Blog Tags: Dolphins
Today’s Oil Spill Quote of the Day features Elizabeth Griffin Wilson, one of our very own scientists:
From yesterday’s Guardian:
Some 1,020 sea turtles were caught up in the spill, according to figures (pdf) today – an ominous number for an endangered species. Wildlife officials collected 177 sea turtles last week – more than in the first two months of the spill and a sizeable share of the 1,020 captured since the spill began more than three months ago. Some 517 of that total number were dead and 440 were covered in oil, according to figures maintained the Deepwater Horizon response team.
While oil-covered birds have become an emblematic image of catastrophic oil spills, sea birds aren’t the only ones affected. Oil is extremely toxic to all wildlife, and the toxic effects on marine life begins as soon as the oil hits the water.
Here are 10 examples of how marine life may be affected by the Gulf spill in the coming days, weeks and years
Happy February Friday!
Things will be quiet around here next week as we head to Pennsylvania for Oceana's annual international all-staff meeting. Hopefully these links will tide you over until then:
This week in ocean news,
...Slow and steady wins the carbon footprint race. Danish shipping giant Maersk cut its cruising speed in half the last two years, which cut greenhouse gas emissions and fuel consumption as much as 30 percent. If global shipping were a country, it would be the sixth largest producer of greenhouse gas emissions.
...After being removed from the endangered list in November, the brown pelican’s recovery has hit a speed bump. Hundreds of pelicans have been found dead from a mysterious ailment that could be caused by ocean pollution or runoff.
...Miriam presented this month’s Carnival of the Blue in singable couplets. 'Nuff said.
...In case you didn’t know, the Mariana Trench is really, really, really deep. And humans, by extension, are really small. Have a look at this scale illustration.
Bats and toothed whales share the ability to squeak and click their way to prey. And now two new studies in this week’s journal Current Biology reveal that their echolocation, which evolved independently in the two groups, has a similar underlying molecular mechanism.
There are plenty of examples of evolutionary convergence, such as the tusks of elephants and walruses, or the bioluminescence of fireflies and jellyfish.
But it’s highly unusual for convergence to occur at the molecular level. Turns out the inner ear hair cells of both the bottlenose dolphin (a toothed whale) and 10 species of bats contain a protein called prestin, which plays an important role in echolocation.
But not all echolocaters are created equal. Because the speed of sound in water is five times that in air, dolphins can use echolocation for more than 100 meters. Bats can only do so for a few meters.
(Hat tip to Monterey Bay’s Sea Notes blog for this story.)
Have you ever tried to gift wrap a shark? Put a bow on a polar bear? Wrangle a penguin into a gift box? Thankfully, you don’t have to actually wrap up an animal to give an Oceana gift. I’m so excited to tell you that the Oceana Adoption Center is open for business!
All the familiar creatures are back this year - sharks, sea turtles, octopuses, polar bears, penguins, seals, dolphins and whales - and we've made a special addition too. We are now offering The Casey Kit, a deluxe limited-edition sea turtle adoption inspired by Casey Sokolovic, a young ocean hero who has been baking and selling cookies to support the rescue and rehabilitation of sea turtles.
Until wrapping paper comes in rolls large enough for a hammerhead, Oceana’s adoptions are the best way to give the ocean-lovers on your list the perfect holiday present. Make sure to order before December 15 to get free holiday shipping. Your tax-deductible donation is not only a thoughtful gift to a lucky friend or family member, but it helps us here at Oceana do our work – protecting the oceans all over the world.
In a big victory for our colleagues in Europe, yesterday the EU Court of Justice found Italy in violation of EU law for the country's continued use of driftnets, a fishing gear banned since 2002.
Driftnets, which float freely, sometimes for miles, are a serious threat to cetaceans, sea turtles, sharks and fish in the Mediterranean. Hundreds of thousands of whales and dolphins are killed each year by driftnets.
