Territoriality of the otter Lutra lutra L.

摘要: Otters were studied by reading tracks and signs in fresh water habitats Southern Sweden, 1958-1966. 1. The populations winter consisted of 30-40% resident territory holders, about the same proportion temporary residents or transients 25-38% young year. rate reproduction otters is low. Most probably some females do not breed every density areas was one otter per 0.7-1.0 km2 area individual 2-3 km length lake shore, 5 a stream. 2. display territorial behaviour which shown signal activity, dispersion pattern movements otters. 3. adult dog maintain territories have an character, their size location depending on qualities dogs. boundaries are overlapping zones where conflicts occur continuously. 4. with cubs (family groups) exploit separately. fixed situated within otters' territories. Territorial between family groups rare, after been