Actually, it isn't always about us, mankind. Sometimes it is about microbes and other things.
http://theconversation.com/why-did-the-tasmanian-tiger-go-extinct-11324
The government bounty may seem to be the obvious extinction culprit. But growing scientific evidence reveals a complex tapestry of forces involved in their decline. Among these are competition with dogs, habitat loss and changing fire regimes leading to population fragmentation, and an epidemic disease that spread through the population in the 1920s.
According to Wikipedia:
The thylacine is likely to have become near-extinct in mainland Australia about 2,000 years ago, and possibly earlier in New Guinea.[SUP]
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[COLOR=0066CC][59][/COLOR][/SUP] The absolute extinction is attributed to competition from indigenous humans and
[COLOR=0066CC]invasive[/COLOR] dingoes. However, doubts exist over the impact of the dingo since the two species would not have been in direct competition with one another as the dingo
[COLOR=0066CC]hunts primarily during the day[/COLOR], whereas it is thought that the thylacine
[COLOR=0066CC]hunted mostly at night[/COLOR]. In addition, the thylacine had a more powerful build, which would have given it an advantage in one-on-one encounters.[SUP]
[COLOR=0066CC][60][/COLOR][/SUP] Recent morphological examinations of dingo and thylacine skulls show that although the dingo had a weaker bite, its skull could resist greater stresses, allowing it to pull down larger prey than the thylacine could. The thylacine was also much less versatile in diet than the omnivorous
[COLOR=0066CC]dingo[/COLOR].[SUP]
[COLOR=0066CC][61][/COLOR][/SUP] Their environments clearly overlapped: thylacine
[COLOR=0066CC]subfossil[/COLOR] remains have been discovered in proximity to those of dingoes. The adoption of the dingo as a hunting companion by the indigenous peoples would have put the thylacine under increased pressure.[SUP]
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Prideaux
et al. (2010) examined the issue of extinction in the late Quaternary period in southwestern Australia. This paper notes that Australia lost 90% or more of its larger terrestrial vertebrates during this time, with the notable exceptions of the kangaroo and the thylacine. The results show that the humans were obviously one of the major factors in the extinction of many species in Australia. But in reality, it was not until the humans had an adverse effect on the environment and brought disease to Australia that their arrival drove the Thylacine to extinction.[SUP]
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Menzies
et al. (2012) examined the relationship of the genetic diversity of the thylacines before their extinction. The results of their investigation indicated that the last of the thylacines in Australia, on top of the threats from dingoes, had limited genetic diversity, due to their complete geographic isolation from mainland Australia.[SUP]
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Johnson and Wroe (2003) observed the relationship between the dingo and the extinctions of the Tasmanian devil, the Thylacine, and the Tasmanian native hen and the arrival of humans. The paper observed the obviously competitive relationship between the dingo and the thylacine and the Tasmanian devil, and noted that the dingo may have actually fed on the native hen. Yet, the paper concludes, people ignore the emergence of humans on the continent among all of this. In the end, the competitiveness of the dingo and Thylacine populations led to the extinctions of the Thylacine but the arrival of the humans only further exacerbated this.[SUP]
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Another study brings disease into the debate as a major factor in thylacine's extinction: "Casually collected anecdotal records and early boutity analyses have, at times, prompted the suggestion that disease was a major factor in the extinction of the species, that occurred when the last known specimen died in Hobart Zoo during the night of 7th September, 1936."[SUP]
[COLOR=0066CC][65][/COLOR][/SUP] This study also suggests that were it not for an epidemiological influence, the extinction of thylacine would have been at best prevented, at worst postponed. "The chance of saving the species, through changing public opinion, and the re-establishment of captive breeding, could have been possible. But the marsupi-carnivore disease, with its dramatic effect on individual thylacine longevity and juvenile mortality, came far too soon, and spread far too quickly."[SUP]
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