KATHMANDU: Department of National Park and Wildlife Conservation is organising various programmes to mark the seventh World Tiger Day on Saturday. This year's International Tiger Day would be celebrated with the slogan 'Fresh Ecology For Tigers' Protection'. The conference of the heads of 13 countries – where tigers are available – held at Saint Petersburg of Russia in 2010 took the decision to mark the world tiger day on July 29 every year. As per the decision of the conference to double the number of tigers by 2020, Nepal has also been increasing its efforts for the conservation of tigers. Data shows that number of tigers has increased from 121 in 2009 to 198 in 2013. The Department's Under Secretary Bishnu Prasad Shrestha informed that the census of tiger would be taken this year as it is conducted in every four years in Nepal.