• Title, Summary, Keyword: Lutra lutra

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Evaluation of Alternative Habitats Using Habitat Suitability Index Model of Lutra lutra in Banbyeoncheon Stream (반변천 일대 수달 서식지 적합성 지수(HSI) 모델을 활용한 대체서식지 평가)

  • Shim, Yun-Jin;Kim, Sun-Ryoung;Yoon, Kwang-Bae;Jung, Jin-Woo;Park, Seon-Uk;Park, Yong-Su
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.23 no.1
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    • pp.63-76
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    • 2020
  • This study was conducted to quantitatively evaluate and analyze the alternative habitats using the HSI(Habitat Suitability Index) model of Lutra lutra in Banbyeoncheon Stream. Six variables were selected as habitat variables for Lutra lutra, including distance from waterfront, land cover within 1km from waterfront, presence of alluvial island, area of inland water and wetland, distance from roads and urbanized arid areas, and distance from aquaculture farm. The SI(Suitability Index) model and HSI model were developed based on the existing literature of Lutra lutra, the results of field surveys and expert opinions, and applied to the alternative habitats to examine the applicability of the HSI model. The results of this study can provide information on habitat evaluation to prevent the extinction of endangered Lutra lutra. In particular, it is highly applicable to the selection and evaluation of alternative habitats for Lutra lutra.

Molecular DNA Systematic Analyses of East Asian Mammals: Sequence Variation of Cytochrome b Gene and Control Region of Mitochondrial DNA of Common Otter, Lutra lutra lutra L. (Mammalia, Carnivora) from Korea

  • Koh, Hung-Sun;Yoo, Mi-Hyeon;Lee, Bae-Geun;Park, Jeong-Gyu
    • Animal cells and systems
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    • v.8 no.3
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    • pp.231-233
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    • 2004
  • Sequences of cytochrome b gene and control region of mitochondrial DNA from Korean common otters (Lutra lutra lutra L.) were examined to provide the genetic information for the conservation of this subspecies. Two haplotypes and one haplotype were revealed in cytochrome b gene and control region, respectively. The available sequences of European common otter (L. l. lutra) from GenBank were compared together with those of Korean common otter in order to determine the degree of sequence variation between them. In cytochrome b gene sequences, two haplotypes from Korea and two haplotypes of Europe showed differences in 12 of 1,045 sites. The Tamura-Nei nucleotide distances between two European haplotypes was 0.10% and those between two Korean haplotypes was also 0.10%, but those between Korean haplotypes and European ones ranged from 0.96% to 1.16%. In the control region, one Korean haplotype and seven European ones showed differences in seven of 300 sites; the Tamura-Nei distances among seven European haplotypes were 0.34% to 1.01%, but those between Korean haplotype and European ones ranged from 1.01% to 1.69%. Although further molecular and morphological studies with specimens from eastern Asia including Amur region and northeast China are needed, it is possible that the Korean common otter might be closer or identical to the far-eastern Asian common otter, L. l. amurensis Dybowski.

Heavy and Trace Metal Analysis of River Otter (Lutra lutra) Spraints from the Geoje Island (우리나라 거제지역에 서식하는 수달의 식이물 중금속 및 미량원소 분석에 대한 연구)

  • Cho Heesun;Lee Sang-Don
    • Korean Journal of Environmental Biology
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    • v.23 no.3
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    • pp.315-321
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    • 2005
  • The population of river otter (Lutra lutra) has been declined most of the world due to hunting, habitat destruction and indirect or direct influences of eutrophication, acidification and toxic chemicals. This study is conducted to identify the population decline of river otter in Korea with relation to environmental pollution caused by accumulation of heavy and flared metals. The field survey was conducted during Jan~Dec, 2004 at a monthly basis by collecting spraints. A total of 228 spraints were collected and analysis was done by ICP-AES. The concentrations of fourteen metals (Cr, Zn, Cd, Pb, Ni, Fe, Co, Mn, Mg, Cu, Al, Ba Hg, As) have been determined. Annual concentrations of Cd $(1.38{\mu}g\;g^{-1}),\;Zn\;(599.06\;{\mu}g\;g^{-1}),\;Pb\;(5.54\;{\mu}g\;g^{-1})$ at Gucheon were higher than those of Yeonchocheon. Concentrations of $Cr\;(5.01{\mu}g\;g^{-1}),\;Ni\;(1.91{\mu}g\;g^{-1}),\;Co\;(0.25{\mu}g\;g^{-1})$ were higher at Yeonchocheon. Most metals in winter were significantly increased (P<0.05) as season progressed from spring to winter. $Pb\;(15.58{\mu}g\;g^{-1}),\;Cu\;(15.15{\mu}g\;g^{-1}),\;a;Guchoen\;and\;Cr\;(5.77{\mu}g\;g^{-1})$ at Yeonchocheon were high in the downstream of winter.

