Animals which, owing to their habits or Iife requirements come into competition with man and his lifestock, aptly named ""problem animals"", rate a high priority in the scheduled research projects undertaken by the Nature Conservation and Tourism Division of the South West Africa Administration. With the Hartmann zebra the problem arises that it is both an endangered species as well as a problem animal.
White Pelicans Pelecanus onocrotalus were recorded breeding on the Etosha Pan for the first time in 1971. The breeding colony of c. 3000 pairs was situated on flat, dry ground. The nearest water for fishing was 100 km distant, at Lake Oponono, and the pelicans used lifting air themals to glide there and back. Disturbances elsewhere caused the pclicans to abandon two earlier nesting attempts and were probably the reason why they chose the isolation of the Etosha Pan.
All four of the known varieties of L. dinlari Schwant., including the new one descriptionbed here, occur in close proximity to the Orange River, i.e. within 30 km (about 20 miles) to the north or south, along the section where, between Onseepkans and the Richtersveld, it flows almost directly from east to west.
Since the publication of Lithops gulielmi L. Bol. in 1937, with type locality given as ""farm Florida"", there has been considerable doubt and uncertainty about this taxon. Descriptions and illustrations appearing in subsequent publications differ substantially from the original diagnosis, and plants collected at the type locality did not conform to any of the pubIished descriptionptions.
Zebra (Equus zebra hartmannae and E. burchelli antiquorum) were subjected to stress which gave rise to elevation of cardiac rate, haematrocit, plasma osmolality and plasma levels of glucose, lactate and creatine kinase. These changes were very similar to those observed in animals actually suffering from capture myopathy. It was therefore tentatively concluded that incipient: signs of shock and therefore of capture myopathy were evident in the chased group of animals.