creation collection processing distribution and use of information

Ngày tải lên: 28/03/2014, 19:20

Ngày tải lên: 20/06/2014, 21:20

... Harvesting/concentration and cold storage of rotifers 3.7. Production and use of resting eggs 3.8. Literature of interest 3.9 Worksheets Worksheet 3.1. Preparation of an indicator solution for determination of ... Literature of interest 6. CLADOCERANS, NEMATODES AND TROCHOPHORA LARVAE 6.1. Daphnia and Moina 6.1.1. Biology and life cycle of Daphnia 6.1.2. Nutritional value of Daphnia 6.1.3. Feeding and nutrition ... groups of live food organisms used in aquaculture, namely micro-algae, rotifers, Artemia, natural zooplankton, and copepods, nematodes and trochophores. Distribution: Directors of Fisheries and...

Ngày tải lên: 15/12/2013, 00:15

... culture collections. A list of culture collections is provided by Vonshak (1986) and Smith et al. (1993a). Alternatively, the isolation of endemic strains could be considered because of their ... advantage of allowing control of the quality of the cultures. The major difficulty in microscopic counts is reproducibility, which is a function of the sampling, diluting, and filling of the counting ... application in the rearing of rotifers and some species of penaeid shrimp. However, a limited nutritional value of yeasts was reported for various species of filter-feeders and attributed to their...

Ngày tải lên: 15/12/2013, 00:15

... accumulations of wasted food by assuring short retention times of the food particles. This is achieved by using high starting densities of 200 rotifer/ml -1 and the distribution of small amounts of feed ... requires the use of aeration and cold storage. The following standard culture procedure has been developed and tested on several rotifer strains in 100 l tanks. Cylindro-conical tanks of 100 l ... 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 dry Artemia...

Ngày tải lên: 15/12/2013, 00:15

... delivery of vitamins, chemotherapeutics and vaccines. Furthermore, a better knowledge of the biology of Artemia was at the origin of the development of other Artemia products, such as disinfected and ... screening of candidate strains and of eventual local populations, as well as the study of prevailing environmental conditions. Uncontrolled introduction of Artemia may thus lead to a decrease of natural ... optimal use of Artemia in aquaculture the hatching characteristics of any batch of cysts being used should be known. More information in this respect is given in chapter 4.2.5.2. GROWTH RATE OF...

Ngày tải lên: 15/12/2013, 00:15

... 4.2.4. Direct use of decapsulated cysts The direct use of Artemia cysts, in its decapsulated form, is much more limited in larviculture of fish and shrimp, compared to the use of Artemia nauplii. ... 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 composition (in % of dry matter) of decapsulated Artemia cysts and ... function of the tank size and the density of cysts incubated. Excessive foaming can be reduced by disinfection of the cysts prior to hatching incubation and/ or by the addition of a few drops of a...

Ngày tải lên: 15/12/2013, 00:15

... larvae and nauplii length of Artemia from seven geographical sources offered as food to fish larvae (modified from Beck and Bengtson, 1982). 4.3.6.3. Marine fish The larvae of many species of ... fast harvesting of large volumes of Artemia nauplii and allows complete removal of debris from the hatching medium. This technique results in a significant reduction of labour and production ... Artemia is generally used for feeding the late larval and postlarval stages of penaeids. Freshly-hatched nauplii are usually offered at the start of the first mysis stage, and sometimes even...

Ngày tải lên: 15/12/2013, 00:15

... Engineering 11: 107-119. Dhont J., Lavens, P. and Sorgeloos, P. 1993. Preparation and use of Artemia as food for shrimp and prawn larvae. In: CRC Handbook of Mariculture. 2nd Edition. Vol 1: Crustacean ... removal of the complex and thick yeast cell wall by enzymatic treatment and/ or supplementation of the diet with live algae significantly improved assimilation rate and growth rate of the brine ... advantages of these products are their low cost and universal global availability. Equally important in the evaluation of dry food is the consistency of the food quality and supply, and the possibility...

Ngày tải lên: 15/12/2013, 00:15

... 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 ... advantages and disadvantages of organic fertilizers. The organic fertilizers most often used in aquaculture are chicken, quail and duck manure. Cow, pig and goat dung have also been used but ... hatching rate of Artemia cysts (after Vanhaecke and Sorgeloos, 1882). 4.5.8. Literature of interest Bosteels, T., Tackaert, W., Van Stappen, G. and Sorgeloos, P. 1996. Improved use of the fluidized...

Ngày tải lên: 15/12/2013, 00:15

... value of Daphnia 6.1.3. Feeding and nutrition of Daphnia 6.1.4. Mass culture of Daphnia 6.1.5. Production and use of resting eggs 6.1.6. Use of Moina 6.1.1. Biology and life cycle of Daphnia ... and 3.4%, respectively). Specific levels of EPA and DHA are respectively 6% and 17% in adults fed Dunaliella, and 18% and 32% in adults fed Rhodomonas. In nauplii the levels of EPA, DHA and ... 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 rather than anything else. The effectiveness of...

Ngày tải lên: 15/12/2013, 00:15

... Daphnia and Moina 6.1.1. Biology and life cycle of Daphnia 6.1.2. Nutritional value of Daphnia 6.1.3. Feeding and nutrition of Daphnia 6.1.4. Mass culture of Daphnia 6.1.5. Production and use ... Skeletonema costatum and Thalassiosira pseudonana) are continuously added to the seawater by means of a peristaltic pump. In the case of clams a substrate of sand and/ or gravel can be used, but this ... 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 major...

Ngày tải lên: 15/12/2013, 00:15

... ___________________ Step 5 Put the tip of the red, positive lead on the positive side of a battery. Put the tip of the black, negative, lead on the other end of a battery. a. Is any number showing ... probe should go in the COM jack and the red probe should go in the + (plus) jack. Step 2 Turn on the multimeter. Click or turn to the on button. a. What is the model of multimeter? __________________________________________________________________________ ... Because it is possible to check high voltages, extra care should be taken to avoid electrical shock. Step 1 Insert the red and black leads into the proper jacks...

Ngày tải lên: 21/12/2013, 19:15

... ___________________ Step 5 Put the tip of the red, positive lead on the positive side of a battery. Put the tip of the black, negative, lead on the other end of a battery. a. Is any number showing ... probe should go in the COM jack and the red probe should go in the + (plus) jack. Step 2 Turn on the multimeter. Click or turn to the on button. a. What is the model of multimeter? __________________________________________________________________________ ... Because it is possible to check high voltages, extra care should be taken to avoid electrical shock. Step 1 Insert the red and black leads into the proper jacks...

Ngày tải lên: 18/01/2014, 04:20

... and fungi, roots and tubers, pulses and legumes, and aloe vera), seaweeds, and nuts and seeds04.2.2.3 Vegetables (including mushrooms and fungi, roots and tubers, pulses and legumes, and ... legumes, and aloe vera), and seaweeds04.2.2.5 Vegetable, (including mushrooms and fungi, roots and tubers, pulses and legumes, and aloe vera), seaweed, and nut and seed purees and spreads ... (including mushrooms and fungi, roots and tubers, pulses and legumes, and aloe vera), seaweed, and nut and seed pulps and preparations (e.g., vegetable desserts and sauces, candied vegetables)...

Ngày tải lên: 14/02/2014, 03:20

Ngày tải lên: 18/02/2014, 04:20

Ngày tải lên: 18/02/2014, 07:20

Ngày tải lên: 19/02/2014, 09:20