How long do animals live? Although the question may seem small, it is not easy to answer - especially in the case of independent animals, it is very difficult to determine the date of birth and death for all members of a given population. For comparison, the zoo carefully records the births and deaths of animals. However, there are now studies that allow us to compare demographic parameters, including life expectancy, with respect to older people known in nature.
Smaller species live longer
A team of researchers led by the University of Lyon and the University of Zurich estimated the demographic parameters of more than 50 mammal species. Scientists have found that more than 80% of mammals have studied in zoos - such as the African buffalo, deer, zebra, vulture or lion. “All 15 species of predators in our database have lived longer in zoos,” said Marcus Klaus, a professor of nutrition and biology at the University of Zurich and wildlife. "Even for wildlife, wildlife doesn't seem dangerous."
This zoo is most noticeable among small species with longer and shorter lives, such as shrubs, foxes, white tails or African wild dogs. Adolescents and adults of this type tend to fall victim to predation or competition in the wild and thus reduce life expectancy. “When it comes to long-lived people with low mortality rates in nature, there are few zoos that can protect them.
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| Source: google |
Save time to measure success
The researchers noted that the results reflect the historical status of the farm and are currently unavailable. "In order to estimate the life expectancy of the population, we only consider the 'extinct community', ie all people born over a period of time, and those who have survived will delay the investigation," he said. . He is a researcher at Francois Lemaître University in Lyon and at the National Research University (CNRS). This means that the changes in long-term livestock farming that have taken place over the last decade have not affected the results, as many of the members affected by these changes are still alive. Only thirty years can be determined if the changes made today have a lasting effect.
Zoological ethics
Researchers emphasize that longevity as the only contributing factor may not support complex ethical assessments of animal care. Prof. "A broad assessment of plant reproduction requires many other considerations. The most important understanding of our research will show that life in nature is not life in heaven," Klaus said.
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| Source: google |
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