LIMITED DISPERSAL AND PROXIMITY-DEPENDENT MATING SUCCESS IN THE COLONIAL ASCIDIAN BOTRYLLUS-SCHLOSSERI
LIMITED DISPERSAL AND PROXIMITY-DEPENDENT MATING SUCCESS IN THE COLONIAL ASCIDIAN BOTRYLLUS-SCHLOSSERI
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DOI：
10.1111/j.1558-5646.1987.tb05804.x
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发表时间：
1987-03-01
期刊：
影响因子：
3.3
通讯作者：
GROSBERG, RK
中科院分区：
文献类型：
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作者：
GROSBERG, RK
虽然许多固着生物的繁殖体具有远距离扩散的能力，但扩散往往受到空间的限制。在本文中，我的文件，结合使用标记/重捕技术和组织相容性测定，无柄，殖民海鞘Botryllus schlosseri的寄生幼虫的传播距离。这两种方法都表明，大多数幼虫都停留在距离出生地一米的范围内。这种有限的分散应该会导致亲属之间交配的增加，并可能导致近亲繁殖衰退。然而，随着交配群体之间距离的增加，1）受精，2）胚胎发生和3）幼虫变态的成功率都降低。这种减少交配成功发生的空间尺度是一致的传播距离估计的基础上的幼虫标记/再捕获数据和组织相容性试验。综上所述，这些结果意味着近交衰退不是B中有限扩散和近亲交配的必然结果。施洛塞里。
Although the propagules of many sessile organisms have the capacity to disperse over large distances, dispersal is often spatially restricted. In this paper, I document, using a combination of mark/recapture techniques and histocompatibility assays, dispersal distance of the planktonic larvae of the sessile, colonial sea squirt Botryllus schlosseri. Both of these methods indicate that most larvae remain within a meter of their birthplace. Such limited dispersal should lead to increased matings among relatives, and the potential for inbreeding depression. However, the success of: 1) fertilization, 2) embryogenesis, and 3) larval metamorphosis all decrease as distance between mated colonies increases. The spatial scale over which this decrease in mating success occurs is concordant with the estimates of dispersal distance based on the larval mark/recapture data and histocompatibility assays. Taken together, these results imply that inbreeding depression is not a necessary consequence of limited dispersal and consanguineous matings in B. schlosseri.