• Animal cells and systems
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• 제9권3호
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• pp.135-138
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• 2005

The first zoea of Eriphia sebana is described and illustrated in detail for the first time. Its morphological characteristics are compared with those of other known species of the Menippidae from the northwestern Pacific Ocean. The general morphology of it corresponds well with other known zoeas of the Menippidae, except that of Sphaerozius nitidus. It is found that the zoeas of E. sebana and E. smithi can be separated by the exopod of the antenna, which has three setae in E. sebana and four setae in E. smithi.

• 대한수학회지
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• 제49권4호
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• pp.843-854
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• 2012

In this paper, the iterative Uzawa method with a modified Lagrangian functional is investigated to seek a saddle point for the semicoercive variational Signorini inequality.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 추계 수산관련학회 공동학술대회발표요지집
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• pp.26-27
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• 2001

Two sea survey instruments were introduced: continuous underway fish egg sampler (CUFES) and an airborne light detecting and ranging (LIDAR) for survey of epiplegic fish. We have used CUFES in ichthyoplankton surveys primarily for Pacific sardine (Sardinop sagax) eggs off California since 1996 and it is also being used in many parts of world for sardine and anchovy egg surveys. (omitted)

• Journal of the korean society of oceanography
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• 제33권3호
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• pp.90-99
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• 1998

Butyltin and phenyltin residues were quantified in seawater and biota of the Chinhae Bay System, Korea in 1995. Butyltin compounds were detected in all seawater and biota samples, whereas phenyltin compounds were found only in the biota samples. Tributyltin (TBT) concentrations in seawater ranged from < 8-35 ng Sn/l. Tributyltin concentrations in Crassostyea gigas and Thais clavigera ranged from 95-885 and 23-414 ng Sn/g, respectively, Triphenyltin(TPhT) concentrations in each species ranged 155-678 and 46-785 ng Sn/g, respectively. Spatial distribution of TBT was closely related to boating and dry-docking activities. However, spatial distribution of TPhT was not consistent with that of TBT. The biological concentration factor for TBT in C. gigas was about 25000 that is four times greater than that of T. clavigera. Butyl- to phenyltin concentration ratio was greater than one in C. gigas, but that in T. clavigera was less than one. Major tissues of C. gigas also showed different accumulation patterns for butyl- and phenyltin compounds. Furthermore, 19 and 28% of total body burdens of TBT and TPhT were found in gonadal mass of C. gigas just prior to spawning.

• 한국해양학회지:바다
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• 제6권4호
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• pp.234-241
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• 2001

1999년 동해 해양 탐사에서 관측된 자료를 이용하여 동해에서 수심에 따른 탄산칼슘의 포화도 변화를 분석하였다. 해수의 칼슘 농도는 염분 측정값으로부터 계산하였으며, 탄산염 농도는 총알칼리도와 수소이온농도 측정값을 이용하여 계산하였다. 동해의 해수는 방해석에 대하여 약 200${\sim}$400m보다 얕은 곳에서는 과포화 되어있고, 그보다 깊은 곳에서는 불포화 되어있다. 아라고나이트의 경우에는 약 100${\sim}$300 m보다 얕은 곳에서는 과포화 되어 있고 그보다 깊은 곳에서는 불포화되어 있다. 대양에 비교하여 동해의 포화깊이가 낮은 이유는 동해의 낮은 수온 때문으로 추정된다.

• 대기
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• 제14권1호
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• pp.4-23
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• 2004

To monitor the world's oceans and understand the role of the oceans for climate change, an Array for Real-time Geostrophic Oceanography (ARGO) program has been carried out since year 2000. Autonomous profiling floats of about 820 are reporting the vertical temperature, salinity, and pressure profiles of the upper 2000 m underwater at regular time intervals. Meteorological Research Institute (METRI) of Korea Meteorological Administration (KMA) launched 45 floats at the East Sea and the western Pacific to understand characteristics of water properties and develop the global ocean observation system as a part of international cooperation project. In this study, we introduce ARGO program, METRI-ARGO and the features of APEX float itself and their data formats. We also describe the significant points to be considered for using ARGO data.

