This study was conducted in the Liupanshan National Nature Reserve (35°15′－35°41′ N, 106°09′－106°30′ E), Ningxia Hui Autonomous Region, northwestern China. The reserve covers approximately 67,800 hect
Recordings were made of adult male and female Weddell seals on the ice during the breeding seasons of 1990 and 1997. The recordings were made near Davis, Antarctica in the Vestfold Hills. The vocali
