epa dha ratios on the growth and survival of galaxias maculatus jenyns 1842 larvae reared under different salinity regimes
effects of different stocking densities and diets on the growth and survival rate of black apple snail (pila polita)
Ngày tải lên :
22/09/2015, 15:34
... RECOMMENDATIONS .35 5.1 Conclusions .35 Effects of stocking density on the growth and survival rate of Pila polita 35 Effects of different diets on the growth and survival rate of ... evaluate the effect of different stocking densities on the growth and survival rate of Black apple snails Experiment 2: evaluate the effect of different diets on the growth and survival rate of Black ... (p
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Báo cáo khoa học: " Effect of ultraviolet radiation on the hatchability and survival of eggs and larvae of sheep nematode" doc
Ngày tải lên :
07/08/2014, 17:22
... Effect of ultraviolet radiation on the hatchability and survival of eggs and larvae of sheep nematode 61 Table The survival rate of ultraviolet radiated nematode larvae Time of observation (days) ... An additional 2% of the eggs in the control batch hatched following a further 1-day incubation As the number of eggs that hatched increased with the duration of hatching, the proportion of hatched ... activity and survival of the larvae The findings are presented in Table While only 20% of the 60 minutes irradiated larvae survived for days, the control experiment showed that 100% of the larvae were...
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RESEARCH ON THE GROWTH AND DEVELOPMENT OF TARO VARIETIES AND CULTIVATION TECHNIQUES FOR THE POTENTIAL VARIETY IN YEN BAI PROVINCE
Ngày tải lên :
06/10/2014, 11:46
... 30.7 tons / Economic one was 18.8 tons / The regression equation showing the relationship between yield of KMYB1 with the level of manure on farmland was the corresponding parabolic function: Y ... CT 1: tonnes manure (Control); CT 2: tons of manure; CT 3: 10 tons of manure; CT 4: 15 tons of manure; CT 5: 20 tons of manure; CT 6: 25 tons of manure - Norms and methods of monitoring: Monitoring ... KMYB on types of soil On a single-crop farmland, the density, season and the interaction between density and season affected the productivity of the KMYB 1, the most suitable plant density of 3.3...
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effects of magnesiumphosphoruspotassium containing in water on molting, growth and survival rate of the white shrimp (litopenaeus vannamei) juveniles, reared in low salinity water
Ngày tải lên :
22/09/2015, 12:38
... or discrepancies between the ion concentrations within their bodies and the aquatic environments they inhabit The degree of the osmoregulatory response is largely salinity dependent, the actual ... until the next molting cycle Duration of the molting cycle depends on the species and age of the shrimp Molting frequency on white shrimp decreased along with increasing the size of shrimp The ... evaluate the effects of several aqueous magnesium, potassium, and phosphorus on survival, growth, and molting interval of L.vannamei at salinity 2‰ The study consisted of two experiments The study consisted...
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Dissertation for doctor of philosophy in agriculture study on the growth and development ability of some imported soybean varieties and cultivation techniques for prospect variety in thai nguyen
Ngày tải lên :
14/07/2014, 13:23
... than the local varieties 23 CONCLUSION AND DISCUSSION Conclusion The favorable factors for developing the soybean production in Thai Nguyen were the favorable climate conditions and the large land ... AND DISCUSSION 3.1 Nature condition and status of soybean production in Thai Nguyen 3.1.1 Climate condition of Thai Nguyen Province Based on the ecology requirements of soybean and analyzed the ... increase of EY and AY of the testing soybean varieties The EY ranged from 2.42 - 3.87 tons/ha The AY ranged from 2.08 - 3.05 tons/ha where treatment had the EY at 3.87 tons/ha and the AY at 3.05 tons/ha,...
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Báo cáo lâm nghiệp: " Effects of ectomycorrhizal inoculation and the type of substrate on mycorrhization, growth and nutrition of containerised Pinus pinea L. seedlings produced in a commercial nursery" docx
Ngày tải lên :
08/08/2014, 00:22
... enhancing the photosynthetic capacity [11] and by increasing the uptake of water and nutrients, and their accumulation in the seedling tissues [3, 8] Environmental conditions marked by the Mediterranean ... species plus non-inoculated control plants One-month-old seedlings were inoculated with 10 mL of the target spore suspension of the corresponding fungus The final inoculum concentration was of 106 spores ... affect the growth of seedling roots also affect the development of ectomycorrhizas [24] Main factors affecting seedling mycorrhization in nursery are the fertilisation and irrigation regimes and the...
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Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx
Ngày tải lên :
08/08/2014, 00:22
... force of electron transport to the reduction of the redox state of the primary electron acceptor of PS II, which is approximated by 1–qP Figure also illustrates an estimate of the flux of electrons ... the experiment under MS and HS, at 45 days under LS (with exception of two seedlings) and at 60 days under FL (Fig 2) No seedlings initiated the third flush under HS and MS while 21 and 71% of ... conclusion, Quercus alba seedlings demonstrated clear photosynthetic acclimation and strong growth and allometric responses to light intensity After one growing season, the greatest diameter and...
