Golani Daniel, Azzurro Ernesto, Corsini-Foka Maria, Falautano Manuela, Andaloro Franco, Bernardi Giacomo
Department of Evolution, Systematics and Ecology, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel.
Biol Lett. 2007 Oct 22;3(5):541-5. doi: 10.1098/rsbl.2007.0308.
Our current understanding of the mechanisms that lead to successful biological invasions is limited. Although adaptations play a central role in biological invasions, genetic studies have so far failed to produce a unified theory. The bluespotted cornetfish, a recent Red Sea invader in the Mediterranean Sea via the Suez Canal, provides an ideal case study for research in the mechanisms of invasive genetics. In this study, we show that the invading bluespotted cornetfish underwent a severe population bottleneck that reduced the genetic diversity of this immigrant to only two mitochondrial haplotypes. Although loss of genetic diversity is considered detrimental to the need to adapt to new environments, bluespotted cornetfish experienced an unprecedented success and rapid spread across the Mediterranean.
我们目前对导致生物入侵成功的机制的理解有限。尽管适应性在生物入侵中起着核心作用，但迄今为止，遗传学研究尚未得出统一的理论。蓝斑管鼻鱼是最近通过苏伊士运河入侵地中海的红海物种，为入侵遗传学机制的研究提供了一个理想的案例。在本研究中，我们表明，入侵的蓝斑管鼻鱼经历了严重的种群瓶颈，这使得这个外来物种的遗传多样性仅减少到两种线粒体单倍型。尽管遗传多样性的丧失被认为不利于适应新环境的需求，但蓝斑管鼻鱼却取得了前所未有的成功，并在地中海迅速扩散。
