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Wiley InterScience | ||||||||||||||
  Ecological EntomologyVolume 29 Issue 2, Pages 203 - 207 Published Online: 2 Apr 2004 Journal compilation © 2010 The Royal Entomological Society
Abstract | References | Full Text: HTML, PDF (Size: 113K) | Related Articles | Citation Tracking  Queen lifespan and colony longevity in the ant Harpegnathos saltator Copyright Royal Entomological Society, 2004 KEYWORDS Eusociality • life history • longevity • mortality • nest • ponerine • queen lifespan • social insects ABSTRACTAbstract. 1. The longevity of field colonies was investigated in the ponerine ant Harpegnathos saltator (Jerdon) in which either reproductive workers (gamergates) or a single queen reproduce. 2. Data from 3 years were used to calculate the ratio between queen-right (n = 50) and gamergate (n = 12) colonies that can be used to derive the colony mortality of gamergate colonies. Using the survival rates of queens in the laboratory, extrinsic and intrinsic mortality rates of queen-right colonies were calculated. 3. No significant differences in the sizes of queen-right and gamergate colonies above 14 workers was found, suggesting that mortality of established colonies is not size related. 4. The mortality of gamergate colonies is 4.17 times higher than the intrinsic mortality of queen-right colonies. 5. In the laboratory, mean survival time of queens in colonies of more than 14 workers was 1.79 years. 6. Estimated mean survival time of queen-right and gamergate colonies in the field varies between 0.78 and 0.43 years respectively, when no costs of conflict during the replacement of queens occur; however, when the latter costs increase colony mortality to a level similar to extrinsic mortality, the calculated longevity of queen-right colonies would increase to 1.02 years. Accepted 22 October 2003 | 
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