Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Orphaned elephants forced to forge new bonds decades after ivory ban

21.01.2009
An African elephant never forgets – especially when it comes to the loss of its kin, according to researchers at the University of Washington. Their findings, published online in the journal, Molecular Ecology, reveal that the negative effects of poaching persist for decades after the killing has ended.

“Our study shows that it takes a long time – upwards of 20 years – for a family who has lost its kin to rebuild,” said lead researcher Kathleen Gobush, Ph.D., a research ecologist for the National Oceanic and Atmospheric Agency and a former doctoral student at the University of Washington Center for Conservation Biology.

African elephants rely heavily on matriarchs to lead groups and keep families together. Before the 1989 ban on ivory trade, nearly 75 percent of all elephants in Tanzania’s Mikumi National Park were killed. Poachers targeted those with the largest tusks – particularly older matriarchs. “A lot of these females lost their sisters and mothers, and were left living a solitary existence,” said Sam Wasser, Ph.D., director of the Center for Conservation Biology at the University of Washington. “So the question became, what are the long-term impacts on the genetic relatedness of groups?”

In search of an answer, the scientists tracked more than 100 groups of elephants living in Mikumi National Park. They assessed the lasting effects of poaching on group size, relatedness, and social bonding by comparing information about each group with previous reports of protected populations.

The researchers found that elephants in Mikumi formed unusually small groups, with nearly a third of the females living alone. Interestingly, some of the elephants chose to forge new bonds with unrelated groups after their own kin had perished.

“When we saw the solitary females, we initially thought that some lucky elephants still had their families, while other elephants had lost it all,” Gobush said. “But we actually saw a flexibility in their behavior. Some elephants were able to find their way and create new bonds with unrelated female elephants, while others did not.”

The researchers say it is unclear how long the effects will persist, especially in light of the recent increase in illegal ivory trade. But one thing is certain: Poaching continues to introduce major disruptions in the African elephant’s family tree at a substantial cost.

“Elephants are very long-lived animals. They are extremely social, and there’s a tremendous amount of group integrity and competitive ability,” Wasser said. “It’s been nearly 20 years since the ivory ban and there are still incredibly persistent impacts of illegal culling on these populations.”

Finbar Galligan | alfa
Further information:
http://www3.interscience.wiley.com/journal/119878204/issue

More articles from Life Sciences:

nachricht Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery
20.01.2017 | GSI Helmholtzzentrum für Schwerionenforschung GmbH

nachricht Seeking structure with metagenome sequences
20.01.2017 | DOE/Joint Genome Institute

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>