Thursday, November 23, 2017
Contact us    |    Advertise    |   Help   RSS icon Twitter icon Facebook icon
    Home  ·  News  ·  Forum  ·  Stories  ·  Image Gallery  ·  Columns  ·  Encyclopedia  ·  Videos
Find: in

Did drought cause mainland thylacine decline?


Posted on Thursday, 28 September, 2017 | Comment icon 16 comments

Thylacine numbers plummeted around 3,000 years ago. Image Credit: Benjamin A. Sheppard
Drought, rather than human hunting, may have wiped out the Tasmanian tiger on the Australian mainland.
While human hunting is thought to have been primarily responsible for wiping out the last few remaining thylacines in Tasmania during the early 20th century, a conclusive explanation for their disappearance from the mainland of Australia 2,000 years earlier has remained a lot more elusive.

Now though, by extracting DNA samples from fossil bones and museum specimens, researchers from the University of Adelaide's Australian Center for Ancient DNA may have finally solved the mystery.

Their research involved creating the biggest dataset of thylacine DNA to date and then using that to build up a picture of how the animals' population sizes varied over time.

The results suggested that, rather than being wiped out by human hunting or the introduction of wild dogs, the primary factor in the demise of the thylacine from the mainland of Australia was actually an extensive period of drought which decimated their numbers around 3,000 years ago.

"We also found evidence of a population crash, reducing numbers and genetic diversity of thylacines, in Tasmania around the same time," said ACAD deputy director Jeremy Austin.

"Tasmania would have been somewhat shielded from the warmer, drier climate because of its higher rainfall, but it appears that this population was also affected by the El Nino event before starting to recover."

Source: Phys.org | Comments (16)

Tags: Thylacine, Tasmanian Tiger

Recent comments on this story
Comment icon #7 Posted by Astra. on 29 September, 2017, 22:19
Thank you for your input oldrover, you certainly seem to know muchconcerning the history ofthis extinct animal. From what I have gathered tho, these creatures were targeted from the year1830 to 1909. Apparently there were thousands slaughtered because of a bounty offered. Even after the animal becamescarce, the bounty still remained opened. The reason for this hysterical culling was that thetiger was blamed for killing sheep, where as the dingo was probably the real culprit for killing the sheep on the mainland.It's still a sad story to say the least for the Tassie tiger. All in all, it ... [More]
Comment icon #8 Posted by qxcontinuum on 30 September, 2017, 4:26
no, it was humans causing their existence like many other Australian animals
Comment icon #9 Posted by oldrover on 30 September, 2017, 13:45
Yes, there were several bounty schemes. But only in Tasnania, and the paper only deals with the earlier mainland extinction. Climate change played no part inthe Tasmanian extinction, that was purely hunting, although not as is often suggested, by dedicated tiger hunters. We still killed all the thylacines, but it wasn't the bounty schemes that drove us, in most cades the tigers were a by product of general fur trapping. Dingoes don't come into it, where there were dingoes and sheep, there were no thylacines, and where there were sheep and thylacines there were no ding0es. Just feral dogs.
Comment icon #10 Posted by oldrover on 30 September, 2017, 13:50
The governmentsbounty scheme ended in 1909, after a crash in numbers in that year, although numbers had halved in 07 and 08 from usual. The Van Diemen's Land Company schemelasted till 1914 atWoolnorth, a big sheep station in the NW. But no payments had been made for several years. The big rush in tje next two decades was for scientiffic and zoo specimens, or at least that's who the yrappers sold to. But still they were just caught rarely, and by people tarhetting possum and wallaby prlts. That's where the real money was.
Comment icon #11 Posted by Astra. on 1 October, 2017, 2:37
That's very interesting. Can you provide any articles / records that may explain this in further detail..as I am genuinely curious. As I have mentioned earlier, you seem to be rather knowledgeable about the extinction of Australia's thylacines, especially from a personwho livesinWales. May I ask, what got you so interested in this particular species of extinctanimal ?...
Comment icon #12 Posted by Astra. on 1 October, 2017, 2:42
Did you mean to say 'extinction'...rather than'existence' qx.....or am I going to be sorry that I even bothered to ask...
Comment icon #13 Posted by qxcontinuum on 1 October, 2017, 3:27
yup ...funny... to heck with this spelling self checker.
Comment icon #14 Posted by oldrover on 1 October, 2017, 11:17
My interest in the thylacine dates back to when I was a kid, when I first saw the animatronic tiger used in the ABC series the 'Nature of Australia'. https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQ-vuyXmjU3nL6Q4v5MLeqAxRuHk5ILhnmxaRU5XSVWQSDWZofkhA It looks pretty dismal to menow, very cliched, completely the wrong colour, and not really like one at all, but at time and never having heard of them before it captivated me completely. That was 30 years ago, nowadays I'm researching the background to the 'last tiger at the zoo'. A short biography of Elias Churchill the man who's credited... [More]
Comment icon #15 Posted by Astra. on 1 October, 2017, 14:58
Cheers oldrover, I'll check out some of those sources that you have shared as soon as I get the time. I appreciate all of yourinformation...
Comment icon #16 Posted by Nostrodumbass on 5 October, 2017, 15:34
Maybe dying was the cause of the decline.


