The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Fish Assemblages Collected using a Beam Trawl in a Sheltered Shallow Water of Doam Bay in the Southern Coast of Korea

남해 도암만에서 새우조망에 채집된 어류의 종조성

  • 김종빈 (국립수산과학원 남해수산연구소) ;
  • 강창근 (국립수산과학원 환경관리과) ;
  • 장대수 (국립수산과학원 남해수산연구소) ;
  • 김영혜 (국립수산과학원 남해수산연구소) ;
  • 조규대 (부경대학교 해양학과)
  • Published : 2003.08.01
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Abstract

Fish assemblage structure in a sheltered shallow water in the Southern Coast of Korea was examined monthly. Sampling was conducted in Doam Bay using a beam trawl between March 2001 and February 2001. A total of 53 fish species from 33 families were caught. Pinkgray goby (Chaeturichthys hexanema), ponyfish (Leiognathus nuchalis) and yellowfin goby (Acanthogobius favimanus) were the most frequent species, comprised 67.4％ of the total numbers captured. Snailfish (Liparis tanakai), yellowfin goby (Acanthogobius flavimanus) and pinkgray goby (Chaeturichthys hexanema) represented 50.8％ of the total biomass. While total abundance (number of individuals) and biomass were high in autumn and winter, species richness (number of species) and diversity were high in spring. Cluster analysis, based on monthly abundance data of the 14 most frequent species, showed that the species were separated into three different groups. Group A composed of pinkgray goby, yellowfin goby, robust tonguefish (Cynoglossus robustus) and scaly hairfin anchovy (Setipinna taty), which were year-round residents, and devil flathead (Onigocia spinosa), Red dragonet (Repomucenus lunatus) and ponyfish, which were abundant in autumn, group B surmullet (Upeneus japonicus), hairtail (Trichiurus lepturus) and gaff-topsail goby (Cryptocentrus filifer), which were abundant in summer, and group C grassfish (Liparis tanakai), spotted velvefish (Erisphex pottii), chameleon goby (Tridentiger trigonocephalus) and Richardson dragonet (Repomucenus richardsonii), which were abundant in winter and spring. A seasonal homogeneity of fish assemblage indicates that overall fish assemblage in Dom Bay is largely controlled by year-round residents.

천해 내만 해역인 남해 서부의 도암만 어류군집 조성을 조사하기 위하여 2001년 3월부터 2002년 2월까지 조망어구(beam trawl)를 이용하여 매월 중순경 최간조시에 어류를 채집하였다. 조사기간동안 총 33과 53종의 어류가 채집되었다. 도화망둑(Chaeturichthys hexanema), 주둥치(Leiognathus muchalis), 문절망둑(Acanthogobius flavimanus)의 3종이 전체 채질개체수의 67.4％를 차지하였으며, 생체량에서는 꼼치(Liparis tanakai), 문절망둑(Acanthogobius flavimanus), 도화망둑(Chaeturichthys hexanema)이 50.8％를 차지하는 우점종이었다. 채집 개체수와 생체량은 가을과 겨울에는 상대적으로 높게 나타났던 반면, 출현종수와 다양도 등의 일변량 지수값들은 대체로 봄과 여름에 높았다. 주요 14종의 월별 출현빈도에 의한 종간 집괴분석 결과 이 해역의 어류군집이 계절별로 출현양상을 달리하는 3개의 무리로 구분될 수 있음을 보였다: 1)계절에 관계없이 연중 출현하는 주거종에 속하는 도화망둑, 문절망둑, 개서대(Cynoglossus robustus) 및 반지(Setipinna taty)와 가을에 높은 출현 빈도를 보인 비늘양태(Onigocia spinosa), 돛양태 (Repomucenus lunatus), 주둥치, 2) 여름에 높은 출현빈도를 보인 노랑촉수(Upeneus japonicus), 갈치 (Trichiurus lepturus) 및 실망둑(Cryptocentrus filifer), 3) 겨울과 봄에 주로 출현하는 종으로 꼼치(Liparis tanakai), 풀미역치(Erisphex pottii), 두줄망둑(Tridentiger trigonocephalus) 및 동갈양태 (Repomucenus richardsottii). 어류군집의 계절에 따른 뚜렷한 분리는 나타나지 않았는데, 이와 같은 결과는 회유종들의 계절에 따른 일시 출현이 나타난다 하더라도, 전체 어류군집 조성이 출현 개체수에서 높은 점유율을 보이는 주거종에 의해 크게 지배를 받아 비교적 안정된 군집을 형성하고 있음을 시사하였다.

Keywords

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