Sex-biases in distribution and resource use at different spatial scales in a migratory shorebird.
Sex-biases in distribution and resource use at different spatial scales in a migratory shorebird.
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DOI：
10.1002/ece3.503
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发表时间：
2013-04
影响因子：
2.6
通讯作者：
Gill, Jennifer A.
中科院分区：
文献类型：
--
作者：
Alves, Jose A.;Gunnarsson, Tomas G.;Potts, Peter M.;Sutherland, William J.;Gill, Jennifer A.
在迁徙物种中，性别大小的二型性可能意味着对雄性和雌性的不同能量需求。因此，在整个范围内发生的移徙成本和环境条件的差异可能导致在不同空间尺度上的分配和资源使用方面的性别偏见。为了确定性别分离的规模，从而确定环境变化可能产生性别偏见影响的规模，我们使用范围广泛的跟踪个别有色环冰岛黑尾金龟子(Limosa Limosa Islandica)来量化从占据整个非繁殖范围的地点到地点内分布和资源使用的差异的性别分离。在这种迁徙滨鸟的整个范围内，没有证据表明在非繁殖季节在分布上存在大规模的性别差异。然而，两性在猎物类型和大小的选择上存在差异，这导致了河口内小规模的性别隔离。因此，性别隔离的规模取决于资源分配的变化规模，在这个系统中，资源分配主要在河口范围内。站点内分布和资源利用的性别隔离意味着，对河口底栖猎物群落的局部人为影响可能会对这些候鸟的性别产生不成比例的影响。
In migratory species, sexual size dimorphism can mean differing energetic requirements for males and females. Differences in the costs of migration and in the environmental conditions occurring throughout the range may therefore result in sex-biases in distribution and resource use at different spatial scales. In order to identify the scale at which sexual segregation operates, and thus the scale at which environmental changes may have sex-biased impacts, we use range-wide tracking of individually color-ringed Icelandic black-tailed godwits (Limosa limosa islandica) to quantify sexual segregation at scales ranging from the occupation of sites throughout the non-breeding range to within-site differences in distribution and resource use. Throughout the range of this migratory shorebird, there is no evidence of large-scale sex differences in distribution during the non-breeding season. However, the sexes differ in their selection of prey types and sizes, which results in small-scale sexual segregation within estuaries. The scale of sexual segregation therefore depends on the scale of variation in resource distribution, which, in this system, is primarily within estuaries. Sexual segregation in within-site distribution and resource use means that local-scale anthropogenic impacts on estuarine benthic prey communities may disproportionately affect the sexes in these migratory shorebirds.
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影响因子：
0.7
作者：
Alves, Jose A.;Lourenco, Pedro M.;Gill, Jennifer A.
通讯作者：
Gill, Jennifer A.
影响因子：
2.7
作者：
Blomqvist, D;Johansson, OC;Gotmark, F
通讯作者：
Gotmark, F
影响因子：
2.5
作者：
Blomqvist, D;Johansson, OC;Flodin, LA
通讯作者：
Flodin, LA
影响因子：
5.7
作者：
Atkinson, Philip W.;Maclean, Ilya M. D.;Clark, Nigel A.
通讯作者：
Clark, Nigel A.
影响因子：
2.4
作者：
BEUKEMA, JJ
通讯作者：
BEUKEMA, JJ