• 한국환경생태학회지
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• 제29권3호
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• pp.353-367
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• 2015

본 연구에서는 을숙도 큰고니 서식지의 생태계 건강성 유지방안을 마련하기 위하여 시스템 사고를 통해 큰고니 서식환경 변화 현상에 대한 피드백 구조를 분석하였다. 을숙도 내 큰고니와 기타 수조류의 개체수에 대한 인과지도를 통해 을숙도 큰고니 개체수는 휴식환경 및 먹이환경 변화와 관계가 있음을 확인하였다. 큰고니의 휴식환경 인과지도에서는 탐조 및 탐방활동, 수위, 소음에 의한 휴식환경 변화가 큰고니 개체수에 영향을 미치는 것을 확인하였으며, 큰고니의 먹이환경 인과지도를 통해 담수의 면적, 수면동결, 을숙도 염분, 새섬매자기 밀도에 의한 먹이환경 변화가 큰고니 개체수에 영향을 미치는 것으로 확인 하였다. 마지막으로 통합인과지도를 통해 낙동강하굿둑 방류량과 건설행위가 큰고니의 휴식환경과 먹이환경에 영향을 미치는 변수임을 파악하였으며 큰고니 서식환경 관리를 위한 전략지점으로 선정하여 관리방안을 제시하였다. 연구의 결과는 장기적 관점에서 을숙도의 생태계 건강성을 유지를 위한 관리방안마련에 기여할 것이다.

• 한국임상수의학회지
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• 제34권6호
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• pp.474-477
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• 2017

We described the successful treatment of cases of lead poisoning in a Whooper swan (Cygnus cygnus) and a Cinereous vulture (Aegypius monachus) in Korea. The swan and vulture rescued were diagnosed with lead poisoning based on clinical signs, the presence of suspected lead-like particles in the ventriculus detected by radiography and elevated blood lead levels. Endoscopic retrieval for the swan and gastric lavage for the vulture were used to remove the lead respectively. After the removal of lead particles, a course of chelation treatment was administrated. This would be the first report of successfully treating wild birds with lead poisoning in Korea.

• 한국임상수의학회지
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• 제23권4권
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• pp.472-475
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• 2006

Aspegillosis in free-living birds can be occurred mostly under poor weather and climate. But, captive birds tend to be more susceptible to infection and diagnosis was made usually at post mortem. A two months old Whooper swan(Cygnus c. cygmus) dying suddenly was found in a zoo without prior clinical signs. At necropsy, numerous well- demarcated yellow to white firm nodules were scattered throughout the air sacs and the lungs. Microscopically, granuloma formations were observed in the lung and air sacs. The margin of granuloma was surrounded by connective tissue barrier and was infiltrated with lymphocytes, and also observed giant cell near the granuloma. By Periodic acid Schiff reaction, hyphae were detected in granuloma of lung and air sacs. This case was diagnosed as an invasive pulmonary aspergillosis caused by Aspergillus fumigatus infection in a Whooper swan at a zoo.

• 한국임상수의학회지
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• 제41권2호
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• pp.139-142
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• 2024

A wild Whooper swan (Cygnus Cygnus) with limping due to an injured left pelvic limb in an accident was rescued on the seashore and transferred to the Jeju Wildlife Rescue Center on November 23rd, 2020. On physical examination, its body condition score was 1 out of 5 due to starvation and dehydration. The left coxofemoral joint was also examined by careful palpating and estimating the damage. Moderated soft tissue swelling and crepitus surrounding the hip joint were confirmed. Radiography and computed tomography (CT) were used together for an accurate diagnosis of the joint. By radiographs readings, it was difficult to accurately confirm the condition of the proximal femur due to superimposition of the synsacrum and internal organs. However, signs such as avulsion fracture of the femoral head and a few fragments around the joint were revealed by CT imaging. Besides, through three-dimensional (3D) image analysis of CT, the dislocated area and condition of the left hip joint could be accurately and easily confirmed. The diagnostic process showing in this paper could be used as a good reference for diagnosing coxofemoral joint luxation in wild swan.

