Summary
The production of replacement reproductives in experimentally orphaned societies was investigated in Nasutitermes princeps (Desneux). From 1 to 180 replacement queens and multiple kings, all adultoids, were found in the 13 nests that were re-collected. Normal imagos, microimagos, or a mixture of the two forms were present, depending on colony composition at the time of orphaning. In colonies with alates, the corresponding forms were found as replacement reproductives. Where only young nymphs were present, microimagos differentiated. Neither the number of queens nor their level of physogastry was correlated with the time elapsed since orphaning, but the total egg-laying rates were. We suggest that competition among queens rather than time determines individual physogastric development. Observations show that the most likely cause of accidental queen death in nature is probably nest fall from the supporting tree. Even in this case, the queen may be able to migrate to a newly rebuilt nest. An experimental simulation of this situation showed that colony migration can occur. The data indicate that the replacement of the primary queen after her accidental death cannot by itself account for the high rate of polygyny (60%) encountered in N. princeps. Two other possible causes are the replacement of the ageing foundress as a normal event of colony life, and colony reproduction by budding off new nests with adultoid reproductives.
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King Léopold III Biological Station, Laing Island, Papua New Guinea, contribution no. 84
Research Assistant of the National Fund for Scientific Research (Belgium)
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Roisin, Y., Pasteels, J.M. Replacement of reproductives in Nasutitermes princeps (Desneux) (Isoptera: Termitidae). Behav Ecol Sociobiol 18, 437–442 (1986). https://doi.org/10.1007/BF00300519
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DOI: https://doi.org/10.1007/BF00300519