Thursday, December 22, 2011

International Man of Mystery: Kim Jong Il's Russian Roots and Travels (Time.com)

During the handful of visits that Kim Jong Il made to Russia throughout his life, he never once stopped by his birthplace, the dirt-road village of Vyatskoye in the Russian Far East. Frozen for much of the year and reduced now to a population of mostly geriatric farmers, the village lies a short train ride from Russia's border with North Korea, the hermit state Kim ruled for 17 years until his death this Saturday, Dec. 17. According to Soviet records, Kim was born there as Yury Irsenovich Kim, the son of a rank and file officer of the Red Army, Kim Il-Sung, whom Stalin later nominated to lead North Korea.

"When we were alone together, of course we talked about the place of his birth," says Konstantin Pulikovsky, the Kremlin's former envoy to the Far East, who would escort Kim during the visits he made to Russia on his armored train. "I told him a bit about it. I told him that his father's house is preserved and that many of the villagers remember him. He listened carefully and never denied a thing. But he asked me never to publicize it, and he never asked to go there," Pulikovsky tells TIME. (See photos: "Mourning the Dear Leader.")

Publicizing Kim's beginnings, especially with a visit from the North Korean tyrant himself, would risk shattering the lie that the Kim family has been telling its subjects for decades. As the official legend has it, Kim was born atop a sacred mountain in Japanese-occupied North Korea, under a double rainbow that rose to greet the infant Kim and a new star that began shining in the sky. "This was all hogwash, of course," says Pulikovsky. "It was meant for internal consumption, and we respected that."

The real story of Kim's birth, however, seemed to be at the root of the personal and political connection he always felt toward Russia, one of the few allies that North Korea kept through its decades of isolation. Kim's last foreign visit, which he made on his armored train this August, just a few months before his death, was to Siberia, where he met with Russian President Dmitri Medvedev. It was seen as Kim's latest effort to balance against China's influence by nuzzling up to Moscow, and at the time, Kim was also busy grooming his youngest son, Kim Jong Un, to succeed him. Many Russian officials expected Kim to bring his heir along to help ensure that the bond between the two countries would not be broken after Kim's death.

But he did not, and the future of that relationship, like so much of North Korea's future, is now up in the air. Pulikovsky, who formed a closer friendship with Kim than any other Russian official in modern times ("We are both Aquarius, so we would always call to say happy birthday and try to meet up."), only met Kim's youngest son once, during a holiday he took with his family to Pyongyang a few years ago. The older Kim introduced him as his heir, Pulikovsky recalls, "But the boy didn't say a word." (See "The Koreas: To Reunify or Not?")

Kim Jong Un's personality, and even his exact birth date, remains a mystery, while Korea watchers have harped on his reported love of American basketball to suggest that he might take a softer line than his father in relations with the West. But this is all guesswork so far, and experts in Moscow are convinced that the younger Kim will stick to Pyongyang's traditional older brothers, Russia and China. "North Korea simply has nowhere else to turn," says Alexander Lukin, the head of the East Asia department at the Russian Foreign Ministry's institute of diplomacy. "Economically it is totally dependent on China, because it doesn't really produce anything of its own," Lukin says. "And in the last years of his life, Kim Jong-Il did his best to cozy up to Russia more and more, mainly to show that his dependence on the Chinese is not so one-sided."

That is the double-game that North Korea will likely continue to play, because it is practically the only one the Kim family knows. Russia, for its part, seems ready to keep playing along. When news of Kim's death broke on Monday, the Kremlin sent its condolences to his heir, and on Tuesday, Russian Foreign Minister Sergei Lavrov visited the North Korean embassy in Moscow to pay his respects. (Tellingly, Russia extended no such gesture to the Czech Republic after that country's former president, Vaclav Havel, died on Sunday. In the late 1980s, Havel led Czechoslovakia's peaceful revolution against Soviet rule. His death did not warrant so much as a word on the Kremlin website.)

