Kyo-Soung Koo

Kyo-Soung Koo
Ewha Womans University · Interdisciplinary Program of EcoCreative

Ph.D

About

78
Publications
18,686
Reads
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209
Citations
Additional affiliations
March 2015 - February 2019
Kangwon National University
Position
  • PhD Student
February 2012 - August 2014
Jeju National University
Position
  • Master's Student
March 2003 - February 2009
Kyonggi University
Position
  • PhD Student

Publications

Publications (78)
Article
Full-text available
On 26 June 2019, a large number of Suweon treefrogs, Dryophytes suweonensis, was found in a rice paddy located in Gimpo-si, South Korea. A total of 31 adults of D. suweonensis were found, breeding in a single rice paddy. No other Suweon treefrog was found within a radius of approximately 1 km from the rice paddy. The number of Suweon treefrogs reco...
Article
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Turtle leeches have not been recorded in Korea, although they occur in geographically adjacent countries including China and Japan. This study describes a turtle leech, Ozobranchus jantseanus (Clitellata: Ozobranchidae), found from Reeve’s turtle (Mauremys reevesii) in Korea. Of the 143 Reeve’s turtles collected from the freshwater reservoir in Jin...
Preprint
Understanding the geographic distribution of species is crucial for establishing protected areas. This study aimed to identify the preferred habitat environment of South Korean herpetofauna using distribution point information, providing the information necessary to protect their habitat by establishing a species distribution model. We found that c...
Article
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Latitudinal variations in species niche due to factors such as phenotypic plasticity and local adaptation pose fundamental problems for ecological niche modelling at large geographic scales. Species adaptation to varying climates across latitudes thus necessitates the latitudinal adjustment of climatic variables for incorporation into more accurate...
Article
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The American Bullfrog (Lithobates catesbeianus) has been imported into South Korea in earnest for food since the 1970s and introduced into nature due to release and escape. Accordingly, the influx and spread of American Bullfrogs are expected to have a direct impact on native species, but few related studies have been conducted on this. We predicte...
Article
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It is important to understand the dynamics of population size to accurately assess threats and implement conservation activities when required. However, inaccurate estimates are harming both the threat estimation process, and the resulting conservation actions. Here, we address the extinction threats to Scincella huanrenensis, a species described i...
Data
Supplementary material accompanying the article "How Threatened is Scincella huanrenensis? An Update on Threats and Trends"
Article
Full-text available
The endangered species Mongolian racerunner (Eremias Argus), with a limited distribution in South Korea, is found only in sand dunes near waterside and forests. Therefore, species trends in this particular habitat are directly affected by habitat contamination and destruction. In this study, we examined the effects of coastal sand dune restoration...
Article
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The wildlife that inhabits natural wetlands has been threatened in recent years because of human activities, such as land use changes. Rice fields, however, have been receiving attention as possible substitutes for natural wetlands. Amphibians are one of the representative taxa that inhabit rice fields and are critical for their food webs and ecosy...
Article
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Alligator snapping turtles (Macrochelys temminckii Troost, 1835), Chelydridae, is native to the United States and is popular as a pet in many countries despite its large size and inclusions in CITES (Appendix III). On October 15, 2019, an alligator snapping turtle was found at the bottom of a stream in Gwangju, Republic of Korea. The turtle measure...
Article
As the world becomes more globalized, the non-native species issue has emerged as a problem that is growing internationally. In particular, the number of non-native turtles found in the wild has been increasing sharply in South Korea. At least 15 species of non-native turtles, including the red-eared slider (Trachemys scripta elegans) first importe...
Article
Full-text available
Abstract. Amphibian diseases and invasive amphibian species are both generally introduced through the wildlife trade, either for human consumption or for the pet trade. However, adequate regulations can prevent such introductions. In the Republic of Korea, the establishment of invasive Lithobates catesbeianus populations resulted in the alteration...
Article
American Bullfrog (Lithobates catesbeianus) is the most famous non-native amphibian in the world, including South Korea. This species cause problems such as disturbing ecosystems, mediating diseases, predation and competition against native species. Moreover, the economic and social costs for solving the problems are enormous. Bullfrogs were import...
Article
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Rice fields are major habitats of wildlife and they can substitute natural wetlands. Therefore, various ecological studies have been conducted for the conservation and management of rice fields worldwide. Amphibians are one of the representative taxonomic groups using rice fields as their breeding sites and their populations are rapidly decreasing...
