Surabaya Zoo performed on the animals found plastic and wood inside the animals. The death of Melani the tiger, one of only a few hundred Sumatran tigers left in the world, outraged animal activists when it was discovered that the tiger was suffering from extreme digestive disorders before being rescued from the zoo. On 28 January 2014 Surabaya Zoo authority announced that the zoo has a collection of 3,459 animals from 197 species, but 81 animals are sick, disabled, and old, and 44 of which are in severe conditions. An online petition that calls for the closure of Surabaya Zoo due to
Riga Zoo 88 species at the time. Many animals were donated to the zoo; in 1914, the zoo received 538 animals. During World War I the zoo experienced hardships and closed in August 1917 after German army occupied Riga city; after the war a camp for children of low income families was established at the site. On 29 December 1932 a society was established, which renewed the zoo and it was reopened on 24 September 1933 housing 124 animals of 48 species; by 1938 number of species had increased to 106. During World War II the development of the zoo stalled; however,