The effect of neighbours on the mortality of harvester ant colonies
The effect of neighbours on the mortality of harvester ant colonies
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DOI：
10.1046/j.1365-2656.1998.00169.x
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发表时间：
1998-01-01
影响因子：
4.8
通讯作者：
Kulig, A
中科院分区：
文献类型：
--
作者：
Gordon, DM;Kulig, A
1.本研究探讨了同种邻居的密度和大小如何影响已建立的殖民地的死亡率。数据来自250-300个红收获蚁[Pogonomyrmex cumulatus（F. Smith）]，占地10公顷，1988年至1995年。2。随着年龄的增长，殖民地更有可能死亡。小邻居倾向于降低死亡的概率。4.死亡的概率每年都有很大的变化。拥挤对死亡率的影响很小。在25米的尺度上，死亡概率似乎没有空间效应。以前的工作表明密度对新殖民地的建立和对已建立殖民地的生殖输出的影响。这里提出的结果表明，与邻国的竞争很少导致已建立的殖民地的死亡。
1. This study investigates how the density and size of conspecific neighbours affected the mortality of established colonies. Data were from a population of 250-300 colonies of the red harvester ant [Pogonomyrmex barbatus (F. Smith)], on a 10-ha site, from 1988 to 1995.2. Colonies are more likely to die as they grow older.3. Small neighbours tend to lower the probability of dying.4. The probability of dying varied significantly from year to year.5. There was little effect of crowding on mortality.6. There appeared to be no spatial effects, on the scale of 25 m, on the probability of dying.7. Previous work shows effects of density on the founding of new colonies and on the reproductive output of established ones. The results presented here indicate that competition with neighbours rarely causes the death of established colonies.