• 한국환경복원기술학회지
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• 제19권2호
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• pp.95-107
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• 2016

The gold-spotted pond frog(Pelophylax chosenicus) classified as an Anura in Amphibia is sharply decreasing due to various changes of habitats environment, and designated as IUCN Red List Threatened species(VU; Vulnerable) internationally and domestic endangered species Class-II; therefore, it's in urgent need of the research on habitats restoration of the gold-spotted pond frog in order to prevent its extinction. This study was carried out to verify the effect after restoration by introducing the inhabitation elements deducted by the literature research and a field survey on the habitats for the gold-spotted pond frog in danger of regional extinction in the urban area of Ansan city, Gyeonggi-do, Korea. Accordingly, the capacity for bio-species was increased by expanding the area of habitats into $11,845m^2$, and securing the place for hibernation and corridors and discharge within the habitats, etc. As a result of the monitoring the number of individuals increased by 9.5 times as the reproductive success rate of the gold-spotted pond frog got higher, and by virtue of improvement in the habitats, biodiversity increased to 183 species(4 species of amphibians and reptiles, 4 species of mammals, 17 species of birds, 53 species of insects(terrestrial/Benthic), 4 species of fish, and 102 species of plants). It might be possible to verify the restoration effect of the habitats through continuous monitoring, and suggest the restoration model on the habitats for continuously survivable the gold-spotted pond frog in the urban area by deducting the matters to be improved.

• 생명과학회지
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• 제28권8호
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• pp.985-991
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• 2018

생물시계(Biological clock)는 생명체에서 나타나는 반복되는 자율적인 리듬을 말하며, 단일세포는 물론 다세포 생명체의 기본적인 대사와 이에 따른 표현형과 행동을 직접적으로 조절하고 있다. 이러한 생물시계는 동면 리듬, 수면 리듬, 심장박동 리듬 및 짝짓기 노래 리듬 등 매우 다양하며, 24시간 이상의 주기를 infradian rhythm, 24시간 주기를 circadian rhythm, 24시간 이내의 짧은 주기를 ultradian rhythm으로 구분한다. 효모 Saccharomyces cerevisiae는 최소 5종 이상의 반복되는 자율적인 리듬이 알려져 있으며, 이중 일부는 생체시계로 인식되고 있다. 본 리뷰에서는 Saccharomyces cerevisiae의 glycolytic oscillation (T= 1~30분), cell cycle-dependent oscillation (T= 2~16 시간), ultradian metabolic oscillation (T= 15~50분), yeast colony oscillation (T= 수 시간) 및 circadian oscillation (T= 24시간)에 대한 연구 결과를 제시하고, 특히 ultradian metabolic oscillation의 특징, 집단 동조인자(population synchronizer), 동조인자의 조절 기작 및 효모 생물시계의 대사공학 분야의 이용성을 제시하여 효모를 이용한 동적 대사조절 및 생물시계 연구가 가능함을 제시하였다.

• 한국환경복원기술학회지
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• 제14권1호
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• pp.35-42
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• 2011

The current study analyzed appropriateness of abandoned rice paddy wetlands as habitats for the Amphibia by assessing functions and value of abandoned rice paddy wetlands within land development districts as a habitat for living creatures and researching into the Amphibia living in the subject districts. For this purpose, the study designated abandoned rice paddy wetlands within Hwaseong A District and Pangyo B District under land development as subject lands. Those wetlands went through succession after abandonment of farming. Detailed study results are as follows. From classification of wetland types and an analysis of their characteristics, it was found that herbaceous plants such as smartweed communities, horsetail communities and reed communities, and woody plants such as pussy willow communities appeared in both districts. These abandoned rice paddy wetlands shows typical characteristics of palustrine wetlands. As a result of a vegetation structure research, it was observed that succession has been progressed for at least over 2~3 years. In assessment of wetland functions by item, it was found that they are developing into fine wetlands in terms of functions because they are ranked over Moderate Class except separate distance from streams. Also from a research into animals living in the abandoned rice paddy wetlands, it was found that main inhabitants are Rana nigromaculata,Rana dybowskii, Hyla japonica, Bufo bufo gargarizans, etc. It can be confirmed that the abandoned rice paddy wetlands are providing appropriate conditions as habitats to the Amphibia in a view that those species have life cycles of inhabitation (shores and wetlands) - egg-laying (rice paddy, puddles and swampy places) - hibernation (rice field banks and swampy places). From this point of view, it was found that abandoned rice paddy wetlands that developed because of abandonment of farming can be used as means to improve structure and functions of habitats.

