한국어류학회지 (Korean Journal of Ichthyology)

  • 제32권4호
  • /
  • Pages.199-209
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  • 2020
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  • 1225-8598(pISSN)
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  • 2288-3371(eISSN)
한국어류학회 (The Ichthyological Society of Korea)
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한국산 대주둥치속(대주둥치과) 어류의 형태와 분자 변이의 불일치

Discordance between Morphological and Molecular Variations of the Genus Macroramphosus (Macroramphosidae) from Korea

  • 손민수 (부경대학교 자원생물학과) ;
  • 김진구 (부경대학교 자원생물학과)
  • Sohn, Min-Soo (Department of Marine Biology, Pukyong National University) ;
  • Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
  • 투고 : 2020.04.06
  • 심사 : 2020.11.04
  • 발행 : 2020.12.31
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초록

본 연구는 예전부터 혼란스러웠던 한국산 대주둥치속, Macroramphosus 어류의 분류학적 위치를 명확히 하기 위해, 한국산 18개체를 일본/대만산 35개체 및 지중해산 M. scolopax와 형태 및 분자 변이를 비교 분석하였다. 한국, 일본 및 대만산 대주둥치속 어류는 제1등지느러미 극조 길이(A-type은 22.8~32.1%, B-type은 15.6~21.4%), 제1등지느러미와 제2등지느러미 사이 길이(A-type은 6.4~9.7%, B-type은 8.6~13.3%), 체고(A-type은 20.0~28.0%, B-type은 17.3~22.6%)에서 두 type으로 명확히 구분되었으나, 유전적으로는 구분되지 않았다(CR에서 0.0~3.3%, cyt b에서 0.0~1.3%, COI에서 0.0~0.5%). 한편, 한국산 대주둥치는 지중해산 M. scolopax와 유전적으로 명확히 구분되어(CR에서 9.9~11.5%, cyt b에서 3.8~4.6%, COI에서 1.2~3.6%), 최근 사용하고 있는 학명 M. scolopax를 M. japonicus (및/또는 M. sagifue)로 변경해야 할 것이다. 그러나, 본 연구에서 두 type 간 형태변이와 분자변이 간 일치성을 찾지 못했으며, 이는 아마도 그들간에 분화가 상당히 최근에 일어났음을 시사한다. 두 type 간 유전자 교류 정도를 파악하려면 향후 microsatellite와 같은 보다 민감한 마커를 이용한 후속 연구가 필요할 것이다.

In order to clarify the taxonomic status of the Korean Macroramphosus species, which were previously confused, we investigated morphological and molecular variations of Macroramphosus (18 individuals) from Korea, and Macroramphosus (35 individuals) from Japan and Taiwan, and compared with those of M. scolopax from type locality (Mediterranean Sea). Although the Korean and Japanese specimens of Macroramphosus were clearly divided into two types in the first dorsal spine length (22.8~32.1% in A-type vs. 15.6~21.4% in B-type), distance between the first dorsal fin and second dorsal fin (6.4~9.7% vs. 8.6~13.3%), and body depth (20.0~28.0% vs. 17.3~22.6%), no genetic differences among all individuals of longspine snipefish between them were found at the specific level [d=0.0~3.3% in control region (CR); 0.0~1.3% in cytochrome b (cytb); 0.0~0.5% in cytochrome c oxidase subunit I (COI)]. Whereas, they were well distinguished in genetics (9.9~11.5% in CR; 3.8~4.6% in cytb; 1.2~3.6% in COI) from those of M. scolopax in Mediterranean Sea. It needs the scientific name of the longspine snipefish (M. scolopax) in Korea be changed as M. japonicus (and/or M. sagifue). However, our results could not find evidence of consistency between morphological and mitochondrial DNA variations which suggests that their differentiation event may occur fairly recently. Further studies using more sensitive markers such as microsatellite are needed to clarify the degree of gene flow between the two types.

키워드

과제정보

이 논문은 2019학년도 부경대학교 연구[II] 교원 지원사업에 의하여 연구되었습니다. 또한 이 논문의 완성도를 높여 주신 심사위원께 감사드립니다.

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