서해안 굴, Crassostrea gigas의 건강도 평가를 위한 Condition index와 혈구 apoptosis 분석

임현정,임매순,이원영,최은희,윤주현,박승윤,이승민,김수경,Lim, Hyun Jeong,Lim, Mae Soon,Lee, Won Young,Choi, Eun Hee,Yoon, Ju Hyun,Park, Seung Yoon,Lee, Seung Min,Kim, Su Kyoung 한국패류학회 2014 The Korean Journal of Malacology Vol.30 No.3

A significant production decrease has been witnessed for the Pacific oysters, Crassostrea gigas farmed in the western coastal waters of Korea, presumably by the loss of physiological viability. We evaluated the viability in terms of health indicators, the condition indices and hemocyte apoptosis rates of the oysters inhabiting two representative farming sites, Incheon and Taean each with different environmental variables. In our monthly measurements for the whole year 2013, the indicators were location specific. The condition indices of Incheon were highly variable, 1.67-8.58%, while those of Taean were less, 2.28-5.57%. The condition indices decreased during the spawning seasons, July and September in common. The two oysters exhibited also differed in the apoptotic activities of hemocyte, highly active, 4.03-30.15% for Incheon oysters and less active, 2.87-17.48% for Taean oysters. One thing we could identify was the two measurements were adverse during the critical seasons of spawning, reminiscent of being a useful tool for a health indicator for the oysters. Similar trend was also observed in the time when change in temperature was extreme. The findings in this study are highly indicative of health indicators for the oyster aquaculture.

댐유역 하천생태계평가를 통한 생태보전우선지역설정 -용담다목적댐 유역을 사례로-

임현정,이명우,Lim, Hyun-Jeong,Lee, Myung-Woo 한국조경학회 2011 韓國造景學會誌 Vol.39 No.2

본 연구의 목적은 댐 유역 하천코리도 생태경관 구역의 설정과 하천생태계평가를 통해서 생태적 가치가 높은 보전지역을 설정하는데 있다. 본 연구는 2008년에서 2009년까지 수행된 "용담 다목적 댐 및 저수지 주변지역 생태조사"의 일환으로 수행된 연구결과에 기초하였다. 연구대상지역인 용담호는 그 유역면적이 $930km^2$로서 진안, 장수, 무주에 걸쳐 있으며, 주요 유입하천에는 주자천, 정자천, 진안천, 구량천 등이 있다. 이 댐 호는 상수원으로 이용되고 있으나, 유역 내 골프장, 체육공원 등의 난개발이 발생하여 수질오염 및 생태계 훼손이 우려되는 지역이다. 하천코리도의 경관단위구역은 조사 및 도면 정밀도 등을 고려하여 250mm, 500mm, 750mm의 3단계 세부구역으로 구분하였다. 하천생태계 평가는 하천환경평가와 코리도권 식생환경평가의 2가지로 구분하였다. 하천환경평가에서는 어류 및 저서 생물의 종다양성과 고유화 빈도, 하천환경의 자연도 평가를 수행하였다. 식생환경평가에는 임상도, 식생보전등급, 조류 및 포유류의 종다양성과 법정 보호종의 유무 등에 대해서 평가하였다. 각각의 생태공간정보를 그 중요도에 따라 3등급화하였고, 최종적으로 이를 중첩하여 보전우선가치가 높은 지역을 설정하였다. 법정 보호종 출현지점은 절대보전지역으로 설정하였다. 본 연구는 자연환경지역의 보전가치를 평가하는 댐 유역 하천생태계 평가방법을 제시하여, 개별적 생태조사의 결과를 통합할 수 있는 틀을 제시하였다는데 의의가 있다. 야생동물의 행동권과 계절별 서식환경, 생물종 간 관계 등에 대한 연구와 이를 바탕으로 한 에코톱과의 관련성에 관한 연구가 진행되어야 할 것으로 판단한다. The purpose of this study is to specify the prior eco-preserve zone by establishing the eco-landscape unit on the stream corridor and evaluating the stream ecosystem in the dam basin. The fundamental ecological data was surveyed and collected through "the ecosystem project on Yongdam multipurpose dam watershed" from 2008 to 2009. The Yongdam Dam Watershed has several streams, Jujacheon, Jeongjacheon and Guryangcheon, of which the area is $930km^2$, stretching to Jinangun, Jangsugun and Mujugun Jellabukdo. In spite of being used for drinking purpose, the dam water quality and ecosystem is threatened by in-watershed pollution produced by development, golf course grounds and sports complex, etc. The landscape unit of stream corridor was zoned across by 250m, 500m, and 750m from the vicinity line of stream, which was decided to the accuracy of mapping and surveying. Types of evaluation are the Stream Corridor Evaluation(SCE) and the Vegetated Area Evaluation(VAE). In the process of SCE, several indices were analysed, fish species diversity, species peculiarity, and stream naturality. Indices for VAE were forest stand map, vegetation protection grade, species diversity and peculiarity for wild bird and mammal life. The importance of the ecological items is categorized into three levels and overlapped for specifying the prior preserve zone. The area at which legally protecting species appeared is categorized as absolute preserve area. This study might be meaningful for proposing the evaluation process of a stream corridor ecosystem, which can synthesize a lot of individual ecological surveys. We hope further research will be actively performed about the ecotope mapping which is based on a individual wildlife territory and habitats and also their relationships.

