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I. CAUSES OF THE DECLINE IN NUMBER OF CORBETT TIGERS IN VIETNAM
1. Massive Habitat and Prey Loss
Many years ago, when there were still rain forests covering 43% of the area, tigers distributed on the highland and midland. In the 1960s, VN had thousands of tiger living in nature.
The key findings from many years of study of tiger population have indicated that in many sites, tigers decline in numbers because of habitat loss and prey depletion rather than being killed directly. A tiger needs to eat about 50 deer-sized animals or 6,600 pounds of living prey every year. Wherever prey-base is adequate and good protection measures are in place tiger populations reach high numbers simply because the species breeds quickly. Prey species itself depend on conditions of the habitat.
Deforestation for land used in agriculture (expanding milpas, growing industrial plants), developing facilities (building roads, hydropower plants) or to exploit woods.
Extensive habitat loss and fragmentation has forced tigers to live in small, isolated pockets of remaining habitat, making it harder for tigers to reproduce. Increased road networks and reduced habitat size also leave tigers more exposed to poachers. The expansion of human activities in tiger habitat has led to overhunting of tiger prey species.
2. Lack of genetic diversity
The number of the tigers in nature is already low, the individuals distribute scatteredly into small populations, In addition, some localities are conducting or having plans to build interprovincial roads and facilities making the region for tiger population becomes narrower; no genetic exchange leads to “Bottle-neck effect”. This is a biological terminology. It means the state when some species’ fertility decline due to one reason or another and it has very low numbers. Due to decreasing quantity, mating with relatives is inevitable and will result in unhealthy offsprings who carry disadvantaged genes.
3. Human-Tiger Conflict
As the human
1. Massive Habitat and Prey Loss
Many years ago, when there were still rain forests covering 43% of the area, tigers distributed on the highland and midland. In the 1960s, VN had thousands of tiger living in nature.
The key findings from many years of study of tiger population have indicated that in many sites, tigers decline in numbers because of habitat loss and prey depletion rather than being killed directly. A tiger needs to eat about 50 deer-sized animals or 6,600 pounds of living prey every year. Wherever prey-base is adequate and good protection measures are in place tiger populations reach high numbers simply because the species breeds quickly. Prey species itself depend on conditions of the habitat.
Deforestation for land used in agriculture (expanding milpas, growing industrial plants), developing facilities (building roads, hydropower plants) or to exploit woods.
Extensive habitat loss and fragmentation has forced tigers to live in small, isolated pockets of remaining habitat, making it harder for tigers to reproduce. Increased road networks and reduced habitat size also leave tigers more exposed to poachers. The expansion of human activities in tiger habitat has led to overhunting of tiger prey species.
2. Lack of genetic diversity
The number of the tigers in nature is already low, the individuals distribute scatteredly into small populations, In addition, some localities are conducting or having plans to build interprovincial roads and facilities making the region for tiger population becomes narrower; no genetic exchange leads to “Bottle-neck effect”. This is a biological terminology. It means the state when some species’ fertility decline due to one reason or another and it has very low numbers. Due to decreasing quantity, mating with relatives is inevitable and will result in unhealthy offsprings who carry disadvantaged genes.
3. Human-Tiger Conflict
As the human
References: http://www.savetigersnow.org/solutions http://tigertribe.net/tigers-origin/tigers-killed/causes-for-decline-in-tiger-numbers/ http://www.savetigersnow.org/problem