• 수산해양기술연구
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• 제48권3호
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• pp.284-292
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• 2012

Species composition and abundance of larval fishes in the coastal waters off Gori in the southeastern Korea were investigated from January to December in 2006. During the study period, 32 larvae species belonging to 20 families were collected. The dominant species were Engraulis japonicius, Hexagrammos agrammus, Sillago japonicus, Acropoma japonicum, Apogon lineatus, and Konosirus punctatus. These six species accounted for 87.0% of the total number of individuals collected. The number of species, number of individuals, and species diversity indices fluctuated by season. The peak numbers of species and individuals occurred in July and May, respectively. Correlation analysis showed that monthly variations in water temperature and salinity could act as an indicators of seasonal variations in the larval fish community structure and abundance of the dominant species; in particular, the abundance of S. japonicus, A. japonicum, and A. lineatus were significantly corrected with the water temperature.

• 한국해양바이오학회지
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• 제13권2호
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• pp.66-75
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• 2021

In 2014, fishes caught using stow nets in coastal waters off Gochang from May to October were assessed for appearance patterns. The fishes were caught at four research stations (St.) and were found to comprise 37 species, 18 families, and 7 orders. The dominant species were Thryssa kammalensis, Setipinna tenuifilis, and Sardinella zunasi. To gain a measure of their biodiversity, all species were assessed for their number, richness, diversity, evenness, and dominance. The highest and lowest numbers of total fishes caught were recorded in September (4,819 individuals) and October (828 individuals), respectively. The diversity was the highest in October (H' = 2.478) and lowest in June (H' = 0.880). The evenness index was the highest in October (E = 0.780) and lowest in June (E = 0.343). The richness index was the highest in October (R = 3.424) and lowest in May (R = 1.552). Finally, the dominance index was the highest in June (D = 86.2%) and lowest in October (D = 40.3%).

• 한국수산과학회지
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• 제37권6호
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• pp.505-510
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• 2004

The feeding habits of brown barracuda (Sphyraena pinguis) were analyzed using the stomach contents of monthly samples collected from coastal waters of Gadeok-do, Korea from January to December, 1998. Brown barracuda occurred mainly from summer to autumn in the study area, and ranged from 15 to 35 cm in standard length. Brown barracuda was a piscivorous fish which, mainly consumed teleost fish such as anchovy (Engranlis japonicus) and chefoo thryssa (Thfssa kammalensis). Its diet also included small quantities of shrimp and cephalopods. Although smaller fishes (<25 cm SL) consumed shrimp and cephalopods as well as fish, larger fishes (>30 cm SL) consumed exclusively teleost fish. The prey size increased with increase of fish size.

• 수산해양기술연구
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• 제48권4호
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• pp.379-386
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• 2012

The feeding habits of Sebastiscus marmoratus collected from the Western Coastal Waters of Jeju Island between June 2008 and July 2009 were studied based on examination of the stomach contents. A total 254 individuals of S. marmoratus ranged from 13.2 to 29.6cm (mean 20.7cm) in Standard length (SL). S. marmoratus consumed mainly teleosts such as Chromis notata and Sebastes inermis. Its diet also includes shrimps and crabs. The individuals smaller than 15cm SL consumed mainly shrimps, but on the other hand the individuals larger than 25cm SL consumed mainly fishes. The proportion of fish consumption increased with increasing size of S. marmoratus.

• 한국어류학회지
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• 제11권2호
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• pp.184-190
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• 1999

1996년 2월부터 10월까지 삼중자망에 의해 격월로 채집된 거제도 연안의 어류에 관한 결과는 다음과 같다. 채집된 총 종수는 43종이며, 전제 개체수는 493마리, 전체중량은 89,367.1 g이었다. 개체수와 중량에서 높은 어종은 쥐치 (Stephanolepis cirrhifer), 망상어 (Ditrema temmincki), 쥐노래미 (Hexagrammos otakii), 문치가자미 (Limnanda yokohamae), 조피볼락 (Sebastes schlegeli), 넙치 (Paralichthys olivaceus)였으며, 이들 어종이 전체 개체수에서 61.7% (304마리), 중량은 66.3% (59,251.4 g)을 차지하였다. 본 연구해역에서 채집된 어류는 대부분 연안 정착성 어류이었으며, 소수종은 넙치, 말쥐치, 쥐치, 도다리, 멸치, 참돔과 같은 회유성 어류로 구성되어 있었다. 채집량(개체수)은 수온이 낮은 2월에 가장 낮고, 10월에 가장 높게 나타났으며, 월 다양도지수의 범위는 1.99~2.81로, 6월에 최고치를 나타내었다.

• 한국어류학회지
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• 제26권4호
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• pp.349-354
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• 2014

필리핀 일로일로 주변해역에 출현하는 몽치다래(Auxis rochei)의 위내용물 조성을 연구하기 위하여 2013년 12월에서 2014년 5월까지 매월 채집하였으며 채집된 몽치다래의 총 개체수는 200개체였다. 이들의 가랑이체장(FL)은 11.1~31.2 cm의 범위를 보였다. 위내용물을 분석한 결과 몽치다래는 어류(fishes)를 가장 선호하는 epipelagic feeder로 나타났다. 어류 다음으로 중요한 먹이생물은 새우류(shirmps), 요각류(copepods), 게유생 (crab larvae), 단각류 (amphipods), 두족류 (cephalopods)로 나타났으며, 갯가재류 (stomatopods), 이매패류 (bivalves), 패충류(ostracods) 등도 섭식하였지만 그 양은 많지 않았다. 몽치다래의 섭식패턴에 대한 도해적방법의 결과는 몽치다래가 좁은 섭식폭을 가지며, 어류를 주로 섭식하는 specialized feeder임을 보였다. 모든 크기군에서 어류를 주로 섭식하였으며, 크기가 증가함에 따라 어류의 섭식비율이 증가하는 경향을 보였다.

