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      • 하계(夏季) Alaska만(灣)과 Bering해(海)의 Copepods의 분포조성(分布組成)

        이삼석,Lee, Sam Seuk 한국해양학회 1980 韓國海洋學會誌 Vol.15 No.1

        The materials were obtained in the eastern Gulf of Alaska and the south- eastern Bering Sea during the cruise of the research vessel, Ohdae San, from July to October 1978. A total of 76 samples were taken by NORPAC net from a depth of 200 meters or less in coastal areas. 1. The surface water temperature in the coastal waters, varing from 9 to 10$^{\circ}C$, was lower than that in offshore waters which varied from 10 to 12.9$^{\circ}C$ in the eastern Gulf of Alaska. Thermocline was formed in the 30∼50 meter layer. Salinity of the coastal waters of Kenai Peninsula and Kodiak was 30 which was slightly lower than that of offshore. 2. The water temperature of the surface layer down to 30 meters varied from 7 to 10$^{\circ}C$ and from 1 to 9$^{\circ}C$ in the layer below 30 meters in the south-eastern Bering Sea. Meandering thermal front spread from the Alaska Peninsula to St. Matthew Island by way of St. Paul, and a thermocline was found at the 30∼50 meter layer Salinity ranged from 31.0 to 33.0 and that of northern and coastal waters was little lower than that of offshore. 3. Zooplankton biomass fluctuated from 0.1 to 23.6cc/10㎥ in the eastern Gulf of Alaska and 2.0 to 26.1cc/10㎥ in the south-eastern Bering Sea. Plankton was rich in the following areas, the inshore Kodiak waters, the northern Bering Sea, the Coastal waters and waters adjacent to Alutian islands however, poor in the central Bering Sea. In general, the south-eastern Bering Sea has a higher concentration of plankton volume than the eastern Gulf of Alaska. 4. Twenty three species representing 17 genera of copepods were identified from the samples. These were mostly composed of the cold water species, such as Pseudocalanus minutus, Acartia longiremis, Metridia lucens and Eucalanus bungii var. bungii. 5. The cold oceanic species were composed of Calanus cristatus, C.plumchrus, Metridia lucens, Eucalanus bungii var. bungii and Scolecithricella minor. The cold neritic species were Centropages abdominalis, Pseudocalanus minutus, Acartia longiremis, Eurytemora herdmanii, Pontella pulvinata, P. longipedata and Tortanus discaudatus. On the other hand, the warm oceanic species were Calanus tenuicornis and Oithona plumifera. The cosmopolitan species were Calanus finmarchicus and Oithona similis. 6. It was suggested that the cold oceanic species, Eucalanus bungii var. bungii and Metridia lucens in the south-eastern Bering Sea can be recommended as a valuable indicator species for finding the fishing grounds of demersal fish such as pollock and yellowfin sole in this area.

      • KCI등재

        한국 연안의 요각류 중 Acartia clausi 로 분류되어지고 있는 종에 대한 재검정 및 분포에 대한 연구

        이삼석,강영실 한국수산학회 1990 한국수산과학회지 Vol.23 No.5

        한국 연안에서 보고되고 있는 Acartia clausi를 부산 연안역에서 채집된 종으로써 재검정하였다. 그 결과 지금까지 A. clausi로 분류되어졌던 종이 Acartia omorii이거나 A. hudsonica임이 밝혀졌다. 수컷의 경우, 제5각 오른쪽 세번째 마디절 내측에 있는 융기부의 형태에서 두종간의 뚜렷한 차이를 찾을 수 있다. A. omorii는 융기부의 아랫부분이 만곡되어 있으며, A. hudsonica는 원형으로 돌출되어 있다. 암컷의 경우, 생식절의 폭에 대한 길이의 비가 두종간 중요한 분류 형질이 된다. 또한, A. omorii의 경우, 後體部의 두번째 마디절 등쪽 끝에 1∼3개의 소극을 가진 것이 특징이다. 한국 연안 8개의 지점에서 분포를 파악해 본 결과 A. omorii는 모든 조사지점에서 출현하였고, A. hudsonica는 부산 연안역에서만 출현하였다. A neritic copepod previously known as Acartia clausi Giesbrecht in the Korean waters was taxonomically re-examined, and the species has been identified as Acartia omorii and Acartia hudsonica. These species are easily discriminated by the morphology of the 3rd segment of the 5th right leg in male and by the shape of the genital segment in female. A. omorii occurs along the coast of Korea, and A. hudsonica is restricted to the brackish waters of Pusan area.