운문산반딧불이(Luciola unmunsana)의 서식지 특성과 먹이원에 관한 연구 - 전주시 산성천을 대상으로 -

임현정,김종만,정문선,Lim, Hyun-Jeong,Kim, Jong-Man,Jeong, Moon-Sun 한국환경복원기술학회 2022 한국환경복원기술학회지 Vol.25 No.3

This study aims to present primary data for habitat restoration and artificial breeding conditions of L. unmunsana by identifying the habitat conditions and the larvae's food sources. In order to investigate the habitat characteristics of the adult L. unmunsana and land snails, which are the primary food sources for the larvae, field surveys were conducted on a total of 10 habitats in south-central parts of Korea including Sanseongcheon, Jeonju. The results revealed that the L. unmunsana habitat in the Sanseongcheon area had a broadleaf forest with a multi-layered vegetation structure, adjacent water features, and the north/northeast/northwest slopes with little effect of artificial lighting. The adult L. unmunsana in the Sanseongcheon area appeared from the end of May to the end of June, and was especially intensively observed around the middle of June. The most active time was from 23:30 to 00:30 with a temperature range of 19~22℃ and higher than 80% humidity. The peak count of the observed adults L. unmunsana was a total of 774 on June 11, 2021. In the case of land snails, 11 families and 23 species were observed in 10 habitats of L. unmunsana, and Euphaedusa fusaniana was the most extensive and the most observed in the five survey areas. The land snails of L. unmunsana habitats are mostly found under the organic layers of leaves and a fallen tree branch in broadleaf forests, where a thick organic material layer buffers temperature changes and provides high humidity for various snails. These habitat conditions are suitable for the larva of L. unmunsana and land snails to inhabit, feed, hide and hibernate.