But it is far from clear what Russia has to gain from its doting relations with North Korea, which still owes Russia $11 billion in debt from the Soviet era. "In terms of trade, I know they import our celluloid visors to put on their military caps, which tells you something about their industrial relevance," says Georgy Kunadze, Russia's former ambassador to South Korea. "But the fact that we have a paranoid regime on our borders should not make us temper our assessment of North Korea," adds Kunadze, who led a Kremlin mission in 1993 to re-establish relations with Pyongyang after the fall of the Soviet Union. "We need to remember that North Korea has never made good on its agreements with Russia, has never consulted us before jumping into one of its adventures," including its testing of nuclear weapons in 2006 and 2009, or its decision to shell a South Korean island last year. (See TIME's Person of the Year: The Protester.)

So for Russia, North Korea remains almost as much of a nuisance as it is for the West, and in some ways an even more dangerous one, because a nuclear accident in North Korea would inevitably spill radiation onto Russian territory. Yet Moscow shows no sign of toughening its stance. It has long supported United Nations sanctions against North Korea's nuclear program, but has also gone out of its way to make the regime feel loved. In August, when Medvedev flew to Siberia to meet with Kim Jong Il, he again pledged to build a gas pipeline and a railroad to North Korea. The state news agency KCNA described their meeting as "overflowing with friendship." This allowed Pyongyang to send a familiar message to both China and the West: if you cross us, we still have a powerful ally in Moscow. As Pulikovsky recalls, this has long been Kim's favorite diplomatic trick.

Soon after U.S. President George W. Bush branded North Korea a member of the "axis of evil" in 2002, Kim travelled to Russia to meet with then President Vladimir Putin, and he asked Pulikovsky to do him a peculiar favor. "He told me, 'Konstantin, when the official meeting [with Putin] is over, I want to sit down with him in private for ten minutes, with no one in the room, not even interpreters. I need to tell him something." That evening, the private meeting was arranged, and as Pulikovsky escorted Kim back toward the border afterward, his curiosity got to him. "I asked him, 'Comrade Kim, if it's no secret, why did you need these ten minutes?'" Pulikovsky says. "And he smiled at me and said, 'What's the difference? The point is for Bush to wonder what we were talking about.' For me that was classic Kim. He always found some way to get snagged in your thoughts, to make himself into a mystery."

See rare pictures from inside North Korea.

See TIME's top 10 everything of 2011.

View this article on Time.com

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Source: http://us.rd.yahoo.com/dailynews/rss/nkorea/*http%3A//news.yahoo.com/s/time/20111221/wl_time/08599210291700

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Sunday, December 18, 2011

Kobe Bryant's wife files for divorce

FILE - In this Feb. 13, 2010, file photo, Los Angeles Lakers guard Kobe Bryant and his wife, Vanessa, attend the skills competition at the NBA basketball All-Star Saturday Night in Dallas. Vanessa Bryant filed for divorce from the Lakers star, Friday, Dec. 16, 2011, in Orange County Superior Court in Santa Ana, Calif., citing irreconcilable differences as the reason for the split. (AP Photo/LM Otero, File)

FILE - In this Feb. 13, 2010, file photo, Los Angeles Lakers guard Kobe Bryant and his wife, Vanessa, attend the skills competition at the NBA basketball All-Star Saturday Night in Dallas. Vanessa Bryant filed for divorce from the Lakers star, Friday, Dec. 16, 2011, in Orange County Superior Court in Santa Ana, Calif., citing irreconcilable differences as the reason for the split. (AP Photo/LM Otero, File)

ORANGE, Calif. (AP) ? Kobe Bryant's wife, who stood by her husband when he was charged with sexual assault in 2003, filed for divorce on Friday from the Los Angeles Lakers star, citing irreconcilable differences after a decade of marriage.

Vanessa Bryant signed the papers on Dec. 1. Kobe Bryant signed his response on Dec. 7 and it was filed Friday, according to the documents.

"The Bryants have resolved all issues incident to their divorce privately with the assistance of counsel and a judgment dissolving their marital status will be entered in 2012," according to a statement from a representative for the couple.

In the filing, Vanessa Bryant asked for joint legal and physical custody of the couple's two daughters, Natalia, 8, and Gianna, 5. Kobe Bryant asked for the same in his response. Vanessa Bryant also requested spousal support.

The Bryants "ask that in the interest of our young children and in light of the upcoming holiday season the public respect our privacy during this difficult time," according to the statement.