      • KCI등재

        황해 동남 해역의 수괴지표성 요각류 및 모악류의 분포와 수괴특성

        박주석,이삼석,강영실,이병돈,허성회,PARK Joo-Suck,LEE Sam-Seuk,KANG Young-Shil,LEE Byung-Don,HUH Sung-Hoi 한국수산과학회 1992 한국수산과학회지 Vol.25 No.4

        수괴지표성 요각류 및 모악류의 분포, 군집구조 그리고 요인분석으로써 황해 동남 해역에 분포하는 수괴의 시공간적 변동 및 특성을 밝혔다 본 연구에서는 요각류인 Undinula darwini, Lucicutia flavicornis, Pleuromamma gracilis와 모악류인 Sagitta enflata는 난류 외양성 종으로, Euchaeta russelli 와 Euchaeta plana는 난류성이나 내성이 강하여 분포 범위를 넓게 가지는 종으로, Sagitta wassa는 연안성 종으로, Sagitta bedoti는 혼합성 종으로 그리고 Centropages abdominalis는 연안 저온성 종으로 특성 지어졌으며, 이들의 분포로써 수괴를 분석하였다. 2월의 경우, U. darwini, L. flavicornis, P. gracilis, E. russelli, E. plana 그리고 S. enflata가 출현하는 제주도 서방, 수온 $14^{\circ}$ 이상인 해역이 쿠로시오 난류 수괴로, 수온 $10^{\circ}$이하이며, C. abdominalis가 출현하는 진도 이북해역이 황해 냉수괴로 나타났다. E. plana와 E. russelli가 소량 출현하며, 혼합성 종인 S. bedoti가 출현하는 수온 $12-14^{\circ}$인 제주도-진도간 해역은 혼합 수괴인 것으로 나타났다. 8월의 경우, 수온 약층을 경계로 하여 0-20m층과 20m- 저층으로 분리하여 수괴를 분석하였다. 0-20m 층의 경우, E. plana와 E. russelli가 출현하는 대흑산도까지 난류가 미치며, 집괴 분석 및 수괴지표성 종의 분포로써 볼 때 수괴는 연안에서 외양으로 가면서 크게 대별되어졌다. 20m-저층의 경우, 난류성 종인 E. russelli와 E. plana가 출현하며 수온이 $12^{\circ}C$이상인 제주도 서북방 해역이 난류의 영향을 받는 해역으로 나타났으며, 저온성 종인 C. abdominalis가 출현하는 진도 이북 해역이 황해 냉수괴인 것으로 나타났다. 하계 0-20m층의 진도부관 해역 및 20m- 저층의 진도 이북 해역에서 C. abdominalis가 출현하는 것으로 보아 냉수괴가 존재하는 것으로 나타났다. Distribution of indicator species of copepods and chaetognaths were studied as an indicator species of water mass in the southeastern area of the Yellow Sea. Undinula darwini, Lucicutia flavicornis, Pleuromamma gracilis, Euchaeta resselli, Euchaeta plane and Sagitta enflata were found to be reliable indicator species for determining warm water mass. Of these species, E. plana and E. rusrelli have a weak tolerance on the low temperature. Sagitta crassa was indicator species of neritic waters; Sagitta bedoti was that of mixing waters. Centropages abdominalis represented neritic cold waters. In February, U darwini, L. flavicornis, P. gracilis, E. russelli, E. plana and S. enflata occurred in the western waters of Cheju-Do where warm waters over $14^{\circ}C$ occupied. Centropages abdominalis occurred in the northern area beyond Chindo with water temperature less than $10^{\circ}C$. E. plana, E. russelli and S. bedoti were found at the regions between Cheju-Do and Chindo where the water temperature was $12- 14^{\circ}C$ corresponding to the mixing waters. Based on cluster analysis and T-S diagram in February three different water masses were identified from the south to the north. In August, water masses were analyzed at two different layers, 0-20m and 20m- bottom layers, separated by bhermocline depth. In 0-20m layer, E. plana and E. russelli were found from the western waters of Cheju-Do to Daehuksando. In 20m- bottom layer, E. russelli and E plena occurred at the northwestern waters of Cheju-Do with the water temperature warmer than $12^{\circ}C.\;C.$ abdominalis was found at the northern area beyond Chindo. Based on the cluster analysis and T-S diagram in August three different water masses at 0-20m and 20m-bottom layers were identified from the coast to the offshore. C. abdominalis was found at the adjacent water of Chindo at 0-20m layer and the northern area beyond Chindo at 20m~bottom layer. This fact suggested that the cold water mass existed at tile adjacent waters of Chindo in summer.

