Social relationships and reproductive state influence leadership roles in movements of plains zebra, Equus burchellii
Social relationships and reproductive state influence leadership roles in movements of plains zebra, Equus burchellii
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DOI：
10.1016/j.anbehav.2006.10.012
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发表时间：
2007-05-01
期刊：
影响因子：
2.5
通讯作者：
Rubenstein, Daniel I.
中科院分区：
文献类型：
--
作者：
Fischhoff, Ilya R.;Sundaresan, Siva R.;Rubenstein, Daniel I.
在动物群体中，集体运动源于个体之间的相互作用。生物学家试图确定这些群体中行为者的特征及其关系如何影响决策过程。我们区分了两个基本因素，决定领导群体的选择：身份和状态。我们假设，在关系稳定的群体中，身份对于领导力更重要，这允许习惯性角色的发展。在成员流动的群体中，特定的个人或小组不太可能成为始终如一的领导者。相反，我们预测，在不稳定的群体运动的启动取决于个人状态的决定。我们的特点是身份和生殖状态如何影响领导模式的运动平原斑马，在许多其他哺乳动物，哺乳在这个物种显着改变水和能量的需求。我们调查了紧密结合的后宫和松散结合的多个后宫群体的领导力。后宫女性在后宫运动的发起中往往具有习惯性的角色。然而，在鹿群中，我们发现在后宫中没有一致的领导者。在社会组织的两个层面上，哺乳都是决定领导力的关键因素。在后宫，哺乳期的女性更容易发起运动比非哺乳期的女性。反过来，含有哺乳期女性的后宫更有可能导致牛群运动。因此，我们的结论是，社会关系和生殖状态一起塑造的互动，产生群体行为。领导牛群运动的哺乳期雌性的一个好处是优先获得稀缺的水。因此，在群体决策中的领导角色可能会产生适应性后果。(C)2007年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
In animal groups, collective movements emerge from individual interactions. Biologists seek to identify how characteristics of actors in these groups, and their relationships, influence the decision-making process. We distinguished two basic factors determining leadership in group choices: identity and state. We hypothesized that identity is more important to leadership in groups with stable relationships, which permit the development of habitual roles. In groups with fluid membership, particular individuals or subgroups are less likely to emerge as consistent leaders. Instead, we predicted that movement initiation in unstable groups depends on individual state at the time of the decision. We, characterized how identity and reproductive state influenced leadership patterns in the movements of plains zebra, As in many other mammals, lactation in this species significantly alters water and energy needs. We investigated leadership in tightly knit harems and loosely bonded herds of multiple harems. Harem females tended to have habitual roles in the initiation of harem movement. In herds, however, we found no consistent leaders among harems. At both levels of social organization, lactation was a key determinant of leadership. In harems, lactating females were more likely to initiate movement than nonlactating females. In turn, harems containing lactating females were more likely to lead herd movements. Thus, we conclude that social relationships and reproductive state together shape the interactions that produce group behaviours. One benefit to lactating females of leading herd movements is preferential access to scarce water. Thus, leadership roles in group decisions may have fitness consequences. (C) 2007 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.