Bryant met his future wife in 1999 on a music video shoot when Vanessa Laine was 18 years old. Six months later, she and the then-21-year-old Bryant became engaged. They married on April 18, 2001.

The Bryants have been through trying times together.

Vanessa Bryant appeared at a news conference with her husband when he was charged with sexually assaulting a 19-year-old woman who worked at the exclusive Lodge & Spa at Cordillera near Vail, Colo., in 2003. She held his hand and stroked it tenderly as the NBA star admitted he was guilty of adultery ? but nothing else. Earlier she had issued her own statement to the media, vowing to stand by her husband.

"I know that my husband has made a mistake ? the mistake of adultery," she said in the statement at the time. "He and I will have to deal with that within our marriage, and we will do so. He is not a criminal."

A year later, prosecutors dropped the criminal charge against Kobe Bryant because the woman did not want to go ahead with a trial.

Last year, Kobe and Vanessa Bryant settled litigation with a former maid who accused the NBA star's wife of harassment. The Bryants countersued Maria Jimenez for violating a confidentiality agreement by talking to reporters about the family.

Associated Press

Source: http://hosted2.ap.org/APDEFAULT/3d281c11a96b4ad082fe88aa0db04305/Article_2011-12-16-BKN-Kobe-Bryant-Divorce/id-349663f59d7e4837a057c8a453d9a800

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Republican debate: Gingrich likens himself to Ronald Reagan

Thursday's Republican debate was the last before voters begin making their choices on January 3. ?Front-runner Newt Gingrich insisted he could beat Obama and likened himself to?Ronald Reagan.

Republican?front-runner Newt Gingrich likened himself to Ronald Reagan and insisted in a campaign?debate?Thursday night that he can defeat President Barack Obama in 2012, adding it was laughable for his rivals to challenge his conservative credentials.

Skip to next paragraph

Gingrich and former Massachusetts Gov. Mitt Romney ? who runs second to Gingrich in the polls in Iowa ? joined five other White House hopefuls on a?debate?stage for the last time before Iowa's Jan. 3 caucuses lead off the battle for the?Republican?presidential nomination.

The big question in the opening moments of a fast-paced two-hour?debate?went to the heart of a dilemma that could eventually settle the race ? do conservative?Republican?voters pick a candidate who best represents their party's views, or do they simply want the candidate who is best able to defeat the president?

Those voters begin making that choice on Jan. 3, and if experience is any guide, one or more of the presidential hopefuls on the?debate?stage will not make it out of the state to compete in the New Hampshire primary a week later.

Romney said his experience in private business made him the man to confront Obama in?debates?in 2012. "And I'll have credibility on the economy when he doesn't," he said.

The?Republican?primary winner faces Obama, whose favorable ratings have declined sharply, mostly because of his inability to unleash a strong economic recovery. Unemployment remains at a high 8.6 percent.

Gingrich, who seemed an also-ran in the earliest stages of the race, has emerged as a leader heading into the final stretch of the pre-primary campaign. He now leads the?Republicans?in the polls both in Iowa and nationally.

However, his conservative credentials were immediately challenged: Former Sen. Rick Santorum recalled that as House of Representatives speaker Gingrich had to contend with a "conservative revolution" from the ranks of?Republican?lawmakers.

Indeed, Gingrich is encumbered with a history of having left the House under a cloud of ethics complaints, and he has had three marriages and admitted marital infidelities.

Romney largely refrained from criticism of Gingrich, despite increasingly barbed attacks in day-to-day campaigning, including a characterization of the former speaker as "zany" for having endorsed mining the moon and lighting highways with mirrors in space.

Source: http://rss.csmonitor.com/~r/feeds/csm/~3/x0QkkcywgD0/Republican-debate-Gingrich-likens-himself-to-Ronald-Reagan

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Saturday, December 17, 2011

Witness: Picturing the sinking of the Soviet Union (Reuters)

The following story recalls the experiences of Reuters photographer Shamil Zhumatov when the leaders of the newly independent post-Soviet republics gathered in his home city of Alma-Ata in 1991. Zhumatov has been a Reuters photographer in ex-Soviet Central Asia for the last 17 years and has also covered wars in Afghanistan and Iraq. He lived the first 20 years of his life in the Soviet Union and the second 20 years as a citizen of Kazakhstan.

