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        • Comparative Trial of Rifampicin Alone and Rifampicin Plus Dapsone in the Treatment of Lepromatous Leprosy

          Ryong,,Choi,Shi,Ju,,Rhee,Kyoung,Marion,,Donald,W. CATHOLIC MEDICAL CENTER 1977 Bulletin of the Clinical Research Institute Vol.5 No.1

          Our study did not reveal any significant difference between combination therapy (rifampicin+dapsone) and monotherapy (rifampicin) according to decrease in B.I., M.I., ENL occurance, or improvement in clinical features. Rapid decrease in M.I. was observed in all patients, and all cases had reached baseline M.I. within 15 months of therapy. Although some cases showed an increase in B.I. before the ninth or tenth month of treatment (four patients in the groups receiving combination therapy), all patients had a markedly reduced B.I. after 18 months of treatment, and 7 of the 15 cases had converted from B.I. positive to negative, ENL occured during treatment in four patients, but did not involve a concurrent rise in B.I. or M.I., and after 18 months, no patient was in ENL. Peripheral clinical features were markedly improved after a year of therapy, but nerve thickening showed only mild improvement, or no improvement in some cases. This may be due to the presence of "persister organisms", or could simply be due to the characteristic of nerve tissue to collagenize in the presence of fragmented bacilli. We conclude that rifampicin, whether in combination with dapsone or by itself, is much more effective than sulfone therapy in eradication of M. leprae.

        • KCI등재

          Evaluation of Historic Breeding Habitats with a View to the Potential for Reintroduction of theOriental White Stork (Ciconia boyciana) and Crested Ibis (Nipponia nippon) in Korea

          Shi-Ryong,Park,Su-Kyung,Kim,Ha-Cheol,Sung,Yu-Sung,Choi,Seok-Wan,Cheong 한국동물분류학회 2010 Animal Systematics, Evolution and Diversity Vol.26 No.3

          The Oriental White Stork (Ciconia boyciana) and the Crested Ibis (Nipponia nippon) are wetland species listed as “Endangered” on the IUCN Red List of Threatened Species. The two species were once common on the Korean peninsula, but have experienced a severe population reduction in the past decades. Currently, they are officially extinct in Korea. At present, reintroduction programs to release the birds to the wild are in progress in Korea as well as in Japan. In this study, we surveyed the historic breeding sites of the two species using the literature and face-to-face interviews with local people as a step toward determining appropriate breeding habitats for reintroduction. We found 26 historic breeding sites for the Oriental White Stork in Chungcheong-do and Gyeonggi-do, but did not find any breeding sites for the Crested Ibis. These findings suggest that the Oriental White Stork was resident, while the Crested Ibis was a winter visitor to Korea. Based on these results, we discuss the possibilities for successful reintroduction of the two species in Korea.

        • KCI등재

          Behavioral Function of the Anomalous Song in the Bush Warbler, Cettia diphone

          Shi-Ryong,Park,Seokwan,Cheong,Hoon,Chung 한국통합생물학회 2004 Animal cells and systems Vol.8 No.2

          The bush warblers (Cettia diphone) have been recognized to possess two types of songs: a normal song that plays roles in attracting mate and territorial defense, and an anomalous song. The present study suggests that the anomalous song functions as an alarm signal as well as other unknown signals. Field observations and playback experiments on the anomalous song of bush warbler were conducted in order to investigate the contextual information that occurred between sender and receiver. In the field observation, the males frequently emitted anomalous songs to potential predators. The males responded with an anomalous song to stuffed potential predators. The distance from where the anomalous song occurs to the stimulating source varied depending upon the kinds of stimulus. The males of bush warbler possibly show different responses to the anomalous song depending on the level of danger. When the anomalous song was played back to terrestrial males and females, no distinctive behavior was observed. The anomalous song may be sung to defend the territory against predators or to distract invaders from the nest and female because the male and female behaviors were related with the anomalous song and its phonetic characteristics.

        • KCI등재

          Male Song Repertoire Size and Syllable Sharing of Oriental Great Reed Warblers, Acrocephalus orientalis

          Shi-Ryong,Park,Mi-Jin,Park,성하철 한국통합생물학회 2009 Animal cells and systems Vol.13 No.1

          The size of song repertoires mainly provides evidence for explaining sexual selection for female choice as well as male-male competition. We investigated the role of oriental great reed warbler songs (Acrocephalus orientalis) of breeding territorial males. Early arrived males possessed larger song repertoires, paired earlier, and tended to become polygynous. No correlation was found between arrival date and territory size, but polygynous males significantly occupied larger territories than non polygynous males. Song sharing was low among males and the degree of similarity did not relate with spatial distance. Our results suggest that song repertoire of the oriental great reed warbler males play a role in female choice, where territory quality may affect male pairing success. The size of song repertoires mainly provides evidence for explaining sexual selection for female choice as well as male-male competition. We investigated the role of oriental great reed warbler songs (Acrocephalus orientalis) of breeding territorial males. Early arrived males possessed larger song repertoires, paired earlier, and tended to become polygynous. No correlation was found between arrival date and territory size, but polygynous males significantly occupied larger territories than non polygynous males. Song sharing was low among males and the degree of similarity did not relate with spatial distance. Our results suggest that song repertoire of the oriental great reed warbler males play a role in female choice, where territory quality may affect male pairing success.

