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首页> 外文期刊>Ichthyological Exploration of Freshwaters >Larval attachment organs in six species of ostariophysan teleosts
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Larval attachment organs in six species of ostariophysan teleosts

机译：幼虫附着器官在六种骨骨血掌紧邻

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摘要

Attachment organs are predominantly known from larval stages of freshwater fishes and are used to attach to various substrates. They are functional upon hatching for a few days and usually disappear when the yolk sac is resorbed and the larvae are free swimming in the water column. Attachment organs are reported for the first time in a representative of the Gonorynchiformes (Anotophysi), the African freshwater fish Kneria sp., which has a single median, multicellular organ (Ilg's type II) at the front of the head. Larvae of the two southern Asian cyprinid species studied here, Devario cf. regina and Pethia padamya, have very different attachment organs. That in Devario resembles the attachment organ in Kneria, but that of Pethia is much less definedand consists of many scattered cells concentrated on the front and snout area of the head (Ilg's type I). Larval Pethia have numerous ciliated cells in the epidermis of their eyes, the only teleost with this feature. Ciliated epidermal cells are otherwise known from larvae of non-teleostean actinopterygians, dipnoans and amphibians.Attachment organs in the larvae of the three characiforms differ in their position and structure. The South American Ctenolucius has double multicellular attachment organs (type II), one situated on top of the head, the other posteriorly in the dorsal midline on the trunk at the end of the abdominal region. The single, multicellular larval attachment organ of the South American Pyrrhulina (type II) has an unusual saddle-like shape and is situated on the posterior most part of its head. Larvae of the West African Rhabdalestes lack a discrete organ, but have numerous individual attachment cells (type I) at the front of their heads.
机译：附着器官主要从淡水鱼的幼虫阶段众所周知，并且用于附着在各种基材上。它们在孵化时是功能性的几天，当蛋黄囊被吸收时通常消失，幼虫在水柱中自由游泳。在非洲淡水鱼kneria sp的代表中首次报告附着器官，该代表是非洲淡水鱼kneria sp。，在头部的前部具有单个中值，多细胞器官（Ilg II型）。这里研究了两种南方亚洲鲤鱼种类的幼虫，Devario CF。 Regina和Pathia Padamya，具有非常不同的附件器官。在Devario中，在膝盖的附着器官类似，但椎间切菊酯的含义较少得多，而且由许多散射细胞组成，浓缩在头部的前部和鼻子区域（ILG类型I）上。幼虫椎间素在他们眼中的表皮中有许多纤毛细胞，这一特征的唯一远程电影。纤毛的表皮细胞在非Textostean Intinopterygians的幼虫中熟知，钛合体和两栖动物。三个Characifors的幼虫中的Actachment器官在其位置和结构中不同。南美北林斯图斯有双重多细胞附件器官（II型），一个位于头部的顶部，另一个在腹部末端的躯干上的背部中线后面。南美帕尔列纳（II型）的单个多细胞幼虫附着器官具有不寻常的马鞍形状，位于其头部的大部分后部。西非rhabdalestes的幼虫缺乏一个离散器官，但在头部前面有许多单独的附着细胞（I型）。

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