Aggression regulates monogyny in non-mutilating Diacamma ants
Aggression regulates monogyny in non-mutilating Diacamma ants
复制标题
攻击性调节非残害性迪亚卡玛蚁的一夫一妻制
DOI：
10.1007/s00040-012-0251-9
复制
发表时间：
2012
期刊：
影响因子：
1.3
通讯作者：
C. Peeters
中科院分区：
文献类型：
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作者：
L. Cournault;C. Peeters
在没有蜂王的蚂蚁物种中，蚁群由具有同等繁殖潜力的工蚁组成。攻击性互动调节生育和性行为。Diacamma属是不寻常的，因为一夫一妻制是通过对所有年轻工人的肢解(即切除一对微小的有神经的胸部附件)来调节的。一个例外是来自印度南部的尼尔吉里人，那里只有6%的工人在10个野外殖民地被肢解(范围在2.8-12.5%之间)。尽管如此，所有的殖民地都是一夫一妻制。为了研究“nilGiri”中“配偶门”(已交配的生殖工作者)替换的行为机制，我们通过实验将蜂群一分为二。在缺乏游戏门的群体中，年轻工人很快就开始咄咄逼人。其中一只在1-2天后表现出优势姿势，这只新的阿尔法在2-3周内开始产卵和性召唤。当她面对最初的游戏门时，嗅觉识别立即发生，这有时会导致典型的优势行为(“刺伤涂抹”)。研究人员研究了85名已知年龄的年轻工人的命运：他们通常是来自游戏之门或新阿尔法的攻击目标。它们的宝石引起了人们的注意，尽管它们很少被移除。Gema信息素的一个小变化显然导致了进化上的转变，从残缺(就像在非常接近的D.ceylonense中发生的那样)到‘nilGiri’繁殖的可逆调节。
In queenless species of ants, colonies consist of workers with equivalent reproductive potentials. Aggressive interactions regulate fertility and sexual activity. The genus Diacamma is unusual, because monogyny is regulated by mutilation (i.e., removal of a pair of tiny innervated thoracic appendages) of all young workers. One exception is the ‘nilgiri’ population from south India, where only 6 % of workers were mutilated in ten field colonies (range 2.8–12.5 %). Nonetheless, all colonies were monogynous. To investigate the behavioural mechanisms underlying the replacement of the ‘gamergate’ (mated reproductive worker) in ‘nilgiri’, we experimentally divided colonies in two. In the groups lacking the gamergate, aggression soon started among the younger workers. One of these workers exhibited a dominant posture after 1–2 days, and this new alpha started ovipositing and sexual calling within 2–3 weeks. When she was confronted with the original gamergate, olfactory recognition occurred immediately, and this sometimes led to a characteristic dominance behaviour (‘sting smearing’). The fate of 85 young workers of known age was studied: they were usually the target of aggression from either gamergates or new alphas. Their gemmae elicited attention, although these were seldom removed. A small change in the gemma pheromone apparently caused an evolutionary switch from mutilation (as occurs in the very closely related D. ceylonense) to a reversible regulation of reproduction in ‘nilgiri’.