Article
Full-text available
In this study, we investigated the survival and adaptation possibility of three non-native turtles, Trachemys scripta elegans, Pseudemys concinna and Mauremys sinensis, in Korea environment especially winter season. The status and body weight of individuals were periodically recorded in an artificially constructed pond located in the National Park...
Article
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We analyzed the effectiveness of sound monitoring using call recording of the amphibians in the Baenanggimi wetland in Heuksan-myeon, Sinan-gun, Jeollanam-do. As a result, it was confirmed with two species, P. nigromaculatus and H. japonica by song meter. The first call of the black-spotted pond frog was detected on 20 March, and the breeding seaso...
Article
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Globally, an increase in the transportation and expansion of the pet market is the most important cause of the invasion of non-native species. Invasion of non-native species disturbs native ecosystems and leads to socio-economic problems. The pet trade involving turtles has been globally recognized as the route through which non-native species ente...
Article
Full-text available
Recent advances in transportation and expansion of the pet trade have increased the influx of non-native species into the Republic of Korea. Many of these non-native species have been introduced into the wild through release by humans. The introduction of non-native species can cause ecosystem disturbances, as well as a variety of social and econom...
Article
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The development of transportation and the expansion of the pet market has become the main causes of the increase in the cross-border migration of non-native species. Moreover, recent sales over the Internet were a factor that has promoted pet trades. While the import of non-native species has been steadily increasing in the Republic of Korea, it is...
Article
On May 27, 2019, a non-native turtle was discovered at Ilsan Lake Park, Janghang-dong, Ilsandong-gu, Goyang-si, Republic of Korea. The turtle was identified as a western painted turtle (Emydidae: Chrysemys picta bellii) based on the external morphology, plastron color, plastron pattern, stripes on the side of the head, and shape of the carapace. In...
Article
Full-text available
The complete mitochondrial (mt) genome of Hynobius unisacculus was sequenced and characterized. The circular mt genome constituted of 37 genes (13 protein-coding genes, 22 transfer RNAs, and 2 ribosomal RNAs) and a non-coding region (NCR). Phylogenetic analysis based on the full mt genome sequences confirmed that H. unisacculus was closely related...
Article
Full-text available
The complete mitochondrial (mt) genome of Lithobates catesbeianus was sequenced and characterized. The circular mt genome was constituted of of 37 genes (13 protein-coding genes, 22 transfer RNAs, and 2 ribosomal RNAs) and a non-coding region (NCR). Phylogenetic analysis based on the full mt genome sequences confirmed that among the genus Lithobate...
Article
The movement distance and home range size of Pelophylax chosenicus were identified in the rice paddy and ecological park as alternative habitats from July to November 2017. A total of 39 frogs were tracked by radio tracking method. As a result, the average move distance in the population of rice paddy was 11.7 ± 1.9 m (n = 64) and the population of...
Article
Red-eared slider, Trachemys scripta elegans, is one of the most famous species to disturb native ecosystems in the world. In South Korea, the species was imported as pet, and now it is found whole of the country. Recent, natural breeding and spreading of the turtle has been reported. In this paper, we investigated the environmental factors to affec...
Article
Full-text available
American bullfrog Rana catesbeiana Shaw, 1802 (= Lithobates catesbeianus) is one of the world's most problematic amphibians. In both 1957 and 1973, the species was introduced to the Republic of Korea, in order to be bred as a food resource. However, after breeding efforts failed, the breeders illegally released the frogs into the wild. Now, about 5...
Article
In this study, we investigated the habitat characteristics of a reservoir in Gyeongju City, Gyeongbuk, in which a large group of Mauremys reevesii (endangered species Class II and natural monument No. 453 in Korea) was discovered. We examined the biotic and abiotic factors that directly and indirectly threaten the survival of M. reevesii within the...
Article
The red-eared slider (Trachemys scripta elegans) is the one of the most popular pets, and the most commonly traded species in the world. It is designated as an ecosystem disturbance species that has been managed in South Korea. To date, no reports of natural or anthropogenic migration and spreading of T. s. elegans in South Korea are available. In...
