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张伟, 刘莹, 官曙光, 于超勇, 赵文溪, 宋爱环, 李绍彬. 大泷六线鱼仔稚鱼头部骨骼发育观察[J]. 水生生物学报, 2021, 45(4): 898-905. DOI: 10.7541/2021.2020.129
引用本文: 张伟, 刘莹, 官曙光, 于超勇, 赵文溪, 宋爱环, 李绍彬. 大泷六线鱼仔稚鱼头部骨骼发育观察[J]. 水生生物学报, 2021, 45(4): 898-905. DOI: 10.7541/2021.2020.129
ZHANG Wei, LIU Ying, GUAN Shu-Guang, YU Chao-Yong, ZHAO Wen-Xi, SONG Ai-Huan, LI Shao-Bin. OBSERVATION ON THE DEVELOPMENT OF THE HEAD BONES OF THE LARVAE AND JUVENILES OF HEXAGRAMMOS OTAKII[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(4): 898-905. DOI: 10.7541/2021.2020.129
Citation: ZHANG Wei, LIU Ying, GUAN Shu-Guang, YU Chao-Yong, ZHAO Wen-Xi, SONG Ai-Huan, LI Shao-Bin. OBSERVATION ON THE DEVELOPMENT OF THE HEAD BONES OF THE LARVAE AND JUVENILES OF HEXAGRAMMOS OTAKII[J]. ACTA HYDROBIOLOGICA SINICA, 2021, 45(4): 898-905. DOI: 10.7541/2021.2020.129

大泷六线鱼仔稚鱼头部骨骼发育观察

OBSERVATION ON THE DEVELOPMENT OF THE HEAD BONES OF THE LARVAE AND JUVENILES OF HEXAGRAMMOS OTAKII

  • 摘要: 采用软骨-硬骨双染色方法, 对大泷六线鱼仔稚鱼头部骨骼的发育过程进行详细观察与分析。结果显示: 大泷六线鱼初孵仔鱼头部已存在迈克尔氏软骨、腭方骨、舌棒骨和第一基舌软骨等骨骼元件; 当仔鱼4 DPH时, 第二基鳃软骨出现在第一基鳃软骨后端, 缘带向后延伸, 且软骨桥出现, 将头盖骨分为前卤和后卤; 9 DPH时, 3对鳃下骨, 第五对角腮骨可见; 13 DPH时, 迈克尔氏软骨背中部突, 4对鳃上骨、鼻骨、中筛板和侧筛板相继出现; 16—21 DPH时, 基舌骨出现在第一基鳃软骨前方; 23 DPH时, 齿骨开始骨化; 26 DPH时, 前颌骨和上颌骨开始骨化; 至35 DPH时, 前颌骨和上颌骨完成骨化; 50 DPH时, 副蝶骨、前鳃盖骨、缘带、后翼骨、鼻骨和续骨完成骨化; 60 DPH时, 大泷六线鱼头部骨骼, 除舌棒骨外, 基本骨化完成。研究摸清了大泷六线鱼仔稚鱼头部骨骼不同骨元件的发育时序, 阐释了头部骨骼的发育规律及其特殊性, 为大泷六线鱼早期骨骼功能发育研究及头部骨骼畸形鉴定提供了科学依据。

     

    Abstract: The fat greenling (Hexagrammos otakii) is a commercially important fish in North China. It is not only an ideal species for cage culture, but also optimal for expanding reef bays and developing recreational fishing. Scholars have carried out research on the fat greenling’s embryonic development, early morphology development, as well as spine and appendicular bone development. However, there is a lack of studies on its skull development. This study intends to show the skeletal framework of the fat greenling’s head. It also aims to determine the key processes of bone ossification and timing of development to understand the close relationship between its skull growth and functional development such as feeding and breathing. Samples of the fat greenling larvae were taken once every day and once every 5 days for 0—31 DPH and 35—60 DPH, respectively. The double staining of cartilage and bone procedure was used to analyze the skeletal development of newly hatched fat greenling larvae. The results showed that there were many skeletal elements in the head of the newly hatched fat greenling larvae, including Meckel’s cartilage, palatoquadrate, Hyoidbar and Basibranchial 1. At 4 DPH, the Basibranchial 2 appeared at the posterior end of the Basibranchial1, and the marginal zone extended backwards. The cartilage bridge then emerged, and the skull was divided into anterior and posterior fontanels. At 9 DPH, 3 pairs of Hypobranchial bones and the fifth pair of Ceraobranchial were visible. At 13 DPH, the Meckelian cartilage protruded on the middorsal part, and four pairs of Epibranchial, nasal bone, Lateral Ethmoid and Ehmoidplate appeared successively. At 16—21 DPH, the Basihyal appeared in front of the Basibranchial1. At 23 DPH, the dentary bone began to ossify while the premaxillary and superior maxillary bones started to ossify at 26 DPH, and the ossification process completed at 35 DPH. The ossification of parasphenoid bone, preoperculum, Taenia marginalis, metapterygoid bone, nasal bone and symplectic bone was completed at 50 DPH. At 60 DPH, except the Hyoidbar bone, the skeletal framework of the fat greenling’s head was completely ossified. The results showed that it takes a long time for the development of the fat greenling’s skeletal framework, and the early growth of its skull is closely related to the enhancement of the feeding and respiratory capacity of the larvae. The results of this study not only explain the growth and development process of the fat greenling’s skull, but also provide scientific basis for early functional development research and identification of skull deformities.

     

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