The trunk lateral line system and its innervation in Mugil cephalus (Mugilidae: Mugiliformes)

The trunk lateral line system and its innervation in Mugil cephalus (Mugilidae: Mugiliformes)
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鲦鱼的躯干侧线系统及其神经支配(鲦科:鲦形目)

DOI:
10.1007/s10228-014-0433-8
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发表时间:
2015
影响因子:
1.2
通讯作者:
Kunio Sasaki
Kunio Sasaki
中科院分区:
生物学4区
文献类型:
--
作者:
Yusuke Ishida;Ryu Asaoka;Masanori Nakae;Kunio Sasaki

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本文对头mugil的躯干侧线系统及其神经支配进行了研究。几乎每个鳞片都有一个开放的纵向凹槽,凹槽内嵌有一个浅表神经杆(SN), SN总数为550个(包括尾鳍上的55个)。槽状侧线鳞片构成14纵行(14条侧线),虽然每个槽是独立的,但没有沿着相邻鳞片形成连续的公共槽。后侧线神经外侧支有4个特征性小束:最前面的2个背小束向后伸展,支配躯干背表面的SNs;最前面的腹侧小规广泛分叉,支配前翼的SNs,在胸鳍基部的前方腹侧通过;第五腹小规向后延伸,靠近肛鳍起源,支配中腹腹一半的SNs。除尾鳍外,其余的SNs由29个背小丘、33个外侧小丘和25个腹侧小丘支配。神经支配模式显示,第6侧线(从最上面开始)与硬骨鱼的典型侧线同源,其他的被认为是附加的。第六侧线前退,表明胸鳍在躯干上的高位插入是继发性疾病。
The trunk lateral line system and its innervation were examined inMugil cephalus. Almost every scale had an open longitudinal groove that housed a superficial neuromast (SN), the total number of SNs being 550 (including 55 on the caudal fin). Grooved lateral line scales constituted 14 longitudinal rows (14 lateral lines), although each groove was independent, not forming a continuous common groove along adjacent scales. The lateral ramus of the posterior lateral line nerve gave off four characteristic ramules: the anteriormost two dorsal ramules extended strongly backward, innervating SNs on the dorsal surface of the trunk; the anteriormost ventral ramule was extensively ramified to innervate SNs on the anterior flank, passing ventrally in front of the pectoral fin base; and the fifth ventral ramule extended posteriorly close to the anal fin origin, innervating SNs on the ventral half of the middle flank. The remaining SNs were innervated by 29 dorsal, 33 lateral and 25 ventral ramules, excepting those on the caudal fin. The innervation pattern revealed that the sixth lateral line (from uppermost) was homologous with that typically found in teleosts, the others being considered as additional. The sixth lateral line was anteriorly regressive, suggesting that the high insertion of the pectoral fin on the trunk is a secondary condition.
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