Ectopic migration of Dirofilaria immitis in a Eurasian otter (Lutra lutra) in Korea

  • Jung, Ji-Youl;Lee, Kyunghyun;Seo, Hyun-Ji;Cho, Yun Sang;Kim, Young-Dae;Kim, Ji-Hyeon;So, ByungJae;Choi, Eun-Jin
    • Korean Journal of Veterinary Research
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    • v.58 no.2
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    • pp.107-109
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    • 2018
  • An 8-year-old female Eurasian otter (Lutra lutra) reared in a wetland center, died 2 h after sudden onset of astasia and dyspnea despite medical treatment. Gross examination of internal organs revealed 10 adult filarioid nematodes in the right ventricle of the heart and three between the left and right cerebral hemispheres. All nematodes were identified as Dirofilaria immitis by direct microscopy and polymerase chain reaction assay. Histopathological observation revealed multifocal hemorrhage in the cerebral subarachnoid space and focal necrosis with hemorrhage in the cerebellar parenchyma. Although rare, veterinarians should consider cerebral dirofilariasis as a differential diagnosis in unexplained neurological cases.

Distribution of Eurasian Otter Lutra lutra in Korea (한국 수달(Lutra lutra)의 분포 현황)

  • Jo Yeong-Seok;Won Chang-Man;Kim Joo-Pill
    • Korean Journal of Environmental Biology
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    • v.24 no.1
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    • pp.89-94
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    • 2006
  • This study was conducted to infer habitat distribution of Eurasian otter Lutra lutra in Korea. We recognized trace or presence of otter spraints from 254 of 750 pixels (pixel size: 13.75X11 km) used in this survey, amounting to 34%. The highest frequency of localities, with the spraints present, occurred in Gyeongsangbuk-do (49.62%) and the lowest one was observed in Gyeonggi-do (7.36%). The other regions were as follows: Gangwong-do (49.56%), Chungcheong buk-do (41.67%), Gyeongsangnam-do (38.00%), Jeolabuk-do (37.93%), Jeolanam-do (24.24%), Chungchengnam-do (20.29%). The counted number of the spraints was very low level in most of the localities where they were found (1.7spraints per sprainting site). It may indicate that small size of local populations would be expected in most of the localities. The habitat distribution of Korean otter, inferred from the distribution pattern of the spraints, will provide valuable basic information required for conserving and managing Korean otter.

Surgical Implantation of Intra-abdominal Radiotransmitter and Observation of Postoperative Behaviour in the River Otter (Lutra lutra) of Korea (수달의 복강 내 무선추적 전파발신기의 이식과 수술 후 행동 관찰)

  • Kim, Young-Ki;Min, Hee-Kyu;Jin, Yeung-Bae;Lee, Sung-Kyu;Oh, Ki-Cheol;Kim, Jong-Kab;Lee, Scott-S.;Lee, Hee-Chun;Chang, Hong-Hee;Lee, Hyo-Jong;Yeon, Seong-Chan
    • Journal of Veterinary Clinics
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    • v.26 no.4
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    • pp.395-399
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    • 2009
  • Radiotelemetry device was surgically implanted in the abdomen of a Eurasian river otter (Lutra lutra). Behaviors of the otter, hospitalized after surgical implantation were also observed. The surgical techniques involved an incision in the paralumbar fossa to introduce a radiotelemetry device into the abdominal cavity. Thirteen behaviors of the otter during hospitalization following abdominal surgery were observed and the time budget of each behavior and the times at which each behavior seems to appear most frequently were measured. This report could provide surgical techniques involving intra-abdominal implantation in otter and basic information associated with otter's behaviors during hospitalization.

Analysis about Habitat of Eurasian Otter Lutra lutra L. by Using GIS in the River Ungok of North-Kyongsang Province (GIS를 이용한 경북 봉화군 운곡천 수달(Lutra lutra Linnaeus, 1758)의 서식지 분석)

  • 정종철;조영석
    • Spatial Information Research
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    • v.12 no.1
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    • pp.29-42
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    • 2004
  • This Study was Analysis about Habitat of Eurasian otter Lutra lutra L. In October 2002 during September 2003, Otter Spraints and Sprainting site were searched in river Unkog of North-Kyongsang Province for taking the GPS coordinates. For Analysis of habitat, This data were used by Arcview ver. 3.2 with 1/25000 Topology Map and Other Field data. The result of Habitat Analysis meant that Habitat use was strongly related to Fish diversity and richness also vegetation and cover were connected with otter habitat. In other hand, The Human interferences including dense structures like House acted as factor of disturbance. This study suggest that The preceding about Suitable habitat having free of Human disturbance, abundant fish and good vegetation is essential In Trial for Conservation or Recovery of Otter like Trans-location.

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