The aims of the study were to: 1) determine the wildlife population trends in the Mara Enoonkishu Conservancy from the eyes and minds of the public, 2) assess the recent trends in wildlife populations based on actual ...The aims of the study were to: 1) determine the wildlife population trends in the Mara Enoonkishu Conservancy from the eyes and minds of the public, 2) assess the recent trends in wildlife populations based on actual scientific counts, and 3) compare the two patterns and establish whether they are similar or not. The solicitation of public views was based on household surveys using a standard questionnaire which was administered to 115 randomly selected respondents. The dominant wildlife species according to 39% of the respondents was the elephant followed by the zebra with 35%. 40% of the respondents indicated that the rhino population had declined followed by wild dogs (7%) and cheetah (6%). The actual counts showed that the herbivores with increasing populations included the rhino (r<sup>2</sup> = 0.9992), impala (r<sup>2</sup> = 0.9824), Thomson’s gazelle (r<sup>2</sup> = 0.6965), Grant’s gazelle (r<sup>2</sup> = 0.7052), elephant (r<sup>2</sup> = 0.5798), and topi (r<sup>2</sup> = 0.4426) while the increasing predators included the lion (r<sup>2</sup> = 1.000), cheetah (r<sup>2</sup> = 0.9093) and hyena (r<sup>2</sup> = 0.8462). The actual wildlife counts appeared to tally with the public views only for the elephant and zebra. The actual counts contradicted the public views in terms of the rhino, lion and gazelles whose numbers were on the increase but the people did not appear to notice. Based on this, it was concluded that the public view on the wildlife population trend was not similar to the actual wildlife population status on the ground based on scientific monitoring.展开更多
In this paper,five different models for five different kinds of diseases occurring in wildlife populations are introduced.In all models,a logistic growth term is taken into account and the disease is transmitted to th...In this paper,five different models for five different kinds of diseases occurring in wildlife populations are introduced.In all models,a logistic growth term is taken into account and the disease is transmitted to the susceptible population indirectly through an envi-ronment reservoir.The time evolution of these diseases is described together with its spatial propagation.The character of spatial homogeneous equilibria against the uniform and non-uniform perturbations together with the occurrence of Hopf bifurcations are discussed through a linear stability analysis.No Turing instability is observed.The partial differential field equations are also integrated numerically to validate the stability results herein obtained and to extract additional information on the temporal and spatial behavior of the different diseases.展开更多
文摘The aims of the study were to: 1) determine the wildlife population trends in the Mara Enoonkishu Conservancy from the eyes and minds of the public, 2) assess the recent trends in wildlife populations based on actual scientific counts, and 3) compare the two patterns and establish whether they are similar or not. The solicitation of public views was based on household surveys using a standard questionnaire which was administered to 115 randomly selected respondents. The dominant wildlife species according to 39% of the respondents was the elephant followed by the zebra with 35%. 40% of the respondents indicated that the rhino population had declined followed by wild dogs (7%) and cheetah (6%). The actual counts showed that the herbivores with increasing populations included the rhino (r<sup>2</sup> = 0.9992), impala (r<sup>2</sup> = 0.9824), Thomson’s gazelle (r<sup>2</sup> = 0.6965), Grant’s gazelle (r<sup>2</sup> = 0.7052), elephant (r<sup>2</sup> = 0.5798), and topi (r<sup>2</sup> = 0.4426) while the increasing predators included the lion (r<sup>2</sup> = 1.000), cheetah (r<sup>2</sup> = 0.9093) and hyena (r<sup>2</sup> = 0.8462). The actual wildlife counts appeared to tally with the public views only for the elephant and zebra. The actual counts contradicted the public views in terms of the rhino, lion and gazelles whose numbers were on the increase but the people did not appear to notice. Based on this, it was concluded that the public view on the wildlife population trend was not similar to the actual wildlife population status on the ground based on scientific monitoring.
基金This paper was supported by Gruppo Nazionale di Fisica Matematica(GNFM)dell'INdAMby the Italian research Project PRIN 2017 Multiscale phenomena in Continuum Mechanics:singular limits,out-equilibriunh and transitions.
文摘In this paper,five different models for five different kinds of diseases occurring in wildlife populations are introduced.In all models,a logistic growth term is taken into account and the disease is transmitted to the susceptible population indirectly through an envi-ronment reservoir.The time evolution of these diseases is described together with its spatial propagation.The character of spatial homogeneous equilibria against the uniform and non-uniform perturbations together with the occurrence of Hopf bifurcations are discussed through a linear stability analysis.No Turing instability is observed.The partial differential field equations are also integrated numerically to validate the stability results herein obtained and to extract additional information on the temporal and spatial behavior of the different diseases.
