Saturday, April 27, 2013

Obama's Syria caution shows Washington uncertainty

Secretary of State John Kerry and national intelligence advisers arrive on Capitol Hill in Washington, Friday, April 26, 2013, to update members of the House on Syria's alleged use of poisonous gas in its ongoing civil war. U.S. intelligence has concluded with "varying degrees of confidence," that the Syrian government has twice used chemical weapons in its fierce civil war, the White House and other top administration officials said Thursday. (AP Photo/J. Scott Applewhite)

Secretary of State John Kerry and national intelligence advisers arrive on Capitol Hill in Washington, Friday, April 26, 2013, to update members of the House on Syria's alleged use of poisonous gas in its ongoing civil war. U.S. intelligence has concluded with "varying degrees of confidence," that the Syrian government has twice used chemical weapons in its fierce civil war, the White House and other top administration officials said Thursday. (AP Photo/J. Scott Applewhite)

Secretary of State John Kerry and national intelligence advisers arrive on Capitol Hill in Washington, Friday, April 26, 2013, to update members of the House on Syria's alleged use of poisonous gas in its ongoing civil war. U.S. intelligence has concluded with "varying degrees of confidence," that the Syrian government has twice used chemical weapons in its fierce civil war, the White House and other top administration officials said Thursday. (AP Photo/J. Scott Applewhite)

House Minority Leader Nancy Pelosi of Calif. speaks to reporters on Capitol Hill in Washington, Friday, April 26, 2013, after a closed-door briefing by Secretary of State John Kerry and national intelligence advisers on Syria's alleged use of poisonous gas in its ongoing civil war. (AP Photo/J. Scott Applewhite)

House Intelligence Committee Chairman Rep. Mike Rogers, R-Mich., walks to a meeting on Capitol Hill in Washington, Friday, April 26, 2013, with Secretary of State John Kerry as he and national intelligence advisers came to the Capitol to update members of the House on Syria's alleged use of poisonous gas in its ongoing civil war. U.S. intelligence has concluded with "varying degrees of confidence," that the Syrian government has twice used chemical weapons in its fierce civil war, the White House and other top administration officials said Thursday. (AP Photo/J. Scott Applewhite)

White House press secretary Jay Carney briefs reporters at the White House in Washington, Friday, April 26, 2013. Carney began the briefing by answering a question regarding the conflict in Syria.(AP Photo/Charles Dharapak)

(AP) ? President Barack Obama's cautious response to Syria's likely use of chemical weapons reflects a lack of agreement in Washington over aggressive military intervention, but lawmakers in both parties fear that inaction could embolden not only Syrian President Bashar Assad but U.S. foes as well.

The White House cautiously acknowledged that the Syrian government has used chemical weapons, most likely the agent sarin, in the two-year civil war that has killed more than 70,000 people and displaced hundreds of thousands more.

Obama has declared that the Assad regime's use of chemical weapons would cross a "red line" for a major military response, but the administration made clear Friday that even a quick strike wasn't imminent as they try to corroborate the information.

White House spokesman Jay Carney said the prospect of the use of chemical weapons in Syria is "gravely serious," but he insisted the administration needed more evidence to bolster its intelligence assessments.

"This is not an airtight case," he said. "We do have some evidence, but we need to build on that."

Emerging from a closed-door briefing with Secretary of State John Kerry on Capitol Hill, House Republicans and Democrats expressed uncertainty about the appropriate next step as the Obama administration considers limited military options.

No lawmaker pressed for a U.S. military invasion after more than 10 years of war in Iraq and Afghanistan.

"It is such a muddled picture," said Rep. Hal Rogers, R-Ky., chairman of the House Appropriations Committee. "I think probably we should be asking the U.N. to be involved. I think perhaps that's in the making."

Rep. Dutch Ruppersberger of Maryland, the senior Democrat on the House intelligence committee, was among many lawmakers who called for a cautious approach to Syria even as they acknowledged the seriousness of the situation.

"We want to do everything we can to avoid putting boots on the ground," he told reporters. The U.S. should work with other countries to stabilize Syria and ensure its chemical weapons are kept out of the hands of terrorist groups, he said.

