Do you really know the age of your puppy? For
many years, we have been told 1 dog year equals 7 human years. But according to
a new study released in July, 2020, scientists find out a new way to calculate
dogs’ ages, which proves the 1:7 ratios to be an inaccurate measure of age. In
this article, Happy & Polly will show you this new way to calculate a dog’s
ages.
Dog
Age Research
The research was done by scientists of the
University of California San Diego (UCSD) School of Medicine. They worked with genome
experts to devise a more accurate formula to calculate a dog’s age. This
formula is based on the chemical changes in the DNA.
To learn more about
dogs’ aging process, scientists gathered and analyzed blood
samples of 105 Labrador retrievers, with different ages from a few weeks to 16
years old. They sequenced the genomes of the Labradors to tune “DNA methylation”,
which is a process that many species undergo as they age.
They also developed a new molecular tool
called the “epigenetic clock”. Using this tool, they can drill into the rate of
molecular changes in dog’s DNA to learn the patterns of change in chemical
markers on the DNA of aging.
According to the research, during the course
of life, human and dog DNA doesn't change much, but chemical marks on the DNA do.
We learn from one researcher of this team that the epigenetic changes provide
clues to a genome’s age – similar to wrinkles on a person’s face which provide
clues to their age.
How to Calculate
Dog Years?
Although dogs share the same environment as human
beings and also follow similar developmental trajectories, scientists found that on a molecular level, their
aging is much more complicated. In dogs' first year of life, Canine epigenetic clock ticks much faster than the
human one. But as years pass, the clock rate slows down later in life.
According to this
study, the equation to calculate a dog’s age in human years is: A dog's human age = 16 * ln(age in dog
years) + 31, which means you multiply the natural log of a dog's age by 16,
then add 31.
If you don’t understand the equation, you
can refer to the below graph depicting the new aging formula for dogs.
From the above equation and graph, we can
learn that: age of an 8-week-old puppy = that of a 9-month-old baby. However, a
1-year old puppy is like a 30-year old human, while a 4-year old dog is similar
to a 52-year-old human. They are really much older than we thought they were.
However, these data were only based on
Labrador retrievers. Though dogs live about 12 years on the average, some
breeds may live longer. More tests on other breeds will be needed to prove this
clock applies to all breeds.
We hope this article can help you better
learn your dog. If you enjoyed it and would like to see more news, do not
hesitate to visit Happy & Polly website on https://happyandpolly.com.
Comments
Post a Comment