By Shamil Zhumatov

ALMATY (Reuters) - The Soviet Union, we had always thought, was surely too big to fail.

We had all seen the bare shelves in the shops. We knew that many constituent republics had declared their independence. But this was still my almighty Soviet Union, the only country this 20-year-old photojournalist from Kazakhstan had ever known.

So why had 10 national leaders rushed to my capital city, Alma-Ata, on December 21, 1991? Who were these hordes of journalists and photographers jostling for position and shouting questions?

It was one of my first assignments for the Kazakh Telegraph Agency. The night before, I sat in the agency's darkroom splicing 300-metre rolls of film and inserting it with great care into cartridges, 36 shots at a time.

We didn't work with factory-made rolls of film; this was the Soviet Union. Painstaking preparation was part of the job, especially before any major event.

And this was certainly major. Even my seasoned colleagues had had few opportunities to photograph national leaders. Party congresses, military parades, even New Year celebrations: these happened in Moscow, events we watched on television.

Less than two weeks earlier, the leaders of Russia, Ukraine and Belarus -- the Slavic core of the Soviet Union -- had signed the agreement that dissolved the country and created the Commonwealth of Independent States (CIS).

Although the alliance wasn't closed to other republics, when we in Central Asia heard of it, we felt cast off and betrayed. Shouldn't we also have a say in the fate of our country? The excitement and freedom of independence would come later; right now, we were frightened children clinging to the coat-tails of our parent.

WHAT IF?

Nursultan Nazarbayev, the president of newly independent Kazakhstan, mobilized quickly to ensure our country and a host of other newly independent republics were brought into the fold.

He met one leader after another at the snowbound airport as they arrived to sign the declaration that would bring the number of countries into the grouping to 11.

It seemed everyone who arrived was in a rush. Even now, when I edit my pictures, I can see the worry etched on the faces of the Kazakh statesmen of the time. What if someone were suddenly to change their mind, snatching away the security Moscow had always provided?

Two lonely protesters stood in the snow outside the hall where the signing would take place, holding posters decrying the end of the Soviet Union. "Shame on the Destroyers of the USSR!" said one. "Down with the CIS!"

Our shared Soviet heritage was all that bound us together. Even the name of the new alliance sounded strange. We could appreciate the idea of "independent states". But a "commonwealth"? Between a set of ethnically divergent countries, two of which -- Armenia and Azerbaijan -- were already engaged in a brutal conflict over Nagorno-Karabakh?

Inside, the grandiose ceremony had begun. Never before had I seen so many KGB officers gathered in one place. Its 9th Department, which was responsible for guarding dignitaries, had a lot of people to look out for.

And so many journalists! Some photographers had brought ladders to climb above the crowds -- a device I would use countless times over the next years, but something I'd never seen before that day.

Russian President Boris Yeltsin was the most charismatic of all the leaders present. His words -- and he spoke a lot -- were accompanied by animated hand gestures. People shouted questions at him on the move. For a photographer, he was a great subject.

Yeltsin's individual style contrasted sharply with that of the ranked officials around him. Even the Trilby he wore was at odds with the thick fur hats of other leaders.

After the signing ceremony, the leaders stood for a group photograph. One journalist shouted to Yeltsin: "How are you feeling?"

He grinned and gave the thumbs-up. With a single click of my mechanical Nikon F2, I realized that a new time was upon us. I was recording history.

STRANGE FILM

Before writing this article, I was scanning my old black-and-white negatives in a photo store in Almaty, as Alma-Ata is now called. The other customers were printing out pictures taken on their mobile phones.

"What a strange film! I can't even see any picture numbers along the perforations," said the curious sales assistant, too young to recall the 300-metre rolls with which I once worked.

At 40, I have now spent half of my life in the Soviet Union and half in independent Kazakhstan. The second two decades have brought changes unimaginable during the first.

The Soviet Union gave me much for which to be thankful: an education which could not be bettered today, and the well-built apartment blocks that my parents still call home.

But gone are the fear and uncertainty -- my own and Kazakhstan's -- I remember from that day in December 1991. They have been replaced by a maturity and an independence that comes from facing and overcoming your challenges.

