Cryptic competition from neighbours significantly reduces intake rate of foraging greater white-fronted geese
Cryptic competition from neighbours significantly reduces intake rate of foraging greater white-fronted geese
复制标题
来自邻居的隐性竞争显着降低了觅食大白额雁的摄入率
DOI：
10.1016/j.anbehav.2020.07.011
复制
发表时间：
2020-09
期刊：
影响因子：
2.5
通讯作者：
Li-Zhi Zhou
中科院分区：
文献类型：
--
作者：
Jin-Ming Zhao;Nan Lyu;Wenda Cheng;Li-Zhi Zhou
亮点的邻居导致觅食时间和觅食效率的减少。邻居之间的竞争降低了个体的摄入率。在许多研究中，在大型研究中报道了动物在较大群体中获得更高的食物摄入率时，在影响摄入量的情况下，邻居的摄入率比羊群的大小更为重要。但是，一些研究表明，监视的邻居数量可能比羊群大小在影响食物摄入率方面起着更重要的作用。另外，邻居数量的影响也应取决于羊群中个体的位置。为了检验这些假设，我们检查了羊群大小，邻居数量和羊群中植物的姿势的影响，对觅食时间，觅食效率和越冬的较大白色灰色鹅，Anser Alser albifrons的影响。我们观察到2016年12月至2017年3月3日在中国安岛的Shengjin Lake的71家羊群的490种鹅的觅食行为。我们发现，平均觅食时间，觅食效率和摄入率不受羊群大小的影响，而在单个尺度上，这些变量受到邻居数量和羊群内的位置的显着影响。此外，尽管中央个体总是有更大的觅食时间，觅食效率和摄入率，但邻居人数对觅食参数的影响并没有差异。觅食时间的减少和觅食效率的下降都表明，邻居的隐性竞争可能会增加。越来越多的邻居导致摄入率降低。我们的研究强调了邻居之间神秘竞争对他们的觅食行为的可能影响。我们假设，湿地栖息地萎缩地区邻居之间种内竞争的增加可能导致越冬的鹅和其他野禽的人口下降。
HighlightsMore neighbours lead to decreased foraging time and foraging efficiency.Cryptic competition among neighbours reduces individuals' intake rate.Number of neighbours is more important in affecting intake rate than flock size.The idea that animals gain a higher food intake rate when foraging in larger groups has been reported in many studies. However, some studies suggested that the number of neighbours under surveillance may play a more important role in affecting food intake rate than flock size. In addition, the effect of the number of neighbours should also depend on the position of an individual within a flock. To test these hypotheses, we examined the effects of flock size, number of neighbours and position within a flock on foraging time, foraging efficiency and intake rate of wintering greater white-fronted geese, Anser albifrons. We observed the foraging behaviours of 490 individual geese from 71 flocks during December 2016–March 2017 at Shengjin Lake, Anhui, China. We found that mean foraging time, foraging efficiency and intake rate were not influenced by flock size, whereas, at the individual scale these variables were significantly affected by the number of neighbours and position within a flock. Moreover, the effect of the number of neighbours on the foraging parameters did not differ between central and peripheral individuals, despite central individuals always having greater foraging time, foraging efficiency and intake rate regardless of the number of neighbours. Both the decreased foraging time and decreased foraging efficiency indicated a potential increase in cryptic competition from neighbours. More neighbours contributed to a decreased intake rate. Our study highlights the possible effects of cryptic competition among neighbours on their foraging behaviour. We hypothesize that an increase in intraspecific competition between neighbours in areas of shrinking wetland habitats may contribute to population declines of wintering geese and other wildfowl.
登录
查看更多内容
DOI：
10.1098/rspb.2005.3353
发表时间：
2006-03
期刊：
Proceedings of the Royal Society B: Biological Sciences
影响因子：
--
作者：
C. Rutz;M. Whittingham;I. Newton
通讯作者：
C. Rutz;M. Whittingham;I. Newton
食物丰度和干扰对越冬白头鹤 (Grus monacha) 觅食群体模式的影响
影响因子：
1.8
作者：
Ling Yang;Lizhi Zhou;Yunwei Song
通讯作者：
Yunwei Song
影响因子：
2.5
作者：
Butler, Shannon R.;Hosinski, Elizabeth C.;Fernandez-Juricic, Esteban
通讯作者：
Fernandez-Juricic, Esteban
影响因子：
2.3
作者：
K. Kotrschal;Josef Hemetsberger;J. Dittami
通讯作者：
K. Kotrschal;Josef Hemetsberger;J. Dittami
影响因子：
1.7
作者：
I. Inglis;J. Lazarus
通讯作者：
I. Inglis;J. Lazarus