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,...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx

... Enrichment of ongrown Artemia 4. 4.2.8. Control of infections 4. 4.2.9. Harvesting and processing techniques 4. 4.2.10. Production figures and production costs 4. 4.3. Literature of interest 4. 4 .4. ... Worksheet 4. 3.1.: Standard enrichment for Great Salt Lake Artemia. 4. 4. Tank production and use of ongrown Artemia 4. 4.1. Nutritional properties of ongrown Artemia 4. 4.2. Tank production 4. 4.2.1. ... Advantages of tank production and tank produced biomass 4. 4.2.2. Physico-chemical conditions 4. 4.2.3. Artemia 4. 4.2 .4. Feeding 4. 4.2.5. Infrastructure 4. 4.2.6. Culture techniques 4. 4.2.7....

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx

... live foods. 4. 4.2. Tank production 4. 4.2.1. Advantages of tank production and tank produced biomass 4. 4.2.2. Physico-chemical conditions 4. 4.2.3. Artemia 4. 4.2 .4. Feeding 4. 4.2.5. Infrastructure ... 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. ... Infrastructure 4. 4.2.6. Culture techniques 4. 4.2.7. Enrichment of ongrown Artemia 4. 4.2.8. Control of infections 4. 4.2.9. Harvesting and processing techniques 4. 4.2.10. Production figures and production...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx

... Description of the different Artemia habitats 4. 5.2. Site selection 4. 5.3. Pond adaptation 4. 5 .4. Pond preparation 4. 5.5. Artemia inoculation 4. 5.6. Monitoring and managing the culture system 4. 5.7. ... salt production and inexpensive source of food for vertically integrated aquaculture. 13 3-1 41 . Proc. International Meeting on “Saltworks Conversion for Aquaculture , Trapani, Italy, May 9-1 1, ... 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...

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...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx

... also the production and use of live food organisms as feed for the developing larvae. The present manual reviews and summarizes the latest developments concerning the production and use of the ... resulting in anoxic conditions and consequently in high mortalities and/ or ephippial production. 6.1 .4. 3. Autotrophic system Autotrophic systems on the other hand use the addition of cultured algae. ... particles from the water. The efficiency of the filter allows even the uptake of bacteria (approx. 1µm). In a study on the food quality of freshwater phytoplankton for the production of cladocerans,...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc

... 2.10 4 0.1 2 0 -4 0 (phase) 2-3 0 10 4 -1 07 Petroff Houser 2.105 0.02 4 0-1 00 0. 5-5 10 4 -1 08 Cellular volume is measured by centrifuging samples and measuring the volume of the concentrated ... growth depends upon the species and culture conditions of the algae making up the diet, and the bivalve culture conditions. Under practical hatchery conditions, high food rations are often fed, which ... between the culture medium and the air. The latter is of primary importance as the air contains the carbon source for photosynthesis in the form of carbon dioxide. For very dense cultures, the...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt

... 250 - 300 0.37 92 - 110 300 - 350 0.33 100 - 117 350 - 40 0 0.30 105 - 120 40 0 - 45 0 0.27 107 - 120 45 0 - 500 0.23 105 - 117 > 500 0.25 125 > 1200 0.20 240 Furthermore, all efforts ... University of Gent, Belgium 4. 1.1. Introduction Among the live diets used in the larviculture of fish and shellfish, nauplii of the brine shrimp Artemia constitute the most widely used food item. ... population containing 50 to 150 rotifers.ml -1 . 3.5.3 .4. Mass production on algae and yeast Depending on the strategy and the quality of the algal blooms baker’s yeast may be supplemented. The...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx

... 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 ... of Gent, Belgium 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 ... 4. 2 .4. ). In addition, their individual dry weight and energy content is on the average 30 to 40 % higher than for instar I nauplii (see 4. 2.3.; Fig. 4. 3 .4. ). For example, for the culture of carp larvae...

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. ... harvest and start enrichment 18:00 add second enrichment · Day 4 - 9:30 harvest 4. 4. Tank production and use of ongrown Artemia 4. 4.1. Nutritional properties of ongrown Artemia 4. 4.2. ... freshly-hatched Artemia nauplii develop into the second larval stage within a matter of hours. It is 3 0-3 4 20 1 0-1 5 1 0-1 5 3 5-3 7 20 0 2 0-3 0 3 8 -4 1 0.05 20 3 0 -4 0 Start of weaning 2 0-1 5 4 0-5 0...

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