Seo Won-Il, Park Jae-Min, Lee Sung-Hun, Yoon Seong Min, Hwang Seon-Yeong, Han Kyeong-Ho
Jeollanam-Do Ocean and Fisherises Science Institute, Yeosu 59713, Korea.
Gyeongsangbuk-Do Native Fish Business Center, Uiseong 37366, Korea.
Dev Reprod. 2018 Mar;22(1):9-18. doi: 10.12717/DR.2018.22.1.009. Epub 2018 Mar 31.
This study was conducted to investigate the skeletal development of bullhead torrent catfish, larvae and to utilize them as basic data for the taxonomic study of larvae. Skeletal development was observed by being divided into cranium, visceral skeleton, shoulder girdle bone, pelvic girdle bone and vertebra. On the first day after hatching, the pre-larvae had an average total length of 7.92 mm, and a line-shaped parasphenoid ossified in the cranium. In the jaw bone, the dentary supporting the lower jaw and the maxillary supporting the upper jaw were ossified. In the anterior abdominal vertebrae of the vertebra, seven centrums began to ossify and five neural spines ossified simultaneously. On the 3 day after hatching, pre-larvae had an average total length of 8.95 mm, and the prefrontal ossified in cranium. The number of abdominal vertebrae was increased to 14, and three parapophysis developed from the front side. On the 24th day after hatching, post-larvae had an average total length of 15.2 mm and the epural bone ossified in coccyx. The parhypural bone was ossified, and ossification of coccyx and pelvic girdle bone was completed. On the 30th day after hatching, the average total length of the juvenile was 17.8 mm, and the ossification of cranium and visceral skeleton was all completed while the preorbital and three suborbitals were ossified in the orbital region of the cranium.
本研究旨在调查牛头鲇幼体的骨骼发育情况，并将其作为幼体分类学研究的基础数据。通过将骨骼发育分为颅骨、内脏骨骼、肩带骨、腰带骨和脊椎来进行观察。孵化后第一天，前期幼体平均全长7.92毫米，颅骨中有一条线状的副蝶骨骨化。在颌骨中，支撑下颌的齿骨和支撑上颌的上颌骨骨化。在脊椎的前部腹椎中，七个椎体开始骨化，五个神经棘同时骨化。孵化后第3天，前期幼体平均全长8.95毫米，颅骨中的额前骨骨化。腹椎数量增加到14个，从前侧长出三个横突。孵化后第24天，后期幼体平均全长15.2毫米，尾骨中的尾上骨骨化。副尾下骨骨化，尾骨和腰带骨的骨化完成。孵化后第30天，幼鱼平均全长17.8毫米，颅骨和内脏骨骼的骨化全部完成，而颅骨眶区的眶前骨和三个眶下骨骨化。
