Enge E.,P.O. Box 59 |
Kroglund F.,Norwegian Institute for Water Research
Water, Air, and Soil Pollution | Year: 2011
We have examined populations of brown trout in low-conductivity mountain lakes (5.0-13.7 μS/cm and 0.14-0.41 mg/l Ca) in southwestern Norway during the period 2000-2010. Inlets to the lakes were occasionally even more dilute (2007; conductivity∈=∈2.9-4.8 μS/cm and Ca∈=∈0.06-0.17 mg/l). The combination of pH and conductivity was the best predictor to fish status (CPUE), indicating that availability of essential ions was the primary restricting factor to fish populations in these extremely diluted water qualities. We suggest that conductivity <5 μS/cm is detrimental to early life stages of brown trout, and subsequently that there are lakes in these mountains having too low conductivity to support self-reproducing trout populations. Limited significance of alkalinity, Ca, Al, and color suggests that effects of ion deficit apparently overruled the effects of other parameters. © 2010 Springer Science+Business Media B.V.
Shaalan I.,PO Box 59
Journal of Cleaner Production | Year: 2013
Urban transformation in Egypt is happening in a rapid, unorganized and informal manner. This is causing major environmental degradation problems. There are several significant environmental problems that face many newly transformed urban communities, such as municipal solid waste management, pollution of fresh water bodies, air pollution, noise and degradation of visual landscapes. This paper studies the case of urban transformation in Egypt with a focus on identifying and assessing the existing environmental conditions in Egyptian small cities, which have a population of less than 100,000 inhabitants. The paper analyses possible causes of the identified problems and the challenges that are associated with the urban transformation phenomenon in Egypt. The paper also looks at the linkages between urban planning and environmental management. © 2013 Elsevier Ltd. All rights reserved.
Pym R.A.E.,PO Box 59
World's Poultry Science Journal | Year: 2012
WPSA has played a pivotal role over the past 100 years in facilitating the development of the global poultry industry through the organization of branches in member countries and forums to identify and discuss issues, problems and their solution, as well as structures to disseminate that information. In this manner, WPSA has, since 1956, contributed significantly to the development of the Australian poultry industry. The Australian poultry industry has benefitted greatly over the years as a result of a well-supported and high quality national poultry research programme, facilitated through close cooperation between the poultry industry itself, national and state governments, and the country's research and education institutions. In response to the major projected increase in poultry meat and egg production and consumption in developing countries, WPSA has focussed increasing attention on facilitating efficient, sustainable and socially equitable poultry production in these countries. Associated with this, WPSA and WVPA are working towards a closer degree of cooperation and collaboration. Copyright © 2012 World's Poultry Science Association.