• 한국환경복원기술학회지
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• 제26권6호
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• pp.189-203
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• 2023

This study analyzed potential breeding sites for black-faced spoonbills on 70 non-breeding, uninhabited islands in Incheon, Korea, in order to suggest potential breeding sites for black-faced spoonbills, whose breeding population has recently been increasing. By comparing the environmental characteristics of breeding and non-breeding areas identified through a literature search, we developed a discriminant to identify potential breeding areas for black-faced spoonbills. Among a total of eight environmental variables(Island area, distance from land, distance to mudflat, distance to rice field, distance to sea route, depth of water, mudflat area, rice field area), the variables that influenced the selection of breeding sites for black-faced spoonbills were average water depth, tidal flat area, and paddy field area. As a result of discriminant analysis of breeding islands using these variables, the accuracy was found to be quite high at 80%. As a result of applying the developed discriminant to non-breeding islands located in the Incheon region, a total of 9 islands(Yongrando, Goseokdo, Beolyeom, Joreumseom, Goeriseom, Hambakdo, Moido, Bigajido, Ahyeom) were identified as potential breeding grounds for spoonbills. The research results can be used as basic data for future management of black-faced spoonbill breeding sites and selection of alternative habitats.

• 한국작물학회지
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• 제51권6호
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• pp.554-564
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• 2006

It is important to understand pedigree of rice cultivars commonly used for breeding. In this paper, pedigree tables for tracking the pedigree of 17 representative rice cultivars recommended by Rural development Adminstration (RDA) were completed and analyzed using two kinds of web database system; 'IRIS' and 'RRDB'. Seven cultivars, namely, 'Sangmibyeo', 'Ilpumbyeo', 'Saegewhabyeo', 'Surabyeo', 'Shindongjinbyeo', 'Ilmibyeo' and 'Jungwhabyeo' had 'Koshihikari' on the pedigree of their ancestor. Besides 'Koshihikari', the most feguently used ancestral germplasms among the high quality rice cultivars were 'Fujisaka 5', 'Kameno o' and 'Asahi', 'Fujisaka 5' was used as ancestral parent in 12 out of 17 cultivars. Interestingly, 'Kameno o' was used in pedigree of 16 out of 17 high quality varieties and 'Asahi' was used in the ancestral pedigree of all 17 varieties. 'Hwayeongbyeo' was used as one of parent in the breeding of 'Dongjin 1', 'Hwabongbyeo', 'Saegewhabyeo' and 'Junambyeo'. 'Ilpumbyeo' was used in the breeding pathway of 'Junambyeo' and 'Saegewhabyeo', 'Mangeumbyeo' itself was not enlisted as one of high quality rice cultivars, but was used as a breeding parent of three high quality varieties, namely, 'Saegewhabyeo', 'Hwabongbyeo' and 'Nampyeongbyeo'. Incorporated with evaluation data, pedigree will provide a valuable chance to genealogical tracking of agronomic traits such as disease resistance, grain quality and etc.

• 한국작물학회지
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• 제53권3호
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• pp.326-332
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• 2008

영남평야지 조기재배시 국내 육성된 고품질 조생종 품종들의 품질에 미치는 영향을 살펴본 결과를 요약하면 아래와 같다. 1. 공시품종들의 평균 출수기는 7월 22일로 8월 하순에서 9월 상순사이에 수확이 가능한 것으로 판단되었고, 공시품종들의 평균 수당립수, 등숙율 및 수량에서 품종간 유의한 차이가 있었으며, 운광벼가 수량이 529 kg/10a로 가장 많았다. 2. 수확시기별 현미 품위를 조사한 결과 동할미 발생을 줄이고 현미 정립율을 높이기 위해서는 출수 후 40일경에 수확하는 것이 정립은 8월25일$\sim$ 9월1일 사이 수확하는 것이 가장 높았으며, 수확시기가 늦어질수록 미숙립의 발생은 감소하고 동할립의 발생은 증가하였다. 백미 완전미는 중화벼와 고운벼가 72.2%와 71.0%로 높았으나 싸라기 발생이 높았으며, 운광벼와 오대벼는 분상질의 발생이 많았다. 3. 운광벼와 오대벼는 백미 단백질 함량은 6.4%로 낮았으며, 식미관능검정의 총평이 각0.6 및 0.5로 밥맛이 양호하였다.

