Barth Julia M I, Damerau Malte, Matschiner Michael, Jentoft Sissel, Hanel Reinhold
Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, Oslo, Norway.
Institute of Fisheries Ecology, Johann Heinrich von Thünen Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries, Hamburg, Germany.
Genome Biol Evol. 2017 Apr 1;9(4):1084-1098. doi: 10.1093/gbe/evx067.
Recent developments in the field of genomics have provided new and powerful insights into population structure and dynamics that are essential for the conservation of biological diversity. As a commercially highly valuable species, the yellowfin tuna (Thunnus albacares) is intensely exploited throughout its distribution in tropical oceans around the world, and is currently classified as near threatened. However, conservation efforts for this species have so far been hampered by limited knowledge of its population structure, due to incongruent results of previous investigations. Here, we use whole-genome sequencing in concert with a draft genome assembly to decipher the global population structure of the yellowfin tuna, and to investigate its demographic history. We detect significant differentiation of Atlantic and Indo-Pacific yellowfin tuna populations as well as the possibility of a third diverged yellowfin tuna group in the Arabian Sea. We further observe evidence for past population expansion as well as asymmetric gene flow from the Indo-Pacific to the Atlantic.
基因组学领域的最新进展为种群结构和动态提供了全新且强大的见解，这些见解对于生物多样性保护至关重要。黄鳍金枪鱼（Thunnus albacares）作为具有高度商业价值的物种，在全球热带海洋的分布范围内遭到过度捕捞，目前被列为近危物种。然而，由于先前调查结果不一致，对该物种的保护工作迄今因对其种群结构了解有限而受阻。在此，我们结合全基因组测序和基因组草图组装来解读黄鳍金枪鱼的全球种群结构，并探究其种群历史。我们检测到大西洋和印度洋-太平洋黄鳍金枪鱼种群存在显著分化，以及在阿拉伯海可能存在第三个分化的黄鳍金枪鱼群体。我们还进一步观察到过去种群扩张的证据以及从印度洋-太平洋到大西洋的不对称基因流。