"I don't think that we, just as the United States, want to go in to another war," Ruppersberger said.

Obama's vow that Syria's use of chemical weapons would elicit a strong response and the administration's latest caution raise questions about Obama's definition of a red line. The U.S. credibility and international authority are on the line in the administration's handling of Syria, and the message it sends to Assad and rogue nations such as North Korea and Iran.

"There's no question that when the United States takes a position that this crosses a line that our failure to respond has implications," said Rep. David Cicilline, D-R.I., a member of the House Foreign Affairs Committee. "I think the president was saying the use of chemical weapons is a game changer. I think most people agree with that. So that if we in fact determine that chemical weapons were used, I think the expectation is that we and the coalition and others take some action."

Rep. John Mica, R-Fla., wondered whether the red line is "turning into a pink line."

In Syria, officials rejected the U.S. intelligence assessment and denied that it had used chemical weapons.

Pressed on the response, State Department spokesman Patrick Ventrell said: "If the regime has nothing to hide they should let the U.N. investigators in immediately so we can get to the bottom of this."

The White House faces a limited choice of military options to help the rebels oust Assad.

Arming the rebels runs smack into the reality that a military group fighting alongside them has pledged allegiance to al-Qaida. Establishing a no-fly zone poses a significant challenge, as Syria possesses an air defense system far more robust than what the U.S. and its allies overwhelmed in Libya two years ago.

The next move on Syria was high on the agenda for Obama's meeting Friday with King Abdullah II of Jordan, as the U.S. ally has struggled with the influx of hundreds of thousands of refugees escaping the Syrian violence. Vice President Joe Biden and Abdullah discussed the best path to "a peaceful, democratic post-Assad Syria where moderates are empowered" on Thursday.

"I think it's important for the administration to look for ways to up the military pressure on Assad," said Sen. Carl Levin, D-Mich., chairman of the Armed Services Committee.

One of the most powerful of the rebel groups in Syria is Jabhat al-Nusra, which recently declared its affiliation with al-Qaida. Last December, the State Department designated the group a terrorist organization, and the administration's opposition to directly arming the Syrian opposition stems from concerns about the weapons ending up in the hands of Islamic extremists.

Arming the rebels, said Sen. Lindsey Graham, R-S.C., is a "lot harder that it was before."

"We've gotten to the point now where the opposition has been affected by the radicals," Graham said in an interview. "Right weapons in right hands is the goal. The second war is coming. I think we can arm the right people with the right weapons. There's a risk there, but the risk of letting this go and chemical weapons falling into radical Islamists' hands is the greatest risk."

Several lawmakers, including Sen. John McCain, R-Ariz., have called for the U.S. to create a narrow, safe zone inside Syria, along its border with Turkey.

Either a safe zone or a no-fly zone would require neutralizing Syria's air defenses. According to a report by the Institute for the Study of War, Syria's largely Soviet-era air defense system includes as many as 300 mobile surface-to-air missile systems and defense systems, and more than 600 static missile launchers and sites.

"You can establish it (safe zone) by taking out their aircraft on the ground with cruise missiles and using the Patriot (missile) also. No American manned aircraft in danger," McCain said.

The U.S. has taken only minimal military steps so far, limiting U.S. assistance to nonlethal aid, including military-style equipment such as body armor and night vision goggles.

The U.S. has deployed about 200 troops to Jordan to assist that country's military, and participated in NATO's placement of Patriot missile batteries in Turkey near the border to protect against an attack from Syria.

In testimony to Congress last week, Gen. Martin Dempsey, the chairman of the Joint Chiefs of Staff, was asked whether he was confident that U.S. forces could secure the chemical weapons caches within Syria.

"Not as I sit here today, simply because they've been moving it and the number of sites is quite numerous," Dempsey said.

___

Associated Press Intelligence Writer Kimberly Dozier and AP writer Richard Lardner contributed to this report.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/89ae8247abe8493fae24405546e9a1aa/Article_2013-04-26-US-US-Syria/id-cf583eaf34da4fb1accb8c10264b1002

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Friday, April 26, 2013

Miranda warning, then silence from bombing suspect

BOSTON (AP) ? Sixteen hours after investigators began interrogating him, the surviving suspect in the Boston Marathon bombings went silent: he'd just been read his constitutional rights.

