature reserve – located on the right bank of the Amudarya in the southwestern part of Karakalpakstan, 85 km south of the Takhiatash dam (see) and 130 km north of the Tuyamuyun dam. Its length is 17.5 km, and its width is 1.5 to 2 km. It was created in 1971 for conservation
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The Aral Sea Encyclopedia - C
C Caique – a big boat without a deck with a carrying capacity of 5–50 tons. When sailing against a current, C. uses a rope that is pulled from the shore. In the early 20th century, C. was widely used on the Amudarya. Cane (Phragmites australis) – before the Aral crisis (see),
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The Aral Sea Encyclopedia - D
D Dambal Island* – located near the eastern coast of the Aral, 15 km to the south of the Kokarev Cape, concealing Karatma Bay (see) to the west. A wide strait formed between Biiktau (see) and D. Islands leading to Karatma Bay. The island is low, in some places inundated with water.
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The Aral Sea Encyclopedia - E
E Eastern (Aral) Sea – the remaining part of A.S. located to the east of the merged chain of the Vozrozhdenia (see), Lazareva (see) and Komsomolsky (see) Islands is referred to in this way in scientific literature. Ecological-geographical database of the Aral Sea basin
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The Aral Sea Encyclopedia - F
F Farming (Historical) in the circum-Aral area – the initial demarcation of states in the region coincided, in many cases, with irrigation zones and irrigation systems, which appeared in the Aral basin in the first quarter of 1000 B.C. This period was preceded by the large-scale unification
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The Aral Sea Encyclopedia - G
G Geller Samuil Yulievich (Yevelievich) (1906–1972) – Soviet geographer who was one of the pioneer researchers studying the Karakum Desert. He graduated from the Geographical Department of Leningrad University, Doctor of Geography (1947).
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The Aral Sea Encyclopedia - H
H History of Aral Sea investigations – as V.V. Bartold (see) noted, the areas nearby the Aral ‘‘had been involved in historical life rather late.’’ First allusions to the A.S. existence were found with Greek authors. Strabo (64–63 B.C.–23–24 A.D.) pointed out that the territory to the east of the
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The Aral Sea Encyclopedia - I,J
I Ichthyofauna of the Aral Sea – ichthyofauna is made up of the Asian mountain, Ponto-Caspian, Turkenstan, and other fauna complexes. Up until the 1960s, I.A.S. comprised 20 fish species belonging to 7 families. The most abundant was the carp family
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The Aral Sea Encyclopedia - K
K Kaitpa – deep pits in the Amudarya riverbed that are erodeded as the water flows in the river meanders. Kamyslybas, Kamyslybasi Lake – the largest water body in the Kamyslybas lake system (see). Located in the Syrdarya valley, in the depression between bald mountains.
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The Aral Sea Encyclopedia - L,M,N
L Land reclamation and water management (formerly ‘‘Hydraulic Construction and Land Reclamation’’) – the monthly scientific-production journal of the USSR Ministry of Agriculture (later, the theoretical and scientific-practical journal of the USSR Ministries of Agriculture and of Water Management). It was founded in April 1949. Its first editor-in-chief was K.K. Shubladze, then after 1952 A.I. Shklyarevsky, then from 1971 Ye.A. Nesterov. The journal highlighted the problems of land reclamation and water management in the Central Asian countries. Some issues were devoted to the Aral problems (No. 1, 2002). Large (Aral) Sea* – this is the name of the part of A.S....
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The Aral Sea Encyclopedia - O,P
O Obodina – a small bay not far into the mainland in the Aral and Caspian Seas. Obrucheva Island, bank* – located to the west of the Akpetkinsky Archipelago, 15 km to the southwest of Tolmacheva Island (see). The depths around the bank were 5–10 m.
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The Aral Sea Encyclopedia - R
R Rand coast, coast of the Rand type – characterized by wide (from 1 to several kilometers) recently dried areas. In the lower part closer to the sea, the surface was densely covered by salt-loving plants (halophytes). With the dropping of the groundwater table, the vegetation cover dried
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The Aral Sea Encyclopedia - S
S Saberfish* (P. Culturatus (L.)) – anadromous, schooling fish of the carp family (Cyprinidae). Its body length is up to 50 cm, and its weight is up to 500–600 g. Lives mostly in the lower reaches of rivers and reservoirs. Propagates at the age of 3–4 years.