• 생태와환경
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• 제51권4호
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• pp.365-372
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• 2018

The Wintering Waterbird Census of Korea was started in 1999 and monitors 200 major migratory sites in South Korea. Waterfowl counts have been undertaken for more than 20 years since; however, a limited number of studies have analyzed the temporal patterns of waterfowl population. In this study, we analyzed population size changes of wintering whooper swan (Cygnus cygnus) at 112 monitoring sites from 2001 to 2018. The average number of whooper swans was $4,296{\pm}42.66$ and there was a trend for an increase in population size across the survey period. We found that the population in the Nakdong River Estuary, one of the major wintering sites over 18 years (26.22% of the national population), had rapidly decreased (-0.77% per year). Conversely, the whooper swan population in the Junam Reservoir and Sihwa Lake increased (+1.64%, +0.54% per year, respectively). Estuaries showed the highest dominance of whooper swans among the five different habitat types, accounting for 32.13% of the population. Reservoir/lakes had 30.60% of the total population and reclaimed lakes(18.24%), river (13.11%), and coast (5.93%) followed. The annual distribution of the whooper swan population in South Korea has been affected by various habitat conditions resulting from human activities and urbanization. To better understand the complex factors that can cause rapid changes in wintering waterfowl populations, it is necessary to integrate the data from the bird census program with environmental conditions to conduct in-depth pattern analyses over longer time periods.

• 대한수의학회지
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• 제57권4호
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• pp.257-260
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• 2017

Two Whooper swan (Cygnus cygnus) died after suffering from pododermatitis, lethargy, and ataxia; necropsy was performed. Grossly, the liver was swollen and firm. The kidney and spleen were also enlarged and a pale tan color. On histopathologic examination with Congo red staining, amyloidosis was noted in liver, spleen, and kidney. In addition, marked osseous metaplasia was present in the liver. Based on these results, systemic amyloidosis involving liver, spleen, and kidney with osseous metaplasia in the liver was diagnosed. Study results indicate that an inflammatory reaction associated with pododermatitis had a role in the amyloidosis in this particular case.

• 헤리티지:역사와 과학
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• 제43권1호
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• pp.86-99
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• 2010

2007년 3월부터 2008년 2월까지 낙동강하구에서 관찰된 천연기념물 조류는 검은머리물떼새(Haematopus ostralegus; 제326호), 원앙(Aix galericulata; 제327호), 고니(Cygnus columbianus; 제201-1호), 큰고니(Cygnus cygnus; 제201-2호), 저어새(Platalea minor; 제205-1호), 노랑부리저어새(Platalea leucorodia; 제205-2호), 참수리(Haliaeetus pelagicus; 제243-3호), 흰꼬리수리(Haliaeetus albicilla; 제243-4호), 잿빛개구리매(Circus cyaneus; 제323-6호), 황조롱이(Falco tinnunculus; 제323-8호), 개리(Anser cygnoides; 제325-1호) 등 총 11종 2,209개체였다. 특히, 국내 철새도래지 중 2,000개체 이상의 큰고니(Cygnus cygnus)가 월동하는 곳은 낙동강하구가 유일하다. 을숙도와 명지 갯벌 및 사구주변의 간석지(명금머리, 백합등, 도요등, 장자도 등)는 노랑부리저어새, 큰고니, 개리 등 천연기념물 조류의 주요 서식지이며, 세모고랭이(Scirpus triqueter), 갈대(Phragmites communis) 등의 수생식물군락은 큰고니를 비롯한 오리류의 채식 및 휴식처로서 중요한 역할을 하고 있다. 낙동강하구의 서식지 및 천연기념물 조류의 보호와 관리 방안으로 수질오염의 최소화, 수생식물의 서식지 조성 및 관리, 사구 및 갯벌의 보호, 안정적인 서식지 확보, 지속적인 모니터링이 필요하다고 생각된다.

