What is the so-called bottle-neck effect?
There is the word ” bottle-neck effect” in 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. Many endangered animals like cheetahs have faced the problem when their quantity is below certain number. South China Tigers and David’s deer are both faced with bottleneck effect. Now David’s deer survived thanks to the only 25 deer translocated to Europe before the People’s Republic of China was established . Had we not pulled the deer back from the bottleneck, it might have already died out. Therefore, the question now is whether we ought to pull the Chinese tigers back from the bottleneck too?
