[The Conversation Africa] A tiger escaped from a residence and roamed the countryside outside Johannesburg, South Africa, for four days this month. It attacked a man and killed several animals, and was eventually shot by the authorities. Tigers aren't native to South Africa and are considered an alien species. Its escape highlights the country's controversial commercial captive breeding industry and the key role South Africa plays in the international big cat trade. Tigers are being intensively farmed for tourism, hunting, and comm