        • KCI등재

          Cannibalism in the Korean Salamander (Hynobius leechii : Hynobiidae, Caudata, Amphibia) Larvae

          Shi-Ryong,Park,Ji-Young,Jeong,Daesik,Park 한국통합생물학회 2005 Animal cells and systems Vol.9 No.1

          Cannibalism plays important roles at the levels of both individual and population. To enhance overall rate of successful survival and reproduction, salamander larvae may have evolved to consume both conspecifics and heterospecifics. Consuming conspecifics could result in decreased inclusive fitness possibly by killing relatives. In several salamander species, discrimination of salamander larval siblings from non-siblings and heterospecifics to avoid such a risk has been reported. To determine whether the Korean salamander larvae consume non-siblings more often than siblings and to analyze prey preferences of the salamander larvae in several different experimental conditions, a series of foraging experiments was conducted in the laboratory. We found that 1) large cannibal larvae preyed on small sibling more often than small non-sibling in a mixed group of sibling and non-sibling, 2) cannibal larvae prefered to consume live, weak, and small larvae to dead, healthy, and large larvae, and 3) cannibal larvae consumed heterospecific tadpoles more often than conspecific non-sibling larvae in a mixed group. In addition, the larval density was positively correlated with the occurrence of spacing behavior, one of the agonistic predator behaviors among salamander larvae.

        • Cannibalism in the Korean Salamander (Hynobius leechii: Hynobiidae, Caudata, Amphibia) Larvae

          Park,,Shi-Ryong,Jeong,,Ji-Young,Park,,Dae-Sik The Korean Society for Integrative Biology 2005 Integrative biosciences Vol.9 No.1

          Cannibalism plays important roles at the levels of both individual and population. To enhance overall rate of successful survival and reproduction, salamander larvae may have evolved to consume both conspecifics and heterospecifics. Consuming conspecifics could result in decreased inclusive fitness possibly by killing relatives. In several salamander species, discrimination of salamander larval siblings from non-siblings and heterospecifics to avoid such a risk has been reported. To determine whether the Korean salamander larvae consume non-siblings more often than siblings and to analyze prey preferences of the salamander larvae in several different experimental conditions, a series of foraging experiments was conducted in the laboratory. We found that 1) large cannibal larvae preyed on small sibling more often than small non-sibling in a mixed group of sibling and non-sibling, 2) cannibal larvae prefered to consume live, weak, and small larvae to dead, healthy, and large larvae, and 3) cannibal larvae consumed heterospecific tadpoles more often than conspecific nonsibling larvae in a mixed group. In addition, the larval density was positively correlated with the occurrence of spacing behavior, one of the agonistic predator behaviors among salamander larvae.

        • Evaluation of Historic Breeding Habitats with a View to the Potential for Reintroduction of the Oriental White Stork (Ciconia boyciana) and Crested Ibis (Nipponia nippon) in Korea

          Park,,Shi-Ryong,Kim,,Su-Kyung,Sung,,Ha-Cheol,Choi,,Yu-Sung,Cheong,,Seok-Wan The Korean Society of Systematic Zoology 2010 Korean Journal of Systematic Zoology Special Issue Vol.26 No.3

          The Oriental White Stork (Ciconia boyciana) and the Crested Ibis (Nipponia nippon) are wetland species listed as "Endangered" on the IUCN Red List of Threatened Species. The two species were once common on the Korean peninsula, but have experienced a severe population reduction in the past decades. Currently, they are officially extinct in Korea. At present, reintroduction programs to release the birds to the wild are in progress in Korea as well as in Japan. In this study, we surveyed the historic breeding sites of the two species using the literature and face-to-face interviews with local people as a step toward determining appropriate breeding habitats for reintroduction. We found 26 historic breeding sites for the Oriental White Stork in Chungcheong-do and Gyeonggi-do, but did not find any breeding sites for the Crested Ibis. These findings suggest that the Oriental White Stork was resident, while the Crested Ibis was a winter visitor to Korea. Based on these results, we discuss the possibilities for successful reintroduction of the two species in Korea.

        • How do Young Block-tailed Gulls (Larus crassirostris) Recognize Adult Voice Signals\ulcorner

          Park,,Shi-Ryong,Chung,,Hoon The Korean Society for Integrative Biology 2002 Korean journal of biological sciences Vol.6 No.3

          This study was conducted to find out how young black-tailed gulls (Larus crassirostris) recognize adult voice signals after hatching. For the experiment, adult voice recorded in the natural environment was played back at controlled intervals and intensity (dB) to 15 young gulls that were artificially hatched in the laboratory. The chirirah call frequency of young gulls increased as the intensity of the mew call increased. The chirirah response of the control group was highest to the mew call at intervals of 1.8s. The adult long ca11 and alarm call also showed similar results to the mew call when the interval and intensity were manipulated similar to the mew call. Based on the results of this experiment, it is assumed that the young black-tailed gulls recognize adult voice signals based on the simple structure of adult voice signals, that is, the interval and intensity of the voice.

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