We have both grown up.

(Writing by Robin Paxton; Editing by Sonya Hepinstall)

Source: http://us.rd.yahoo.com/dailynews/rss/asia/*http%3A//news.yahoo.com/s/nm/20111215/wl_nm/us_cis_kazakhstan

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Esophageal Cancer: Writer Christopher Hitchens Dies From Pneumonia Complication -- What Is Esophageal Cancer?

Influential -- yet controversial -- writer, journalist and atheist Christopher Hitchens passed away from pneumonia on Dec. 15, according to news reports. The pneumonia was a complication of esophageal cancer, which he was diagnosed with last June.

BBC News reported that Hitchens, 62, had documented his experience with his diagnosis and health in a column in Vanity Fair magazine in the time following his diagnosis.

"I sometimes wish I were suffering in a good cause, or risking my life for the good of others, instead of just being a gravely endangered patient," BBC News reported that he wrote in an August 2010 Vanity Fair essay.

Esophageal cancer occurs in the esophagus, the tube that carries food to the stomach. According to Everyday Health, pneumonia can be a complication of esophageal cancer "because a tumor is blocking the esophagus and forcing food and liquid down the windpipe," thereby leading to aspiration pneumonia, which is lung infection due to breathing in of a foreign substance.

Esophageal cancer is more common in men than in women, and is less prevalent in the United States than in other parts of the world, like in some Asian and African countries, according to the Mayo Clinic.

While rare, esophageal cancer is also dedly. So far this year, there have been 16,980 new cases of esophageal cancer in the united States, and 14,710 deaths from the cancer, according to the National Cancer Institute. The cancer is often not curable, the A.D.A.M. medical encyclopedia reported.

There are two main types of esophageal cancer: squamous cell carcinoma, which is cancer that starts in the flat cells that line the esophagus and is linked with smoking and alcohol; and adenocarcinoma of the esophagus, which starts in cells that create and release mucus and other bodily fluid, according to the Mayo Clinic.

Adenocarcinoma of the esophagus is the most common kind of esophageal cancer in the U.S., and most often affects white men, according to the Mayo Clinic. Squamous cell carcinoma, on the other hand, is the most prevalent esophageal cancer around the world.

Risk of adenocarcinoma of the esophagus can be increased by Barrett's esophagus, which is a complication of gastroesophageal reflux disease. Being a man, being obese and smoking can also increase the risk for this form of esophageal cancer, according to the A.D.A.M. medical encyclopedia.

Certain factors and behaviors can increase the risk of esophageal cancer, including drinking alcohol, chewing tobacco, having bile reflux, drinking extremely hot liquids, having gastroesophageal reflux disease, being obese, having Barrett's esophagus, smoking, and having radiation treatments to the area, the Mayo Clinic reported. Blisstree reported that Hitchens smoked and drank alcohol in his lifetime (he quit smoking in 2007).

Symptoms of esophageal cancer include problems swallowing, fatigue, chest pain, weight loss, heartburn or indigestion and coughing.

Aside from pneumonia, other complications from esophageal cancer include bleeding, weight loss, coughing and blocking of the esophagus, the Mayo Clinic reported.

Imaging tests, including MRI, CT and PET scans, are often used to diagnose esophageal cancer. The treatment of choice is surgery if the cancer has not yet spread, though chemotherapy and radiation are also options in lieu of or in addition to surgery, according to the A.D.A.M. medical encyclopedia.

Earlier this year, baseball Hall of Famer Harmon Killebrew died of esophageal cancer at age 74. The former Minnesota Twins baseball player died six months after announcing his cancer diagnosis, ESPN reported.

And Bruce Dal Canton, a former baseball player with the Kansas City Royals, Chicago White Sox and Pittsburgh Pirates, died at age 66 in 2008 from esophageal cancer, ESPN reported.

