Nav: Home

Insights on whale shark populations and evidence for their historic rise and recent decline

August 04, 2014

In the largest study on the genetics of whale sharks conducted to date, researchers found that the world's biggest fish likely exist in 2 distinct populations with minimal connectivity between the Indo-Pacific and the Atlantic Ocean. The findings suggest that mixing of whale sharks between the Indian and Atlantic was and is rare.

The Molecular Ecology investigators also found a significant and likely recent population expansion, but a very recent bottleneck might have gone undetected as genetic diversity at Ningaloo Reef in Australia has declined during 5 consecutive recent years.

In the future, genetic analyses can greatly increase researchers' still very limited understanding of whale shark ecology and the status of what appears for now to be at least 2 populations.

-end-



Wiley
Improve evolution education by teaching genetics first
Evolution is a difficult concept for many students at all levels, however, a study publishing on May 23 in the open access journal PLOS Biology has demonstrated a simple cost-free way to significantly improve students' understanding of evolution at the secondary level: teach genetics before you teach them evolution.
Study unravels the genetics of childhood 'overgrowth'
Researchers have undertaken the world's largest genetic study of childhood overgrowth syndromes -- providing new insights into their causes, and new recommendations for genetic testing.
Could genetics influence what we like to eat?
Gene variants could affect food preferences in healthy people, according to a new study.
Reverse genetics for rotavirus
Osaka University scientists generate a new plasmid-based reverse genetics system for rotaviruses.
The genetics behind being Not Like Daddy
A common strategy to create high-yielding plants is hybrid breeding.
Understanding the genetics of human height
A large-scale international study involving more than 300 researchers, published today in Nature, heralds the discovery of 83 genetic variations controlling human height.
Animal genetics: The bovine heritage of the yak
Though placid enough to be managed by humans, yaks are robust enough to survive at 4,000 meters altitude.
New genetics clues into motor neuron disease
Researchers at the University of Queensland have contributed to the discovery of three new genes which increase the risk of motor neuron disease, opening the door for targeted treatments.
Your best diet might depend on your genetics
If you've ever seen a friend have good results from a diet but then not been able to match those results yourself, you may not be surprised by new findings in mice that show that diet response is highly individualized.
Using precision-genetics in pigs to beat cancer
Because of their similarities to people, using new technology in pigs turn up as a valuable alternative to rodent models of cancer.

Best Science Podcasts 2017

We have hand picked the best science podcasts for 2017. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.

Now Playing: Radiolab

Truth Trolls
Today, a third story of folks relentlessly searching for the truth. But this time, the truth seekers are an unlikely bunch... internet trolls.


Now Playing: TED Radio Hour

Rethinking School
For most of modern history, humans have placed smaller humans in institutions called schools. But what parts of this model still work? And what must change? This hour, TED speakers rethink education.TED speakers include teacher Tyler DeWitt, social entrepreneur Sal Khan, international education expert Andreas Schleicher, and educator Linda Cliatt-Wayman.