Identification of Leptocephali Representing Four Muraenid Species from the Western North Pacific, Based on Morphometric and Mitochondrial DNA Sequence Analyses
Identification of Leptocephali Representing Four Muraenid Species from the Western North Pacific, Based on Morphometric and Mitochondrial DNA Sequence Analyses
复制标题
基于形态测量和线粒体 DNA 序列分析，鉴定北太平洋西部代表四种穆拉尼德物种的薄头类
DOI：
10.5343/bms.2012.1010
复制
发表时间：
2013
影响因子：
1.5
通讯作者：
N. Mochioka
中科院分区：
文献类型：
--
作者：
A. Tawa;M. Kobayakawa;T. Yoshimura;N. Mochioka
根据形态测量和线粒体DNA序列分析，从北太平洋西部采集的细头裸胸鱼（Leptocephalus）的幼体被鉴定为Buroensis（Bleeker，1857）、Gymnothorax Eustus（Abbott，1860）和Gymnothorax pseudothyrsoideus（Bleeker，1853）。幼虫的特征分别为110 - 115、125 - 128、124 - 128和128 - 134个总肌节; 63 - 67、77 - 78、64 - 67和80 - 83个肛前肌节，以及56 - 60、67 - 68、59 - 66和73 - 74个最后垂直血管肌节。前三种的黑色素细胞模式相同，即眼前和眼后有一组水平伸长的相对较大和/或较小的不规则黑色素细胞。在头和脑的背面也有类似的黑色素细胞。与其他种类不同，G. pseudothyrsoideus有微小的黑色素细胞分布在头部和身体的大部分。的leptocephalus幼虫的诊断形态特征描述的四个裸胸种，这些字符可能使物种水平的鉴定，而无需DNA分析。
Leptocephalus larvae collected from the western North Pacific Ocean were identified as Gymnothorax buroensis (Bleeker, 1857), Gymnothorax meleagris (Show, 1795), Gymnothorax eurostus (Abbott, 1860), and Gymnothorax pseudothyrsoideus (Bleeker, 1853) on the basis of morphometric and mitochondrial DNA sequence analyses. The larvae were characterized respectively by counts of 110-115, 125-128, 124-128, and 128-134 total myomeres; 63-67, 77-78, 64-67, and 80-83 preanal myomeres, and 56-60, 67-68, 59-66, and 73-74 last vertical blood vessel myomeres. The first three species share a common melanophore pattern of a horizontally elongate group of relatively large and/or small irregular melanophores before and behind the eye, with the larvae of G. buroensis also having similar melanophores on the dorsal surface of the head and brain. Unlike the other species, larvae of G. pseudothyrsoideus had minute melanophores distributed over much of the head and body. Diagnostic morphological characters of the leptocephalus larvae were described for the four Gymnothorax species; these characters may enable species level identifications without DNA analysis.