Ontogeny of the osteocranium in the African catfish, Clarias gariepinus Burchell (1822) (Siluriformes: Clariidae): Ossification sequence as a response to functional demands
Ontogeny of the osteocranium in the African catfish, Clarias gariepinus Burchell (1822) (Siluriformes: Clariidae): Ossification sequence as a response to functional demands
复制标题
非洲鲶鱼 Clarias gariepinus Burchell (1822)（鲶形目：鲶科）骨颅的个体发育：骨化序列作为对功能需求的反应
DOI：
10.1002/(sici)1097-4687(199803)235:3
复制
发表时间：
1998
影响因子：
1.5
通讯作者：
W. Verraes
中科院分区：
文献类型：
--
作者：
D. Adriaens;W. Verraes
本文研究了革胡子鲶（Clarias gariepinus）从最初骨化到形成完整头骨的个体发育过程。C. gariepinus似乎与发育中的幼虫的功能需求有关。鳃盖骨的早期骨化与鳃盖皮肤运动的开始相一致。早期骨化涉及几个齿状骨，形成前不久的过渡阶段，从内源性到外源性喂养。逐渐增加的鳃条支撑着逐渐扩大的鳃条膜。楔旁骨化可能与在猎物运输过程中保护大脑有关，而几个舌骨，包括副舌骨，是在胸骨舌骨肌肌腱上施加的载荷增加的情况下形成的，从而影响舌骨杆。整体颅骨加固几乎同时发生，特别是在高机械负荷的地方出现了一整套软骨膜骨。悬骨通过韧带连接防止前后脱位，甚至部分骨化，形成籽骨内翼。后来，颅侧线系统被一组沟槽包围，这些沟槽关闭，在个体发育后期经常变成板状。大脑也被背侧覆盖。额外的齿列（下颌骨齿板）的形成似乎与鳃盖四杆系统的形成以及消化系统完全发挥功能的时间相一致。最终，骨骼之间未骨化的区域变得封闭，强化并完全覆盖头骨。J. Morphol. 235：183-237，1998.© 1998 Wiley利斯公司
The ontogeny of the bony skull of the African catfish, Clarias gariepinus, is studied from initial ossification until a complete skull is formed. The ossification sequence in C. gariepinus seems to be related to the functional demands that arise in a developing larva. Early ossification of the opercular bone coincides with the initiation of opercular skin movements. Early ossifications involve several dentulous bones, formed shortly before the transition phase from endogenous to exogenous feeding. The enlarging branchiostegal membrane becomes supported by the gradual adding of branchiostegal rays. Parasphenoid ossification may be related to protection of the brain during prey transport, whereas the several hyoid bones, including the parurohyal, are formed in relation to the increasing loads exerted onto the tendons of the sternohyoideus and consequently onto the hyoid bar. Overall skull reinforcement occurs almost simultaneously, with a whole set of perichondral bones arising especially at places of high mechanical load. The suspensorium becomes protected against dislocation in an anteroposterior direction through a ligamentous connection, which even becomes partially ossified, forming the sesamoid entopterygoid. Later, the cranial lateral‐line system becomes enclosed by a set of gutters, which close, frequently becoming plate‐like later in ontogeny. The brain also becomes covered dorsally. Additional dentition (prevomeral tooth plates) formation seems to coincide with formation of the opercular four‐bar system, as well as with the time the digestive system becomes completely functional. Eventually, unossified regions between the bones become closed off, fortifying and completely covering the skull. J. Morphol. 235:183–237, 1998. © 1998 Wiley‐Liss, Inc.