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. 1µm). 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...

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

... 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 major ... Magda Vanhooren and March Verschraeghen for their assistance with the layout of the manual. Lavens, P; Sorgeloos, P. (eds.) Manual on the production and use of live food for aquaculture FAO ... permission of the copyright owner. Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Information Division, Food...

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 - - ... speciation, reproductive mode and potential for exploitation. In: Book of abstracts of contributions presented at the International Conference “Improvement of the commercial production of marine aquaculture ... 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. Annually, over 2000 metric tons of...

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. ... 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. ... evaluation of dry food is the consistency of the food quality and supply, and the possibility for storage without loss of quality. It follows therefore that bulk products must be stored in a dry and...

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 ... 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 ... acidity of the bottom. The use of organic fertilizers increases the risk of infections. This risk can be reduced by composting the manure before use. One of the main disadvantages of organic...

Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx

... 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 are also major drawbacks in the use of ... 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 ... prevailing conditions. This method can be used effectively only in the case where the flow rate of the water at the outlet of the pond is at least 5 to 10 l.s -1 . Optimum conditions for this...

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 .10 5 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 ... 0.4 1 0-1 5 5-1 50 10 2 -1 05 Speirs Levy 4 .10 3 0.2 1 0-2 0 5-7 5 10 4 -1 07 Through micro-encapsulation techniques dietary ingredients can be encapsulated within digestible capsules and delivered...

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 - 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 ... 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. ... 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...

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

... by disinfection of the cysts prior to hatching incubation and/ or by the addition of a few drops of a non-toxic antifoaming agent (e.g. silicone antifoam). The temperature of the seawater is ... 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...

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. ... enhanced the survival of P. monodon PL-15 and the osmotic resistance of PL -1 0. This has recently been confirmed with the production characteristics of P. monodon PL -1 0 and PL-20 being significantly ... 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 )...

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