Hervé-Claude Luis Pablo, Lwanga-Iga Ivan, Kroll-Lwanga-Iga Sabine, Nyangiwe Nkululeko, Ruddat Inga, Kreienbrock Lothar
Department of Biometry, Epidemiology and Information Processing, WHO-Collaborating Centre for Research and Training in Veterinary Public Health, University for Veterinary Medicine, Buenteweg 2, 30559, Hannover, Germany.
Trop Anim Health Prod. 2011 Mar;43(3):573-80. doi: 10.1007/s11250-010-9733-9. Epub 2010 Nov 17.
There is an urgent need for a livestock census in communal areas of the Eastern Cape Province, South Africa. This study focuses on the description of the cattle, sheep, and goat populations with emphasis on the livestock distributions and population characteristics in a pilot study in two wards in communal farm land. In one of the wards, sample homogeneity was found in the cattle and goat populations. In contrast, in the second ward sheep and goat populations were found heterogeneous, and only cattle showed homogeneity. As a consequence, the use of a simple random sampling strategy for the livestock population can be recommended in one ward whereas a more complex stratified random sampling strategy is recommended for the other. The organization and logistics costs must be taken into consideration when organizing a livestock census. Therefore, the observations of this study prepare the decision on sampling schemes for future census activities. The possibility of using a complete enumeration census should not be discarded especially in areas with heterogeneous livestock populations where the organization of a complex sampling strategy can prove to be time-consuming and complicated to be executed in the field.
南非东开普省的公共区域迫切需要进行一次牲畜普查。本研究着重描述牛、羊和山羊的数量情况，重点关注公共农田两个行政区试点研究中的牲畜分布和种群特征。在其中一个行政区，牛和山羊种群具有样本同质性。相比之下，在第二个行政区，绵羊和山羊种群存在异质性，只有牛表现出同质性。因此，对于一个行政区，可以推荐使用简单随机抽样策略来统计牲畜数量，而对于另一个行政区，则推荐使用更复杂的分层随机抽样策略。组织牲畜普查时必须考虑组织和后勤成本。因此，本研究的观察结果为未来普查活动的抽样方案决策提供了依据。尤其在牲畜种群异质性较高的地区，不应排除采用全面普查的可能性，因为在这些地区组织复杂的抽样策略可能会耗时且在实地执行起来很复杂。