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Báo cáo khoa học: "Effects of irrigation and nitrogen fertiliser on the growth and nutrient relations of Prunus avium L and ’Colt’ (Prunus avium x Prunus pseudocerasus) in the nursery and after transplantation" doc
Ngày tải lên :
08/08/2014, 19:21
... blocks of plots The allocation of treatment combinations to blocks was such that each of the degrees of freedom of the variety x nitrogen interaction and of the irrigation x nitrogen and variety ... Stem and shoot mineral concentrations influthe concentration of any of the minerals in the stem and shoots (fig 4) Irrigation did not significantly (P> 0.05) ence Early in the season the concentrations ... increase the concentration of extractable P in the soil (Bacon and Davey, 1992) and the concentration of P in the leaves of mature fruit trees in some years (Goode and Ingram, 1971; Atkinson, 1986)...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 1 pptx
Ngày tải lên :
15/12/2013, 00:15
... discussed above with the exception of the criterion ‘purity’ One should not only consider the impurities by alien particles, but also the hygienic condition of the diet Contamination of live food with ... ABSTRACT The cultivation of fish and shellfish larvae under controlled hatchery conditions requires not only the development of specific culture techniques, but in most cases also the production and ... 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 and...
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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
... 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 hatchery conditions, ... Another disadvantage is the need to prevent contamination during the initial inoculation and early growth period Because the density of the desired phytoplankton is low and the concentration of ... vary considerably according to the culture conditions For example the effect of the composition of the culture medium on the proximate composition of various species of micro-algae is demonstrated...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 3 ppt
Ngày tải lên :
15/12/2013, 00:15
... tract of the rotifers are killed as well The concentration of the disinfection products differs according to their toxicity and the initial condition of the rotifers Orientating concentrations ... 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 ... not only has a regulating effect on the microflora but also increases the production rate of the rotifers For stable rotifer cultures, the microflora as well as the physiological condition of the...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 4 pptx
Ngày tải lên :
15/12/2013, 00:15
... 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, ... seawater, they cannot migrate from one saline biotope to another via the seas, as they depend on their physiological adaptations to high salinity to avoid predation and competition with other filter ... parthenogenetic Artemia Age at first reproduction is a key factor determining the population growth rate, and the rate of colonisation of new environments with limited nutrient resources Consequently,...
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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
... 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 by the addition of ... release over 80% of their cellular water, and upon interruption of the aeration, the now coffeebean shaped decapsulated cysts settle out After harvesting of these cysts on a mesh screen they should ... example, for the culture of carp larvae 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...
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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
... 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 in freshwater ... investigations on isolated turbot cells have demonstrated that the conversion from EPA to DHA is very slow in turbot, and that direct supplementation with DHA might be beneficial for the larvae of this ... species However, the dosage and boosting with DHA during the early larval stages has to be considered with extreme care since the requirements of the larvae may not only depend upon their ontogenetic...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 7 pptx
Ngày tải lên :
15/12/2013, 00:15
... behavior of Artemia by affecting the filtration rate, ingestion rate and/ or assimilation: including the quality and quantity of the food offered, the developmental stage of the larvae, and the culture ... Pond production 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 ... to run under axenic conditions As a consequence the nutritional composition of the diet does not play the most critical role in the selection of diets suitable for high density culture of brine...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 8 pptx
Ngày tải lên :
15/12/2013, 00:15
... analysis of the algae samples is recommended Algae composition does not only influence growth and reproduction of the Artemia, but also has an effect on the nutritional value of the biomass and the ... bloom in high salinity ponds is difficult and can take more than one month The algae and organic matter created in the low salinity ponds are drained to the high salinity ponds and are there available ... manipulation of algae populations also depends on the composition of the local algae community The most dominant algae in the intake water often will also be the most dominant ones after fertilization...
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Tài liệu Manual on the Production and Use of Live Food for Aquaculture - Phần 9 pptx
Ngày tải lên :
15/12/2013, 00:15
... 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 of the ... transport the harvested zooplankton in 50 l containers Under these conditions the survival of the zooplankton depends on the amount of oxygen dissolved in the remaining water At a concentration of 100 ... 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 filtering...
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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
... in the broodpouch and the larvae are miniature versions of the adults In some cases the embryonic period does not correspond with the brood period, and this means that the larvae are held in the ... ready supply of larvae or “seed” for on- growing to market size The cultivation of fish and shellfish larvae under controlled hatchery conditions requires not only the development of specific culture ... 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...
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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 ... regionally variable and partially-offsetting, effects of BC on absorption and reflection of sunlight, reflectivity of clouds, and the strength of lower tropospheric convection (Wang, 2004) These ... reduce the warming induced by the capping of SOx Note that these climate calculations in Figure omit the cooling effects of the CO2 reductions caused by the lessening of the inhibition of the land...
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