...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biological Journal of the Linnean Society >Genetic and morphological evidence for reproductive isolation betweensympatric populations of Galaxias (Teleostei : Galaxiidae) in SouthIsland, New Zealand
【24h】

Genetic and morphological evidence for reproductive isolation betweensympatric populations of Galaxias (Teleostei : Galaxiidae) in SouthIsland, New Zealand

机译：新西兰南岛的星系（Teleostei：Galaidaidae）同胞种群之间生殖隔离的遗传和形态学证据

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New Zealand's South Island houses a nock of closely related stream-resident fish taxa (Galaxias vulgaris sensu lato), including a number of species recently described on the basis of subtle morphological differences. The taxonomic status of some members of the species complex remains uncertain. This study examines the degree of reproductive isolation between recently recognized morphotypes from Southland (G. 'southern', flatheads; G. gollumoides, roundheads) which co-occur in Bushy Creek, a tributary of the Mataura R. Although these morphotypes are broadly sympatric in Southland and Stewart Island, Bushy Creek is their only documented zone of contact. Molecular (microsatellite, isozyme and mtDNA markers) and morphological analyses of 139 fish samples across a 500-m transect (seven stations) reveal a dine from predominantly G. 'southern' (N=85) to predominantly G. gollumoides (N=54), corresponding with a gradual increase in stream gradient. Multivariate analyses of genotypic and morphological data independently reveal distinct clusters that are completely congruent with mtDNA type, suggesting an absence of mtDNA introgression. Our data support the separate species status of G. 'southern' and G. gollumoides under both biological and phylogenetic species concepts. We suggest that the speciation of these taxa occurred in allopatry through independent losses of diadromy, with sympatry resulting from secondary contact.
机译：新西兰的南岛有一个紧密相连的溪流鱼类分类群（Galaxias vulgaris sensu lato），其中包括一些最近在形态上有所差异的物种。该物种复合体某些成员的分类学地位仍然不确定。这项研究研究了在Mataura R的支流Bushy Creek上同时发生的，来自南国的最近确认的形态型（G.'southern'，扁平头; G。gollumoides，圆头）之间的生殖隔离程度。尽管这些形态型广泛地同伴在南国和斯图尔特岛，灌木丛溪是他们唯一的记录接触区域。分子（微卫星，同工酶和mtDNA标记）和跨500米横断面（七个站）的139条鱼样品的形态学分析揭示了从主要G.'southern'（N = 85）到主要G. gollumoides（N = 54）的一餐。 ），相应于流量梯度逐渐增加。基因型和形态学数据的多变量分析独立地揭示了与mtDNA类型完全一致的不同簇，表明没有mtDNA渗入。我们的数据在生物学和系统发育物种概念下都支持G.'southern'和G. gollumoides的单独物种状态。我们建议这些类群的形态发生在异位症中，是通过单独失去了透皮作用而引起的，其次生接触引起了共生。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号