Dzhokhar Tsarnaev immediately stopped talking after a magistrate judge and a representative from the U.S. Attorney's office entered his hospital room and gave him his Miranda warning, according to four officials of both political parties briefed on the interrogation. They insisted on anonymity because the briefing was private.

Before being advised of his rights, the 19-year-old suspect told authorities that his older brother, Tamerlan Tsarnaev, 26, only recently had recruited him to be part of the attack that detonated pressure-cooker bombs at the marathon finish line, two U.S. officials said.

The CIA, however, had named Tamerlan to a terrorist database 18 months ago, said officials close to the investigation who spoke to The Associated Press on condition of anonymity because they were not authorized to discuss the case with reporters.

The new disclosure that Tamerlan Tsarnaev was included within a huge, classified database of known and suspected terrorists before the attacks was expected to drive congressional inquiries in coming weeks about whether the Obama administration adequately investigated tips from Russia that Tsarnaev had posed a security threat.

Shortly after the bombings, U.S. officials said the intelligence community had no information about threats to the marathon before the April 15 explosions that killed three people and injured more than 260.

Tsarnaev died Friday in a police shootout hours before Dzhokhar was discovered hiding in a boat in a suburban back yard. He was wounded.

Washington is piecing together what happened and whether there were any unconnected dots buried in U.S. government files that, if connected, could have prevented the bombings.

Lawmakers who were briefed by the FBI said they have more questions than answers about the investigation of Tamerlan Tsarnaev. House Judiciary Chairman Bob Goodlatte, R-Va., said lawmakers intend to pursue whether there was a breakdown in information-sharing, though Rep. Adam Schiff, a California Democrat who sits on the House Intelligence Committee, said he "hasn't seen any red flags thus far."

U.S. officials were expected to brief the Senate on the investigation Thursday. That same day, the suspects' parents, Anzor Tsarnaev and Zubeidat Tsarnaeva, plan to fly to the U.S. from Russia, the father was quoted as telling the Russian state news agency RIA Novosti. The family has said it wants to take Tamerlan's body back to Russia.

It is unclear whether the issue of their younger son's constitutional rights will matter since the FBI say he confessed to a witness. U.S. officials also said Wednesday that physical evidence, including a 9 mm handgun and pieces of a remote-control device commonly used in toys, was recovered from the bombing scene.

But the debate over whether suspected terrorists should be read their Miranda rights has become a major sticking point in the debate over how best to fight terrorism. Many Republicans, in particular, believe Miranda warnings are designed to build court cases, and only hinder intelligence gathering.

Christina DiIorio Sterling, a spokeswoman for U.S. Attorney Carmen Ortiz, said in an email late Wednesday, "This remains an ongoing investigation and we don't have any further comment."

Investigators have said the brothers appeared to have been radicalized through jihadist materials on the Internet and have found no evidence tying them to a terrorist group.

U.S. investigators traveled to the predominantly Muslim province of Dagestan in Russia and were in contact with the brothers' parents, hoping to gain more information.

They are looking into whether Tamerlan, who spent six months in Russia's turbulent Caucasus region in 2012, was influenced by the religious extremists who have waged an insurgency against Russian forces in the area for years. The brothers have roots in Dagestan and neighboring Chechnya but had lived in the U.S. for about a decade.

Dzhokhar told the FBI that they were angry about the U.S. wars in Afghanistan and Iraq and the killing of Muslims there, officials said.

Dzhokhar's public defender had no comment on the matter Wednesday. His father has called him a "true angel," and an aunt has insisted he's not guilty.

Investigators have found pieces of remote-control equipment among the debris and were analyzing them, officials said. One official described the detonator as "close-controlled," meaning it had to be triggered within several blocks of the bombs.

That evidence could be key to the court case. And an FBI affidavit said one of the brothers told a carjacking victim during their getaway attempt, "Did you hear about the Boston explosion? I did that."

