Different Means to Make a Turtle Shell

A recent article from Science's news department provides the latest in the ongoing debate about how turtle shells form, pointing to the possibility of two different developmental pathways. In work published in July in Nature Communications and also presented at the 10th International Congress of Vertebrate Morphology in Spain, a group out of Japan’s RIKEN Center reported that the covering of soft-shell turtles comes from the internal skeleton, not from skin cells, as another prominent theory had proposed. This video shows the evolution of the turtle shell via the former developmental pathway.

[Video courtesy of RIKEN Center for Developmental Biology]

© 2013 American Association for the Advancement of Science. All Rights Reserved.

Learning From Captivity: Zoos Offer Insights on Conservation

Zoos have been instrumental in helping researchers develop management techniques and conservation strategies for threatened species around the world. However, raising wild populations in isolation remains a difficult task and the most effective conservation strategies tend to integrate approaches developed in zoos with those pioneered in the wild, according to Kent Redford and colleagues.

Read more about this research from the 30 November issue of Science here.

[Image courtesy of Ryan Hawk/Woodland Park Zoo; click the image for more information.]

© 2012 American Association for the Advancement of Science. All Rights Reserved.

© 2014 American Association for the Advancement of Science. All Rights Reserved.