Scientists seek citizens' help in first-ever census of Weddell seals

April 14, 2017, University of Minnesota
Weddell seals are one of Antarctica’s iconic species. By counting seals on satellite imagery, scientists hope to learn how fishing and climate change in Antarctica is affecting the number of seals and the entire ecosystem over time. Credit: Michelle LaRue, Kim Goetz

Scientists are asking for the public's help to look through thousands of satellite images of Antarctica in the first-ever, comprehensive count of Weddell seals. Documenting the seals' population trends over time will help scientists better understand the effects of climate change and commercial fishing in the Antarctic.

Last summer, the researchers completed a successful pilot program with help from more than 5,000 volunteers who counted seals from satellite images of sea ice in the Ross Sea. The team is now ready to expand the project to the entire continent.

"Right now, everything we know about Weddell seals is limited to an area representing about one percent of the coastline around Antarctica," said Michelle LaRue, a research ecologist in the University of Minnesota's Department of Earth Sciences and lead researcher on the project. "Now we need help from the public to search the remaining 99 percent so we can better understand where seals live and why."

Weddell seals are important to the Southern Ocean ecosystem and have been studied since the early 1960s. However, no one has been able to do a comprehensive count of the seals due to the harsh Antarctic weather and remote locations in which the seals live. Now, high-resolution satellite images provide a solution—counting seals on —but there are too many images for scientists to handle alone.

Here is an example of an image with some seals on it. All the seals we can see in this picture are circled in red. Don’t be fooled by shadows—check (by zooming) if the dark spot is really a shadow from a chunk of ice or a small melt pool. Credit: DigitalGlobe
"There's really no other way to do a count of Weddell seals like this," LaRue said. "Even though our team includes seasoned researchers and know how to count seals on the images, it would take years for our small team to search all the images. These types of projects also expand education on important wildlife species. We have engagement from classrooms nationwide in our research."

Weddell seals are one of Antarctica's most iconic species. In addition to being undeniably charismatic, they are the southern-most mammal in the world, can live up to 30 years, and are perfectly adapted to living in some of the harshest conditions on the planet. They are seasonal occupants of the coastal sea ice that surrounds Antarctica. By counting seals on satellite imagery, scientists hope to learn more about and how fishing in Antarctic may be affecting the number of seals and the entire ecosystem over time.

This research is funded by the National Science Foundation and is a joint effort of the University of Minnesota, University of Colorado at Boulder, H.T. Harvey & Associates Ecological Consultants, Point Blue Conservation Science, Tomnod, and DigitalGlobe.

In addition to LaRue, the research team includes David Ainley, HT Harvey and Associates; Sharon Stammerjohn, University of Colorado at Boulder; Leo Salas, Point Blue Conservation Science; and Kostas Stamatiou and Jon Saints, Tomnod.

This image includes descriptions of what you can see in the image. There is an iceberg, from which a crack extends. Each of the red circles is a Weddell seal and appears somewhat teardrop in shape. Credit: DigitalGlobe

Explore further: Count seals in Antarctica from the comfort of your couch

More information: To start counting seals, visit the Tomnod website:

Related Stories

Count seals in Antarctica from the comfort of your couch

July 26, 2016

Scientists are asking the public to look through thousands of satellite images of Antarctica to assist in the first-ever, comprehensive count of Weddell seals. Counting seals will help scientists better protect and conserve ...

Mummified seals reveal ecological impact of ice change

October 22, 2015

Scientists are using the mummified remains of seals freeze-dried in Antarctica to examine the long-term effects of changing ice patterns on marine mammal ecology. Recent work, presented this week at the Society of Vertebrate ...

Recommended for you

The powerful meteor that no one saw (except satellites)

March 19, 2019

At precisely 11:48 am on December 18, 2018, a large space rock heading straight for Earth at a speed of 19 miles per second exploded into a vast ball of fire as it entered the atmosphere, 15.9 miles above the Bering Sea.

Revealing the rules behind virus scaffold construction

March 19, 2019

A team of researchers including Northwestern Engineering faculty has expanded the understanding of how virus shells self-assemble, an important step toward developing techniques that use viruses as vehicles to deliver targeted ...

Nanoscale Lamb wave-driven motors in nonliquid environments

March 19, 2019

Light driven movement is challenging in nonliquid environments as micro-sized objects can experience strong dry adhesion to contact surfaces and resist movement. In a recent study, Jinsheng Lu and co-workers at the College ...

Levitating objects with light

March 19, 2019

Researchers at Caltech have designed a way to levitate and propel objects using only light, by creating specific nanoscale patterning on the objects' surfaces.


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.