Food for thoughts
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
... also the production and use of live food organisms as feed for the developing larvae. The present manual describes the major production techniques currently employed for the cultivation of the ... organisms as feed for the developing larvae. The aim of the present manual was therefore to review and summarise the latest developments concerning the production and use of the major live food organisms ... procedure for pond culture 6 .1. 4.5. Contamination 6 .1. 5. Production and use of resting eggs 6 .1. 6. Use of Moina 6.2. Nematodes 6.3. Trochophora larvae 6.3 .1. Introduction 6.3.2. Production of...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc
... reduce the need for on- site algal production, including the use of preserved algae, micro-encapsulated diets, and yeast-based feeds. To date, the requirement for live algae in the mass -production ... influenced by food ration and the optimal ration for maximum growth depends upon the species and culture conditions of the algae making up the diet, and the bivalve culture conditions. Under practical ... Neaubouer 2. 104 0.1 2 0-4 0 (phase) 2- 3 0 104 -1 07 Petroff Houser 2. 105 0. 02 4 0-1 00 0. 5-5 104 -1 08 Cellular volume is measured by centrifuging samples and measuring the volume of the concentrated...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
... 250 - 30 0 0 .37 92 - 110 30 0 - 35 0 0 .33 100 - 117 35 0 - 400 0 .30 105 - 120 400 - 450 0.27 107 - 120 450 - 500 0. 23 105 - 117 > 500 0.25 125 > 1200 0.20 240 Furthermore, all efforts ... plicatilis. 3. 5 .3. Culture procedures 3. 5 .3. 1. Stock culture of rotifers 3. 5 .3. 2. Upscaling of stock cultures to starter cultures 3. 5 .3. 3. Mass production on algae 3. 5 .3. 4. Mass production on algae ... stable and less exposed to fast decrease by starvation. 3. 7. Production and use of resting eggs For the mass rearing of rotifers as larval food the amictic way of reproduction (see 3. 3.)...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
... Vadala - - Bhayander P A. par India Bombay Bahinder - - Kelambakkam - - India Madras Vedaranyam - - Veppalodai - - Pattanamaruthur - - Spic Nagar - - Thirespuram - - Karsewar Island - - ... specific and remain relatively constant, (i.e. they have become genotypical as a result of long-term adaptations of the strain to the local conditions; see chapter 4. 1.2 .4) . 4. 1.2 .4. Strain-specific ... North America and seemed to be unlimited. However, with the expansion of aquaculture production in the 1970’s, the demand for Artemia cysts soon exceeded the offer and prices rose exponentially,...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
... criterion is related to the total amount of food available for the predator per gram of cyst product (cf. calculation of food conversion). Table 4.2 .5. Effect of incubation at low salinity on hatching ... over 80% of their cellular water, and upon interruption of the aeration, the now coffee-bean shaped decapsulated cysts settle out. After harvesting of these cysts on a mesh screen they should ... during the first two weeks, the use of decapsulated cysts constitutes a saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii. Table 4.2.4. The proximate...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
... 8-1 1 1 12 2.5 1 3-1 6 2. 7-3 .0 1 7-1 9 5. 0-7 .0 2-5 2 0-2 3 3. 0-4 .3 3-1 1 5-7 2 4-2 7 0 1 4-1 7 7-1 0 2 8-2 9 1 7-2 0 1 0-1 5 the breakdown of the Artemia nauplii in the digestive tract of the predator larvae. ... analysed for the content of various vitamins and were found to contain high levels of thiamin ( 7-1 3 µg.g -1 ), niacin (6 8-1 08 µg.g -1 ), riboflavin (1 5-2 3 µg.g -1 ), pantothenic acid (5 6- 7 2 µg.g -1 ) ... enhanced the survival of P. monodon PL-15 and the osmotic resistance of PL-10. This has recently been confirmed with the production characteristics of P. monodon PL-10 and PL-20 being significantly...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
... seawater formulations used for tank production of Artemia (ing.l -1 ). For the Dietrich and Kalle formulation, solutions A and B are prepared separately, then mixed and strongly aerated for 24h. ... 14.5 0 .75 10 95 73 72 1.8 2.9 3.5 11.6 0. 67 13 61 32 28 - - - 8.0 1.13 15 55 41 34 2.0 2.9 3.8 10.0 1. 17 18 58 37 29 - - - 5.8 1.34 40 74 12 - 1.5 2.3 - - - Figure 4.4.14. Survival and growth ... highest daily food ration at a maximum concentration of 200 g food. l -1 . Even at these concentrations, the food suspension is so thick that the risk for clogging of the food lines is quite high....
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
... Salt production is abandoned during the rainy season, when evaporation ponds are often turned into fish/shrimp ponds. for dilution due to release of water from the cysts. - for a low ratio of ... predators from entering the culture ponds. The same type of filters as described for large salt operations can be used. Moreover, the small size of the ponds allows the use of so-called filter boxes. ... bottom, they should only be used for a limited period of time. Recommended levels of organic manure are 0.5 to 1.25 ton.ha -1 at the start of the production season with dressings of 100 to...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
... However, one should be aware that the greater the surface area of the net the more effective and rapid the filtration. Hence, the upper limit of the dimensions of the nets depends on the ease of handling ... facility, there might be a low cost involved in the harvest of this live food compared to the infrastructure and production costs of the live food items discussed earlier. On the other hand, there ... in the water leaving the reservoir can be concentrated. In the case of ponds, the frame of the plankton net may be fixed to the pond gates. The amount of zooplankton collected depends on the...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
... particles from the water. The efficiency of the filter allows even the uptake of bacteria (approx. 1àm). In a study on the food quality of freshwater phytoplankton for the production of cladocerans, ... COVER The success of any farming operation for fish and shellfish depends upon the availability of a ready supply of larvae or “seed” for on- growing to market size. The cultivation of fish and ... under controlled hatchery conditions requires not only the development of specific culture techniques, but in most cases also the production and use of live food organisms as feed for the developing...
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Report: "rotifer food for aquatic animals" potx
... effects on other rotifer strainsRotifers tended to be smaller at higher salinities and temperature for all strains 95. The dietary effects on lorica sizeOther 6 diets were usedSpecial culture ... were removed to repeat the procedureAfter another 3 days of exponential growth, preserved for measuring or initiate other experiment200 females 200 ml of IOM + SF SE 133. ... a wide range: Samples collected from serveral different locations by Ahlstrom The range for laboratory-cultivated is smaller than samples collected from nature 4 24 23 193. The...
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Báo cáo y học: "Fishy Food for Thought" potx
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Food for thoughts
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