• Journal of Forest and Environmental Science
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• 제34권1호
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• pp.57-60
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• 2018

Great cormorant (Phalacrocorax carbo) have been growing on a large scale since they settled on Jokja Island in Lake Paldang in 2010. In 2017, 827 breeding nests were found in Jokja Island and the breeding success rate was $2.60{\pm}0.23$ per nest. Nestling tree did not show any specificity for the species and was severely damaged. As the nesting materials for cormorants, branches and leaves, which were easy to come by around the island, were used. Most of their prey were fish in Lake Paldang. The population the great cormorants showed high breeding success rate, indicating that Jokja Island was a good site for breeding. Thus, it shows that continuous research for them needs to be done.

• Journal of Ecology and Environment
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• 제38권4호
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• pp.415-424
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• 2015

This research was conducted to reveal the characteristics of breeding ecology of oriental scops owl (Otus sunia stictonotus) inhabiting in South Korea according to the nest types during the breeding season from march to October for two years (2011 and 2012). Oriental scops owl nested in woodpecker's nest holes (46.1%), natural tree holes (38.5%), and artificial wood boxes (15.4%). These nests were located on following trees: Zelkova serrata, Paulownia coreana, Celtis sinensis, Salix chaenomeloides, Salix babylonica, Fraxinus rhynchophylla, Robinia pseudoacacia and Platanus occidentalis. The hatching success was 91.4%, fledging success was 83.0%, and breeding success was 75.9%. The factors of the breeding failure were falling (57.1%), abandonment (28.6%), hatching failure (7.1%), and others with unknown cause of death (7.1%). According to nest types, the fledging success (69.2%) of woodpecker's nest holes were low and the hatching success (79.2%) of natural tree holes were also low due to hatching failure and abandonment. However, hatching success, fledging success, breeding success were high in the artificial nests as all the eggs hatched and succeeded in fledging. Therefore, we suggested that artificial nests can cover the weaknesses of natural nests as well as increasing the breeding success. However, long-term research on installation place, height, and hole sizes of the artificial nest are required in order to clearly reveal the effects on the breeding success of oriental scops owl.

• Ocean and Polar Research
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• 제31권3호
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• pp.277-282
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• 2009

Saunders' gulls (Laurs saundersi) which are listed as globally vulnerable species on the IUCN Red List are distributed in East Asia and breed mainly in China and Korea. Their population is estimated to be between 7,100 to 9,600. Songdo reclaimed lands in the western coast of South Korea are the main breeding sites for these species. However, most of these breeding sites have been seriously disturbed in the last several years because of new urban development constructions. This study was conducted to provide baseline data on the breeding ecology of Saunders' gulls. Since 1998, the breeding population has rapidly increased in South Korea, with the number of nests rising from 85 nests in 2000 to 185 nests in 2005. Egg volume is more variable than breadth or length. Clutch size, hatching and breeding success were $2.9{\pm}0.81$ (n=182, mean$\pm$sd.), 48.07% (75 hatched egg/156 eggs) and 29.08% (155 fledglings/533 eggs), respectively. Factors affecting breeding failure were predation, rainfall, starvation and supernormal clutches. These results are provided along with other cited literature to argue for conservation of Saunders' gulls.

• 한국작물학회지
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• 제53권4호
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• pp.421-426
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• 2008

Freshly harvested seed of Chinese milk vetch (Astragalus sinicus L.; CMV) was strongly dormant because of hardseedness. Seeds of freshly harvested germinated only 8% while clipping the seed coat completely overcome the innate dormancy, which indicates inhibition of germination of the seed is mainly due to seed coat (87%). The dormant (intact) hard seeds did not imbibe water whereas the non-dormant (clipped) seeds took up rapidly. In natural environment condition, the hard seed coat dormancy was broken only after 5 months after seed harvest. To break such a strong seed coat dormancy, the chemical and heat treatments were effective. Concentrated sulfuric acid was more effective than dry heat and hot water treatments. Hot water treatment improved germination but the germination percentage was less than 41%. Treatments increased germination due to its effect on the seed coat integrity. A scanning electron microscope reveled that disruption of seed coat layers and subsequent development of numerous crack in the hilum region of the seed and on the seed coat surface of concentrated sulfuric acid treatment and formation of cracks in the dry heat treatments, respectively, were observed in the seed coat surface, which served as water entry points.

