Obesity is not only a problem faced by more and more people. A U.S. study found that the proportion of obese people has grown from wild mice to domestic pets to laboratory-raised primates. ■Animal fat David Ellison of the University of Alabama at Birmingham studied data from the Wisconsin National Primate Research Center and found that the average weight of marmosets has increased over the past few decades. These data collection sites have not changed, and people there have not deliberately fed fat monkeys. The reason for their fatness seems to be due to dietary changes. However, in recent years, the feeders have changed their feed content, and the ape monkeys have not lost weight. Ellison decided to study in depth the causes of animal fat. He led his colleagues to collect data from the last 50 years of the 20th century, showing the weight of the laboratory rhesus monkeys, chimpanzees, and domestic pet dogs in 8 categories, 12 populations, and more than 20,000 animals in the middle-aged period. The researchers divided 12 populations into 24 groups based on gender, and then analyzed the changes in body weight of each population. The American Fun Science website quoted Ellison as saying on the 24th: “The 24 groups have seen an increase in the percentage of weight change, which strongly suggests that some things are happening.†■Different degrees The researchers defined the most significant 15% of the early data as "obesity," and then analyzed the changes in the proportion of obesity that each group passed over time. The results showed that the proportion of obesity in the 23 groups increased. Ellison said that the changes in different species are different, but most of them are more obvious. Researchers published a report on the "Journal of the Royal Society of Biology," published on the 23rd, that the average body weight of male rhesus monkeys increased by 7.7% per 10 years, female rhesus monkeys gained 7.9% per 10 years, and male rats every 10 The annual weight gain was 10.5%, and the female rats gained 11.8%. The average weight of female pet cats increased by 13.6% every 10 years, and the male cats increased by 5.7%. ■Reasons are complicated Researchers believe that this result shows that gaining weight is a complex problem, not only because of the high energy intake and low consumption. Ellison said that some theories believe that even if there is no fast food, not sedentary office, humans and animals may also gain weight, and the "culprit" may be the germ. Previous studies have shown that a virus called "adenovirus 36" is associated with human and animal obesity. In addition, experiments have shown that compounds that disrupt hormone levels cause mice to gain weight. He said that the increase in the proportion of human and animal obesity may also be due to changes in the living environment. Previous studies have shown that light pollution and sleep disorders are related to obesity. Air-conditioning and heating facilities may also be accomplices of obesity. "In the winter, you don't have to burn too much energy because the room stays warm," he said. "In the summer, the house is no longer hot. We know that hot weather makes food intake less." However, Ellison stressed that these factors are just speculation at this stage. Jennifer Cook, an obesity expert at York University in Canada, commented that many researchers are constantly exploring fat-fat factors as the key to understanding the epidemic of human obesity. Gift Measuring Tape,Pocket Gift Measuring Tape,Mini Pocket Measuring Tape,Color Pocket Measuring Tape Shangqiu Hengli Measuring Tools Co.,Ltd , https://www.jjmtools.com
Researchers believe that the reason for the prevalence of obesity may lie not only in the intake of calories, less physical exercise, but also in changes in the general environment of life.