Neuropeptide binding reflects convergent and divergent evolution in species-typical group sizes
Neuropeptide binding reflects convergent and divergent evolution in species-typical group sizes
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DOI：
10.1016/j.yhbeh.2006.03.005
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发表时间：
2006-08-01
影响因子：
3.5
通讯作者：
Wang, Y.
中科院分区：
文献类型：
--
作者：
Goodson, James L.;Evans, Andrew K.;Wang, Y.
在聚集行为(“社会性”)中产生物种差异的神经内分泌因素在很大程度上是未知的，尽管相关研究应该会对联系和社会进化的机制产生重要的见解。在这里，我们集中于雌虫科的五种鸟类，它们在物种上有选择地不同--典型的群体大小(所有物种都是一夫一妻制的，栖息地相似)。这些物种包括独立进化为殖民地的两个高度群居的物种；独立进化为属地的两个地域性物种；以及一个中间的、适度群居的物种，它是一个地域性物种的同域同类。在每一物种的雄性和雌性动物中，我们检测了I-125-血管活性肠肽(VIP)、I-125-苏维因(SG，促肾上腺皮质激素释放因子受体的配体)和线性(IV1a)-I-125加压素拮抗剂(用于定位血管催产素受体，VT)的结合部位。VIP、CRF和VT是影响应激、焦虑和/或各种社会行为的神经肽。对于许多区域(特别是隔膜复合体内)，领土物种的结合密度与较多群居物种的结合密度有很大不同，在大多数情况下，中等群居物种的结合密度要么与两个殖民地物种相当，要么介于领土和殖民地物种之间。I-125-VIP结合在终纹内侧床核、内侧隔、隔-海马隔和外侧隔的苍白球下区，I-125-SG在漏斗状下丘脑和下丘脑腹内侧区的外侧和内侧区，I-125-V-1a的线性拮抗剂在内侧隔和尾侧外侧隔的皮质和苍白球下区观察到。除漏斗状下丘脑I-125-SG结合外，结合密度与社会性呈正相关。(C)2006 Elsevier Inc.保留所有比赛。
Neuroendocrine factors that produce species differences in aggregation behavior ("sociality") are largely unknown, although relevant studies should yield important insights into mechanisms of affiliation and social evolution. We here focused on five species in the avian family Estrildidae that differ selectively in their species-typical group sizes (all species are monogamous and occupy similar habitats). These include two highly gregarious species that independently evolved coloniality; two territorial species that independently evolved territoriality;, and an intermediate, modestly gregarious species that is a sympatric congener of one of the territorial species. Using males and females of each species, we examined binding sites for I-125-vasoactive intestinal polypeptide (VIP), I-125-sauvagine (SG; a ligand for corticotropin releasing factor, CRF, receptors) and a linear (IV1a)-I-125 vasopressin antagonist (to localize receptors for vasotocin, VT). VIP, CRF and VT are neuropeptides that influence stress, anxiety and/or various social behaviors. For numerous areas (particularly within the septal complex), binding densities in the territorial species differed significantly from binding in the more gregarious species, and in most of these cases, binding densities for the moderately gregarious species were either comparable to the two colonial species or were intermediate to the territorial and colonial species. Such patterns were observed for I-125-VIP binding in the medial bed nucleus of the stria terminalis, medial septum, septohippocampal septum, and subpallial zones of the lateral septum; for I-125-SG binding in the infundibular hypothalamus, and lateral and medial divisions of the ventromedial hypothalamus; and for the linear I-125-V-1a antagonist in the medial septum, and the pallial and subpallial zones of the caudal lateral septum. With the exception of I-125-SG binding in the infundibular hypothalamus, binding densitites are positively related to sociality. (c) 2006 Elsevier Inc. All fights reserved.