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The Aral Sea Encyclopedia - T
T Taijegen Island* – located in the eastern part of A.S., 15 km to the south–east of Kuzjatepes Island. The island is low, with a flat coast surrounded by the reed thickets. Fishery activities were practiced in its northern part. Tailakjegen Islands*
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The Aral Sea Encyclopedia - U,V
U Ulken-Karatyup Bay* – secondary bay in the eastern part of Sarychaganak Bay (see). It projected insignificantly eastward from the shore. The shores of the cape were high and abrupt. Ulkentumsyk Cape* – projected insignificantly eastward from the shore.
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The Aral Sea Encyclopedia - W,Y,Z
W Water balance of the Aral Sea – the water balance of the sea depends on the correlation between the inflow of river and groundwaters, atmospheric precipitation, and water losses to evaporation. The structure of the A.S. water balance is a function of various levels of economic development. From 1930 through 1990, the available water resources in the basin were estimated at 115 cu. km annually. Natural water losses in 1930 were 36 cu. km, in 1960 – 13 cu. km, and in 1990 – 7 cu. km. Water consumption in 1930 was 25 cu. km, in 1960 – 48 cu....
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Small-scale freshwater fish farming - Chapter 1,2
Agrodok 15 Small-scale freshwater fish farming This Agrodok aims at providing basic information on how to set up a small-scale fish farm for subsistence purposes. As fish farming practices are very diverse, we have chosen to limit ourselves
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Small-scale freshwater fish farming - Chapter 3,4
3.1 Fish farming ponds Different pond types Depending on the site, there are two different types of fish ponds to choose from: diversion or barrage ponds.Diversion ponds Diversion ponds (figure 3) are constructed by bringing water from another source to the pond.
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Small-scale freshwater fish farming - Chapter 5,6
Part II: Planning a fish farm Figure 24: Setting up a fish farm Land, water and climatic conditions are probably the most important natural factors that need to be assessed. When developing a site for fish farming you should consider the effect it may have on the environment. Important natural areas
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Small-scale freshwater fish farming - Chapter 7,8
7 Selecting the fish species When selecting fish species suitable for farming, various important biological and economic factors need to be considered: 1 market price and demand (not when fish are produced for own consumption) 2 growth rate 3 ability to reproduce in captivity 4 simple culture of the young fish 5 match
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Small-scale freshwater fish farming - Chapter 9
9.1 Harvesting and post-harvesting Harvesting the fish As in any other type of farming, the final phase in the fish farming cycle is the harvest and possible sale of the fish. When most of the fish are big enough to be eaten or sold, harvesting can start (usually after 5 to 6 months).
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Agriculture for Beginners - Chapter 1
Agriculture for Beginners, by Charles William Burkett and Frank Lincoln Stevens and Daniel Harvey Hill This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook
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Agriculture for Beginners - Chapter 2
CHAPTER II THE SOIL AND THE PLANT SECTION VIII. ROOTS [Illustration: FIG. 16. ROOT-HAIRS ON A RADISH] You have perhaps observed the regularity of arrangement in the twigs and branches of trees. Now pull up the roots of a plant, as, for example, sheep sorrel, Jimson weed
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Agriculture for Beginners - Chapter 3
CHAPTER III THE PLANT SECTION XII. HOW A PLANT FEEDS FROM THE AIR If you partly burn a match you will see that it becomes black. This black substance into which the match changes is called carbon. Examine a fresh stick of charcoal, which is, as you no doubt know, burnt wood.
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Agriculture for Beginners - Chapter 4
CHAPTER IV HOW TO RAISE A FRUIT TREE Let each pupil grow an apple tree this year and attempt to make it the best in his neighborhood. In your attempt suppose you try the following plan. In the fall take the seed of an apple--a crab-apple is good--and keep it in a cool place during the winter.
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Agriculture for Beginners - Chapter 5
CHAPTER V HORTICULTURE SECTION XXV. MARKET-GARDENING The word horticulture is one of those broad words under which much is grouped. It includes the cultivation of orchard fruits, such as apples and plums; of small fruits, such as strawberries and raspberries
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Agriculture for Beginners - Chapter 6
CHAPTER VI THE DISEASES OF PLANTS SECTION XXVII. THE CAUSE AND NATURE OF PLANT DISEASE Plants have diseases just as animals do; not the same diseases, to be sure, but just as serious for the plant. Some of them are so dangerous that they kill the plant
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