Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Spawning in Mussel and Adaptation Strategy of Acheilognathus signifer (Cyprinidae: Acheilognathinae)

묵납자루, Acheilognathus signifer (Cyprinidae; Acheilognathinae)의 패 내 산란과 적응전략

  • Baek, Hyun-Min (Division of Life Sciences, College of Natural Sciences, Kangwon National University) ;
  • Song, Ho-Bok (Division of Life Sciences, College of Natural Sciences, Kangwon National University)
  • 백현민 (강원대학교 자연과학대학 생명과학부) ;
  • 송호복 (강원대학교 자연과학대학 생명과학부)
  • Received : 2005.04.03
  • Accepted : 2005.05.25
  • Published : 2005.06.30
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Abstract

Most of the eggs and (or) pre-larvae of Acheilognathus signifer were observed from the gills of Unio douglasiae sinuolatus, 30~45 mm in the shell length, that is the host mussel of A. signifer. There was no selectivity in proportion to mussel size at the range observed. One to seven individual eggs and (or) pre-larvae were found in the mussels, with a mean of 2.5 individuals, and the rate of possessing one egg and (or) pre-larva was 50.0%. When the prelarva of A. signifer acquired swimming ability inside the mussel, it moved into the suprabranchial chamber. It was estimated that the growth period was 4~6 weeks. The minute tubercles of the pre-larvae were observed immediately after hatching. Absorption of the minute tubercles was observed starting the 7 th day, with most of tubercles absorbed 13 days after hatching and completed 20 days after the yolk was entirely absorbed.

A. signifer의 숙주 조개인 U. douglasiae sinuolatus 각 장이 30~45 mm에서 대부분의 알과 자어가 발견되었으며, 각장이 30 mm 이상에서는 크기에 따른 선택성의 차이는 없었다. 조개 내에서 발견된 난 및 전기자어의 수는 1~7개(마리)이었으며, 난 또는 자어의 보유율은 1개(마리)가 50.0%로 가장 높았고, 조개 1개체 당 평균 보유수는 2.5개 (마리)였다. A. signifer의 전기자어는 조개내에서 유영능력을 갖추면 상새방으로 이동하였으며, 상새방에서 성장기간은 4~6주 정도로 추정되었다. 전기자어의 표피상 돌기는 부화 직후부터 관찰되었다. 부화 7일째부터 표피상돌기의 흡수가 진행되기 시작하였으며, 부화 13일째부터 대부분의 표피상돌기는 흡수되었고, 난황이 완전히 흡수된 직후인 부화 20일 후에는 표피상돌기가 완전히 흡수되었다.

Keywords

References

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