He Wei, Lu Wei-Hua, Li Xi-Guo, Lu Ning-Ning, Sun Dong-Fang, Li Yong-Zheng
The Supervising Station of Bahaba Nature Reserve in Dongguan City in China, Dongguan, Guangdong, P.R. China.
Mitochondrial DNA. 2012 Apr;23(2):53-61. doi: 10.3109/19401736.2011.653797. Epub 2012 Mar 7.
Sciaenidae is one of the largest fish families, but the phylogeny and taxonomy of these fishes are still being disputed. Furthermore, the taxonomic status of the Chinese bahaba (Bahaba taipingensis), which is an endemic species to China, had never been studied through molecular method. In this study, phylogenetic relationships among sciaenid species were reconstructed using DNA sequence data from the mitochondrial cytochrome b (cyt b) gene and the 16S ribosomal RNA (16S rRNA) gene through Bayesian inference (BI) analyses. The phylogenetic trees indicated that the Chinese bahaba closely related to Collichthys and Pseudosciaena. Previous studies (Meng et al. 2004. Prog Nat Sci 14(5):514-521, [in Chinese]) showed that the subfamily Pseudosciaeninae represented the latest evolutionary sort, which was more suitable with the current environment. Based on our 16S rRNA, the Chinese bahaba showed close relationship with Pseudosciaena, thus the divergence of the Chinese bahaba maybe also very late within the family Sciaenidae. It was probably that the oceanographic or ecological discontinuities of these species vary considerably causing particularly strong breaks. Furthermore, combined with previous studies, we suggested that there was only one genus, Otolithes, within the subfamily Otolithinae. Nevertheless, the taxonomic status of the Chinese bahaba and the phylogeny of the whole family were not completely solved. Additional samples of more species are required to develop a clearer picture of the evolutionary history of Sciaenidae.
石首鱼科是最大的鱼类家族之一，但这些鱼类的系统发育和分类仍存在争议。此外，中国的特有物种——中华鲟（Bahaba taipingensis）的分类地位从未通过分子方法进行过研究。在本研究中，利用线粒体细胞色素b（cyt b）基因和16S核糖体RNA（16S rRNA）基因的DNA序列数据，通过贝叶斯推断（BI）分析重建了石首鱼科物种之间的系统发育关系。系统发育树表明，中华鲟与黄姑鱼属和真鲷属密切相关。先前的研究（Meng等人，2004年。《自然科学进展》14(5):514 - 521，[中文]）表明，真鲷亚科代表了最新的进化分类，更适应当前环境。基于我们的16S rRNA研究，中华鲟与真鲷属关系密切，因此中华鲟在石首鱼科内的分化可能也非常晚。可能是这些物种的海洋学或生态间断差异很大，导致了特别强烈的分化。此外，结合先前的研究，我们认为耳石亚科内只有一个属，即耳石属。然而，中华鲟的分类地位和整个家族的系统发育尚未完全解决。需要更多物种的额外样本，以更清楚地了解石首鱼科的进化历史。
