초록

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1960년 1월 16일 강원도 명주군 옥계면 금진삼리 앞 500m 해상에서 삼중자망으로 채포한 쪽지를 사용하여 선상에서 인공수정시킨 후 실험실로 운반 사육하면서 난발생과정 및 자치어의 형태에 대하여 관찰한 결과를 요약하면 다음과 같다. 수정란은 난경이 $2.28\~2.36\;mm$로서 담유백색을 띤 구형의 침성점착란이다. 수체내의 사육수온은 $7.5\~21.4^{\circ}C$ 범위였으며 수정후 725시간만에 부화하였다. 부화직후의 자어는 전장이 $6.0\~6.9mm$로서 머리와 몸통이 크며, 배지느러미가 변형된 흡반이 형성되어 있고 수많은 흑색소포가 머리와 몸통부분에 발달한다. 부화후 17일째의 자어를 전장이 9.1 mm이며 아가미구멍은 가슴지느러미 기저 윗부분을 제외하고는 융합되어 있고, 꼬리위에도 흑색소포가 나타난다. 부화후 31일째의 자어는 전장이 10.6mm로서 각 지느러미 기조수가 정수에 달하여 치어로 되며, 제1등지느러미 가시는 소실된다. 부화후 103일째의 치어는 전장이 $15.4\~17.5mm$ 이다.

Abstract ▼ AI-Helper

On January 16, 1986, mature adults of smooth lumpsucker, Aptocyclus ventricosus (Pallas) were collected from the coastal water of Okkye, Myongju-gun, Kangwon-do, Korea. The authors carried out artificial insemination on the boat. The eggs were incubated and the larvae were reared in laboratory. Duri...

On January 16, 1986, mature adults of smooth lumpsucker, Aptocyclus ventricosus (Pallas) were collected from the coastal water of Okkye, Myongju-gun, Kangwon-do, Korea. The authors carried out artificial insemination on the boat. The eggs were incubated and the larvae were reared in laboratory. During the incubation period water temperature fluctuated between $7.5^{\circ}C$ and $21.4^{\circ}C$. The eggs of smooth lumpsucker are demersal and adhesive. The eggs diameters were varied from 2.28 to 2.36 mm. The hatching took place in ca. 725 hours after fertilization. The newly hatched larvae were 6.0-6.9 mm in total length. The features of the hatched larvae lie in the tadpole-like body form and in the well developed sucking disk, namely the ventral fins. 17 days after hatching, the larva attained 9.1 mm in total length. The gill opening retained a small opening at its upper part. Melanophores were developed on the tail. 31 days after hatching, the larva attained 10.6 mm in total length, and became juvenile. The first dorsal fin was disappeared. 105 days after hatching, the larvae attained 15.4-17.5 mm in total length.