• 수산해양기술연구
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• 제59권4호
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• pp.301-314
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• 2023

Long term variations of fish assemblage in the coastal waters of Bukchon-ri were determined using samples collected by trammel net from 2012 to 2022. Water temperature increased by 0.4℃ in 2022 that was less then 2012. During the survey period, a total of 95 species (53 families and 15 orders) of fishes were identified, Scorpaeniformes (five families and 22 species) and Perciformes (25 families and 39 species) accounted for 73% of the total number. The number of species was higher in summer than winter, showing a peak in summer at 66 species and lower in winter and autumn at 45 species. The number of individuals and the biomass peaked in summer at 1,238 individuals and 280.1 kg, and were the lowest in autumn at 597 individuals and 155.4 kg. The annual diversity index, evenness index and richness index were appeared 2.11-2.80, 0.64-0.80 and 4.70-7.34 at each years. The dominance index were appeared highest in 2014 while 2021 were appeared the lowest in 2017. The subtropical fishes were identified total of 38 species (40.0%) and the number of species was higher in 2022 at 22 (52.4%) species and lower in 2015-2017 at each 10 (31.3-37.0%) species. The dominant species of subtropical fishes were appeared rabbit fish (Siganus fuscescens), boxfish (Ostracion immaculatus), smallscale blackfish (Girella melanichthys), flag fish (Goniistius zonatus), stripey (Microcanthus strigatus), rock porgy (Oplegnathus punctatus), and bluestriped angelfish (Chaetodontoplus septentrionalis) in study sites.

• 한국어류학회지
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• 제35권2호
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• pp.113-120
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• 2023

이번 연구에 사용된 고등어는 2022년 1, 3~5, 7~9, 11월에 제주도 주변 해역에서 대형선망, 소형선망어업에 의해 어획된 959개체를 이용하였으며, 전장(Total length)과 체중(Body weight)을 각각 0.1 cm와 0.1 g 단위까지 측정한 뒤, 위를 적출하여 먹이 생물의 크기와 무게를 측정하고 가능한 종 수준까지 분석하였다. 위내용물 분석 결과는 상대중요도지수비를 이용하였으며, 계절과 크기군에 따른 먹이조성 변화를 알아보았다. 고등어의 가장 중요한 먹이생물은 난바다곤쟁이류(Euphausiacea)였으며, 그 다음으로 중요한 먹이생물은 어류(Pisces)로 나타났다. 그 외에, 단각류(Amphipoda), 요각류(Copepoda), 새우류(Caridea), 게류(Brachyura), 두족류(Cephalopoda) 등이 출현하였으나, 0.8% 이하의 상대중요도지수비를 보여 그 양은 매우 적었다. 계절별 위 내용물 조성을 살펴본 결과, 봄, 여름, 가을철에는 난바다곤쟁이류를 주로 섭식하였으며, 여름철에 비율이 가장 높게 나타났다. 겨울철에는 어류가 가장 중요한 먹이생물로 나타났다. 또한 크기 군별 위내용물 조성을 알아본 결과, 모든 크기군에서 난바다곤쟁이류가 가장 우점하였으나, 성장함에 따라 난바다곤쟁이류의 비율은 감소하고 어류의 비율이 증가하는 경향을 보였다. 고등어는 성장함에 따라 개체당 평균 먹이생물의 개체수는 통계적으로 유의한 차이를 보이지 않았으나, 먹이생물의 중량은 통계적으로 유의한 차이를 나타냈다.

• Animal Systematics, Evolution and Diversity
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• 제12권1호
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• pp.61-66
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• 1996

한국산 동갈돔과 어류 중 가장 많은 종이 포함된 동갈돔속 어류 중에 지금까지 우 리나라에 기록된 적이 없는 Apogon endekataenia Bleeker와 A. notatus Houttuyn 2종이 제 주도의 서귀포 연안에서 채집되었다. 이들 2종의 국명은 A. endektaenia는 줄동갈돔, A. notatus는 점동갈돔으로 하고, 이들의 계수·계측형질을 사진과 함께 기재하였다. 그리고 두 종을 포함하여 한국에서 기록된 동갈돔속 9종의 검색표를 함께 제시하였다.

• 한국수산과학회지
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• 제39권spc1호
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• pp.142-150
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• 2006

We examined the effect of predation by observing the changes in macrobenthic communities in a tidal flat at Seonjae, Korea, following the exclusion of large predators such as birds, fishes and crustaceans using protective screens. We conducted two interference experiments in the field from April to November 2004: (1) Experiment 1 was conducted at a mid-tidal flat in the western part of Seonjae-do, Incheon, Korea, (2) Experiment 2 was set up at a low tidal flat in the eastern part of Seonjae-do. predator exclusion showed different effects in the two experiments. Both the number of species and density were reduced by 20% in Experiment 1. Whereas in Experiment 2, they increased by up to 13% and 69%, respectively. In Experiment 1, a high density of brachyuran crabs observed in the treatment may have caused the difference in community composition between the treatment and the control, and this probably resulted from active predation of macrofauna (e.g., small crabs) under protection from megafaunal predators such as birds and fishes. However, in Experiment 2, as typically observed in other predator exclusion experiments, a lower density of benthic predators and the subsequent reduction of over predation probably resulted in a more diverse and abundant benthic community in the treatment. We confirmed that predation was a contributing factor in the formation of the macrobenthic community. We also demonstrated relationships that exist among different trophic groups (large predators, macrobenthic predators and prey) and what effects and responses occur in each component of the tidal flats.