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Gonepteryx속(인시목: 흰나비과) 교미낭의 미세구조에 관한 비교분석
정선우,이창언,김훈수,Cheong, Seon-Woo,Lee, Chang-Eon,Kim, Hoon-Soo The Korean Society of Systematic Zoology 1992 Korean Journal of Systematic Zoology Special Issue Vol.3 No.-
흰나비과중 Gonepteryx속의 6아종에 대한 교미낭을 해부 및 주사전자현미경으로 관찰하여 종간의 형태를 비교분석 하였다. 흰나비과의 다른 속에서처럼 이속의 교미낭도 ductus bursa, corpus bursa 그리고 appendix bursa의 세 부분으로 뚜렷이 구분되었으며, corpus bursa의 형태는 종에 따라 그 차이가 비교적 뚜렷하였으나 signum은 모두 ribbon모양으로 속내에서 매우 안정된 형태를 보였다. Signum주위 내벽에는 동심원상으로 많은 주름이 발달해 있었으며 그곳에는 내벽돌기가 없었고 맞은편에 광범하게 분포하였다. 내벽돌기는 대부분 방추형이었으며 교미낭의 형태와 내벽돌기의 상태로 고려했을때 G. aspasia와 G.taiwana가 속내에서 가장 유사한 종들로 인식되었다. Bursae copulatrix of six species of Gonepteryx were morphologically compared using a steroscopic microscope and a scaning electron microscope. As other genera of Pieridae, appendix bursae were developed in this genus and the shapes of the bursae copulatrix were different to species. However, shapes of signa were stable and were not distinct to species. On innersurfaces around ribbon-like signa, many folds were developed and most of inner-surface processes were widely distributed on the oppostie side of signa. Most of innersurface processes were spindle-like and basal ridges were developed. G. aspasia and G. taiwana were recognized as the most similar species in Gonepteryx considering shapes of bursae copulatrix and the condition of innersurface processes.
도롱뇽 ( Hynobius leechi ) 의 시각계 발생
정선우(Seon Woo Cheong),윤춘식(Chun Sik Yoon),김덕훈(Douk Hoon Kim) 한국안광학회 1998 한국안광학회지 Vol.3 No.1
Visual system of Korean Salamander(Hynobius leechi) was morphologically studied. Fertilized eggs in egg sacs were collected and were developed in sterile saline solution. Various sized larvae of 5-30mm in length were fixed. Specimens were paraffin sectioned and were observed under light microscope. In 5mm length larva, lens rudiment induced by optic cup was combined with sensory ectoderm. The shape of lens was changed as spherical in 12mm length larva, but the retinal layer did not differentiated into three layers. The differentiation of retinal layer was clear in 14-16mm length larva. The central region of lens fibers was degenerated. Iris and ciliary body were formed from the marginal zone of optic cup in 20mm length larva. Choroid was thicker in elder eye of 30mm length larva and cartilage developed at outer region of optic cup. The outer segment of photoreceptor cell layer grew longitudinally. Optic newe was corulected to the ventral part of brain through cartilage
홍성진,윤춘식,정선우,Hong, Sung-Jin,Yoon, Chun-Sik,Cheong, Seon-Woo 한국환경과학회 2019 한국환경과학회지 Vol.28 No.12
In this study, we investigated the spatial range, distribution pattern, temporal appearance, sex ratio, seasonal pattern, and size of the population of Leptalina unicolor locally inhabiting the wetland protection area in the Jaeyaksan Mountain. We found that the butterfly was distributed across four areas at 750 m above sea level and in an area of 96,000 ㎡. in the southeastern slope of the mountain. The discontinuous distribution of the butterflies in the meadow. According to our survey conducted from 2012 to 2014, L. unicolor occurred in May (spring) and July (summer) each year, with the male population more than three times higher than that of the female population. The population size estimated using the mark and recapture method on the back of the hind wing in the two years was as follows: 877±502 and 1243±800 individuals in the spring and summer of 2012, respectively, and 783±429 and 506±365 individuals in the spring and summer of 2014, respectively, suggesting no specific seasonal pattern. The findings of this study are expected to be useful for the conservation of the populations and habitats of L. unicolor, which are currently distributed locally due to a decrease in population size.
Xenopus 초기배의 이낭과 동물극분리배양에서 유도된 이낭간의 형태비교
윤춘식,김홍득,정선우,Yoon, Chun-Sik,Kim, Hong-Duck,Cheong, Seon-Woo 한국현미경학회 1997 Applied microscopy Vol.27 No.2
The ultrastrucures of Xenopus otic vesicle from normal embryo (st. 43) and induced otic vesicle from animal cap assay with Activin A were compared. Activin A was applied to the presumptive ectoderm at various concentrations for three days at $20^{\circ}C$. The results were almost identical to the reference studies, but it was found that the otic vesicle was induced at the concentration of 10 ng/ml in to)v rate. This otic vesicle may be secondarily induced by the neural tissue showed commonly at the concentration of 10 ng/ml. Otoliths were observed as three or four-axis crystaline bodies in the lumen of otic vesicle. In electron micrograph of the normal embryo, two kinds of microvilli were observed on the apical position of hair cells. One was small and common, the other was large-sized and sparsely distributed. In both cell of otic vesicle, mitochondria, golgi apparatus and multivesicular body were rich, so, they showed a lot of similarities in ultrastructure. However, the otolith was not found and microvilli were overexpressed in the otic vesicle induced by Activin A.
