Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Comparison of morphometric traits between small yellow croaker (Larimichthys polyactis) and yellow croaker(L. crocea)

참조기(Larimichthys polyactis)와 부세(L. crocea) 간의 외부계측형질 비교

  • Park, In-Seok (Division of Marine Bioscience, College of Ocean Science and Technology, Korea Maritime & Ocean University) ;
  • Oh, Ji Su (National Agency for Marine Seed Improvement, Aquaculture Management Division, National Institute of Fisheries Science)
  • 박인석 (한국해양대학교 해양생명과학부) ;
  • 오지수 (국립수산과학원 양식관리과 GSP수산종자사업단)
  • Received : 2020.02.06
  • Accepted : 2020.10.12
  • Published : 2020.12.31
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Abstract

Several methods including morphometric analysis were used to distinguish small yellow croaker (Larimichthys polyactis) from yellow croaker (Larimichthys crocea), which have very similar external shapes. Morphometric analysis showed four considerable differences (p<0.05) among the total 48 morphometric dimensions, but no differences were seen in the classical dimensions (p>0.05). Rather, significant differences were seen in two truss dimensions: Insertion of dorsal fin base - origin of pectoral fin base and origin of anal fin base - origin of pectoral fin base, and two head part dimension: most anterior extension of the head - above of eye and above of eye - posterior aspect of operculum(p<0.05). However, the yellow croaker had higher values than the small yellow croaker in the other three morphometric dimensions except for the head part dimension of above of eye - posterior aspect of operculum of the four morphometric dimensions (p<0.05). The X-ray photographs indicated that the small yellow croaker (45.1±2.34°) had 8.4% more curved vertebral column than the yellow croaker(38.4±1.82°). A diamond-shaped cranium was found when the skin was peeled off from both fish but the commonly held fact that only the small yellow croaker has a diamond-shaped cranium is not accurate. Our results confirmed that the two fish could be definitely distinguished by their external body shape.

본 연구에서는 외부형태적으로 매우 비슷한 참조기(Larimichthys polyactis) 와 부세(L. crocea)의 두 종 간 구분을 위해 계측형질 분석을 포함한 몇가지 기법들을 수행하였다. 총 48개의 계측형질 중 4개의 유의한 차이를 보이는 계측형질이 파악되었으며(p<0.05) classical dimension에서는 유의한 차이를 보이는 계측형질은 없었다(p>0.05). 오히려, 2가지의 truss dimension(Insertion of dorsal fin base origin of pectoral fin base와 Origin of anal fin base - origin of pectoral fin base)와 2가지의 head part dimension (Most anterior extension of the head - above of eye와 Above of eye posterior aspect of operculum)에서는 유의한 차이가 나타났다(p<0.05). 하지만, 이러한 4가지 계측형질 중 head part dimension의 Above of eye - posterior aspect of operculum의 계측형질을 제외한 나머지 3가지 계측형질들에서 부세가 참조기에 비해 더 큰 수치를 나타내었다(p<0.05). X-ray 분석 결과 curved vertebral column에서 부세는 45.1±2.34°로 참조기의 38.4±1.82°에 비해 8.4% 더 큰 수치를 나타내었다(p<0.05). 머리부위의 표피를 제거한 후의 유상돌기는 두 종에 모두 존재하여 일반적으로 참조기에서만 유상돌기가 존재한다고 알려진 바와는 달리, 유상돌기는 두 종을 구분하기 위한 형질로 볼 수 없었다. 본 연구 결과는 참조기와 부세에서 일부 외부 체형에 의해 명확히 구분 가능함을 시사한다.

Keywords

Acknowledgement

본 연구는 부산산업과학혁신원의 2020년 대학 R&D 씨앗기획사업 지원으로 수행되었습니다. 권고와 수정 지시로 본 논문의 질적 수준과 완성도를 높여주신 익명의 심사자들께 감사드립니다. 아울러, 본 연구 수행에 도움을 주신 한국해양대학교 수산유전육종학연구실(부산, 한국) 연구진에 감사드립니다. 본 연구는 교육부의 연구윤리 확보를 위한 지침(교육부 훈령 제153호)와 식품의약품안전처의 실험동물에 관한 법률(법률 제15278호) 기준을 준수하였으며, 아울러 한국해양대학교 연구윤리를 준수하였습니다.

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