• 수산해양기술연구
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• 제35권3호
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• pp.243-249
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• 1999

Specificity of catches has been analyzed to japanese tuna purse seine A principle component analysis was used to improve the efficiency of fishing and increase sustainable production and productivity of Korean tuna purse seine.The result are as follows;From the principal component analysis of the fish catches, the first principal component(Z1) to promote principal component score was skipjack Kastsuwonus Pelamis, LINNAEUS and yellowfin tuna Thunnus Albacares, BONNATERRE (Small : smaller than 10kg) and proportion was 86.8% of total. The second principal component(Z2) to increase principal component score was yellowfin tuna (Large : larger than 10kg) and proportion was 9.5%.On the other hand, fish operating that have caught skipjack and yellowfin tuna (Small and Larger) was not so much. Fish catches for one species raised volume of the catches while catches for multi-species decreased it since principal composition score for one species and both species together has been increased.Fish school could be divided into three groups of schools each of which was associated with drift objects, payaho and ship, school associated with shark, whale and porpoise and school of breezing, feeding and jumping from proportion of principal component analysis for fish catches of school types. However, the biological pattern is different among school associated with ship, payaho and school associated with drift objects for analysis eigen vector. School associated with ship, payaho and school associated with drifting object associated is judged as school which be assembled to vessel and drifted log temporary.

• 한국해안해양공학회지
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• 제6권1호
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• pp.94-108
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• 1994

연근해에서의 위성고도계 자료의 정확도가 향상됨에 따라 기존에 잘 알려져 있는 Schwiderski의 전구적 모형보다 더 정확한 조석모형으로 위성고도계 자료에서의 조석성분에 대한 보정을 향상시킬 필요가 있다. 초기단계로 오오츠크해, 남중국해와 북서태평양역을 포함하는 동아시아 전 해역에 대해 기존의 조석모형보다 해상도가 높은 1/6도 격자체계의 조석모형을 수립하여 반일주조(M$_2$, S$_2$, $N_2$, $K_2$)와 일주조(K$_1$, $O_1$, P$_1$, Q$_1$)의 조석체계에 대한 수치모형실험을 수행하였다. 계산된 결과들과 이 해역에서의 관측치와 기존의 경험적 조사도 및 Schwiderski의 조석도와 비교분석이 이루어졌다.

• Ocean and Polar Research
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• 제28권4호
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• pp.467-473
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• 2006

The EM 120, a newly installed multibeam echo sounder on RM Onnuri, has several advantages over the previously installed SeaBeam 2000 in performance and thus data quality. The EM 120 system provides a bottom topographic map with high resolution by (1) increasing the number of beams, (2) increasing the across track swath range, (3) measuring the more accurate sound velocity within the water column, and (4) improving stabilization for pitching, rolling, and yawing of the ship. This study compares EM 120 and SeaBeam 2000 echo sounders in terms of the data quality from the same survey area in the Clarion-Clipperton Zone, NE Pacific. Our result shows that the EM 120 provides more precise topographic data than the SeaBeam 2000. Although overall trends of data, such as topographic direction and relief, are similar for both echo sounders, the water depths measured by the EM 120 are shallower than that of SeaBeam 2000 by 80 to 90 meters.

• Ocean and Polar Research
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• 제28권1호
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• pp.13-23
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• 2006

This study was conducted to investigate the community structure and distributional pattern of meiobenthos on the sediment of the mangrove forest and seagrass bed in the Chuuk lagoon. The samples were collected by an acryl corer at 14 stations. Nematodes were the most abundant meiobenthos, followed by ciliophorans and polychaetes; these taxa comprised more than 70% of the total abundance at all stations. The meiofuuna sampled in seagrass bed were more diverse than those of mangrove substrates. Total densities were higher in mangrove stations than other sites, averaging 1,671 to $2,967inds/10cm^2$. Densities in seagrass area ranged between 605 and $1,053inds/10cm^2$. Biomasses, however, were higher in seagrass bed $(975-2,167{\mu}g\;free\;dry\;weight/10cm^2)$ than in mangrove area $(1,064-1,180{\mu}g\;free\;dry\;weight/10cm^2)$. Ordination chart by MDS of major meiofaunal density in each station showed difference between mangrove area and seagrass area in terms of habitat of meiobenthos.