• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.05a
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• pp.292-294
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• 2018

부산신항 물동량 증가 및 선박의 초대형화로 인해 가덕수도의 혼잡도가 증가되고 있으며, 지속적인 항만 개발로 인해 공사투입 선박으로 인한 위험도도 높아지고 있다. 특히, 가덕수도 내 주의해역은 선박의 교차항행 위험도가 높은 구역으로 선박 통항안전 향상을 위한 법률적, 관제적 측면의 보완방법을 제시하였다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.361-362
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• 2000

해양의 대형무척추동물은 어류의 먹이가 되고, 서식처나 먹이를 놓고 어류와 경쟁을 하며, 심지어 어류를 포식하는 등 어류 군집 구조에 많은 영향을 주는 생물적 요인이 된다. 새우류는 절지동물문 갑각목 십각아목에 속하는 무척추동물이며, 국내에서 이루어진 새우류 군집에 관한 연구는 광양만 잘피밭에 서식하는 새우류 군집의 종조성과 계절 변동 (Huh and An, 1997), 고리 주변 해역 새우류의 종조성과 계절 변동(Huh and An, 1999)이 있을 뿐 아직까지 우리나라 연안에서 출현하고 있는 새우류의 군집 연구가 부족한 상태이다. 본 연구에서는 가덕도 주변 해역에서 출현하는 새우류 군집의 종조성과 계절변동을 파악함으로써 상위 영양단계를 점유하고 있는 어류 군집을 연구하는데 기초 자료를 제공하고자 하였다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.396-397
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• 2000

게류는 절지동물문 갑각목 십각아목에 속하는 무척추동물로서 해양동식물의 사체나 데트리터스를 먹으며 해양생태계의 먹이그물에서 중요한 생태적 지위를 갖는다. 조간대에 서식하는 종은 육상과 조하대 사이, 하구역에 서식하는 종은 담수와 해수사이, 심해에 서식하는 종은 표층과 심층 사이의 물질과 에너지 순환을 제공한다. 국내에서 이루어진 게류에 관한 연구는 주로 일부 상업성 종류의 자원학적 연구만 이루어져 있고, 군집에 관한 연구는 광양만 잘피밭에 서식하는 게류 군집의 종조성과 계절 변동 (Huh and An, 1998)이 있을 뿐 아직까지 우리나라 해역에 어떤 종이 언제 출현하는지 조차 잘 알려져 있지 않다. 본 연구에서는 가덕도 주변 해역에 서식하는 게류 군집의 종조성과 계절변동을 파악하고자 하였다. (중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.414-416
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• 2013

부산항 신항의 기항 선박수가 증가 함에 따라 가덕수도 LANBY 남쪽 해상은 가덕수도를 출입하는 선박의 밀집도가 높아지고 있다. 해당해역은 여러 방향에서 출입하는 선박들로 인해 해상교통의 흐름이 원활하지 못하며 남해안으로의 이동 선박은 지세포 앞 정박선들 사이를 통과하여 항해하고 있어 선박 충돌사고의 위험성이 높다. 이동 선박의 원활한 흐름과 지세포 앞 정박선과의 위험성 감소를 위해 항로의 설정이 필요하다. 항로의 설정 방법으로 SOLAS 제5장 10규칙에 따라 가덕수로에서 남해안 방향과 일본 방향으로 두개의 추천항로를 설정할 것을 제안하다. 추천항로는 법적 구속력은 없지만, 선원의 상무로서 항해자는 추천항로의 우측으로 일정 거리만큼 떨어져 항해하여야 한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 1998.06a
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• pp.333-333
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• 1998

• 한국해양학회지
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• v.9 no.2
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• pp.19-30
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• 1974

Current observations were carried out in Jinhae Bay area during the period of January to February 1974. The data were synthetically analyzed and the characteristics of the water movement in Jinhae Bay were studied. The water movement in Jinhae Bay area is a reversing tidal current type and the Semi- diurnal tidal current is predominant. The ebb current begins at about high water time and the strongest current occurs at about 3 hour after high water. The flood current begins at 0.2-1.0 hour before low water and the strongest current occurs at about 3-4 hour after low water. The main ebb current flows to SE direction with the maximum welocity, about 100cm/sec and the lood flows to NW with the maximum velocity, about 70cm/sec. Generally, the ebb current in Jinhae Bay is more predominat than the flood current except at the west and the north coast area of Gadeog-do where the flood current is more predominant.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.8 no.4
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• pp.305-313
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• 1996

