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영일만(迎日灣) 표영군집내(漂泳群集內)의 (210)Po 축적(蓄積)
서해립 ( Hae Lip Suh ),김성수 ( Seong Soo Kim ),고유봉 ( You Bong Go ),남기완 ( Ki Wan Nam ),윤성규 ( Sung Gyu Yun ),윤양호 ( Yang Ho Yoon ),조수근 ( Soo Gun Jo ),홍재상 ( Jae Sang Hong ) 한국수산학회 1995 한국수산과학회지 Vol.28 No.2
1993년 여름 영일만에서 채집한 해수, 플랑크톤, 어류 내의 천연 방사성 핵종 (210)Po 농도를 조사했다. 해수중의 평균농도는 1.9mBq/l이었고, 용존성의 비율은 46%였다. 식물플랑크톤 세포수의 95% 이상을 차지한 중심목 규조 Skeletonema costatum의 농축계수는 7.6×10(4)이었다. 동물플랑크톤 다섯 종을 조사했는데, 그 가운데 요각류와 곤쟁이류 두 종씩 모두 네 종의 농도범위는 210~584mBq/g (건조중량)이었으나, 요각류 Labidocera bipinnata는 2,070mBq/g으로 예외적으로 매우 높았다. 이 자료에서 L. bipinnata가 육식성 포식자로 나타났다. 어류 幽門盲囊의 (210)Po 농도와 농축계수는 따로따로 2,979~3,810mBq/g과 3.4~4.3×10(6)이었다. 생물체내 (210)Po의 농축계수는 식물플랑크톤〈여과섭식 요각류〈잡식성 곤쟁이류〈육식성 요각류〈浮魚類 順이었다. A study was made of the concentration of the naturally occurring radionuclide (210)Po in seawater, plankton and fishes collected from Yongil Bay, Korea, in summer 1993. The mean value of the (210)Po concentration in sea water was determined to be about 1.9mBq/l, with the proportion of the dissolved forms being about 46%. The mean (210)Po concentration factor in the centric diatom Skeletonema costatum, comprises > 95% of the total phytoplankton cell number, was 7.6×10(4). Of five species of zooplankton examined, four species (two copepods and two mysids) had (210)Po concentrations in the range of 210~585mBq/g dry weight. A copepod Labidocera bipinnata, however, was exceptional with a particularly high (210)Po level of 2,070mBq/g. This indicates that L. bipinnata is primarily a raptorial feeder. The concentration of (210)Po in the pyloric caecum of pelagic fishes was 2,979~3,811mBq/g, with the concentration factors of 3.4~4.3×10(6). The food chain concentration of (210)Po occurred as follows: phytoplankton < filter feeding copepods < omnivorous mysids < raptorial copepod < pelagic fishes.
돌산도 쇄파대에 사는 쿠마류 Bodotria biplicata 의 조하대 대상분포
서해립(Hae Lip Suh),구영경(Young Kyung Koo) 한국수산과학회 1997 한국수산과학회지 Vol.30 No.1
Subtidal zonation of a cumacean Bodotria biplicata was investigated in the sandy shore surf zone of Dolsando, southern Korea. Three replicate samples were taken with a sledge net at three sites, such as the surface and bottom of 1 m depth and water`s edge, at hourly intervals over the neap and spring tide cycles on January 1993 (n=225). B. biplicata, the most dominant cumacean in this area, exhibited peak density at the bottom while about 0.6% of total catch was collected at the surface. Mean density during the neap tide cycle was slightly higher than that during the spring tide cycle. The depth of subtidal zone influenced the total catch of 8. biplicata. The changes in density were related to the depth of subtidal zone rather than day-night cycle or ebb-flood tide. The results obtained in this study suggest that the diel vertical migration is not distinct. During both neap and spring tide cycles, B. biplicata attained a density maximum at the same level of about 90 ㎝ below lower low water (LLW). It is likely, therefore, that this species performs shore- and seaward horizontal migration fortnightly. The speed and distance of migration may be directly related to the beach slope and tide range. Ontogenetic differences in subtidal distribution were observed. Juveniles and manca larvae tended to occur lower areas than the adults. Such differences may reduce intraspecific competition for diets.
