We often hear the "survival of the fittest" as an idea of different life scenarios, be it health, sports or business. The idea applies in most cases, but if we consider the survival of some species in the real world, there is a chance that the laziest ones are more likely to live longer.
This is what a group of researchers from the University of Kansas found after examining some extinct and living species of mussels and gastropods in the Atlantic.
In this work, the team analyzed the physiology and development of up to 299 species of aquatic soft animals – including day slugs and slugs – in the last five million years.
"The reason we chose the Western Atlantic as a study area is because we have excellent large data sets that record the distribution of fossil and living molluscs from that region. Strotz, the lead author of the paper, said in a statement." I've used a lot of fossil material from collections in the US "
They looked at the incidence and extinction of various species during that period, as well as their respective metabolic rates or the amount of energy each of the creatures needed to survive.
To the great surprise, the results of the work showed that metabolic rates represent a reliable predictor of the likelihood of extinction of a particular species or species community.
"We have found a difference for mollusks in the last 5 million years extinct and still exist today eren, "added Strotz. "Those who are extinct tend to have higher metabolic rates than those who still live. [Meanwhile,] those with lower energy maintenance requirements seem to be more viable than those with higher metabolic rates."
While other factors also play a role Englisch: emagazine.credit-suisse.com/app/art … = 120 & lang = en. emagazine.credit-suisse.com/app/art … = 120 & lang = DE Predicting which animals will die out in the future. Englisch: emagazine.credit-suisse.com/app/art … = 120 & lang = en , one should take into account that scientists can better understand the mechanisms of extinction, especially in connection with problems such as global warming
"Perhaps in the long run The best evolutionary strategy for animals is to be cumbersome and sluggish – the lower the metabolic rate, the more likely the species to which you belong will survive, "co-author Bruce Lieberman said in the same statement. "Instead of" survival of the best, "perhaps a better metaphor for the story of life is" survival of the laziest "or at least" survival of lethargic.
Despite the extinction of millions of y ears, the average metabolic rate of the species has remained largely unchanged over the five million years, but the team found that high metabolic rates were a better indicator of extinction if the animals were in one
"The distribution size is an important component of the extinction probability, and closely distributed species [with high metabolic rate] seem to be far away. The researchers are of the opinion that the results of the study are also applicable to other marine animals further studies are needed to understand if this also applies to rural residents.