CTD measurements were conducted in the Nakdong estuary on the several sections or along-plume and cross-plume directions in 1993 and 1994. Internal Froude number Fi=0.22-0.35 in ebb tides and 0.14 in flood tides suggest that Nakdong river plume may go farther seawards in the along-plume direction with little mixing with the adjacent sea water after the construction of Nakdong river barrier. From Dadae-Po to Gaduk-Do section of cross-plume direction, three cores of low salinity were found. The main plume outflows from the newly made channel by cutting Ulsuk-Do after the construction of barrier. The low salinity core found near Gaduk-Do is the plume patch advected by tidal currents. Rossby deformation radius varied with the tidal cycle so that Coriolis effect is strengthened in flood tides to deepen the isohalines westwards to the Gaduk-Do site. Internal wavelike shape was found in the section of cross-plume direction during ebb tides. Richardson number of the section suggests the possibility of forming internal wave but more precise observations are necessary.

• Korean Journal of Ichthyology
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• v.19 no.4
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• pp.318-323
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• 2007

The feeding habits of Pacific cod (Gadus macrocephalus) were studied based on the examination of stomach contents of 192 specimens collected from November, 2005 to January, 2006 in the coastal waters off Gadeok-do, Korea. The size of Pacific cod ranged from 35 to 82 cm in standard length (SL). Pacific cod mainly consumed shrimps such as Eualus spathulirostris, Crogon hakodatei and C. affinis and fishes. Its diet also included small quantities of cephalopods, amphipods, hermit crabs and crabs. Individuals between 35 cm and 45 cm SL mainly consumed shrimps. The portion of shrimps decreased with increasing fish size, and this decrease was paralleled with increased consumption of fishes and cephalopods. In this study we found Syngnathus schlegeli in the stomach contents of many Pacific cod specimens. S. schlegeli is a typical seagrass fish species which inhabits in seagrass beds, This fact means that Pacific cods stay in the seagrass beds during spawning period. Therefore migration of Pacific cod to coastal waters off Gadeok-do during spawning period seems to be a survival strategy for its larvae and small juveniles to stay in seagrass beds which provide with abundant foods and shelters to many commercial fish species.

• The Journal of the Petrological Society of Korea
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• v.13 no.2
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• pp.47-63
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• 2004

This study focuses on the petrography and petrochemical characteristics of the volcanic and plutonic rocks in Gadeog island, Busan, Korea. Based on textural and mineralogical characteristics, intermediate volcanic rocks can be divided into andesitic lava flows (porphyritic and massive andesites) and andesitic pyroclastics. Felsic volcanic rocks are composed of rhyolite, rhyolitic welded tuff, and tuff breccia. Plutonic rocks are intruded rhyolite and andesitic rocks, and composed of hornblende granodiorite which contains lots of mafic magma enclaves. Volcanic rocks are composed of andesite, dacite and rhyolite having a range in SiO$_2$ from 59 to 78wt.%. The volcanic rocks belong to the calc-alkaline rock series. Plutonic rocks have a range in SiO$_2$ from 63 to 69wt.%. This compositional variations correspond to those of Cretaceous volcanic and plutonic rocks in the southeastern Gyeongsang basin. The trace element composition and rare earth element patterns of the volcanics, which are characterized by high LREE/HFSE ratios and enrichment in LREE, suggest that they are typical of calc-alkaline volcanic rocks produced in the subduction environment around continental arc. We concluded that volcanic and plutonic rocks in Gadeog Island were evolved from orogenic andesitic magma which was produced by partial melting of the mantle wedge in the subduction environment.

• Korean Journal of Ichthyology
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• v.12 no.1
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• pp.54-61
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• 2000

Feeding habits of Zoarces gilli collected in the coastal water off Gadeok-do, Korea from March 1998 to February 1999 were studied. Z. gilli was a carnivore and consumed mainly shrimps, gammarid amphipods, fishes, bivalves and cumaceans. Its diets also included small quantities of copepods, caprellid amphipods, ostracods, crabs, squids, gastropods, ophiuroids and polychaetes. It showed ontogenetic changes in feeding habits. Individuals of small size (10~15 cmSL) fed mainly on small prey organisms such as gammarid amphipods, bivalves, cumaceans and ostracods. However, larger shrimps and fishes were heavily selected with increasing fish size.