• 한국환경복원기술학회지
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• 제16권2호
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• pp.115-125
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• 2013

In this research, a habitat model for Chinemys reevesii is suggested based on the components and variables of the Habitat Suitability Index which was determined through a series of literature researches, site surveys, and behavioral analysis. After reviewing the general habitat requirements, the site surveys(9 reservoirs) from July to December 2010, and the behavioral analysis of five Chinemys reevesii, the relationship between the behavioral and habitat use pattern was evaluated. According to the site surveys and behavioral analysis, the ecological core area(FK 50%) was about 0.96ha on average, the influence area(FK 90%) 4.22ha, and the home range was about $37.75{\pm}17.26m$ on average. As for the habitat use pattern of Chinemys reevesii, it travels through canals, and is influenced by the surrounding land uses. Also when there is a lack of food, the home range increases, and during hibernation, Chinemys reevesii prefers to be in an area within 1~2m range of water shores of fine textured soil and aquatic plants. After analyzing the information, the HSI standard was set and its components were determined as food, sunbathing and cover, aquatic environment, and spatial relationships. And the variables and the ranges of the components was determined as aquatic plant cover(0~49.81%), sandy area($3{\sim}13m^2$) and water velocity(0~60cm/s) etc. Lastly, plans and sections of the habitat model is provided designed according to the information from the researches, and problems to consider during habitat restoration was suggested in order to help understand about Chinemys reevesii habitat.

• 한국수산과학회지
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• 제50권3호
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• pp.270-277
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• 2017

This study was carried out to investigate seasonal changes in body composition in Boleophthalmus pectinirostris in Korea. B. pectinirostris collected in Gangjin, Jeonnam, consisted of 58.7-75.8% moisture content, 16.1-17.6% protein, 0.8-3.4% crude lipids, and 1.3-3.6% crude ash. Livers consisted of 15-17% moisture content, 14.0-16.8% crude protein, 34.4-71.2% crude lipids, and 0.5-1.2% crude ash. Calcium, iron, potassium, etc., content in B. pectinirostris muscle averaged 267.5-599.8 mg/100 g, 1.98-28.3 mg, 160.7-327.9 mg, 20.6-60.2 mg, 0.4-2.2 mg, 0.23-0.46 mg, 66.5-192.9 mg, and 1.32-3.8 mg, respectively. (Please clarify: the list of measured values must correspond directly with what was measured, not just "etc.") The major amino acids in B. pectinirostris muscle, in proportional order, were glutamic acid, isoleucine, and leucine; whereas the major amino acids in the liver were glutamic acid, lysine, aspartic acid, and leucine. The major saturated fatty acids in the muscle were palmitic acid (15-19%) and stearic acid (8-11%). The major monoenes and polyenes were palmitoleic acid (C16:1) and oleic acid (C18:1), and EPA and DHA, respectively. The major saturated fatty acids and polyenes in the liver were the same as in muscle, but the monoenes were palmitoleic acid (C16:1) and cis-10-hepta-decenoic acid (C17:1). Seasonal changes in B. pectinirostris body composition may be attributable to differential accumulation of fat and nutrients in comparison to the spawning and hibernation period.

• 정보보호학회논문지
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• 제23권3호
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• pp.459-470
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• 2013

${\mu}TESLA$는 WSN(Wireless Sensor Network)에서 대표적인 에너지 효율적 브로드캐스트 인증 방법이다. 지금까지 ${\mu}TESLA$의 문제점을 파악하고 이를 해결한 많은 연구들이 존재하지만, 그들 대부분은 자신들의 성능 입증을 위해 현실과는 거리가 먼 실험 환경에서 검증되었다. 우리는 현실에서 실제 WSN을 사용할 법한 실험 환경을 가정하고 이 바탕 위에서 ${\mu}TESLA$가 가진 실체적인 성능에 대해서 고찰해볼 필요가 있다고 생각하였다. 이 논문에서는 BS가 네트워크에 상주하지 않는 UWSN(Unattended WSN) 환경에서 동면과 활동을 반복하는 센서 노드들이 멀티홉으로 통신을 수행하는 경우를 가정하였다. 이러한 환경에서 우리는 다양한 모의실험을 통하여 ${\mu}TESLA$의 성능을 새로이 검증 및 분석하였다.

• 한국응용곤충학회지
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• 제16권2호
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• pp.105-113
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• 1977

한국산 불개미의 다형현상에 있어서 일개미의 몸의 크기와 임무수행과의 관계, 유시웅의의 시맥상의 변이, 성비 및 소의 크기에 따르는 일개미번데기의 형별발생과 일개미집단의 형별구성등에 관하여 조사한 결과를 요약하면 다음과 같다. 1. 일개미는 3형으로 분화되어 있으며, 소형은 주로 소의 내부에 동료집단의 보호와 외부에서 진딧물에 방문하는 임무를, 그리고 대형과 중간형은 주로 외부에서 식이운반, 조소 및 동료집단의 보호임무를 수행한다. 그러나 소형이 진딧물에 방문하는 임무는 반드시 고정되어 있는 것이 아니고 계절에 따라 다소 변동이 있는 것 같다.

