Reproductive Characteristics of Rhodeus pseudosericeus (Pisces: Acheilognathinae) in the Heukcheon, Namhangang (River), Korea

남한강 수계 흑천에 서식하는 한강납줄개 Rhodeus pseudosericeus (Pisces: Acheilognathinae)의 산란 특성

  • Kim, Hyeong Su (Inland Aquaculture Research, National Institute of Fisheries Science) ;
  • Yoon, Jeong Do (National Institute of Ecology) ;
  • Yang, Hyun (Institute of Biodiversity Research) ;
  • Choi, Hye-Sung (South sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Lee, Jeong-Ho (Inland Aquaculture Research, National Institute of Fisheries Science)
  • 김형수 (국립수산과학원 중앙내수면연구소 내수면양식연구센터) ;
  • 윤정도 (국립생태원) ;
  • 양현 ((주)생물다양성연구소) ;
  • 최혜승 (국립수산과학원 남해수산연구소) ;
  • 이정호 (국립수산과학원 중앙내수면연구소 내수면양식연구센터)
  • Received : 2017.09.13
  • Accepted : 2017.10.13
  • Published : 2017.12.31

Abstract

Reproductive characteristics of Rhodeus pseudosericeus (Pisces: Acheilognathinae) was investigated at the Heukcheon (River), Yangpyeong-gun, Gyeonggi-do, Korea from January to July in 2012. This fish prefers heavily vegetated stagnant pool with Phragmites japonica and Salix koreensis and area with high proportions of sand and mud. The standard length of the population indicated that 13~22 mm group is 0-year old, 30~45 mm group is 1-year old, 45~55 mm group is 2-year old and 45~70 mm group is more than 3-year old (June in 2012). The sex ratio of female to male was 1 : 0.80. The spawning season was from March to June with water temperatures in the range $11.0{\sim}26.2^{\circ}C$. The embryos were found with no egg mass in Unio douglasiae sinuolatus and the number of those was 1~22 ($5.8{\pm}5.51$). The number of the embryos found in each of the four parts of the mussel gill was 1~9 ($2.7{\pm}2.16$) in left outer, 1~2 ($1.5{\pm}0.71$) in left outer, 1~5 ($1.8{\pm}1.79$) in left outer and 1~22 ($5.8{\pm}5.51$) in left outer.

본 연구는 2012년 1~7월까지 경기도 양평군 흑천 일대에서 한강납줄개의 산란 특성에 관한 연구를 실시하였다. 한강납줄개는 물의 흐름이 느리고 달뿌리풀과 버드나무의 수생식물이 많은 곳의 모래와 뻘의 하상구조를 보이는 지점을 선호하였다. 연령은 6월 기준으로 13~22 mm는 당년생, 체장 30~45 mm는 만 1년생, 45~55 mm는 만 2년생, 55~70 mm 이상군은 만 3년생 이상으로 추정되었다. 조사기간 동안 암수 성비는 1 : 0.80로 나타났고 산란기는 3월부터 6월까지로 추정되었다(수온 $11.0{\sim}26.2^{\circ}C$). 한강납줄개는 작은말조개 Unio douglasiae sinuolatus에 비점착성 알을 산란하였고 확인된 알 및 및 자어수는 1~22 ($5.8{\pm}5.51$)개였다. 반새 위치에 따른 알 및 자어수는 왼쪽 외반새 1~9 ($2.7{\pm}2.16$)개, 왼쪽 내반새 1~2 ($1.5{\pm}0.71$)개, 오른쪽 내반새 1~5 ($1.8{\pm}1.79$)개, 오른쪽 외반새 1~22 ($5.8{\pm}5.51$)개로 나타났다.

Keywords

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