• 한국산림과학회지
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• 제100권3호
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• pp.397-401
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• 2011

본 연구는 활엽수림 지역에 설치한 인공새집에서 번식을 실시한 박새류의 번식 생태를 파악하기 위하여 2006년부터 2010년까지의 매년 3월부터 7월까지의 기간 동안 실시되었다. 5년에 걸친 조사기간 동안 활엽수림에 설치한 인공새집에서는 곤줄박이, 쇠박새, 박새 등의 박새류가 번식을 하였다. 박새류가 번식을 실시한 인공새집은 입구직경별로 번식쌍수가 큰 차이가 없는 것으로 나타났다. 종별로는 박새가 가장 많이 이용한 것으로 나타났으며, 곤줄박이가 가장 적게 이용하였다. 인공새집을 이용한 박새류는 몸의 크기에 따라 선호하는 입구직경이 달랐는데, 몸의 크기가 큰 박새는 입구직경이 35~40 mm인 인공새집을 주로 이용하였다. 반면 몸의 크기가 가장 작은 쇠박새는 입구직경이 30 mm인 인공새집에서 주로 번식을 하였다. 첫 산란일, 한배 산란수, 한배 새끼수, 포란기간, 육추기간, 번식성공률은 종별, 연도별로 차이를 보였다. 앞으로 박새류의 번식생태에 영향을 주는 요인에 대한 연구를 통해 환경요인과 번식생태에 관한 규명이 필요할 것으로 판단된다.

• 한국작물학회지
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• 제51권spc1호
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• pp.73-76
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• 2006

화영벼와 일품벼를 이용하여 벼멸구에 피해에 따른 농업적 특성, 수량 및 품질에 미치는 영향을 검토한 결과는 다음과 같다. 1. 벼멸구 피해지에서 간장 수장 및 수당립수는 차이가 없었으나, 등숙율 및 쌀수량은 무피해구에 비해 감소되어 출수기 이후의 피해가 큰 것으로 나타났다. 2. 현미의 외관품질 분석 결과 벼멸구 피해지의 정상립 비율은 감소하였고, 미숙립, 피해립 및 사미의 발생은 증가되었다. 3. 벼멸구 피해지의 쌀의 이화학적 특성 분석 결과 아밀로스 함량은 차이가 없었으나, 단백질 함량은 높았다. 최고 점도는 낮고 치반점도는 높았으며 취반시 호화특성이 불량한 것으로 나타났으며, 식미치는 낮아졌다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제2권4호
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• pp.247-258
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• 2021

To understand restoration and conservation projects conducted in Korea for endangered freshwater fishes and amphibians/reptiles, information about Request for Protocols-related studies on restoration, breeding, and release were collected. Trends of studies were visualized via word clouds and VOSviewer program using a text mining technique. Analysis of restoration projects for endangered freshwater fishes elucidated that most research studies conducted to date were focused on genetics and release through captive breeding that could be classified into captive breeding and habitat environments. As for research projects related to amphibians/reptiles, monitoring projects had the highest number, followed by genetic, translocation, and monitoring studies. In addition, restoration projects for amphibians/reptiles included a large number of post-capture translocation projects. Thus, many projects were confirmed by public institutions rather than by the Ministry of Environment. Network analysis revealed that it was largely classified into capture, translocation, and Kaloula borealis. Based on these results, limitations, achievements, and challenges associated with projects conducted thus far are highlighted. Research directions for future restoration and conservation of endangered freshwater fishes and amphibians/reptiles in South Korea are also suggested.