Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Seasonal Variation in Fish Species Composition in the Coastal Water of Samdong-myeon, Namhae, Korea

남해군 삼동면 연안 어류의 월별 종조성 변화

  • Kim, Jun Sop (Ocean & Fisheries Science Institute) ;
  • Lee, Yong-Deuk (The Marine Bio-Education & Research Center, The Institute of Marine Industry, Gyeongsang National University) ;
  • Lee, Seung Hwan (Fisheries Resources Research Center, National Institute of Fisheries Science) ;
  • Park, Jun Su (The Marine Bio-Education & Research Center, The Institute of Marine Industry, Gyeongsang National University) ;
  • Gwak, Woo-Seok (The Marine Bio-Education & Research Center, The Institute of Marine Industry, Gyeongsang National University)
  • 김준섭 (전라남도 해양수산과학원) ;
  • 이용득 (경상대학교 해양산업연구소 해양생물교육연구센터) ;
  • 이승환 (국립수산과학원 수산자원연구센터) ;
  • 박준수 (경상대학교 해양산업연구소 해양생물교육연구센터) ;
  • 곽우석 (경상대학교 해양산업연구소 해양생물교육연구센터)
  • Received : 2017.11.15
  • Accepted : 2018.03.20
  • Published : 2018.03.31
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Abstract

Fish assemblages in a sandy shore and an eelgrass bed were compared based on monthly samples in the southern coastal water of Korea. Samples were collected by a beam trawl in the sandy shore and a surf net in the eelgrass from March to February 2012. The common fish species were Syngnathus schlegeli, Pseudoblennius cottoides, Pholis nebulosa, Favonigobius gymnauchen, Gymnogobius heptacanthus, Pseudopleuronectes yokohamae, Takifugu niphobles. Among them S. schlegeli, Urocampus nanus, P. cottoides, P. nebulosa, T. niphobles were high abundance in the eelgrass bed than in the sandy shore, whereas Acanthogobius flavimanus, Acentrogobius pflaumi, F. gymnauchen, G. heptacanthus, P. yokohamae were high in the sandy shore. Aulichthys japonicus, Hippocampus coronatus, Sebastes inermis, Lateolabrax japonicus, Siganus fuscescens were found in the eelgrass bed, and Thryssa hamiltoni, Mugil cephalus, Inimicus japonicus, Platycephalus indicus, Hexagrammos otakii, Furcina ishikawae, Liparis tanakae, Repomucenus curvicornis, and Eutaeniichthys gilli were observed in the sandy shore. Species composition and abundance varied seasonally in two habitats; The number of species and abundance was high in August and September, while biomass was the highest in April and September. Fish numbers as well as biomass were lowest in February. Number of individuals and biomass of fish in the eelgrass bed were significantly higher than those of in the sandy shore. Some fish preferred to live in the eelgrass were collected in the sandy shore, while fish preferred to live in the sandy shore were rarely collected in the eelgrass.

남해 삼동면 연안의 사질과 잘피밭의 어류군집을 비교하기 위해서 2011년 3월부터 2012년 2월까지 소형 beam trawl과 지인망을 이용하여 어류를 매월 채집하였다. 두 곳의 조사지점에서 공통으로 출현한 종은 총 19종이었다. 실고기, 풀해마, 가시망둑, 돌팍망둑, 감성돔, 베도라치, 문절망둑, 줄망둑, 날개망둑, 살망둑, 두줄망둑, 문치가자미, 복섬 등이 공통으로 출현하였고, 이 중 실고기, 풀해마, 가시망둑, 베도라치, 복섬은 잘피밭에서, 돌팍망둑, 감성돔, 문절망둑, 줄망둑, 날개망둑, 살망둑, 두줄망둑, 문치가자미는 사질연안에서 주로 출현하였다. 실비늘치와 해마, 볼락, 농어, 독가시치는 잘피밭에서만 출현하였고, 풀반지, 숭어, 쑤기미, 양태, 쥐노래미, 알롱횟대, 꼼치, 동갈양태, 댕기망둑은 사질에서만 출현하였다. 채집된 어류 대부분은 소형어나 유어로 남해 연안의 잘피밭과 사질연안이 이들 어류의 성육장의 역할을 하는 것으로 생각된다. 출현 종수는 2011년 8~9월에, 개체수는 2011년 8월이 가장 높았다. 생체량은 2011년 4월과 9월에 가장 높았다. 대체적으로 겨울철에는 출현 종수, 개체수 및 생체량이 모두 낮았다. 개체수 및 생체량은 사질연안에 비하여 모두 잘피밭에서 높았으며, 사질연안에서는 잘피밭을 선호하는 어류들이 다수 출현하였지만, 잘피밭에서는 사질연안을 선호하는 어종이 거의 출현하지 않았다.

Keywords

References

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