      • 황해 동남 해역의 수괴지표성 요각류 및 모악류의 분포와 수괴특성

        박주석,이삼석,강영실,이병돈,허성회 동의대학교 기초과학연구소 1993 基礎科學硏究論文集 Vol.3 No.1

        Distribution of indicator species of copepods and chaetognaths were studied as an indicator species of water mass in the southeastern area of the Yellow Sea. Undinula darwini, Lucicutia flavicornis, Pleuromamma gracilis, Euchaeta resselli, Euchaeta plana and Sagitta enflata were found to be reliable indicator species for determining warm water mass. Of these species, E. plana and E. russelli have a weak tolerance on the low temperature. Sagitta crassa was indicator species of neritic waters: Sagitta bedoti was that of mixing waters. Centropages agdominalis represented neritic cold waters. In February U. darwini, L. flavicornis, P. gracilis, E. russelli, E. plana and S. enflata occurred in the western waters of Cheju-Do where warm waters over 14℃ occupied. Centropages abdominalis occurred in the northern area beyond Chindo with water temperature less than 10℃. E. plana, E. russelli and S. bedoti were found at the regions between Cheju-Do and Chindo where the water temperature was 12∼14℃ corresponding to the mixing waters. Based on cluster analysis and T-S diagram in February three different water masses were identified from the south to the north. In August, water masses were analyzed at two different layers, 0∼20m and 20m∼bottom layers, separated by thermocline depth. In 0∼20m layer, E plana and E. russelli were found from the western waters of Cheju-Do to Daehuksando. In 20m∼bottom layer, E. russelli and E. plana occurred at the northwestern waters of Cheju-Do with the water temperature warmer than 12℃. C. abdominalis was found at the northern area beyond Chindo. Based on the cluster analysis and T-S diagram in August three different water masses at 0∼20m and 20m∼bottom layers were identified from the coast to the offshore. C. abdominalis was found at the adjacent water of Chindo at 0∼20m layer and the northern area beyond Chindo at 20m∼bottom layer. This fact suggested that the cold water mass existed at the adjacent waters of Chindo in summer.

      • Taxonomy and distribution of Corycaeidae (Copepoda: Cyclopoida) in the Korean Waters in Summer

        강영실,허성회,이삼석,KANG, YOUNG SHIL,HUH, SUNG-HOI,LEE, SAM SEUK The Korean Society of Oceanography 1990 韓國海洋學會誌 Vol.25 No.2

        The family Corycaeidae in the neighbouring seas of Korea was taxonomically studied based on the zooplankton samples collected in August, 1986. In this study, nine species belonging to two genera and three subgenera of the Corycaeidae were identified and described with illustrations; Corycaeus (Corycaeus) speciosus, G.(C.) crassiusculus, C. (Ditrichocorycaeus) affinis, C.(D.) andrewsi, C.(D.) erythraeus, C.(Onychocorycaeus) pacificus, c.(O.) catus, C.(O.) agilis, and Farranula gibbula. The distribution patterns of these species showed that C.(D.) affinis appeared to be and indicator species of the coastal waters, and C.(C.) speciosus, C.(C.) crassiusculus, c.(O.) catus, C.(D.) andrewsi, and Farranula gibbula appeared to be indicator species of the warm-oceanic waters.

