Browsing Faculty of Medicine, Dentistry and Life Sciences by Authors
Chapter Ten: Handling and Restraint of Small RuminantsMcLennan, Krista M.; Chapman, Stella; University of Chester; University Centre Hartpury (Wiley, 2017-11-03)Sheep (Ovis aries) were one of the first mammals to be domesticated by humans; however the exact timeline of events has been unclear. The use of mitochondrial DNA testing has recently made it possible to trace back the ancestry of many animals including cattle, horses, pigs and goats and evidence suggests that the number of wild progenitors for these species is limited; however, with the sheep this is not the case and it is thought that a large number of wild ancestral species and subspecies exist (Hiendleder et al. 2002). Archaeological findings have traced the sheep back to 11000 and 9000 BC in Mesopotamia, with the most common hypothesis being that Ovis aries descended from the Asiatic (Ovis orientalis) species of mouflon. Many studies have looked at the ancestry of sheep and there has been conflicting evidence with regards to the numbers of ancestors. It is now thought that three major groups of Eurasian wild sheep (mouflon, urial and argali) are the ancestors of the domestic sheep and it is these groups that are believed to have contributed to specific breeds (Hiendleder et al. 2002).
Chapter Twelve: Handling and Restraint of South American CamelidsMcLennan, Krista M.; Chapman, Stella; University of Chester; University Centre Hartpury (Wiley, 2018-01-01)Members of the camelid family evolved to live in arid and mountainous areas. This chapter will focus on what are known as the New World species of camelid, whose habitat mainly covers the Andes regions of South America. Four camelids can be found in South America, namely: Guanacos (Lama guanicoe), vicunas (Lama vicugna), llamas (Lama guanicoe glama) and alpacas (Vicugna pacos). The two wild forms, the guanaco and the vicuna diverged from a common ancestor approximately two million years ago; an event unrelated to domestication. Due to hybridisation the exact process of domestication has been controversial; however, recent genetic analysis has suggested that the alpaca is the domesticated form of the vicuna and the llama is the domesticated form of the guanaco (Kadwell et al. 2001). Domestication is thought to have taken place some 6000 years ago (Wheeler, 1995) when a predominant herding economy based on llama and alpaca was established at Telarmachay (a region of the Peruvian Andes). Archaeological evidence suggests that both llamas and alpacas were part of a sacrificial rite in South American culture and were key to the expansion of the Inca Empire some 500 years ago (Bonacic, 2011). Physically (apart from size) there is little difference between the llama and alpaca, which is a result of deliberate hybridisation between the two species over the past 35 years. Whilst the alpaca and llama still play an important role in their countries of origin, they are also viewed worldwide as: pets, exotic animals, livestock, zoo animals and wild animals.