Predictors of nest growth: diminishing returns for subordinates in the paper wasp Polistes dominula.
Predictors of nest growth: diminishing returns for subordinates in the paper wasp Polistes dominula.
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DOI：
10.1007/s00265-018-2502-x
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发表时间：
2018
影响因子：
2.3
通讯作者：
Field J
中科院分区：
文献类型：
--
作者：
Grinsted L;Field J
在合作育种者，下属有替代生殖选择，预计留下来，帮助占主导地位的育种者，只要他们有助于群体生产力，如果他们的健身与殖民地的成功。雌蜂生活在通常少于10只雌性的小群体中，作为合作繁殖者。下属往往有高质量的外部选择，因此，如果他们的工作努力提高生产力微不足道，他们可以选择替代育种策略。在工人出现之前的创始阶段，我们测试了各种预测因素对巢增长的影响，作为群体生产力的代理，并探讨了群体大小和巢增长之间关系的形状。我们发现组大小是唯一显着的预测巢增长：组内的身体大小之间的变化没有显示出任何效果，这表明在这个物种中缺乏大小依赖的任务专业化。群体成员之间的平均体型和平均遗传相关性同样对巢的生长没有影响。组大小有一个非线性的影响，使人均收益巢增长下降，在较大的群体，10个或更多的群体将受益于额外的组成员可以忽略不计。因此，女性最好选择其他选择，而不是加入一个大团体。这一发现有助于解释为什么P. dominula群体在我们的研究人群中通常相对较小。进一步的研究可能会阐明我们在较大群体中发现的人均巢穴增长较小背后的机制。确定哪些因素影响动物群体的生产力是理解为什么不同物种在不同规模的群体中合作繁殖的关键。在论文中，我们调查了蜂巢的增长率作为衡量群体生产力的指标。我们发现，平均身体大小，群体内身体大小的变化，以及群体成员之间的平均遗传相关性并不影响巢穴的生长，而群体大小有很强的积极影响：随着群体成员的增加，巢穴生长得更快，但在较大的群体中，人均收益下降。在10个或更多的组中添加额外的组成员对巢的生长影响可以忽略不计。因此，黄蜂可能会更好地追求其他选择，而不是加入大群体。这一发现有助于解释为什么在这个种群中，群体通常由少于10只黄蜂组成。本文的在线版本（10.1007/s 00265 -018-2502-x）包含补充材料，可供授权用户使用。
In cooperative breeders, subordinates that have alternative reproductive options are expected to stay and help dominant breeders only as long as they contribute to group productivity, if their fitness is linked with colony success. Female Polistes dominula paper wasps live as cooperative breeders in small groups of typically fewer than 10 females. Subordinates tend to have high-quality outside options, and so could choose alternative breeding tactics if their work efforts increased productivity negligibly. In the founding stage before workers emerge, we tested the effect of various predictors on nest growth, as a proxy for group productivity, and explored the shape of the relationship between group size and nest growth. We found group size to be the only significant predictor of nest growth: variation among body sizes within the group showed no effect, suggesting a lack of size-dependent task specialization in this species. Average body size and average genetic relatedness between group members similarly showed no effects on nest growth. Group size had a non-linear effect so that per-capita benefits to nest growth decreased in larger groups, and groups of 10 or more would benefit negligibly from additional group members. Hence, females might be better off pursuing other options than joining a large group. This finding helps to explain why P. dominula groups are usually relatively small in our study population. Further studies may illuminate the mechanisms behind the smaller per-capita nest growth that we found in larger groups. Identifying which factors influence the productivity of animal groups is key to understanding why different species breed cooperatively in groups of varying sizes. In the paper wasp Polistes dominula, we investigated the growth rate of nests as a measure of group productivity. We found that average body size, the variation in body sizes within the group, and average genetic relatedness between group members did not affect nest growth, while group size had a strong, positive effect: nests grew faster with more group members, but the per-capita benefit decreased in larger groups. The addition of extra group members in groups of 10 or more had negligible effects on nest growth. Hence, wasps may be better off pursuing other options than joining large groups. This finding helps to explain why groups normally consist of fewer than 10 wasps in this population. The online version of this article (10.1007/s00265-018-2502-x) contains supplementary material, which is available to authorized users.
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影响因子：
4.9
作者：
Henshaw, MT
通讯作者：
Henshaw, MT
影响因子：
16.6
作者：
Grinsted L;Field J
通讯作者：
Field J
影响因子：
2.9
作者：
Cant, Michael A.;Llop, Justine B.;Field, Jeremy
通讯作者：
Field, Jeremy
影响因子：
2
作者：
HAMILTON, WD
通讯作者：
HAMILTON, WD
DOI：
10.1098/rspb.2013.1407
发表时间：
2013-09-22
影响因子：
4.7
作者：
Grinsted, Lena;Pruitt, Jonathan N.;Bilde, Trine
通讯作者：
Bilde, Trine