A new study published in the journal Nature Communications challenges the popular explanation for why a social insect becomes a worker or a queen.

The study, conducted by researchers at the University of California, Berkeley, found that the amount of food a social insect consumes as a larva does not determine its caste, as previously thought. Instead, the researchers found that the amount of food a social insect consumes as an adult is what determines its caste.

This finding has implications for understanding how social insect colonies are organized and how they function. It also challenges the traditional view of how social insects evolve.

The traditional explanation

The traditional explanation for why a social insect becomes a worker or a queen is based on the idea of "differential nutrition." This theory states that the amount of food a social insect consumes as a larva determines its caste.

According to this theory, larvae that consume more food develop into queens, while larvae that consume less food develop into workers. This is thought to be because the nutrients in food are needed for the development of the reproductive organs of a queen.

The new study

The new study challenges the theory of differential nutrition. The researchers found that the amount of food a social insect consumes as a larva does not affect its caste. Instead, they found that the amount of food a social insect consumes as an adult is what determines its caste.

This finding is based on experiments conducted on the ant species Harpegnathos saltator. In these experiments, the researchers found that larvae that were fed a high-protein diet as adults developed into queens, while larvae that were fed a low-protein diet as adults developed into workers.

Implications for understanding social insect colonies

The finding that the amount of food a social insect consumes as an adult determines its caste has implications for understanding how social insect colonies are organized and how they function.

For example, this finding suggests that social insect colonies may be more flexible than previously thought. It may be possible for a colony to change the caste of an individual insect by changing the amount of food it is given.

This finding also challenges the traditional view of how social insects evolve. The traditional view is that social insects evolved from solitary ancestors. According to this view, the evolution of sociality was driven by the benefits of cooperation.

However, the new finding suggests that the evolution of sociality may not have been driven by cooperation alone. It is possible that the evolution of sociality was also driven by the benefits of differential nutrition.

Conclusion

The new study published in Nature Communications challenges the popular explanation for why a social insect becomes a worker or a queen. The study found that the amount of food a social insect consumes as a larva does not determine its caste, as previously thought. Instead, the researchers found that the amount of food a social insect consumes as an adult is what determines its caste.

This finding has implications for understanding how social insect colonies are organized and how they function. It also challenges the traditional view of how social insects evolve.