Article
The objective of this study was to report the group mating of Asian Keelback snake, Hebius vibakari, in South Korea. On May 20, 2009, the group mating of H. vibakari was observed in the Maeng-gol do, Jindo-gun, Jeollanam-do, in the rocky area (107 m above sea level) on the ridge of the island. Six female and five male snakes made a form of mating b...
Article
The relationship between the body size of species and the environment has been an active research subject for many years. Until recently, studies had focused on the relationship between the body size and environment based on the ecogeographic rule for various animal groups. In this study, we examined the relationship between body size of Hyla japon...
Article
Full-text available
Knowing the distribution range and habitat characteristics of a species is an essential part of establishing an effective conservation strategy for that species. In this study, we analyzed the habitat characteristics of the endangered Sibynophis chinensis, found only in Jeju Island in South Korea, and predicted its present and future suitable habit...
Article
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Development of transportations and construction of roads have expanded human activity, while increased the roadkill of wild animals as a result of habitat fragmentation. Roadkill has been identified as a major cause of the decline of local populations of various animal species. In this study, we analyzed the characteristics of amphibian roadkill at...
Article
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It is important to recognize and evaluate the ecological niche and geographical habitat of species for understanding the biogeographic distribution pattern of them. The objectives of this study were to identify the spatial distribution and ecological niches of three brown frog species (Rana dybowskii, R. coreana, and R. huanrensis) using geographic...
Article
Mauremys reevesii is a Korean endemic turtle, and designed as an endangered species and national monument in South Korea. Recently, the population of the species has been dramatically declining because of habitat destruction, pollution and illegal capture. Moreover, small population size, difficulty of securing individuals, and lack of research are...
Article
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To know if deforestation practice affects the distribution and abundance of herpetofauna in Mt. Gariwang, South Korea, we conducted field surveys over 12 times both at deforested (n=9 sites) and untouched (control, n=12 sites) forest areas from March to October, 2017. Each survey site was approximately 100 m long×20 m wide area, which in the middle...
Article
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We report the first observation of reproductive behavior of endangered snake, Sibynophis chinensis in South Korea. On September 24, 2014, one female and three males were observed during the group mating in Oedo-dong, Jeju. Our observation indicates that group mating and the breeding behavior of S. chinensis could be an important way to increase gen...
Article
To know if small changes in rearing water temperature and density affect the number of bacterial and fungal colonies in metamorphosed frogs, Dybowski's frog tadpoles were reared from Gosner 25-26 stages at either low (1°C low to ambient water temperature), ambient, or high (1°C high) water temperature (each 15 tadpoles in 20 L water) condition and...
Article
Full-text available
Development of transportation is rapidly reducing the barriers between countries, but this is causing the easier migration of species than the past. Typically, exotic species are imported for the purpose of food, leather, and pets. However, it has been introduced into the wild through artificially or naturally paths, and recently they are become a...
Article
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Since a new (unrecorded) species was reported in 2016, a total of four sea snake species are currently listed in Korean waters. Although the possibility of year-round inhabitation of sea snakes in Korean waters has increased due to climate change, the related studies are scarce because of the lack of human resources and available equipment. We plac...
Article
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There are many ongoing studies of infectious diseases as the major factor responsible for global declining of the amphibian population. Although some point out the amphibian rearing facilities like frog farms as one of the important sources of harboring and spreading amphibian infectious pathogens in the wild, there have been few related studies in...
Article
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Globally, ranavirus is often responsible for the mass mortality of a variety of captive and wild amphibians. In Asia, several mass mortality cases of captive amphibians by ranavirus are known, but one mass mortality case in the wild has been reported in a non-endemic larval bullfrog population in Japan. In order to verify factors involved in mass m...
Article
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Marine reptiles are declining globally, and recent climate change may be a contributing factor. The study of sea snakes collected beyond their typical distribution range provides valuable insight on how climate change affects marine reptile populations. Recently, we collected 12 Laticauda semifasciata (11 females, 1 male) from the waters around sou...
Article
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Body scales directly exposed to external environments can be an important factor to understand various characteristics of a species such as habitat features, life history and basic ecology. In this study, we compared size and morphology of dorsal, outermost dorsal, keeled dorsal and ventral scales of total nine snake species in Korea; Oocatochus ru...