The day before the decision, Oceana presented its latest report on the use of driftnets in the Mediterranean and stressed that the Court's judgment was an essential step in eradicating the use of the fishing gear.
The Oceana report contains photographs from 2008 of 92 vessels with driftnets on board, 80 percent had already been identified during campaigns in previous years.
Xavier Pastor, Executive Director of Oceana Europe, said, “The judgment is an important milestone in the elimination of driftnets from the Mediterranean. At last we may be moving towards the end of this illegal fishing gear, seven years after the EU banned their use."
Over several years of campaigning in the Mediterranean, Oceana has documented and reported how driftnets, despite the ban, continue to be used, not only in Italy, but also in other areas of the Mediterranean such as Morocco, Turkey, and until recently, France.
Congratulations, Xavier and team!
Happy Friday, all! This week in ocean news, ...The New York Times described the threats facing sea turtles who nest on Miami's popular beaches. ...New research indicates that because killer whales in the Puget Sound must raise their voices to be heard over the din of boats, they may be exhausting themselves as they try to find food. ...Thanks to the loss of Arctic sea ice, two German ships are poised to become the first to go from Asia to Europe in the Arctic waters north of Russia.
As promised, I'll be bringing you regular updates from the Ranger expedition to the Canary Islands. Here's one from last weekend. -Emily Almerimar-Chipiona Voyage. Saturday, August 15, 2009 By Silvia Garcia Sunny, calm during the morning, and strong gusts of wind in the Strait. Last night we left Almerimar bound for Chipiona which will take us about 30 hours of sailing. Going through the Strait has entailed sailing with the sails up because of the gusts of wind we have come across after coming from a completely calm Alboran Sea. Of course, in the Strait, we have sighted numerous cetaceans, normally family groups, of both long-finned pilot whales and common dolphins and striped dolphins; a mixed group of common and striped dolphins swam alongside the ship’s bow for quite awhile. On several occasions there were some babies and juveniles in these groups. We also came across a huge ocean sunfish (Mola mola) sunning, and a good-sized patch of sargasso (Sargassum vulgare) adrift, uprooted from the ocean bottom by a storm or aggressive fishing gear.
A few weeks ago, I wrote about research that suggests whales and dolphins have cultures the same way humans do. A recent article in the Smithsonian Magazine points to similarities in the brains of social animals -- whales, great apes, and yes, humans -- that might explain the ability to work within social structures. Combining lab research with fieldwork and medical studies, scientists have discovered that the presence of von Economo neurons signifies ability to successfully communicate with others. Elephants and whales, like humans, operate in elaborate societies, quickly adapting to changing situations, such as rescuing an abandoned calf. The absence or destruction of these neurons, as in the case with certain neurological diseases, leads to a break down in social skills and adaptability.
Do me a favor and try this: stay where you are and click your tongue against the roof of your mouth. Now walk somewhere else, and click your tongue again. Can you hear a difference? Congratulations, you’re on your way to learning how to echolocate! Whales and dolphins use echolocation to navigate and locate objects in the dark ocean. According to acoustic experts in Spain, people can use tongue clicks to “see” things by listening to the way the noise reverberates off its surroundings. All you have to do is recognize changes in your tongue clicks based on what is around you. Apparently, two hours per day for a couple of weeks is enough to determine if something is in front of you, and it takes a couple more weeks to differentiate between a tree and pavement. The most ideal sound is the “palate click” where you place the tip of your tongue on the roof of your mouth just behind your teeth and quickly move your tongue backwards.
- Creature Feature: Atlantic Puffin Posted Fri, December 6, 2013
- Creature Feature: Polar Bear Posted Mon, December 9, 2013
- Support Renewable Energy - Opinion in Florida's Sun Sentinel Posted Tue, December 3, 2013
- Creature Feature: Clownfish Posted Wed, December 4, 2013
- CEO Note: Conservation Needs Strong International Trade Laws Posted Thu, December 5, 2013