Officials also recovered a 9 mm handgun believed to have been used by Tamerlan from the site of an April 18 gunbattle that injured a Massachusetts Bay Transportation Authority officer, two U.S. officials said.

The officials told the AP that no gun was found in the boat where Dzhokhar was hiding. Boston police Commissioner Ed Davis said earlier that shots were fired from inside the boat.

Asked whether the suspect had a gun in the boat, Davis said, "I'm not going to talk about that."

But Kurt Schwartz, director of the Massachusetts Emergency Management Agency, said a police officer was shot within half a mile of where Tsarnaev was captured, "and I know who shot him."

Authorities had previously said Dzhokhar exchanged gunfire with them for more than an hour Friday night before they captured him inside a tarp-covered boat in a suburban Boston neighborhood backyard. But two U.S. officials said Wednesday that he was unarmed when captured, raising questions about the gunfire and how he was injured.

In other developments:

? Vice President Joe Biden condemned the bombing suspects as "two twisted, perverted, cowardly, knockoff jihadis" while speaking at a memorial service Wednesday for Sean Collier, a campus police officer at the Massachusetts Institute of Technology who was ambushed in his cruiser three days after the bombing. More than 4,000 mourners paid tribute to the officer.

? The Office of Health and Human Services in Massachusetts confirmed a Boston Herald report Wednesday that Tamerlan, his wife and toddler daughter had received welfare benefits up until last year, when he became ineligible based on family income. The state also says Tamerlan and his brother received welfare benefits as children through their parents while the family lived in Massachusetts.

? The area around the marathon finish line was reopened to the public.

____

Yost and Jakes reported from Washington. Associated Press writers Kimberly Dozier, Matt Apuzzo, Eileen Sullivan, Adam Goldman and Eric Tucker in Washington, David Crary, Denise Lavoie, Bridget Murphy and Bob Salsberg in Boston and Lynn Berry in Moscow contributed to this report.

Source: http://news.yahoo.com/miranda-warning-then-silence-bombing-suspect-081846142.html

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The Wanted's 'Rihanna' Song Gets Them Artist-On-Artist Action

The Wanted's new single may be called 'She Walks Like Rihanna,' which puts them in a pretty exclusive club.
By James Montgomery

Source: http://www.mtv.com/news/articles/1706348/the-wanted-walks-like-rihanna.jhtml

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Thursday, April 25, 2013

FreedomPop announces $40 hotspot with access to Sprint's 3G network

DNP  FreedomPop announces new hotspot with access to Sprint's 3G network

FreedomPop, the famously "free" data-only internet provider, promised an upgrade from WiMAX to Sprint's LTE by the end of 2013, and while the company may have missed that mark, it is now offering access to the carrier's 3G network. A new $40 Overdrive Pro hotspot, available today, will connect to Sprint's 3G in addition to 4G courtesy of Clearwire's WiMAX network. Users will get 500MB of 3G/4G coverage for free each month, and can choose a monthly 2GB plan for $20.

FreedomPop says it will release several devices running on Sprint's LTE spectrum later this year, in line with the carrier's build-out. Even the addition of Sprint's 3G is a big step up, though, as FreedomPop's own network doesn't exactly blanket the US. If you already own one of the company's hotspots but want to upgrade to this one, you'll be able to swap yours via customer service. Check out the full press info past the break.

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Source: FreedomPop

Source: http://feeds.engadget.com/~r/weblogsinc/engadget/~3/T1-KWqUKZ64/

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Autism risk spotted at birth in abnormal placentas

Apr. 25, 2013 ? Researchers at the Yale School of Medicine have figured out how to measure an infant's risk of developing autism by looking for abnormalities in his/her placenta at birth, allowing for earlier diagnosis and treatment for the developmental disorder. The findings are reported in the April 25 online issue of Biological Psychiatry.

One out of 50 children are diagnosed with an autism spectrum disorder in the United States each year, according to the Centers for Disease Control and Prevention (CDC), but the diagnosis is usually made when these children are 3 to 4 years of age or older. By then the best opportunities for intervention have been lost because the brain is most responsive to treatment in the first year of life.