Also on HuffPost:

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Source: http://www.huffingtonpost.com/2011/12/16/esophageal-cancer-christopher-hitchens-pneumonia_n_1154221.html

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Friday, December 16, 2011

Caterpillars mimic one another for survival

Caterpillars mimic one another for survival [ Back to EurekAlert! ] Public release date: 16-Dec-2011
[ | E-mail | Share Share ]

Contact: Richard Levine
rlevine@entsoc.org
301-731-4535
Entomological Society of America

A new study in the current issue of The Annals of the Entomological Society of America helps scientists better understand how organisms depend upon one another

In the world of insects, high risk of attack has led to the development of camouflage as a means for survival, especially in the larval stage. One caterpillar may look like a stick, while another disguises itself as bird droppings. Though crypsis may have its advantages, University of Florida researchers uncovered some of the most extensive evidence of caterpillars using another strategy previously best-known in adult butterflies: mimicry.

Insects use camouflage to protect themselves by looking like inanimate or inedible objects, while mimicry involves one species evolving similar warning color patterns to another.

The study in the current issue of The Annals of the Entomological Society of America helps scientists better understand how organisms depend upon one another, an important factor in predicting how disturbance of natural habitats may lead to species extinctions and loss of biodiversity.

"Mimicry in general is one of the best and earliest-studied examples of natural selection, and it can help us learn where evolutionary adaptations come from," said UF lepidopterist Keith Willmott, lead author of the study and an associate curator at the Florida Museum of Natural History on the UF campus.

Bright warning coloration has evolved in many insects with physical or chemical defenses and further research into how insects metabolize plant toxins for their own benefit has potential use in the medical field.

"It's very interesting how caterpillars can detoxify a plant's poisonous chemicals and resynthesize them for their own chemical defense or for pheromones," said Florida Museum collection coordinator and study co-author Andrei Sourakov. "We can look at the caterpillars' metabolic systems to understand how they deal with secondary plant compounds, the toxic plant substances used for centuries as tonics, spices, medicine and recreational drugs."

Based on the number of eggs laid by a single female butterfly, scientists estimate about 99 percent of caterpillars die before reaching the pupal stage. Survival tactics include sharp spines, toxic chemicals and hairs accompanied by bright warning coloration.

The study focuses on two groups of Neotropical caterpillars: Danaini of the Caribbean Island of Hispaniola and Ithomiini of the upper Amazon in eastern Ecuador. Sourakov raised and observed danaine caterpillars, including the monarch butterfly and its relatives. These species apparently form Mllerian mimicry rings, in which toxic species adopt the same warning color patterns so a predator will more quickly learn which species to avoid.

In Ecuador, Willmott and study co-author Marianne Elias, from the Musum National d'Histoire Naturelle in Paris, found that 22 of 41 ithomiine caterpillars displayed some kind of warning coloration. Five exhibited a previously undocumented pattern with a bright yellow body and blue tips, and four were likely Batesian mimics, in which edible species adopt the coloration of an unpalatable model species for protection. These "freeloaders" only appear to have the defense mechanisms of the model species.

"They act almost like parasites, because the mimics are actually edible and therefore deceive predators without having to invest in costly resources to maintain toxicity," Willmott said. "Such a system can only be stable when the mimics are relatively rare, otherwise predators will learn the trick and attack more individuals of both mimics and models, driving models to evolve novel color patterns to escape the predators."

Mimicry may be relatively rare in caterpillars because it is more difficult for them to establish bright coloration, Willmott said. A brightly colored caterpillar has less chance of evading predators than a mobile adult butterfly.

"In adults, bright coloration may be favored by sexual selection for signaling to males and females," Willmott said. "Bright colors may be disadvantageous since they attract predators, but advantageous for attracting mates. Once established, bright colors might then be modified by natural selection for mimicry, another possible reason why mimicry seems to evolve much more frequently in adults than in caterpillars."

However, Sourakov believes mimicry is more common in caterpillars than scientists realize, but may receive less attention because larvae must be raised to adulthood to identify mimicry complexes, a process that takes weeks of lab work. Also, few collections of immature stages are maintained, and colors are not as well preserved in caterpillars.

"We know mimicry is an important ecological process for several species of animals, and I hope this study will give people incentive to further research immature stages of insects," said Andre Victor Lucci Freitas, a professor in the Instituto de Biologia at Universidade Estadual de Campinas. "We need to remember in most insects, immature stages are the most abundant."

###


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?


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.


