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Elusive workers are more likely to differentiate into replacement reproductives than aggressive workers in a lower termite

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Current Zoology 2023年第3期69卷 332-338页

作者： Zhuang-Dong Bai Chong-Yang Shi David Sillam-Dusses Rui-Wu Wang School of Ecology and Environment Northwestern Polytechnical UniversityXi'an 710072China Laboratory of Experimental and Comparative Ethology LEECUR 4443University Sorbonne Paris NordVilletaneuseFrance

One of the most intriguing questions in eusocial insects is to understand how the overt reproductive conflict in the colony appears limited when queens or kings are senescent or lost because the morphologically similar individuals in the colony are reproductively totipotent.Whether there are some individuals who preferentially differentiate into replacement reproductives or not has received little attention.The consistent individual behavioral differences(also termed“animal personality”)of individuals from the colony can shape cunningly their task and consequently affect the colony fitness but have been rarely investigated in eusocial insects.Here,we used the termite Reticulitermes labralis to investigate if variations in individual personalities(elusiveness and aggressiveness)may predict which individuals will perform reproductive differentiation within colonies.We observed that when we separately reared elusive and aggressive workers,elusive workers differentiate into reproductives significantly earlier than aggressive workers.When we reared them together in the proportions 12:3,10:5,and 8:7(aggressive workers:elusive workers),the first reproductives mostly differentiated from the elusive workers,and the reproductives differentiated from the elusive workers significantly earlier than from aggressive workers.Furthermore,we found that the number of workers participating in reproductive differentiation was significantly lower in the groups of both types of workers than in groups containing only elusive workers.Our results demonstrate that the elusiveness trait was a strong predictor of workers’differentiation into replacement reproductives in R.labralis.Moreover,our results suggest that individual personalities within the insect society could play a key role in resolving the overt reproductive conflict.

关键词： consistent individual behavioral differences reproductive conflict reproductive differentiation,Reticulitermes labralis termite

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