Senior author Dr. Harvey Kliman, research scientist in the Department of Obstetrics, Gynecology & Reproductive Sciences at the Yale School of Medicine, and research collaborators at the MIND Institute at the University of California, Davis, have found that abnormal placental folds and abnormal cell growths called trophoblast inclusions are key markers to identify newborns who are at risk for autism.

Kliman and his team examined 117 placentas from infants of at-risk families, those with one or more previous children with autism. These families were participating in a study called Markers of Autism Risk in Babies -- Learning Early Signs. Kliman compared these at-risk placentas to 100 control placentas collected by the UC Davis researchers from the same geographic area.

The at-risk placentas had as many as 15 trophoblast inclusions, while none of the control placentas had more than two trophoblast inclusions. Kliman said a placenta with four or more trophoblast inclusions conservatively predicts an infant with a 96.7% probability of being at risk for autism.

Currently, the best early marker of autism risk is family history. Couples with a child with autism are nine times more likely to have another child with autism. Kliman said that when these at-risk families have subsequent children they could employ early intervention strategies to improve outcomes. "Regrettably couples without known genetic susceptibility must rely on identification of early signs or indicators that may not overtly manifest until the child's second or third year of life," said Kliman.

"I hope that diagnosing the risk of developing autism by examining the placenta at birth will become routine, and that the children who are shown to have increased numbers of trophoblast inclusions will have early interventions and an improved quality of life as a result of this test," Kliman added.

Other authors on the study include Kaitlin Anderson, Kristin Milano, and Saier Ye of Yale University; and Cheryl Walker, Daniel Tancredi, Isaac Pessah, and Irva Hertz-Picciotto of UC Davis.

This work was supported by the National Institutes of Health (1 P01 ES11269 and R01 ES 015359), the U.S. Environmental Protection Agency through the Science to Achieve Results (STAR) program (R829388 and R833292), the MIND Institute at the University of California, Davis, and the Yale University Reproductive and Placental Research Unit.

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The above story is reprinted from materials provided by Yale University. The original article was written by Karen N. Peart.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Cheryl K. Walkera, Kaitlin W. Andersong, Kristin M. Milanoh, Saier Yei, Daniel J. Tancredie, Isaac N. Pessahc, Irva Hertz-Picciottob, Harvey J. Klimang. Trophoblast Inclusions Are Significantly Increased in the Placentas of Children in Families at Risk for Autism. Biological Psychiatry, 2013 DOI: 10.1016/j.biopsych.2013.03.006

Note: If no author is given, the source is cited instead.

Disclaimer: This article is not intended to provide medical advice, diagnosis or treatment. Views expressed here do not necessarily reflect those of ScienceDaily or its staff.

Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_health/~3/7OtN05U-7iQ/130425091604.htm

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Fuel barges explode, causing large fire in Ala.

A massive explosion at 3 a.m. EDT on one of the two barges still ablaze in the Mobile River in Mobile, Ala., on Thursday, April 25, 2013. Three people were injured in the blast. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo John David Mercer) Three people were hospitalized with burns. Information on their conditions was not immediately available.

A massive explosion at 3 a.m. EDT on one of the two barges still ablaze in the Mobile River in Mobile, Ala., on Thursday, April 25, 2013. Three people were injured in the blast. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo John David Mercer) Three people were hospitalized with burns. Information on their conditions was not immediately available.

A massive explosion at 3a.m. EDT on one of the two barges still ablaze in the Mobile River in Mobile, Ala., on Thursday, April 25, 2013. Three people were injured in the blast. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo John David Mercer) Three people were hospitalized with burns. Information on their conditions was not immediately available.

Fire burns aboard two fuel barges along Mobile River after explosions sent three workers to the hospital. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo/Press Register, Glenn Baeske)

A massive explosion at 3 a.m. EDT on one of the two barges still ablaze in the Mobile River in Mobile, Ala., on Thursday, April 25, 2013. Three people were injured in the blast. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo John David Mercer) Three people were hospitalized with burns. Information on their conditions was not immediately available.