Please Login or Register to post a comment.


  On the forums
Forum posts:
Forum topics:
Members:

6037127
259290
171258

 
 Extraterrestrial Life & The UFO Phenomenon
  Contact - the Objective Evidence
  I was born on Mars... claims Boy
  Mystery still surrounds UFO over Oregon
 Spirituality, Religion and Beliefs
  Gnostic Revelation.
  Evolution of Spirit
  Suicide Kings
Dolly the sheep had no health abnormalities
11-23-2017
A new study has indicated that the famous cloned sheep had not suffered from any abnormal health issues.
Mars liquid water discovery cast in to doubt
11-23-2017
Dark streaks on the Martian surface thought to be evidence of water may actually be little more than sand.
NASA reveals Cassini 'farewell Saturn' image
11-22-2017
A breathtaking mosaic of the iconic ringed gas giant has been put together by the Cassini mission team.
Mature white crocodile sighted in Australia
11-22-2017
Nicknamed Pearl, the reptile was seen swimming around in the Adelaide River near Darwin on Sunday.
Featured Videos
Gallery icon 
The rainbow turkey
Posted 11-23-2017 | 1 comment
This turkey has gorgeous iridescent feathers but you won't be eating it for Thanksgiving.
 
What do we know of the giant squid ?
Posted 11-20-2017 | 1 comment
The giant squid is so elusive that it took until 2004 for someone to photograph a live specimen.
 
Slow motion katana slice
Posted 11-18-2017 | 0 comments
The Slo Mo Guys attempt to slice through a row of water bottles using a katana sword.
 
What happened to the Library of Alexandria ?
Posted 11-17-2017 | 5 comments
What really happened to the vast wealth of knowledge stored in the ancient library ?
 
World's largest sticker ball
Posted 11-14-2017 | 1 comment
This enormous ball of stickers contains somewhere in the region of 200,000 stickers.
 
 View: More videos
Stories & Experiences
Strange occurrences
11-15-2017 | Fife
 
Mysterious music box song
11-15-2017 | U.S.A
 
Haunted military house
10-23-2017 | New Zealand
 
Sleep paralysis or real encounter?
10-18-2017 | United Kingdom
 
Ghost playing with a balloon?
10-18-2017 | Australia
 
Impossible phone call
10-18-2017 | West Virginia
 
Seeing cats
10-18-2017 | Santa Rosa
 
Fourth of July UFO show
10-18-2017 | Hillsboro ND
 
Guardian angel ?
9-13-2017 | Middle of nowhere Iowa
 

         More stories | Send us your story
 
Top   |  Home   |   Forum   |   News   |   Image Gallery   |  Columns   |   Encyclopedia   |   Videos   |   Polls
UM-X 10.7 Unexplained-Mysteries.com 2001-2017
Privacy Policy and Disclaimer   |   Cookies   |   Advertise   |   Contact   |   Help/FAQ