Diploid male production — a significant colony mortality factor in the fire ant Solenopsis invicta (Hymenoptera: Formicidae)
Diploid male production — a significant colony mortality factor in the fire ant Solenopsis invicta (Hymenoptera: Formicidae)
复制标题
二倍体雄性生产——火蚁Solenopsis invicta（膜翅目：蚁科）的一个重要群体死亡因素
DOI：
--
复制
发表时间：
1986
影响因子：
2.3
通讯作者：
D. Fletcher
中科院分区：
文献类型：
--
作者：
K. Ross;D. Fletcher
摘要红火蚁（Solenopsis invicta）有两种形式，分布于北美；单雌性形式的群体具有单个功能性女王，而多雌性形式的群体包含许多功能性女王。实地调查表明，二倍体雄性在多雌体形式的自然种群中很常见，但在单雌体种群中不存在，与此相反，实验室数据显示，在两种类型的种群中，蜂王产生此类雄性的频率相似。我们的结果表明，成熟的单雌蚁群在实验室中养育了被收养的蚁后的二倍体雄性，因此，在田间单雌蚁群中缺少这些雄性不太可能是由于单雌蚁工蚁对它们的歧视。另一方面，产生二倍体雄性的早期单雌性群体比仅产生工蜂的群体表现出显着更高的死亡率和显着更慢的生长速度（图1-3）。这些结果表明，在 S. invicta 中观察到的雄性二倍体分布可以通过产生两种形式的二倍体雄性群体的死亡率差异来解释，其中单雌体形式的这种群体在发育早期经历 100% 的死亡率。该因素造成的死亡率差异与两种形式的不同社会结构和殖民地建立模式有关。
SummaryTwo forms of the fire ant, Solenopsis invicta, occur in North America; the monogyne form has colonies with a single functional queen while the polygyne form has colonies containing many functional queens. Field surveys indicate that diploid males are common in natural populations of the polygyne form but absent from monogyne populations, in contrast to laboratory data showing that similar frequencies of queens producing such males occur in the two types of populations. Our results show that mature monogyne colonies with adopted queens rear diploid males in the laboratory, so it is unlikely that the absence of these males from monogyne colonies in the field is due to discrimination against them by monogyne workers. On the other hand, incipient monogyne colonies that produce diploid males exhibit significantly higher mortality and significantly slower rates of growth (Figs. 1–3) than colonies producing workers only. These results suggest that the observed distribution of male diploidy in S. invicta can be explained by differential mortality of diploid male producing colonies of the two forms, with such colonies of the monogyne form experiencing 100% mortality early in development. The mortality differences due to this factor are shown to be related to the different social structures and modes of colony founding characterizing the two forms.