• 한국환경과학회지
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• 제32권8호
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• pp.533-542
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• 2023

Understanding the regional distribution of swans in the lower Nakdong River area is also important for the continuous habitat of swans according to changes in the surrounding environment of the area. This study was conducted to understand the regional distribution aspect of swans (Cygnus spp.) downstream of the Nakdong River, Republic of Korea, from October 2013 to September 2018. In the estuary, a small ship was used to move along a certain route and observe it with the naked eye or binoculars, and in the land area, Line transect census and Point census method were conducted in parallel. During this period, two species and 34,647 individuals of swans were observed, including 34,356 Whooper Swans (Cygnus cygnus) and 291 Tundra Swans (Cygnus columbianus). The average number of individuals observed in 15 different areas was 1172, 103, 214, 1825, 1850, 13, 318, 1, 0, 1, 11, 21, 5, 0, and 239 respectively. The total average of the number of individuals in these areas was 384.76. The numbers differed significantly among the survey areas (Kruskal-Wallis test, X2=4349.01, P < 0.001). Particularly, the numbers were larger in Eulsukdo, Lower Eulsukdo, and Daemadeung than in the other regions. In conclusion, as long-term survey data, it can be used as basic data to analyze the distribution of swans due to environmental changes caused by the development of the Nakdong River, predict changes in the habitat status of migratory birds, and prepare measures necessary for preservation.

• 한국환경생태학회지
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• 제19권3호
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• pp.305-311
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• 2005

본 조사는 2000년 10월부터 2001년 3월까지 월별 1회씩 총 6회의 조사를 전라남도 강진만과 주변 지역에 대하여 조사하였다. 조사기간동안 관찰된 수조류는 총 36종이며 최대개체수의 합계는 9,825개체였다. 최우점종은 청둥오리 Anas platyrhynchos $(48.4\%)$였으며, 다음은 쇠오리 Anas crecca$(10.8\%)$,혹부리오리 Tadorna tadorna$(9.7\%)$, 흰뺨검 둥오리 Anas poecilorhyncha $(9.5\%)$, 큰고니 ◎?gnus cypfus$(4.8\%)$의 순이었다. 매월 출현한 종(출현율 $100\%)$은 쇠백로(Egretta garzetta), 청둥오리, 흰뺨검둥오리의 3종이 었으며, 천연기념물 제201호인 큰고니는 11월에 가장 많은 232개체가 관찰되었고,12월에 가장 적은 125개체가 관찰되었다. 주요 우점종인 오리류는 월동초기 에는 많은 수가 도래 하여 북상시기 에는 점차 감소하는 일반적 인 양상을 보였다. 종다양도는 3월이 2.01로 가장 높았으며 10월이 1.24로 가장 낮았다. 강진만 지역은 큰고니를 비롯한 수조류에게 안정적 인 먹 이원과 휴식지를 공급해주는 지 역 이다. 특히 전라남도에서 천연기념물 제101호인 진도의 백조도래지보다 많은 수의 큰고니 가 도래하여 월동하는 지역으로 중요성을 가지고 있다. 따라서 강진만 지 역 에 대하여 보호지 역 지정과 더불어 지속적 인 관리가 필요하다.

• Journal of Multimedia Information System
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• 제5권2호
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• pp.91-98
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• 2018

We devised a bird-borne transceiver unit for S-band packet radio communications based on the CC2500 transceiver, a device manufactured by Texas Instruments (TI). Our assessments determined the optimal parameters needed to achieve successful bird-to-center communication over a distance of 18 km and bird-to-bird communication over a distance of 200 m. These parameters included optimal modulation methods, transmission rates, and antennas. We equipped the transceiver unit with a modified dipole antenna (collinear antenna), which we tested in a 10 m anechoic chamber. Our experimental assessments and circuit design review identified the following parameters: 2FSK modulation method; 14.28 kHz frequency shift; 101.56 kHz IF reception bandwidth; and Manchester encoding (+). Our assessments showed bird-to-bird communications could be achieved over a distance of 200 m assuming MSK, FEC (+), and 500 kbps. Following tests by an official body, we obtained 28 sets of a type approval license for 2.4 GHz. In cooperation with the Yamashina Institute for Ornithology, we attempted to tag and release six or more swans. This unit gives us the ability to obtain vital data on swans. We expect this data to provide significant benefits, including clues on improving screening for infected individuals.