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Sat Nov 30, 2019, 01:13 PM

You may need to rethink your dog's age

https://www.newscientist.com/article/2224268-convert-your-dogs-age-into-human-years-using-this-new-formula/

Convert your dog's age into human years using this new formula
21 November 2019
By Jake Buehler

You may need to rethink your dogís age. Conventional wisdom says that one human year is the equivalent of seven dog years, but a new analysis suggests we have been getting this all wrong.

The seven dog years to every human year rule comes simply from crudely dividing human lifespan, around 80 years, by dog lifespan, typically 12 years. Trey Ideker at the University of California, San Diego, and his colleagues found that the rule is a little off.

The team performed a genetic analysis of dogs and humans to identify how they age over time. The researchers discovered that compared with humans, dogs age faster at first, blazing into the equivalent of human middle age after only a few years.

But this ageing quickly tapers off, with the next 10 years only accruing two human decadesí worth of changes. The team put this together into a single formula plotted in the graph below: human_age = 16 ln(dog_age) + 31. It is a significant revision to our understanding of how to map dogs against their human owners in terms of age, says Ideker.



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Arrow 22 replies Author Time Post
Reply You may need to rethink your dog's age (Original post)
dalton99a Nov 30 OP
hlthe2b Nov 30 #1
targetpractice Nov 30 #2
dalton99a Nov 30 #3
targetpractice Nov 30 #6
Bayard Nov 30 #4
mr_lebowski Nov 30 #5
emmaverybo Nov 30 #7
mopinko Nov 30 #12
cstanleytech Dec 1 #15
emmaverybo Dec 1 #16
cstanleytech Dec 1 #17
emmaverybo Dec 1 #19
muriel_volestrangler Dec 2 #21
emmaverybo Dec 2 #22
PoindexterOglethorpe Nov 30 #8
Harker Nov 30 #9
PoindexterOglethorpe Nov 30 #13
Harker Nov 30 #14
Wednesdays Nov 30 #10
Martin Eden Nov 30 #11
SCantiGOP Dec 1 #20
Rhiannon12866 Dec 1 #18

Response to dalton99a (Original post)

Sat Nov 30, 2019, 01:18 PM

1. Graphic combines two of my most favorite things... Tom Hanks and Dogs! LOL

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 01:25 PM

2. Where did the Tom Hanks vs Dog graphic come from?

I love it, but it's not in the article in your link.

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Response to targetpractice (Reply #2)

Sat Nov 30, 2019, 01:31 PM

3. From the original paper:

https://www.biorxiv.org/content/biorxiv/early/2019/11/04/829192.full.pdf
Quantitative translation of dog-to-human aging by conserved remodeling of epigenetic networks

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Response to dalton99a (Reply #3)

Sat Nov 30, 2019, 02:36 PM

6. Thank you, dalton99a! n/t

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 01:40 PM

4. Fascinating

That would make our 3 Pyr's in their 60's, and the mini-doxie is off the the chart.

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 02:03 PM

5. Science, useless trivia, and Doggos ... 3 of my favorite things :) How about doing Kittehs next? nt

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 03:07 PM

7. What does In mean? I read the study, but still can't do the math. My two dogs are around 10 years

old. I know they are seniors. In traditional projections, which I assumed are based on stats, different breeds have different max lifespans. Most of us then go by what breed seems dominant in our dogs, which of course is unscientific. Littler dogs tend to have longer lifespans.

Boo hoo, unfair that dogs donít have the actual human lifespan.

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Response to emmaverybo (Reply #7)

Sat Nov 30, 2019, 06:09 PM

12. their only flaw.

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Response to emmaverybo (Reply #7)

Sun Dec 1, 2019, 01:36 AM

15. "Boo hoo, unfair that dogs don't have the actual human lifespan." Considering the size and number

of litters they can produce adding a longer lifespan on top of that might not exactly be a good thing.

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Response to cstanleytech (Reply #15)

Sun Dec 1, 2019, 02:37 AM

16. Mandatory spay and neuter programs could work, if enforced. Then we would have to find them .

homes, which could be done if municipal animal care and control had the resources and used them. But they never will have such life-spans. No kill shelter proponents make the case that there are enough homes, but many of the shelters donít market, donít bother to find owners, doní5 do enough to not kill. Now parrots do have our lifespan and longer. Thatís a problem for guardians! They have to be sure they have a plan for the birds they will leave behind.

I guess weíd need to control human population to accommodate longer-living dogs. I donít have a problem with that.

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Response to emmaverybo (Reply #16)

Sun Dec 1, 2019, 02:54 AM

17. Long term probably would not work as there bound to be some animals that escape into

the wild before they were rendered sterile and once they managed to breed with wild canines you could have a potential problem.

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Response to cstanleytech (Reply #17)

Sun Dec 1, 2019, 01:44 PM

19. Well, there it is. I am in the science group I see! And you are talking truth to sentiment. We could

never, especially world wide, control their population, or care for all, so if they had longer lives, more would live horrible lives for more time. Facts of life.

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Response to emmaverybo (Reply #7)

Mon Dec 2, 2019, 06:58 PM

21. It's a lower case L, not a capital i - "ln" the natural logarithm

If you have a scientific calculator, it should have an 'ln' button; but you can use Google as that. Just type, for instance, "=16*ln(10)+31" into the Google search box, and it gives you the human equivalent of 10 as 68.

I'm not convinced this works for old dog ages; the record for a dog is 29 and a half, which translates to only 85.

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Response to muriel_volestrangler (Reply #21)

Mon Dec 2, 2019, 07:50 PM

22. Thank you so much! I am amazed a dog lived that long. And right, sounds like the algorithm

needs a tune up. My dogs are just a bit younger than I am. They look great for their age. You taught me something, neat.

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 03:57 PM

8. I've long known that the seven dog years equals one human year

is highly inaccurate. Plus, typical lifespans vary enormously depending on the breed.

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Response to PoindexterOglethorpe (Reply #8)

Sat Nov 30, 2019, 04:00 PM

9. And whether or not one smokes.

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Response to Harker (Reply #9)

Sat Nov 30, 2019, 08:40 PM

13. LOL!

My brother is involved in Irish Wolfhound rescue, and not only does he get them already well past puppyhood, but they tend to live 9 years or less. Usually less.

Among the several reasons I like cats is that they tend to live longer.

But all of our four-legged friends are precious.

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Response to PoindexterOglethorpe (Reply #13)

Sat Nov 30, 2019, 08:53 PM

14. They certainly are precious...

the candle that burns twice as brightly burns half as long, it seems.

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 04:26 PM

10. My formula was always

the first year of the dog's life = 15 human years, then five human years for each year after that. This graph is even steeper than that. 🤔

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Response to dalton99a (Original post)

Sat Nov 30, 2019, 05:57 PM

11. Our yellow lab Hunny passed away several years ago, a few months shy of 17

Looks like she was off the chart.

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Response to Martin Eden (Reply #11)

Sun Dec 1, 2019, 10:59 PM

20. Oldest dog I ever knew

When I was a kid, an aunt had a chihuahua who made it to 22.
She actually recorded pets arrivals and deaths in her Bible.

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Response to dalton99a (Original post)

Sun Dec 1, 2019, 03:06 AM

18. I also think age depends on the dog's size/breed. Two of my dogs lived past 18

But they were not large dogs, a Cairn Terrier and a Cocker Spaniel.

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