Many dams have fish ladders that help the fish safely make their journey upstream. But getting downstream is a whole different story. Hydroelectric dams, in particular, present a huge challenge. Between strong currents, rapidly changing water pressure, and huge turbines, the young fish can get stunned, injured, or killed. Although there are various methods in place to keep the fish away from the turbines, many still end up going through the the engines.
As many hydroelectric dams built during and before the 1970s are currently due for relicensing, their environmental impact is being assessed. And one of the key indicators of a dam’s environmental impact is how well fish fare when they encounter one. Collecting precise data was nearly impossible until the invention of a nifty device. Read more…
The Zoological Society of London mines the gap.I am always impressed with the imaginative ways the Zoological Society of London uses technology to try to protect and conserve endangered species. Here’s their latest brainstorm, as described on the ZSL website:
“ZSL and Google are working together to pilot the use of TV whitespaces (TVWS) – unused channels in the broadcast TV spectrum – at ZSL London Zoo. The trial aims to show how TVWS can be used to provide wireless connectivity over a large area and in non-line-of-sight scenarios. This exciting technology has huge potential to deliver fast internet to ZSL’s remote conservation sites and help monitor wildlife globally.
The pilot consists of cameras and TVWS radios installed at the otter, meerkat and Galapagos tortoise enclosures within the Zoo. Live footage from each enclosure is transmitted using TVWS technology to a base station and then streamed live onto ZSL’s YouTube channel. Members of the public can tune in to the live feeds and watch the animals anytime, anywhere.
To ensure there is no interference with licensed spectrum holders, Google’s spectrum database is being used to identify available whitespace.
This trial is the first step in understanding how ZSL can effectively use TVWS to support its field conservation projects. A particular area of interest is integrating TVWS into ZSL’s Instant Wild remote surveillance system to enhance data transmission range. ”
The YouTube streams started on October 9th, and will be live for two months.
Back in the 1970s, a lot of cars sported “Save the Whales” bumper stickers. More than 2 million whales were caught by commercial whalers in the 20th century, and by the middle of the century, many populations were severely depleted. The “Save the Whales” campaign brought millions of people together, resulting in a near-worldwide ban on commercial whaling in 1986. Today, many fewer whales are being taken, but there are still many threats to their survival, including commercial marine traffic.
Big ships run into whales. Inadvertently, of course, but because today’s shipping lanes overlap with whale feeding and migration areas, whales (many of them endangered species) are at great risk of being injured or killed. Obviously, the best way to save the whales is to avoid running into them—and commercial ships now have some free tools that make that possible.
There’s an app for that.
For the past two years, mariners along the U.S. East Coast have been able to download a free iPad and iPhone app that warns them when they enter areas with a high risk of collision with critically endangered North Atlantic right whales. Whale Alert provides a central source for information about how to navigate around right whales in specific areas, along with the latest data about their whereabouts, all overlaid on NOAA digital charts. Read more…
A WWF International Smart Gear Competition to reduce bycatch
By some estimates, fishing bycatch—which includes unwanted dolphins, turtles, whales, and birds—snared by gillnets, longlines, and trawlers makes up 40% of the catch today.
The 2014 International Smart Gear Competition seeks innovative, environmentally friendly ways to reduce the amount of fisheries bycatch. The recurring contest is sponsored by the WWF, and has resulted in some really clever solutions (such as LED-equipped nets tuned to various wavelengths that repel specific species) that greatly reduce bycatch, conserving populations of marine mammals, turtles, fish, and other sea creatures.
Open to all, over the last few years the competition has attracted entries from all kinds of people who care about fishing— from gear technologists and fishermen to engineers and chemists. The judges panel includes fisheries experts, gear technologists, fishermen, scientists, researchers, and conservationists.
Deadline for entries for 2014 is August 31, but don’t let that stop you from coming up with new ideas. The contest is a recurring event—and this year’s prizes total $65,000.
An item from O’Reilly’s IoT+ Newsletter that caught my eye:
Two million human visitors share the Cape Hatteras National Seashore with endangered turtles. To protect the turtle nests and hatchlings during the hatching period the beaches must be closed—but because it’s difficult to gauge when exactly the baby turtles will hatch, the beach is closed for 6 weeks from the discovery of the nest.
Nerds Without Borders has created nest monitor devices with a microcontroller, accelerometer, thermometer, and communications system inside a ping-pong ball (which, conveniently, looks a lot like a turtle egg).
These sensors more accurately determine when hatching will take place—allowing the beaches to be closed for much shorter periods and giving researchers a heads up when hatching will happen. Duane Benson explains.
(And if you’re wondering where the baby turtles go after they hatch and head out to sea…)
About Nerds Without Borders
Nerds Without Borders is a network of thoughtful people working collaboratively to solve many of the world’s most pressing problems. They are looking for all sorts of people to help: Engineers, Scientists, Writers, Artists, Dreamers, Activists, Organizers, Fundraisers, Financiers, among others. You define the type of work you want to do, and how much time you can commit to a project. Learn more at http://nerdswithoutborders.net.
Solving the mystery of the “lost years”
Ever tried to track a baby sea turtle? It’s not easy. They hatch on the beach and immediately head out to sea to go—where?
For years, scientists have put forth various theories about where the baby turtles go on their maiden voyage, but there’s been no hard data. Until scientists came up with a lightweight tracking device, there was no way to follow the turtles’ movements from the time they hatched until they returned to the same beach years later to mate.
Now we have some data and new insights, thanks to Kate Mansfield, a marine biologist at the University of Central Florida, and a team of scientists from the UCF, Florida Atlantic University, University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, and University of Wisconsin. The team tracked 17 loggerhead turtles for 27 to 220 days in the open ocean, using small, solar-powered satellite tags. Read more…
A few months ago, just as the United Nations’ Intergovernmental Panel on Climate Change released a major report on climate change, I was in the middle of reading Elizabeth Kolbert’s recent book, The Sixth Extinction. The UN report scarily aligns with Kolbert’s location-specific observations about the apparently unstoppable environmental changes we homo sapiens are bringing about.
For many years, I’ve despaired as I read and watch reports about what we’re doing to the planet and to the other creatures that inhabit it with us. At times I’ve even fantasized that a good old-fashioned-yet-new-fangled plague might be the best thing that could happen. The good news (for me, anyway) is that Kolbert’s book has led me to think differently about the future of the Earth and its 7.2 billion people.