Tài liệu Impact on the environment ppt

... Version 00 Date: Impact on the environment Managementhandbook 01 - Chapter 10 page 1 of 3 . Impact on the environment By our operational activities also effects on the environment ... resources application in combinations with a environmental-careful way of production we want to achieve a preventive environmental protection. We evaluate our impact...

Ngày tải lên: 22/12/2013, 02:17

... rise. • This leads to disruption of the weather patterns eg drought, floods • Some weeds may thrive on the extra carbon dioxide while other plants are killed Biological Control of Pests • This means ... from the water • This means the fish suffocate and die • This process is called Eutrophication • Raw sewage pumped into rivers has the same effect The Influence of Human A...

Ngày tải lên: 26/01/2014, 10:20

... tremendous 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 ... Applications for such permission, with a statement of the purpose and extent of the reproduction, should be addressed to the Director, Information Division, Food...

Ngày tải lên: 15/12/2013, 00:15

... specific environmental conditions. These can be the result of changes in environmental conditions eventually creating alternations in temperature or salinity or 3.5.1.6. Bacteria Pseudomonas and ... 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 Brachio...

Ngày tải lên: 15/12/2013, 00:15

... 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, ... populations, as well as the study of prevailing environmental conditions. Uncontrolled introduction of Artemia may thus lead to a decrease of natural variability. Therefore, b...

Ngày tải lên: 15/12/2013, 00:15

... to the bottom; after about 30 minutes the Artemia respond to the oxygen depletion by concentrating at the water surface where they perform surface respiration. The concentrated population, ... 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 mov...

Ngày tải lên: 15/12/2013, 00:15

... added to the fertilization ponds or canals, while manure can be added directly to the Artemia culture ponds or to the fertilization ponds. If possible, salinity in the fertilization ponds should ... outcompete this local one. The strain with the highest number of offspring under the local environmental conditions will eventually outcompete the other. However, initial popu...

Ngày tải lên: 15/12/2013, 00:15

... 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 zooplankton concentration in the water ... practise is to concentrate and transport the harvested zooplankton in 50 l containers. Under these conditions the survival of the zooplankton depends on the amount of...

Ngày tải lên: 15/12/2013, 00:15

... extinguished population after unfavourable seasonal conditions. 6.1.2. Nutritional value of Daphnia The nutritional value of Daphnia depends strongly on the chemical composition of their food source. ... photoperiods. These conditions are generally obtained with aging populations at the end of the season. Collection of the ephippia from the wild can be carried out by taking...

Ngày tải lên: 15/12/2013, 00:15