Māori people peaceful tribes from their productive turangawaewae, such as the Moriori in the Chatham Islands by invading forces from North Taranaki, had a catastrophic effect on these conquered tribes. At the same time, the Māori suffered high mortality rates for new Eurasian infectious diseases, such as influenza, smallpox and measles, which killed an unknown number of Māori: estimates vary between ten and fifty percent. The spread of epidemics resulted largely from the Māori lacking acquired immunity to the new diseases. A huge influx of European settlers in the 1870s increased contact among many of the indigenous people with the newcomers. Te
Indigenous Australians island and the rest of mainland Australia during the last glacial period. Estimates of the population of the Aboriginal people of Tasmania, before European arrival, are in the range of 3,000 to 15,000 people although genetic studies have suggested significantly higher figures, which are supported by Indigenous oral traditions that indicate a reduction in population from diseases introduced by British and American sealers before settlement. The original population was further reduced to around 300 between 1803 and 1833 due to disease, warfare and other actions of British settlers. Despite over 170 years of debate over who or what was responsible