Mun Seong Jun, Yim Hu Sun, Han Kyeong Ho, Park Jae Min
Gyeongsangbuk-Do Native Fish Business Center, Uiseong 37366, Korea.
Dept. of Aqualife Science, Chonnam National University, Yeosu 59626, Korea.
Dev Reprod. 2017 Dec;21(4):399-406. doi: 10.12717/DR.2017.21.4.399. Epub 2017 Dec 31.
This study was conducted to investigate egg development and larvae morphological development of catfish and to provide basic data to clarify the genetic relationship with Siluriformes fish. The mother fish that was used in this study was caught in the stream of Nakdong River in Uiseong-gun, Gyeongbuk. The temperature range of the breeding was 23.0-25.0℃ (mean 24.0±1.0℃) and egg size was 1.62-1.70 mm (mean 1.66±0.05, n=30). Eggs of catfish began hatching at 54 hours and 40 minutes after fertilization. Immediately after hatching, the total length of larvae was 3.60-3.65 mm (mean 3.62±0.03, n=5) and had an egg yolk without swimming ability. On the third day after hatching, the larvae at the medium stage was 8.00-8.65 mm (mean 8.32±0.45) in total length, and two pairs of whiskers formed around the mouth were elongated. On the 12th day after hatching, the larvae at the juvenile stage was 16.5-17.0 mm (mean 16.7±0.35) in total length, and the stem of each fin was in the range, and the juvenile at this period was morphologically similar to the mother fish.
本研究旨在调查鲶鱼的卵发育和幼体形态发育，并提供基础数据以阐明与鲇形目鱼类的遗传关系。本研究中使用的母鱼是在庆北蔚珍郡的洛东江溪流中捕获的。繁殖的温度范围为23.0 - 25.0℃（平均24.0±1.0℃），卵大小为1.62 - 1.70毫米（平均1.66±0.05，n = 30）。鲶鱼卵在受精后54小时40分钟开始孵化。孵化后立即，幼体的全长为3.60 - 3.65毫米（平均3.62±0.03，n = 5），有一个卵黄，没有游泳能力。孵化后第三天，中期幼体的全长为8.00 - 8.65毫米（平均8.32±0.45），口周围形成的两对须变长。孵化后第12天，幼年期幼体的全长为16.5 - 17.0毫米（平均16.7±0.35），每个鳍的茎在该范围内，这一时期的幼体在形态上与母鱼相似。