Article
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We report the first recorded capture of a blue-banded sea snake (Laticauda laticaudata Linnaeus, 1758, Jobeuntti KunBadabam in Korean) in South Korea based on one male specimen collected from Marado-ri, Seogwiposi, Jeju-do on 20 October 2016. The morphological features of the lateral nostrils, the much wider ventrals than adjacent dorsals, the hori...
Article
Using preserved specimens, we studied the basic life history of the topotypic population of the unique Asian plethodontid salamander, Karsenia koreana. Of 51 individuals examined, 11 males and 13 females were judged as mature from the development of gonads. The ovarian eggs were large (diameter 3.7-4.8 mm) and yellow to orange in color, and the clu...
Article
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In July and June, 2016, we found dead adult Kaloula borealis in Daejeon and sick Hyla japonica tadpoles in Hapcheon, Gyeongnam, respectively. Edema and subcutaneous hemorrhage, typical symptoms of ranavirus infection, were observed on the specimens. To determine potential ranavirus infection, the polymerase chain reaction (PCR) using a specific pri...
Article
Full-text available
The captive breeding program of the Reeve's turtle (Mauremys reevesii), which is designated as an endangered category II species by the Korean Ministry of Environment, has developed, but the reproductive physiology of the species is still not fully understood. In this study, we investigated seasonal changes in the sex steroid levels, the number and...
Article
Full-text available
Various infectious and parasitic diseases are known to be the main factors that cause decline in the global amphibian population. In Korea, commercial frog farms have been running since 2005. However, until now, studies on diseases including studies on parasitic diseases that occur in farm frogs have not been conducted. In this study, we studied an...
Article
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The Chinese sea snake Laticauda semifasciata (Reinwardt in Schlegel, 1837) is newly reported from Korean waters based on three specimens collected from Jeju Island, Korea, in August, September, and November 2015. This is the first time that the genus Laticauda and subfamily Laticaudinae has been reported from Korean waters. The subfamily Laticaudin...
Article
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Here, we report the complete mitochondrial genomes of the skink species Scincella vandenburghi and S. huanrenensis. The mitogenomes were determined to be 17103 bp for S. vandenburghi and 17212 bp for S. huanrenensis. The mitogenomes consist of 13 protein-coding genes, two rRNA genes, 22 tRNA genes and two non-coding regions. We then used the mitoge...
Article
Full-text available
While rearing a female Laticauda semifasciata, an unrecorded sea snake species in Korea and collected at Jeju waters on Aug 27, 2015, in an aquarium in the laboratory between Aug 28 and Nov 12, 2015, we have studied activity patterns of the sea snake. In addition, we have classified the fish preys that the snake regurgitated during its collection a...
Article
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The importance of ecosystem monitoring is increasing to evaluate environmental health conditions and to effectively preserve declining wildlifes. We surveyed amphibians and reptiles in the Jangjeon Valley of Mt. Gariwang which is the representative forest in the mid-part of Korean peninsula between March and November in 2015 and also conducted a li...
Article
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Body size is one of the important factors that determine mating success in various animal taxa. Nevertheless, only few related studies have been conducted on Korean salamanders. In this study, we have investigated whether large male Gori salamander (Hynobius yangi), which is a Korean endemic species and is unknown for its mating behaviors, is domin...
Article
Full-text available
Characteristics of snake reproductive organs that are relatively less affected by external environmental conditions can be used as an important means of classification; additionally, such characteristics can provide useful information on a species’ reproductive system. In this study, we compared the testis weights, hemipenis lengths and retractor m...
Article
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On January 13th, 2015, the breeding behavior was observed between male and female of Mauremys reevesii. The breeding behavior was preceeded to three stages; 1) pre-mating stage: courtship and climbing female’s rear-carapace by male, 2) mating stage: inserting genitals and sperm draining by male, and moving by female, 3) breeding behavior end. Appro...
Article
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In order to reveal the effect of altitudinal change on Rana dybowskii, we examined the developmental stage of embryos using site-shifting eggs. The developing eggs were collected from two different localities of 269m and 1,114m from the sea level and shifted into three different altitudes (27, 308 and 1,098m). The preliminary results have shown tha...
Article
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In this study, we report for the first time a hybridization between Caretta caretta and Chelonia mydas in South Korea. On 7th May 2012, a sea turtle (Jeju sea turtle 01, JST01) was found in the east coast of Jeju Island, South Korea. The morphological characteristics of JST01 were compared with those of C. caretta and C. mydas that were frequently...