Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
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New Finding on Range Expansion and Geographic Variation of Eumicrotremus jindoensis(Cyclopteridae) Collected from Boryeong in the Western Coast of Korea

한국 서해 보령에서 채집된 긴꼬리엄지도치(Eumicrotremus jindoensis)의 지역 확장 및 지리적 변이에 관한 새로운 발견

  • Song, Young Sun (Dokdo Fisheries Research Center, East Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Maeng Jin (West Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Jin-Koo (Department of Marine Biology, Pukyong National University)
  • 송영선 (국립수산과학원 독도수산연구센터) ;
  • 김맹진 (국립수산과학원 서해수산연구소) ;
  • 김진구 (부경대학교 자원생물학과)
  • Received : 2021.08.13
  • Accepted : 2021.09.17
  • Published : 2021.09.30
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Abstract

Since the original description of new species, Eumicrotremus jindoensis, we confirmed the first occurrence of E. jindoensis based on a single specimen (22.3 mm SL) caught by inshore stow net at the coastal waters of Boryeong of Korea. However, our specimen slightly differed from type specimens in having more vertebrae (26 vs. 21~24), longer snout (17.4% vs. 8.1~9.1%), longer preanus length (67.5% vs. 58.0~58.3%) and shorter second dorsal fin base (15.3% vs. 20.2~20.8%). Comparing with mtDNA COI and Cytb sequences, we could not find any differences in mtDNA Cytb sequences between our specimen and type specimens, which suggest that those morphological differences may belong to local variation by habitat and environmental condition between off Jindo Island and off Boryeong in Korea. Eumicrotremus uenoi is known from the southern sea of Korea narrowly (Busan, Tongyeong, and Jeju Island), the other congeneric species (E. asperrimus, E. pacificus, and E. taranetzi) from only the eastern sea of Korea, but E. jindoensis from the central coast to southern coast of western Korea.

우리나라 진도에서 채집된 도치과(Cyclopteridae)의 긴꼬리엄지도치(Eumicrotremus jindoensis)는 2017년에 신종 보고 이후 추가적으로 서해 보령에서 1개체(22.3 mm SL)가 연안개량안강망으로 채집되었다. 그러나, 본 개체는 모식표본보다 더 많은 척추골수(26 vs. 21~24), 긴 주둥이길이(17.4% vs. 8.1~9.1%), 긴 항문장(67.5% vs. 58.0~58.3%), 그리고 짧은 제2등지느러미 앞 길이(15.3% vs. 20.2~20.8%)를 가지는 점에서 약간의 형태적 차이를 나타냈다. 미토콘드리아 DNA COI 영역과 Cytb 영역의 염기서열을 비교했을 때, 본 개체는 모식표본과 유전적인 차이는 발견할 수 없었다. 따라서 이러한 형태적인 차이는 우리나라 진도와 보령 해역의 서로 다른 서식지 및 환경 조건에 따른 지리적 변이로 추정된다. 우리나라 도치과 어류 중 엄지도치(E. uenoi)는 우리나라 남해역(부산, 통영 및 제주도)에서만 발견되고 있으며, 동 속의 우릉성치(E. asperrimus), 골린어(E. pacificus) 그리고 도치(E. taranetzi)는 모두 동해역에서만 서식하기 때문에, 긴꼬리엄지도치만이 우리나라 서해의 중부 및 남부해역에서 발견되는 점에서 매우 흥미롭다.

Keywords

Acknowledgement

This work was supported by National Marine Biodiversity Institute Research Program(2021M01100).

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