      • KCI등재

        한국 동해 중부 해역의 지표성 요각류 및 모악류의 분포와 수괴 특성

        박주석,허성회,이삼석,강영실 한국수산학회 1991 한국수산과학회지 Vol.24 No.3

        요각류와 모악류 중 주요 수괴 지표종의 분포에 근거하여 한국 동해중부해역의 수층별 수괴의 시·공간적 변동을 밝히기 위하여 14개의 정점에서 2월과 8∼9월에 폐쇄망으로 수층별로 동물 플랑크톤을 채집, 분석하였다. 요각류 중 난류 외양성 종인 Pleuromamma gracilis, Calanus tenuicornis와 모악류의 Sagita enflata및 S. minima, 한류성 종인 Calanus cristatus, Calanus plumchrus및 S. elegans 그리고 심해 한해성 종인 Gaetanus armiger의 분포와 수괴 변동과의 관계를 밝혔다. 0∼100m 수층에서는 한류성 종인 C. cristatus, C. plumchrus및 S. elegans의 분포로써 북한한류 세력이 주문진 연안까지 강하게 영향을 미치는 것을 밝혔다. 주문진-죽변이북 연안해역에서 S. elegans는 출현하지 않다가 죽변연안에서 다시 출현하는 것은 동한난류의 강한 연안측 침투로 북한한류는 하층으로 잠입되고 표층에서 주변해역보다 약 2∼4℃ 높은 고온수가 분포하기 때문이다 난류종인 S. enflata의 출현역시 이를 뒷받침하고 있다. 100∼300m 수층에서는, 2월의 경우 울릉도 서북방해역이 동한난류의 영향을 받는 수괴임을 C. tenuicornis와 P. gracilis의 분포로써 입증하였으며, 8∼9월의 경우, 동한난류의 영향을 받는 울릉도 서북방해역과 북한한류수계인 속초-주문진 연안역 사이에 혼합성을 띈 수괴가 존재하는 것을 S. bedoti의 분포로써 밝혀졌다. 300∼500m 수층의 경우, 2월과 8∼9월 모두 S. bedoti와 S. enflata의 출현수역인 울릉도 서북방을 제외하고는 모두 동해고유수괴가 존재하는 것으로 나타났다. 8∼9월에 있어서 전선역에 혼합종인 S. bedoti가 풍부한 반면, 난류종인 S. minima와 S. enflata가 없거나 아주 소량 출현하는 것은 수괴 배치이동과 잘 일치하르로, 이들은 전선형성을 밝히는데 유용한 지표종들이었다. Zooplankton samples were collected vertically from different layers with a closing net at 14 stations in the middle East Sea of Korea in February, August and September to study distribution of biological indicators for analysis of water masses. Horizontal and vertical distributions of important species of copepods and chaetognathas known as indicator species were closely related to distributions of different water masses and oceanic fronts. Pleuromamma gracilis, Calanus tenuicornis, Sagitta enflata and Sagitta minima were found to be reliable indicator species to determine warm water mass with warm core, and Calanus cristatus, Calanus tonsus and Sagitta elegans could be used as cold water species for evaluating the movement of cold current from North Korea, and Gaetanus armiger was deep sea water species. Therefore, it was found that North Korean Cold Current down to the south along the coast appeared to be significant in the surface around Chumunjin area, and from here towards the south the cold water containing S. elegans submerged under warm water with S. enflata which were about 2∼4℃ higher than that of the vicinity and reappeared near Chukpeon area in surface layer. In the layer between 100m and 300m depths, distribution of Pleuromamma gracilis and Sagitta bedoti indicated that warm water mass and front zone influenced by the different water systems were formed in northwestern area off Ulreung-do. In 300∼500m layer, the proper cold water could be estimated to be present in the northwestern area off Ulreung-do throughout the survey period by the high abundance of Gaetanus armiger. In August, distributions of S. bedoti, S. enflata and S. minima were valuable index to find oceanic fronts and warm core.

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