경험적 소비특성이 감정반응에 미치는 영향 -호텔이용동기의 조절효과를 중심으로-

임현정 ( Hyun Jeong Lim ),이화인 ( Wha In Lee ) 관광경영학회 2015 관광경영연구 Vol.65 No.-

The purpose of this study is the findings of the effects of the experiential consumption characteristics in the hotel business on customers` emotional responses. Especially, this study focuses on the moderating effects of customers` motives between experiential consumption characteristics and emotional responses. This researchers set up hypotheses referring to theoretical backgrounds and conducted a questionnaire for customers who visited the domestic five-star hotels. The findings are as follows. The First, playfulness, symbolism, usefulness and aesthetics had positive effects on customers` positive emotional responses but it had negative effects on customers` negative emotional responses. On the other hand, intercommunity showed the opposite effect. The second, customers` motives had moderating effects between experiential consumption characteristics and emotional responses. When experiential consumption characteristics had significant impact on positive emotions, usefulness is controlled by hedonic motivation and aesthetics is promoted by hedonic and conspicuous motivations. When experiential consumption characteristics had significant impact on negative emotions, symbolism is promoted by conspicuous motivation and usefulness is controlled by hedonic motivation and also aesthetics is controlled by practical motivation. Hotel companies will be able to effectively segment and target market on the basis of this empirical results.

DEHP 검출을 위한 퀀텀닷-압타센서와 휴대용 검출기 개발

임현정(Hyun Jeong Lim),Beelee Chua,손아정(Ahjeong Son) 대한환경공학회 2020 대한환경공학회 학술발표논문집 Vol.2020 No.11

SERVQUAL 및 IPA 분석을 활용한 OTT 서비스 운영 분석

임현정(Hyun Jeong Lim),조은주(Eun Ju Jo),지빈(Bin Ji),홍수인(Su In Hong),유승호(Seung Ho Yoo) 한국생산관리학회 2021 한국생산관리학회지 Vol.32 No.3

본 연구는 OTT(over-the-top) 미디어 서비스의 서비스 품질 및 서비스 운영의 전략 방향성을 조사 분석하는 연구이다. 서비스 품질의 분석을 위해 먼저 SERVQUAL 모형을 사용하였는데, OTT 서비스의 독특한 특성을 고려하여 확신성을 제외하고 컨텐츠성을 추가해 새롭게 서비스 품질 차원을 구성하였다. SERVQUAL을 통한 서비스 품질의 분석 후 IPA (importance-performance analysis)를 활용하여 중요도와 만족도에 따라 서비스 운영 요인들을 네 가지 영역으로 구분하여 어떤 요인에 더욱 집중해야 하는지 밝혀 국내 OTT 서비스 기업들을 위한 서비스 운영의 전략 방향성을 제시하였다. 성별 및 이용 빈도에 따라 SERVQUAL 분석 결과가 다르게 나타났는데, 여성의 경우 유형성 및 반응성, 남성의 경우는 반응성과 공감성 개선에 집중할 필요가 있다. IPA 분석 결과 가격과 최신 컨텐츠의 도입은 여성 및 남성 이용자 모두에게 가장 중요한 중점개선 요인들로 파악되었다. 하지만 남성보다 영향력이 클 수 있는 여성 이용자들에게는 만족스러운 컨텐츠의 제공이 부족함을 파악할 수 있었다. 각 성별에 맞는 차별적 컨텐츠 도입 및 운영의 중요성은 국내 OTT 업체들도 분명 중요하게 판단해야 할 부분이다. 급속도로 발전하며 변화해나가고 있는 OTT 서비스의 품질 차원을 새롭게 정의하고, 코로나19 판데믹 상황을 고려하여 서비스 품질과 서비스 운영의 전략적 방향성을 분석하는 방법을 제시한 데에서 본 연구의 학문적 중요성이 있다. 또한 본 연구는 시장 선도업체를 대상으로 한 연구를 통해 서비스 운영의 전략적 방향성을 차별적으로 매우 다양하게 제시하여 국내 OTT 기업들에게 중요한 시사점을 제공한다. This study investigates and analyzes the service quality of over-the-top (OTT) media service and the strategic directions of service operations. For the analysis of service quality, the SERVQUAL model is used. Considering the unique characteristics of OTT services, the dimensions of service quality are newly constructed by adding characteristics of contents. After analyzing OTT service quality, importance-performance analysis (IPA) is used to classify service operations factors into four areas by importance and performance. From this classification, strategic directions of service operations for domestic OTT service companies are derived. The SERVQUAL and IPA results differ according to gender and frequency of use. The importance of introducing and operating differentiated media contents suitable for each gender is an important point for domestic OTT companies to consider carefully. The academic significance of this study is that it newly defines the quality dimensions of OTT service, which is rapidly changing and developing, and suggests a method to analyze strategic directions of service quality and service operations in consideration of the COVID-19 pandemic. In addition, this study provides important implications for domestic OTT companies by presenting various strategic directions for service operations through research on the market leader.

