Management Strategies Of Combating Declining Populations

3237 WordsNov 19, 201413 Pages
The Sichuan partridge (Arborophila rufipectus): management strategies in combating declining populations Introduction The Sichuan partridge, one of the most threatened species, needs native habitats preserving to decrease the rate of decline (Dowell et al, 1999). The Sichuan partridge suffers from hunting and deforestation of native habitat in China. This was theorised using a population viability analysis (PVA) model, VORTEX, to model scenarios of varying management strategies. Laojunshan has been turned into a nature reserve in an attempt of protection (Liao et al, 2008). The aims of using VORTEX (Lacey and Pollak, 2014) was to analyse the success of management strategies including controlled hunting, supplementation, habitat restoration and corridors or a combination. VORTEX takes into account random events such as catastrophes running through iterations (replicas) to generate outcomes (Lacy, 1993). Each outcome will be assessed using probabilities of survival, genetic diversity and mean population sizes over a 200 year period. Methods To get a simulation output in VORTEX, data was entered for scenario settings which included invariable information such as reproductive rates, mortality rates, initial population size and carrying capacity along with catastrophes. These were found by research into breeding habits and life cycles, along with hunting which occurs in the Yangsiba reserve. The three management strategies assessed were habitat restoration and corridors,
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