돌산도 모래해안 쇄파대에 사는 저서성 단각류의 겨울철 대상분포
서해립(Hae Lip Suh),유옥환(Ok Hwan Yu) 한국수산과학회 1997 한국수산과학회지 Vol.30 No.3
Sledge net samples were taken over the neap and spring tide cycles in January 1993 from the bottom and surface of 1 m depth and at the water`s edge in the sandy shore surf zone of Dolsando, southern Korea. Zonation pattern of three dominant gammarid amphipods was compared. The amphipods were more abundant on the bottom and at water`s edge than in the surface. Average densities at both sites of Pontogeneia rostrata and Allorchestes angusta were higher during the neap tide than the spring tide, whereas that of Synchelidium lenorostralum was lower during the neap tide. P. rostrata migrated horizontally during the flooding and ebbing tides, but S. lenorostralum and A. angusta did not. Unlike other species, P. rostrata was significantly more abundant at night, suggesting its active nocturnal movement. During flooding tide, P. rostrata was not found on the shore above the mean sea level (MSL) during daytime, but found in 100 ㎝ above MSL at night. Zonal distribution of P. rostrata which was restricted from MSL to 250 ㎝ below MSL, however, did not vary with the day-night cycle during ebbing tide. S. lenorostralum and A. angusta were not found during flooding tide but ebbing tide. The upper distribution limit of the former was 150 ㎝ below MSL, and the distribution of the latter ranged from MSL to 150 ㎝ below MSL. The highest densities of P. rostrata, S. lenorostralum and A. angusta were 32, 26 and 3 ind. m^(-2), respectively. We discussed the relationships between the distribution pattern of three dominant species of gammarid amphipods and their life styles in the sandy shore.
서해립,조수근,김광용,Suh, Hae-Lip,Jo, Soo-Gun,Kim, Kwang-Young The Korean Society of Oceanography 1995 韓國海洋學會誌 Vol.30 No.6
The mysids, Archaeomysis kokuboi and Acanthomysis sp., clearly exhibited the diel patterns of interspecific horizontal migration in the surf zone at a sandy shore in Yongil Bay, eastern Korea. Shoreward migration of Acanthomysis sp. at sunset resulted in the presence of significantly high numbers of mysids after dark at the bottom of 1 m depth. At first light, Acanthomysis sp. moved back to deeper water of>1 m depth in conjunction with a reverse migration by A. kokuboi. In the afternoon, A. kokuboi moved to offshore, then these species remained there. Although A. kokuboi has been considered an intertidal species in the exposed beaches with strong wave action, this is not the case in a sandy beach of Yongil Bay. We suggest that evidence for behavioral adaptation comes from the response of k. kokuboi to the sheltered beaches with weak wave action. The habitat shifts presumably provide this species with high availability of food materials in the surf zone.
서해립,SUH, HAE-LIP The Korean Society of Oceanography 1994 韓國海洋學會誌 Vol.29 No.1
The fish host, Acanthogobius hasta, was sampled monthly (April 1990 to March 1991) from Wando Islands, Korea, and examined for the parasitic Copepod Acanthochondria brevicorpa. Prevalence was positively correlated with fish length; parasitic copepods were only found in fishes > 24 cm TL. distinct seasonal variation in prevalence and intensity of A. brevicorpa infection was observed, although no data were available in April, June and July 1990 when no A. hasta was caught. Averaged over all samples, of the 83 fishes caught, 34.9% were infected with a mean intensity of 3 copepods per host No A. brevicorpa was found on the host between August and October. Ovigerous females of the Copepod were found between February and May, with an abundance peak in May. Young copepodids (Ci to CIII) of A. brevicorpa were not present throughout the year, but only late copepodids of CIV and CV were found on the fish in March and May. Results from the present study suggest that A. brevicorpa mainly produces larvae in spring, and may have a life cycle including additional hosts.
최상덕,서해립,홍성윤,Choi Sang-Duk,Suh Hae-Lip,Hong Sung-Yun 한국양식학회 1996 韓國養殖學會誌 Vol.9 No.2
Two species of the copepod parasite were observed from two marine fishes in Korea. A siphonostomatoid copepod Neobrachiella incurva (Shiino, 1956) (Lernaeopodidae) and a cyclopoid copepod Peniculus ostraciontis Yamaguti 1939 (Lernaeidae) were found on the gills of Halichoeres poecilopterus and the fins of Sebastes schlegeli, respectively. The most distinct features of N. incurva are bipartite of maxillule, 2 ventro-posterior processes and conical genital process. P. ostraciontis is very distinguishable in the body shape, antenna, and fused trunk. Both species of copepods are newly observed from the Korean waters.