sentences:  It is estimated that zoos, aquariums and zoo and aquarium associations jointly expend in excess of 50 million euros per year for such projects.Reintroduction and restocking projects have been undertaken with about 200 species.In addition, in situ activities include now often also educational programmes aimed at the local people and at the politicians, biological programmes (research and monitoring), socio-economic projects, social work among the local people, public relations activities and much more on a national and international scale – all in order to secure the conservation efforts far into the future.