• Parasites, Hosts and Diseases
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• 제43권3호
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• pp.75-92
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• 2005

Extensive previous studies on taxonomy, behavior/bionomics and control of Anopheles sinensis are reviewed and summarized. Recent molecular identification revealed that the population of An. sinensis complex includes An. sinensis, An. pullus, An. lesteri and at least two new species, and An. yatsushiroensis is synonmy of An. pullus. An. sinensis is the main vector specie of vivax malaria in Korea. Larvae of An. sinensis breed in wide range of habitats which are naturally-made clean water, stagnant or flowing; main habitats include rice fields, ditches, streams, irrigation cannals, marshes, ponds, ground pools, etc. Their host preferences are highly zoophilic. Human blood rate is very low ($0.7-1.7\%$); nevertheless An. sinensis readily feeds on man when domestic animals are not found near by. They feed on hosts throughout the night from dusk to dawn with a peak period of 02:00-04:00 hours; they are slightly more exophagic (biting outdoors); much larger numbers come into the room when light is on. Main resting places are outdoors such as grasses, vegetable fields and rice fields. A mark-release-recapture study resulted that $37.1\%$ was recaptured within 1 km, $29.4\%$ at 1-3 km, $21.1\%$ at 3-6 km, $10.3\%$ at 6-9 km and $2.1\%$ at 9-12 km distance. An. sinensis hibernate outdoors (mostly under part of dense grasses) during October-March. At the end of the hibernation period (March-April) they feed on cows at daytime. Until today any single measure to effectively control An. sinensis population has not been found. Indoor residual spray with a long-lasting insecticide can not reduce vector population densities, but shorten their life spans in some degree, so contributes to malaria control.

• 한국어류학회지
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• 제20권2호
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• pp.90-96
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• 2008

미꾸리 M. anguillicaudatus의 등, 후두부, 체측 부위에서 적출한 피부조직의 형태를 분석하여 계절의 변화에 따른 각 부위 조직의 형태변화를 관찰하였다. 각 피부조직은 점액세포를 포함한 상피세포들로 구성된 표피층과 결합조직의 진피층으로 구성되어 있었으며, 표피와 진피층의 경계에 모세혈관이 분포하고 있었다. 표피의 middle layer에 분포하는 점액세포는 수온이 낮아짐에 따라 그 형태가 원형에서 타원형 또는 장타원형으로 변화하였고, 단위면적당 세포의 개수와 크기 및 분비량이 증가하였는데, 특히 후두부에서 그 변화양상이 가장 크게 나타났다. 또한, 등과 체측 부위의 비늘이 존재하는 진피층에서는 eosin에 염색되는 염기성 물질이 상당량 분비되어 진피층의 두께가 두꺼워지는 경향을 보였다. 계절변화에 따른 이러한 피부조직의 구조적 변화를 미꾸리의 동면, 피부호흡 및 점액의 기능과 관련하여 고찰하였다.

• 한국연초학회지
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• 제22권1호
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• pp.51-57
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• 2000

The feeding preference of cigarette beetles, Lasioderma serricorne F., was tested using various leaf litters. The number of the trapped L. serricome was 45.25$\pm$10.44 at flue-cured leaf tobacco, Nicotiana tabacum L., 23.50$\pm$6.0 at chinese juniper, Juniperus chinensis L., 1l.75$\pm$4.99 at oak, Qqercus acutissiuma C., and 1l.50$\pm$2.52 at rice-straw, (Oryza. sativa L.). The response of oviposition was 93.20$\pm$26.22 at flue-cured leaf tobacco, 53.60$\pm$11.82 at chinese juniper, 48.20$\pm$20.90 at oriental arborvitae, Thuja orientalis L., 31.80$\pm$18.10 at cherry-tree, Prunus serrulata var. spontanea M., and 29.40$\pm$13.7 at rice-straw. However, the oviposition was respectively low at gingko, Ginkgo biloba L.,(5.40$\pm$2.97), turf grass, Zoysia japonica S., (5.20$\pm$13.7), and oak (3.00$\pm$l.41). The augmentation was maximum at chinese juniper (27.33$\pm$19.44 of emerged adults) followed by Magnolia obovata (8.50$\pm$9.33). Fifty percent of the tested species leaf litters including cherry-tree did not show any augmentation. The adult activities after hibernation were primarily found in May and June at Kwangju and Suwon, and in April at Chungju. The field activity of L. serricome at Suwon was mostly lower than that at other places, except in August at Chungju. The first appearance of L. serricome was observed earlier at Chungju and Kwangju than at Suwon, and the frequency of insect appearance was high in July, August, and September. L. serricome could hibernate by feeding on many kinds of plant leaf litters and it's population could be maintained in the open field in Korea.