Fire burns aboard two fuel barges along the Mobile River after explosions sent three workers to the hospital Wednesday April 24, 2013. Fire officials have pulled units back from fighting the fire due to the explosions and no immediate threat to lives. (AP Photo John David Mercer)

(AP) ? A large fire that began with explosions aboard two fuel barges in Mobile, Ala., was rocked by a seventh explosion early Thursday and fire officials said they planned to let the fire, which has injured three, burn overnight.

Firefighters from Mobile and U.S. Coast Guard officials responded after 8:30 p.m. CDT Wednesday to a pair of explosions involving the gas barges in an area of the Mobile River east of downtown, authorities said.

As they were responding, a third explosion occurred around 9:30 p.m., Mobile Fire and Rescue spokesman Steve Huffman wrote in an email to The Associated Press. Additional explosions followed over the next few hours.

The Coast Guard said early Thursday that a one-nautical-mile safety zone had been established around one barge, which it said was "at the dock for cleaning."

Authorities said three people were transported to University of South Alabama Medical Center after suffering burn-related injuries. Huffman identified them as workers with Oil Recovery Co. The three were in critical condition early Thursday, according to hospital nursing administrator Danny Whatley.

Across the river, the Carnival Triumph, the cruise ship that became disabled in the Gulf of Mexico last February before it was towed to Mobile's port, was evacuated, said Alan Waugh, who lives at the Fort Conde Inn in downtown Mobile, across the river from the scene of the explosions. Waugh saw the blasts and said throngs of Carnival employees and others were clustered on streets leading toward the river as authorities evacuated the shipyard.

"It literally sounded like bombs going off around. The sky just lit up in orange and red," he said, "We could smell something in the air, we didn't know if it was gas or smoke." Waugh said he could feel the heat from the explosion and when he came back inside, his partner noticed he had what appeared to be black soot on his face.

U.S. Coast Guard Petty Officer Carlos Vega said the initial blast took place in a ship channel near the George C. Wallace Tunnel ? which carries traffic from Interstate 10 under the Mobile River. The river runs south past Mobile and into Mobile Bay, which in turn flows into the Gulf of Mexico.

Video from WALA-TV (http://bit.ly/15NEYJl) showed flames engulfing a large section of the barge, and a video that a bystander sent to AL.com (http://bit.ly/13vWz4G) showed the fiery explosions and billowing smoke over the river.

The cause of the explosion was not immediately clear, Huffman and Vega said.

"Once (the fire) is out and safe, a full investigation will take place," Huffman wrote.

Mobile Fire Chief Steve Dean told AL.com he was confident the fire wouldn't spread to nearby industrial properties, including the shipyard where the Carnival cruise ship is docked.

Huffman said the ship is directly across the river from the incident ? about two football fields in length.

The barges are owned by Houston-based Kirby Inland Marine, company spokesman Greg Beuerman said. He said the barges were empty and being cleaned at the Oil Recovery Co. facility when the incident began. He said the barges had been carrying a liquid called natural gasoline ? which he said is neither liquefied natural gas or natural gas. He said the company has dispatched a team to work with investigators to determine what caused the fire.

The explosion comes two months after the 900-foot-long Carnival Triumph was towed to Mobile after becoming disabled on the Gulf during a cruise by an engine room fire, leaving thousands of passengers to endure cold food, unsanitary conditions and power outages for several days. The ship is still undergoing repairs there, with many workers living on board.

Carnival didn't immediately respond to an emailed request for comment late Wednesday.

Earlier this month, the cruise ship was dislodged from its mooring by a windstorm that also caused, in a separate incident, two shipyard workers to fall into Mobile Bay. While one worker was rescued, the other's body was pulled from the water more than a week later.

___

Associated Press writer Phillip Lucas in Atlanta contributed to this report.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/3d281c11a96b4ad082fe88aa0db04305/Article_2013-04-25-Fuel%20Barge%20Explosion/id-bf82fcba3c8140cba71e2adeabb912ba

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Discovered: A mammal and bug food co-op in the High Arctic

Discovered: A mammal and bug food co-op in the High Arctic [ Back to EurekAlert! ] Public release date: 24-Apr-2013
[ | E-mail | Share Share ]

Contact: Brian Murphy
brian.murphy@ualberta.ca
780-492-6041
University of Alberta

University of Alberta researchers were certainly surprised when they discovered the unusual response of pikas to patches of vegetation that had previously been grazed on by caterpillars from a species normally found in the high Arctic.

