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Medical Q&A: A year adrift on the Pacific?

WELLINGTON, New Zealand (AP) -- The story of a Salvadoran fisherman who says he survived more than a year adrift on the Pacific Ocean raises many medical questions. The Associated Press spoke with Claude Piantadosi, a professor of medicine at Duke University and author of the book "The Biology of Human Survival," to find out what is physically possible and for his view on the tale of Jose Salvador Alvarenga. This is an edited version of the interview:

Q: How long can a human survive without any water, or without any food?

A: The average is about 100 hours (approximately four days) without water and about five or six weeks without food. You can survive much longer with just a little food, although you'll lose weight and run into vitamin deficiency problems. So it would have been vital for Alvarenga to have collected both food and water during his journey. The Pacific's regular squalls would have provided some rainwater that he could have scooped from the bottom of his boat.

Q: How important is shade?

A: Absolutely critical. You get significantly warmer in direct sunlight and sweat more. The pictures of the boat show a fiberglass box in the middle which he could have sheltered in, and any type of canvas would have helped keep him out of the sun.

Q: Alvarenga described catching turtles, fish and birds with his hands and eating them. Is that plausible?

A: Over time, the underside of the boat would have become its own ecosystem as barnacles, seaweed and jellyfish collected there, which in turn attracts other creatures. How often can you grab a turtle or catch a fish with your bare hands? I don't know. Bird blood is no more salty than human blood, so would have provided some hydration.

Q: Without fruit and vegetables, wouldn't he have developed scurvy?

A: Actually, unlike humans, birds and turtles make their own vitamin C, so fresh meat from those creatures, especially the livers, would provide sufficient vitamin C to prevent scurvy. British sailors used to get scurvy because they ate preserved meat which had oxidized and lost its vitamin C.

Q: Wouldn't he get skin sores from all that water?

A: He'd need to keep mopping himself off and stay dry to avoid that. People on life rafts, or say a piece of floating wood, can develop real problems with macerated skin. Staying out of the water is a huge advantage.

Q: There's some suggestion that Alvarenga was a large man before he left. Would being overweight provide an advantage?

A: It would be a significant advantage. He could live off his own body fat and muscle for a long time, so long as he was able to get some water, vitamins, micronutrients and a little protein.

Q: Didn't he look too healthy, even a little bloated, when he arrived?

A: The appearances of malnutrition can manifest differently depending on how short you are on calories or protein. Some underfed children in Africa look like stick figures, others get swollen. It's only in end stage starvation that people get that really emaciated appearance.

Q: Alvarenga seemed to give confused and contradictory answers to authorities. What kind of psychological effects would such a journey have?

A: I'm not an expert in psychiatry, but we all have the feature of resilience. It can be trained or even learned on the fly. For instance, soldiers learn to deal with combat horrors. Presumably he was out on the ocean every day as a fisherman before he went missing, so he would have been familiar with the environment and with adapting his behavior to the elements.

If he had nutritional deficiencies, he may have developed some dementia or other syndromes which compromised his mental state. I'm not surprised that some of the answers he gave were a bit off and he wasn't able to remember things.

Q: How long would it take to recover from a voyage like this?

A: Hydration can be restored in just a day or two. Re-feeding can be tricky after a long period of starvation, as the body can lose the ability to absorb nutrients. Muscle rehabilitation and physical therapy can take several weeks.

Q: Bottom line - is Alvarenga's story plausible?

A: Yes. It's unusual to say the least. But reports out of Mexico indicate he did go missing in late 2012. As we have gotten more information, it's probably likely that he did survive at sea for 13 months.

© 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

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barzon1492 February 06 2014 at 5:03 PM

This guy looks more like he had been eating burgers than being adrift in the ocean!

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sail1752 February 06 2014 at 2:09 PM

Not true AT ALL----------

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Bob February 06 2014 at 2:02 PM

I would just say Great Job...I mean the news people for keeping us entwined in their bull crap stories while bombing us all with non pertinent ads.

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CHUCKIE February 06 2014 at 1:53 PM


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nanadanlin February 06 2014 at 1:48 PM

I would certainly like to see the clothing or a picture of his clothing that he was wearing after being exposed to sun and saltwater for over a year. He also shows no sign of his facial cheeks/jowls being exposed to the elements for that same period of time. I also would like an explanation for the pristine appearance of the photograph of his son. SIMPLY AMAZING.

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piknplundr February 06 2014 at 10:41 PM

I believe him and I definitely believe what the doctor from Duke has to say about it. Why would he make up something like this? He is an experienced fisherman and is no stranger to the ocean. He knew what to do and he survived. I don't understand why people are being so nasty calling him a liar.

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genegene002 February 06 2014 at 3:38 PM

one word comes to mind! WILLLLSONNNNNN! (WILSON)

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1 reply
cjadee19 genegene002 February 06 2014 at 4:58 PM

That came to my mind too lmao!

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grdnbru February 06 2014 at 12:49 PM

The big queestion to me is: Did he arrive in the South Pacific in the same boat that he left in? If that's the case, how did it get there if not drifting? Did someobdy tow him? The boat is gone for 14 months and shows up 6,000 miles to the west of it's departure point. How could that happen other than drifting?

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1 reply
Joe Myhand grdnbru February 06 2014 at 1:52 PM

The Boat was recycled, on order to help prevent Climate Change...:) Everybody know's that.. :)

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Kathleen February 06 2014 at 10:21 PM

I totally believe it. On my sailboat to Hawaii, I was becalmed for 45 days. I lost 40 lbs. That first bite of McDonalds was heaven.

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jnwesner February 06 2014 at 12:55 PM

Oh, my. After hearing from the real expert (Duke University?), it's interesting to read postings from the self-appointed experts. Nasty, vicious, and cynical seems the rule. Snap judgements are so easy. Well, I can't claim to know what happened. But I'd rather take the statement from the man who was afloat and the Duke expert as true than make the assumption that so many are eager to make.

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2 replies
BANDIT BILL jnwesner February 06 2014 at 1:03 PM

And I bet you believe if you have healthcare you can keep it. Or government grant paid scientists always saying 'Global warming" but changed it to "Climate Change" when that didn't fit. We could use some warming, don't you think. Don't always believe like a liberal drone.

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freefal541 jnwesner February 06 2014 at 1:34 PM

Look at peoples who are truly starving. You don't see body fat, especially in the face. Sometimes you just have to use COMMON SENSE! BTW, a stavation diet causes skin breakdown, loss of hair, loss of teath, loss of muscle and loss of body fat. None of which are evident in this man!

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