Dipartimento di Biologia, Sezione di Zoologia e Citologia, Università degli Studi di Milano, Via Celoria, 26, 20133 Milan, Italy.
C R Biol. 2010 Mar;333(3):255-64. doi: 10.1016/j.crvi.2009.11.014. Epub 2010 Jan 20.
The position of the emerging point has rarely been investigated as a factor possibly affecting the future nest settlement behaviour in Hymenoptera, in particular within nest aggregations. We studied the emergence and dispersion patterns of the digger wasp Stizus continuus. Individuals emerged daily in clumped patterns, possibly revealing a certain synchrony of emergence from the same nests, and protandry appeared both at seasonal and daily level. Differences between the number of females that nested relatively close or far from their emergence holes (EH) were either significant or not, depending on the year, and observed dispersal distances from the natal nests did not differ from those obtained by random simulations. By contrast, females nested close to the nearest conspecific nest. Size did not affect the dispersion patterns. EH are thus not important cues for nest establishment, and conspecific nests are probably the key cue for nest-founding females. In addition, males did not prefer to establish territories close to their natal nest.
新兴点的位置很少被作为可能影响膜翅目（特别是在巢群中）未来巢居行为的因素进行研究。我们研究了掘土蜂 Stizus continuus 的出蜂和扩散模式。个体以聚集的模式每天出现，可能揭示了从同一巢中出蜂的某种同步性，并且在季节性和日常水平上都出现了雌雄先熟现象。在同一年，巢相对靠近或远离其出蜂孔 (EH) 的雌蜂数量的差异要么显著，要么不显著，而从原生巢的观察到的扩散距离与随机模拟得到的结果没有差异。相比之下，雌蜂会在靠近最近同种巢的地方筑巢。体型大小并不影响扩散模式。因此，EH 并不是建立巢穴的重要线索，而同种巢可能是巢居筑巢雌蜂的关键线索。此外，雄蜂并不喜欢在靠近其原生巢的地方建立领地。