U of A biology researcher Isabel C. Barrio analyzed how two herbivores, caterpillars and pikas, competed for scarce vegetation in alpine areas of the southwest Yukon. The caterpillars come out of their winter cocoons and start consuming vegetation soon after the snow melts in June. Weeks later, the pika starts gathering and storing food in its winter den. For the experiment, Barrio altered the numbers of caterpillars grazing on small plots of land surrounding pika dens.

"What we found was that the pikas preferred the patches first grazed on by caterpillars," said Barrio. "We think the caterpillar's waste acted as a natural fertilizer, making the vegetation richer and more attractive to the pika."

U of A biology professor David Hik, who supervised the research, says the results are the opposite of what the team expected to find.

"Normally you'd expect that increased grazing by the caterpillars would have a negative effect on the pika," said Hik. "But the very territorial little pika actually preferred the vegetation first consumed by the caterpillars."

The researchers say it's highly unusual that two distant herbivore speciesan insect in its larval stage and a mammalreact positively to one another when it comes to the all-consuming survival issue of finding food.

These caterpillars stay in their crawling larval stage for up to 14 years, sheltering in a cocoon during the long winters before finally becoming Arctic woolly bear moths for the final 24 hours of their lives.

The pika does not hibernate and gathers a food supply in its den. Its food-gathering territory surrounds the den and covers an area of around 700 square metres.

The researchers say they'll continue their work on the caterpillarpika relationship to explore the long-term implications for increased insect populations and competition for scarce food resources in northern mountain environments.

Barrio was the lead author on the collaborative research project, which was published April 24 in the journal Biology Letters.

###

For a research photograph please contact Brian Murphy.


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Discovered: A mammal and bug food co-op in the High Arctic [ Back to EurekAlert! ] Public release date: 24-Apr-2013
[ | E-mail | Share Share ]

Contact: Brian Murphy
brian.murphy@ualberta.ca
780-492-6041
University of Alberta

University of Alberta researchers were certainly surprised when they discovered the unusual response of pikas to patches of vegetation that had previously been grazed on by caterpillars from a species normally found in the high Arctic.

U of A biology researcher Isabel C. Barrio analyzed how two herbivores, caterpillars and pikas, competed for scarce vegetation in alpine areas of the southwest Yukon. The caterpillars come out of their winter cocoons and start consuming vegetation soon after the snow melts in June. Weeks later, the pika starts gathering and storing food in its winter den. For the experiment, Barrio altered the numbers of caterpillars grazing on small plots of land surrounding pika dens.

"What we found was that the pikas preferred the patches first grazed on by caterpillars," said Barrio. "We think the caterpillar's waste acted as a natural fertilizer, making the vegetation richer and more attractive to the pika."

U of A biology professor David Hik, who supervised the research, says the results are the opposite of what the team expected to find.

"Normally you'd expect that increased grazing by the caterpillars would have a negative effect on the pika," said Hik. "But the very territorial little pika actually preferred the vegetation first consumed by the caterpillars."

The researchers say it's highly unusual that two distant herbivore speciesan insect in its larval stage and a mammalreact positively to one another when it comes to the all-consuming survival issue of finding food.

These caterpillars stay in their crawling larval stage for up to 14 years, sheltering in a cocoon during the long winters before finally becoming Arctic woolly bear moths for the final 24 hours of their lives.

The pika does not hibernate and gathers a food supply in its den. Its food-gathering territory surrounds the den and covers an area of around 700 square metres.

The researchers say they'll continue their work on the caterpillarpika relationship to explore the long-term implications for increased insect populations and competition for scarce food resources in northern mountain environments.

Barrio was the lead author on the collaborative research project, which was published April 24 in the journal Biology Letters.

###

For a research photograph please contact Brian Murphy.


[ Back to EurekAlert! ] [ | E-mail | Share Share ]

?


AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.


Source: http://www.eurekalert.org/pub_releases/2013-04/uoa-dam042413.php

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