은줄팔랑나비(나비목: 팔랑나비과) 성충의 행동특성과 서식지 보전방안
홍성진,김형곤,윤춘식,정선우,Hong, Sung-Jin,Kim, Hyoung-Gon,Yoon, Chun-Sik,Cheong, Seon-Woo 한국환경과학회 2020 한국환경과학회지 Vol.29 No.8
To conserve the population of a hesperiid butterfly, Leptalina unicolor, inhabiting the protected areas of Jaeyaksan, we provide ecological information on their behavior and propose habitat conservation measures, such as the creation of alternative habitats based on comprehensive information. The behavioral study used a method of re-capture after releasing the butterfly with enamel marks on the wings. Adult behaviors were shown in four patterns: flying, settling on a plant, nectar absorption, and water absorption. Both males and females had the highest proportion of flight movement overall; however, males had a slightly higher proportion of flight movement. As for duration, females spent more time settling on plants to select spawning sites, and males seemed to take a longer time for water absorption activities, to absorb minerals needed to form the spermatophore. The average travel distance of butterflies was 27.5 m for females and 46.7 m for males, with daily activity ranges from 11.2 m to 43.8 m, and 21.4 to 57.6 m, respectively. The most important condition to preserve the habitat of Leptalina unicolor is to maintain the community of Miscanthus sinensis, a food plant. Additionally, because this butterfly has a high rate of water absorption activities, wetlands should be maintained.
섬진강 하구역 습지에서 쇄방사늑조개 대량발생 원인파악을 위한 수질환경 연구
김형곤 ( Hyoung-gon Kim ),정정조 ( Cheong-jo Cheong ),정선우 ( Seon-woo Cheong ),김형수 ( Hyeong-su Kim ),이영식 ( Young-sik Lee ) 한국환경기술학회 2018 한국환경기술학회지 Vol.19 No.4
본 연구에서는 최근 섬진강 하구역 습지에서 쇄방사늑조개의 대량발생 원인 파악을 위하여 개체의 특성 및 수질환경을 알아보았다. 채집된 개체의 각장은 11.82 ~ 20.93 mm, 각고는 7.75 ~ 13.15 mm, 각폭은 4.60 ~ 8.70 mm의 범위였다. 수질환경요인 중 수온, pH, DO는 2016년과 2017년의 월별 패턴의 변화양상이 유사하나 쇄방사늑조개가 대량 발생한 2017년에는 염분농도가 높았다. 염분농도의 변화는 강수량과 서로 유의한 상관성을 보였는데 이는 강수량이 염분농도의 변화에 영향을 주기 때문이다. 이를 통해 염분농도의 변화가 쇄방사늑조개의 대량발생에 있어서 주요 요인으로 작용했을 것으로 판단된다. In this study, water environment and individuals characteristics of Seomjin river estuary wetland were examined to find out the cause of bloom of Potamocorbula amurensis in the area. Collected individuals show 11.82 ~ 20.93 mm shell length, 7.75 ~ 13.15 mm shell height, and 4.60 ~ 8.70 mm shell width. Among the water environmental factors, water temperature, pH, and DO have similar change aspects in 2016 to 2017. However, salinity of Seomjin river estuary was higher in 2017 than it was in 2016. This phenomenon could be explained by the fact that precipitation affects on salinity of water. Therefore, it is determined that the changes of salinity is the main factor of bloom of Potamocorbula amurensis,
한국산 은줄팔랑나비(Leptalina unicolor : Hesperiidae)의 생활환과 사육정보
홍성진 ( Sung-jin Hong ),윤춘식 ( Chun-sik Yoon ),김형곤 ( Hyoung-gon Kim ),정선우 ( Seon-woo Cheong ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.12
Leptalina unicolor is a hesperiid butterfly with a restricted distribution in Korea, Japan, China, and Russia. Recently, the number of individuals is rapidly decreased in their natural habitat. This skipper has been classified as an endangered species in the `Red Data Book`, and according to an IUCN report, is under threat of extinction. Therefore, the conservation and restoration of this species both locally and globally are urgently needed. A population of L. unicolor was found in an unknown habitat in Jaeyaksan, Miryang, Gyeongsangnam-do, Korea in 2011, and these individuals were used in the present study. Here, the life cycle, characteristics of each instar larva and breeding information were determined by breeding L. unicolor in the laboratory from 2012 to 2015. The results indicated that L. unicolor occurs twice a year and over-winter as a fifth instar larva. A spring-form female individual laid 17.25±5.52 eggs, and summer form laid 29.00±5.86 eggs; it takes 53.79±0.73 days for L. unicolor to develop from eggs to adults. After spawning, the eggs developed in 6.16±0.18 days, and larvae developed in 33.71±0.58 days; the pre-pupal stage to emergence required 14.22±0.31 days. Based on these results, we presented effective breeding information for the restoration and proliferation of the species. Several candidate plants species have been reported in the literature as a food source for L. unicolor, but we found that the preferred diet this butterfly was Miscanthus sinensis. The larvae could move easily when their preferred diet was planted in ≥ 80% the cage floor area Year-round breeding was achieved by placing overwintering individuals in low temperatures in autumn. To our knowledge, this is the first study to the biology of L. unicolor in Korea, and the results of this study could be used as preliminary information for the conservation and restoration of this species in its natural habitat.