Tierra es un canto a la belleza de nuestro planeta y un recordatroio de la delicada fragilidad del lugar donde vivimos. Este viaje inolvidable a través de las distinta estaciones y de la lucha diaria por la supervivencia en nuestro planeta, está rodado con las más novedosas cámaras de alta definición. Desde los increibles paisajes nunca vistos, hasta los detalles más íntimos de las vidas de nuestras queridas y esquivas criaturas salvajes.
The material within these proceedings represents a summary for 2009–2016 on the state of knowledge and conservation concerns for polar bears throughout their range. The difficulties in studying a species that ranges widely, at low densities, and in one of the world’s most remote and environmentally challenging regions is evident in these proceedings. This report describes the current and future challenges and the conservation efforts needed to ensure the survival of polar bears.
Problems of the North no.11 is devoted to the biological and ecological bases for the proper utilization, reestablishment, and conservation of wildlife (fur-bearing animals, marine mammals, fish and game birds). It contains much original data on the biology and ecology of individual species (including the polar bear, arctic fox, wild reindeer, and mountain sheep). This research work is also of importance with respect to zoo-geography. A substantial part of this issue is devoted to marine mammals and problems associated with the harvesting of marine mammals.
