Navigation Links
Disease not a factor in Tassie Tiger extinction
Date:1/31/2013

Humans alone were responsible for the demise of Australia's iconic extinct native predator, the Tasmanian Tiger or thylacine, a new study led by the University of Adelaide has concluded.

Using a new population modelling approach, the study contradicts the widespread belief that disease must have been a factor in the thylacine's extinction.

The thylacine was a unique marsupial carnivore found throughout most of Tasmania before European settlement in 1803. Between 1886 and 1909, the Tasmanian government encouraged people to hunt thylacines and paid bounties on over 2000 thylacine carcasses. Only a handful of animals were located after the bounty was lifted and the last known thylacine was captured from the wild in 1933.

"Many people, however, believe that bounty hunting alone could not have driven the thylacine extinct and therefore claim that an unknown disease epidemic must have been responsible," says the project leader, Research Associate Dr Thomas Prowse, School of Earth and Environmental Sciences and the Environment Institute.

"We tested this claim by developing a 'metamodel' a network of linked species models that evaluated whether the combined impacts of Europeans could have exterminated the thylacine, without any disease."

The mathematical models used by conservation biologists to simulate the fate of threatened species under different management strategies (called population viability analysis or PVA) traditionally neglect important interactions between species. The researchers designed a new approach to PVA that included species interactions.

"The new model simulated the directs effects of bounty hunting and habitat loss and, importantly, also considered the indirect effects of a reduction in the thylacine's prey (kangaroos and wallabies) due to human harvesting and competition from millions of introduced sheep," Dr Prowse says.

"We found we could simulate the thylacine extinction, including the observed rapid population crash after 1905, without the need to invoke a mystery disease.

"We showed that the negative impacts of European settlement were powerful enough that, even without any disease epidemic, the species couldn't escape extinction."


'/>"/>
Contact: Dr. Thomas Prowse
thomas.prowse@adelaide.edu.au
61-431-480-729
University of Adelaide
Source:Eurekalert

Related biology news :

1. Parkinsons disease stopped in animal model
2. Disease-carrying colonizers on the move: Predicting the spread of ticks across Canada
3. U of Alberta researcher steps closer to understand autoimmune diseases
4. Common North American frog identified as carrier of deadly amphibian disease
5. New insight into mechanisms behind autoimmune diseases suggests a potential therapy
6. Genetic research develops tools for studying diseases, improving regenerative treatment
7. Researchers discover novel therapy for Crohns disease
8. New hope for treating Alzheimers Disease: A role for the FKBP52 protein
9. Low-calorie diet may be harmful for bowel disease patients
10. Key to immune system disease could lie inside the cheek
11. Cell therapy using patients own bone marrow may present option for heart disease
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/8/2017)... , Feb. 8, 2017 About Voice ... voice to match it against a stored voiceprint ... as pitch, cadence, and tone are compared to ... minimal hardware installation, as most PCs already have ... different transactions. Voice recognition biometrics are most likely ...
(Date:2/7/2017)... Feb. 7, 2017   MedNet Solutions , an ... spectrum of clinical research, is pleased to announce that ... its innovative, highly flexible and award winning eClinical solution, ... iMedNet is a proven Software-as-a-Service (SaaS) clinical ... Capture (EDC), but also delivers an entire suite of ...
(Date:2/3/2017)... A new independent identity strategy consultancy firm ... . Designed to fill a critical niche in technical ... partners Mark Crego and Janice Kephart ... identity expertise that span federal governments, the 9/11 Commission, ... combined expertise has a common theme born from a ...
Breaking Biology News(10 mins):
(Date:2/20/2017)... , Feb. 20, 2017  At the 2017 ... Orlando , IBM (NYSE: ... and clients. IBM Chairman, President and CEO ... keynote address today from 8:30-10 am ET, broadcast ... and ibm.com/industries/healthcare. Her remarks examine the advent of ...
(Date:2/18/2017)... IL (PRWEB) , ... February 17, 2017 , ... ... Blood and Marrow Transplantation (ASBMT) and the Center for International Blood & Marrow ... Convention Center in Orlando, Fla. , The combined scientific sessions offer ...
(Date:2/17/2017)... 17, 2017  BioGenex, a global leader in ... a novel system for quantitative immunohistochemistry (IHC). The ... of Rochester (NY, USA) and Konica-Minolta Inc. ( ... is able to accurately quantify the expression of ... growth factor receptor-2) in clinical samples. Quantitative IHC ...
(Date:2/16/2017)... ... 16, 2017 , ... EIT Digital has launched work to develop ... Pilot studies are about to get under way for the framework, which is designed ... The concept is expected to be transferred eventually to other industries that also require ...
Breaking Biology Technology: