on the status and purposes of ancient egyptian art
Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
Ngày tải lên :
15/12/2013, 00:15
... impact on the microbial populations in the associated culture medium and
eventually in the fish/shrimp’s gut flora, and consequently on the health status and the
digestive capability of the larva ... 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 ... based on a number of criteria (Fig.
1.5.). Most of the criteria as identified from the viewpoint of the larva have already been
discussed above with the exception of the criterion ‘purity’. One...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 2 doc
Ngày tải lên :
15/12/2013, 00:15
... 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 ...
rate and in this way the growth rate and not the cell density is kept constant.
Laing (1991) described the construction and operation of a 40 l continuous system
suitable for the culture of flagellates, ... regulation. To reduce risks, two series of stocks are often
retained, one which supplies the starter cultures for the production system and the other
which is only subjected to the handling...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
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...
generations of offspring before they eventually die. The reproduction activity of
Brachionus depends on the temperature of the environment as illustrated in Table 3.1.
The life cycle of Brachionus ... facilitates on one hand the possibilities for automatic
feeding but on the other hand requires the use of aeration and cold storage. The following
standard culture procedure has been developed and ... called the
lorica. The shape of the lorica and the profile of the spines and ornaments allow the
determination of the different species and morphotypes (see 3.4.). The rotifer’s body is
differentiated...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
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... determining the population growth rate, and the
rate of colonisation of new environments with limited nutrient resources. Consequently,
if environmental preferences and nutritional factors don’t interfere, ... 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, ... 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 variability. Therefore,...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 5 docx
Ngày tải lên :
15/12/2013, 00:15
...
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 ... mg.l
-1
. The optimal aeration rate is a 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 ... determined by the conditions and techniques applied for harvesting,
cleaning, drying and storing of the cyst material. The impact of most of these processes
can be related to effects of dehydration or...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 6 docx
Ngày tải lên :
15/12/2013, 00:15
... positively phototactic, their concentration can be improved by shading
the upper part of the hatching tank (use of cover) and focusing a light source on the
transparent conical part of the bottom. Nauplii ...
and may be satisfied through the consumption of seawater, the main concern regarding
the mineral composition of Artemia is whether they meet the requirements of fish or
crustacean larvae reared ... 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
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... result in
the best possible culture conditions and highest production capacities. Application of an
that takes profit of the specific aspects of ongrown Artemia: instead of adding the
enrichment ...
colonies fix on the exoskeleton, by preference on the thoracopods, and become only
visible from the instar V/VI-stage onwards. The brine shrimp suffer physically, as the
movements of their ...
4.5.1. 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...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
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15/12/2013, 00:15
... water
and is often limited to certain periods of the year. Management of these ponds is similar
to the management of the Artemia ponds in artisanal salt farms.
Intensive Artemia culture in ponds ... depend
on the type of ponds already in use. Locating the Artemia ponds lower than all other
ponds is good practice, as the water flow into the ponds is much higher than the outflow
(usually ponds ... leakage is one
of the most common problems in fish/shrimp farms and even in large salt works
construction of a small pilot unit at the selected site, prior to embarking on the
construction of large...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
Ngày tải lên :
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... frame of the plankton net may be fixed to
the pond gates. The amount of zooplankton collected depends on the zooplankton
concentration in the water flowing out of the reservoir and on the volume ... 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 ... along
distribution pipes to the place of consumption, the normal practise is to concentrate and
transport the harvested zooplankton in 50 l containers. Under these conditions the
survival of...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 10 pptx
Ngày tải lên :
15/12/2013, 00:15
... 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. 1àm). In a study on the food quality of freshwater phytoplankton for the
production of cladocerans,...
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Tài liệu MIT Joint Program on the Science and Policy of Global Change: Effects of Air Pollution Control on Climate pdf
Ngày tải lên :
17/02/2014, 22:20
... to
consider carefully the connections between the chemistry of the atmosphere and climate. These
connections are complex and their nonlinearity is exemplified by the fact that concentrations of
ozone ... Description and Validation of the MIT Version of the GISS 2D Model Sokolov & Stone June 1995
3. Responses of Primary Production and Carbon Storage to Changes in Climate and Atmospheric CO
2
Concentration ... gas). Consideration of these
effects, which may be very important, will require calculation in the EPPA model of the impacts
of NO
x
, CO, VOC and SO
x
emission reductions on the cost of using...
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Tài liệu Study on the Development and Marketing of Non-Market Forest Products and Services ppt
Ngày tải lên :
18/02/2014, 21:20
... person acting on its behalf can be held responsible for the use of
this document or of the information contained within.
Study on the Development and Marketing of Non-Market Forest Products and ... legal regulations, etc.)
ã analysis/evaluation:
o Outcomes in relation to the objectives of the innovation
o Role of the innovation in the overall economic strategy of the organisation (e.g.
specialisation, ... contract from the European Commission. It solely reflects the views
of the authors, and it should not be interpreted as a position of the European Commission. Neither
the European Commission,...
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