Park Jae Min, Mun Seong Jun, Yim Hu Sun, Han Kyeong Ho
Gyeongsangbuk-do Native Fish Business Center, Uiseong 37366, Korea.
Marine Technology Undergraduate, Chonnam National University, Yeosu 59626, Republic of Korea.
Dev Reprod. 2017 Sep;21(3):287-295. doi: 10.12717/DR.2017.21.3.287. Epub 2017 Sep 30.
This study was conducted to observe egg and larvae morphological development of carp to obtain basic data for resource conservation and taxonomic research. Brood carp used in the research (total length 67.3-75.5 cm, average 71.0±3.45 cm) were bred in a circular rearing aquarium (600×300×100 cm) using a running water system from January to July, 2015. Breeding water temperature was maintained at 23.0-25.0℃(average 24.0℃). Fertilized carp eggs were translucent and globular, and their size was 1.75-1.89 mm (average 1.82±0.06 mm). Blastoderms formed 10 min after fertilization and reached the two-cell stage 30 min after fertilization. Then, the embryo turned dark and exhibited melanophores, and blood started flowing from the heart across the egg yolk at 42 hrs and 50 min after fertilization. Hatching began 70 hrs and 26 min after fertilization larvae emerged through the egg membrane, starting from the head. The length of prelarvae immediately after hatching was 5.23-5.38 mm (average 5.31±0.11 mm) the mouth and anus were closed, and the pectoral fin was formed. Postlarvae at 18 days after hatching had a total length of 11.9-13.9 mm (average 12.9±1.40 mm), separate anal fin and back membranes, and fin ray. Juveniles fish at 35 days after hatching had a total length of 29.9-30.2 mm (average 30.1±0.13 mm), with the body covered with scales, and the same number of fin rays, color, and shape as their broodstork.
本研究旨在观察鲤鱼卵和幼体的形态发育，以获取资源保护和分类学研究的基础数据。研究中使用的亲鱼（全长67.3 - 75.5厘米，平均71.0±3.45厘米）于2015年1月至7月在圆形养殖水族箱（600×300×100厘米）中采用流水系统进行饲养。繁殖水温维持在23.0 - 25.0℃（平均24.0℃）。受精的鲤鱼卵呈半透明球形，大小为1.75 - 1.89毫米（平均1.82±0.06毫米）。受精后10分钟形成胚盘，30分钟后达到二细胞期。然后，胚胎变黑并出现黑素细胞，受精后42小时50分钟时血液开始从心脏流经卵黄。受精后70小时26分钟开始孵化，幼体从头部开始穿过卵膜而出。刚孵化后的前期幼体长度为5.23 - 5.38毫米（平均5.31±0.11毫米），口和肛门闭合，胸鳍形成。孵化后18天的后期幼体全长为11.9 - 13.9毫米（平均12.9±1.40毫米），臀鳍和背膜分开，有鳍条。孵化后35天的幼鱼全长为29.9 - 30.2毫米（平均30.1±0.13毫米），身体覆盖鳞片，鳍条数量、颜色和形状与其亲鱼相同。
