Deep-ocean origin of the freshwater eels.
Deep-ocean origin of the freshwater eels.
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DOI：
10.1098/rsbl.2009.0989
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发表时间：
2010-06-23
期刊：
影响因子：
3.3
通讯作者：
Tsukamoto K
中科院分区：
文献类型：
--
作者：
Inoue JG;Miya M;Miller MJ;Sado T;Hanel R;Hatooka K;Aoyama J;Minegishi Y;Nishida M;Tsukamoto K
在安圭拉目的800多种鳗鱼中，只有淡水鳗鱼（安圭拉属，有16种和3个亚种）在它们的地下生命周期中大部分时间在淡水中度过。然而，由于它们的产卵区位于公海的近海，它们会迁徙回它们在海洋中特定的繁殖地，通常位于数千公里之外。然而，这种神秘行为的进化起源仍然是难以捉摸的，因为淡水鳗鱼在主要的海洋鳗类中的系统发育位置不确定。在这里，我们基于19个鳗鲡科56个物种的全线粒体基因组序列的系统发育分析，为淡水鳗的深海起源提供了强有力的证据。淡水鳗鱼在鳗类中处于顶端位置，与各种海洋中水鳗鱼形成高度支持的单系群。此外，对生长栖息地的重建结果明确表明，淡水鳗鱼起源于深海的中部水域。这与最近在太平洋中水上游收集到的成年日本鳗具有显著的一致性，表明它们在产卵区保留了它们的进化起源作为一种行为特征。
Of more than 800 species of eels of the order Anguilliformes, only freshwater eels (genus Anguilla with 16 species plus three subspecies) spend most of their lives in freshwater during their catadromous life cycle. Nevertheless, because their spawning areas are located offshore in the open ocean, they migrate back to their specific breeding places in the ocean, often located thousands of kilometres away. The evolutionary origin of such enigmatic behaviour, however, remains elusive because of the uncertain phylogenetic position of freshwater eels within the principally marine anguilliforms. Here, we show strong evidence for a deep oceanic origin of the freshwater eels, based on the phylogenetic analysis of whole mitochondrial genome sequences from 56 species representing all of the 19 anguilliform families. The freshwater eels occupy an apical position within the anguilliforms, forming a highly supported monophyletic group with various oceanic midwater eel species. Moreover, reconstruction of the growth habitats on the resulting tree unequivocally indicates an origination of the freshwater eels from the midwater of the deep ocean. This shows significant concordance with the recent collection of mature adults of the Japanese eel in the upper midwater of the Pacific, suggesting that they have retained their evolutionary origin as a behavioural trait in their spawning areas.
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影响因子：
1.6
作者：
Aoyama, J;Wouthuyzen, S;Tsukamoto, K
通讯作者：
Tsukamoto, K
影响因子：
3
作者：
Bollback JP
通讯作者：
Bollback JP
影响因子：
1.9
作者：
Chow, Seinen;Kurogi, Hiroaki;Tsukamoto, Katsumi
通讯作者：
Tsukamoto, Katsumi
影响因子：
56.9
作者：
GROSS, MR;COLEMAN, RM;MCDOWALL, RM
通讯作者：
MCDOWALL, RM
影响因子：
64.8
作者：
TSUKAMOTO, K
通讯作者：
TSUKAMOTO, K