Caterpillars mimic one another for survival [ Back to EurekAlert! ] Public release date: 16-Dec-2011
[ | E-mail | Share Share ]

Contact: Richard Levine
rlevine@entsoc.org
301-731-4535
Entomological Society of America

A new study in the current issue of The Annals of the Entomological Society of America helps scientists better understand how organisms depend upon one another

In the world of insects, high risk of attack has led to the development of camouflage as a means for survival, especially in the larval stage. One caterpillar may look like a stick, while another disguises itself as bird droppings. Though crypsis may have its advantages, University of Florida researchers uncovered some of the most extensive evidence of caterpillars using another strategy previously best-known in adult butterflies: mimicry.

Insects use camouflage to protect themselves by looking like inanimate or inedible objects, while mimicry involves one species evolving similar warning color patterns to another.

The study in the current issue of The Annals of the Entomological Society of America helps scientists better understand how organisms depend upon one another, an important factor in predicting how disturbance of natural habitats may lead to species extinctions and loss of biodiversity.

"Mimicry in general is one of the best and earliest-studied examples of natural selection, and it can help us learn where evolutionary adaptations come from," said UF lepidopterist Keith Willmott, lead author of the study and an associate curator at the Florida Museum of Natural History on the UF campus.

Bright warning coloration has evolved in many insects with physical or chemical defenses and further research into how insects metabolize plant toxins for their own benefit has potential use in the medical field.

"It's very interesting how caterpillars can detoxify a plant's poisonous chemicals and resynthesize them for their own chemical defense or for pheromones," said Florida Museum collection coordinator and study co-author Andrei Sourakov. "We can look at the caterpillars' metabolic systems to understand how they deal with secondary plant compounds, the toxic plant substances used for centuries as tonics, spices, medicine and recreational drugs."

Based on the number of eggs laid by a single female butterfly, scientists estimate about 99 percent of caterpillars die before reaching the pupal stage. Survival tactics include sharp spines, toxic chemicals and hairs accompanied by bright warning coloration.

The study focuses on two groups of Neotropical caterpillars: Danaini of the Caribbean Island of Hispaniola and Ithomiini of the upper Amazon in eastern Ecuador. Sourakov raised and observed danaine caterpillars, including the monarch butterfly and its relatives. These species apparently form Mllerian mimicry rings, in which toxic species adopt the same warning color patterns so a predator will more quickly learn which species to avoid.

In Ecuador, Willmott and study co-author Marianne Elias, from the Musum National d'Histoire Naturelle in Paris, found that 22 of 41 ithomiine caterpillars displayed some kind of warning coloration. Five exhibited a previously undocumented pattern with a bright yellow body and blue tips, and four were likely Batesian mimics, in which edible species adopt the coloration of an unpalatable model species for protection. These "freeloaders" only appear to have the defense mechanisms of the model species.

"They act almost like parasites, because the mimics are actually edible and therefore deceive predators without having to invest in costly resources to maintain toxicity," Willmott said. "Such a system can only be stable when the mimics are relatively rare, otherwise predators will learn the trick and attack more individuals of both mimics and models, driving models to evolve novel color patterns to escape the predators."

Mimicry may be relatively rare in caterpillars because it is more difficult for them to establish bright coloration, Willmott said. A brightly colored caterpillar has less chance of evading predators than a mobile adult butterfly.

"In adults, bright coloration may be favored by sexual selection for signaling to males and females," Willmott said. "Bright colors may be disadvantageous since they attract predators, but advantageous for attracting mates. Once established, bright colors might then be modified by natural selection for mimicry, another possible reason why mimicry seems to evolve much more frequently in adults than in caterpillars."

However, Sourakov believes mimicry is more common in caterpillars than scientists realize, but may receive less attention because larvae must be raised to adulthood to identify mimicry complexes, a process that takes weeks of lab work. Also, few collections of immature stages are maintained, and colors are not as well preserved in caterpillars.

"We know mimicry is an important ecological process for several species of animals, and I hope this study will give people incentive to further research immature stages of insects," said Andre Victor Lucci Freitas, a professor in the Instituto de Biologia at Universidade Estadual de Campinas. "We need to remember in most insects, immature stages are the most abundant."

###


[ 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/2011-12/esoa-cmo121611.php

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