| Gurralax courtoisi is listed on the IUCN's critically endangered species,their breeding season activity basic limited to wuyuan county river within the territory of fung shui woods near the village.From 2016 to 2017 in May-June,by using the method of radio telemetry breeding season range were investigated,using the minimum convex polygon method(MCP)and core density estimation method two methods for blue crown noise plants breeding site area was calculated.To April 2017-July 2012,the main breeding in wuyuan reproduction of small group(nest egg number,number of chicks,reproductive success,etc.)were investigated,according to the results of this study,related species and collect the related data,its population viability in the VORTEX9.99 model was analyzed,and assess the risk of extinction of species,to predict the population change trend of the next 50 years,through the model forecasts the blue crown noise plants under different conditions of population change,and to assess the influence of various parameters on the trend of extinction.The average home range area of Blue-crowned Laughingthrush is 0.1096 km2 withMCP,the average area of KDE is 0.303 km2,all individuals are overlapping and some individual home range area almost completely overlap,all of individuals belong to the same population,and is relatively stable in the breeding area.Population viability analysis was conducted for the laughingthrush population through vortex 9.99 model,to predict the trends of population under natural and other scenes during next 50 years.The result showed that extinction rates of the population was 41%.The model experiments showed that increase of mortality rates led extinction rates to 100%,and maximum age of reproduction is important for the survival of population,so does the sex ratio.Habitat protection should be strengthened,control the intensity of human disturbance,actively seeking suitable habitat,strengthen the propaganda education in local villagers. |
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