Do sibling tits (Parus major, P. caeruleus) disperse over similar distances and in similar directions?
Do sibling tits (Parus major, P. caeruleus) disperse over similar distances and in similar directions?
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兄弟山雀（Parus Major、P. caeruleus）的分散距离和方向是否相似？
DOI：
10.1007/s00442-004-1760-7
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发表时间：
2005
期刊：
影响因子：
2.7
通讯作者：
F. Adriaensen
中科院分区：
文献类型：
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作者：
E. Matthysen;T. Casteele;F. Adriaensen
我们研究了扩散运动的兄弟姐妹对大山雀，山雀，和蓝山雀，P. caeruleus，在一个斑块状的环境中，为了测试兄弟姐妹是否更相似的扩散比预期的机会。由于研究区域的异质性和有限性，可能存在共同的环境效应，因此我们将兄弟姐妹之间的相似性与每个兄弟姐妹和在同一斑块和年份中羽化的无关鸟类之间的相似性进行了比较，尽可能接近兄弟姐妹的巢。这两个物种的sibrides没有更相似的扩散距离比他们控制鸟类。然而，大山雀兄弟姐妹分散在类似的方向相比，控制鸟类，这一结果是不受兄弟姐妹和控制鸟类之间的匹配程度。结果，与对照组相比，兄弟姐妹之间的距离更近。遗传力值计算的亲子回归接近于零，这表明有没有加性遗传方差的扩散距离或扩散方向。我们建议，在传播方向的相似性起源于协会的兄弟姐妹在传播过程中或在活动中，影响方向的选择，如postfulling家庭运动。我们的研究结果表明，非独立的兄弟姐妹的扩散方向的选择可能会影响小规模的亲属结构，在这个人口与高本地招聘。
We studied dispersal movements by sibling pairs of great tits, Parus major, and blue tits, P. caeruleus, in a patchy environment, in order to test whether siblings are more similar in dispersal than expected by chance. Because of possible common environmental effects due to the heterogeneity and finiteness of the study area, we compared the similarity among siblings with the similarity between each sibling and an unrelated bird that fledged in the same patch and year, as close to the siblings’ nest as possible. Siblings of both species were not more similar in dispersal distance than they were to control birds. However, great tit siblings dispersed in similar directions compared to control birds, and this result was not affected by the degree of matching between sibling and control birds. As a consequence, siblings ended up breeding at closer distances from one another than control birds. Heritability values calculated from parent-offspring regressions were close to zero, suggesting that there is no additive genetic variance for dispersal distance or dispersal direction. We propose that similarity in dispersal direction originates from association of siblings during dispersal or during activities that influence the choice of direction, such as postfledging family movements. Our results show that non-independence in the choice of dispersal direction by siblings may influence small-scale kin structure in this population with high local recruitment.