동결건조한 Isochrysis aff. galbana 를 이용한 굴 유생사육에 관한 연구

임현정(Hyun Jeong Lim),박미선(Mi Seon Park),조지영(Ji Young Cho),홍용기(Yong Ki Hong) 한국수산과학회 1999 한국수산과학회지 Vol.32 No.5

To investigate an efficient microalgal feed for larval culture of the Pacific oyster Crassostrea grgas, we prepared three types of Isochrysis aff. galbana (T-iso): 1) freshly harvested feed, 2) concentrated feed and 3) freeze-dried feed. The chemical compositions and fatty acid content of these feeds were evaluated and survival rate and lipid content of oyster larvae fed by these feeds were also determined. There was no significant difference in all types of feed in the gross biochemical compositions. In the fatty acid composition, the freeze-dried feed showed a significant increase in the level of polyunsaturated fatty acid (PUFA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) than freshly harvested feed, especially EPA was 7.35-fold higher than freshly harvested feed. The survival rate of the oyster larvae was the hignest when the larvae were fed with a diet of 10% freeze-dried and 90% concentrated feed; it was 2.1-fold higher than that fed with freshly harvested food alone. Thereafter, the survival rate decreased with the increased substitutions of freeze-dried food, finally equalling that fed 100% freshly harvested feed at the 30% substitution. Larval lipid content of the oyster was also the highest when the larvae were fed with a diet of 10% freeze-dried and 90% concentrated feed. This increase was by 1.6-fold over that fed 100% freshly harvested cells. Thus feed produced during slack times, on a seedling aquaculture farm, and prepared as a freeze-dried diet can be used, mixed with concentrated feed, to supply diets more efficiently and to improve the larvae survival rate of Pacific oyster.

냉장보관된 농축 먹이생물의 지방산 조성 변화와 농축먹이로 사육한 굴 유생의 생존율

임현정(Hyun Jeong Lim),박승렬(Sung Real Park) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.4

cold storage of concentrated food phytoplanktons is a useful technique in supplying food organisms for artificial shellfish seed. One month after preservation at 4℃, we have measnred survival rate of the concentrated food phytoplanktons, Pavlova lutheri, Isochrysis galbana, Isochrysis aff. galbana and Chaetoceros calcitrans. Thereafter we determined survival rate of oyster larvae fed fresh and concentrated diets and fatty acid compositions of the fresh and concentrated food phytoplanktons. Survival rate of concentrated planktons ranged from 23% to 31% after one month at 4℃. The survival rate of oyster larvae fad cold shred food appeared generally higher than those fed fresh harvested food. Especially, the highest survival rate were found in the larbae fed cold stored concentrated I. aff. galbana. EPA and DHA increased after cold storage and the highest level of DHA was detected in I. aff. galbana. As DHA can role as an important factor in determing nutritional value, it would be better to use concentrated I. aff. galbana kept in cold refrigerator for oyster seed production.

맹꽁이 서식지 복원공사 중 포획 및 이주과정에 대한 연구 -전주시 삼천 생태하천 복원사업을 대상으로-

임현정 ( Lim Hyun-jeong ),김종만 ( Kim Jong-man ),정문선 ( Jeong Moon-sun ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2021 한국환경복원기술학회지 Vol.24 No.2

The purpose of this study is to provide basic data for habitat restoration by implementing a series of processes of capturing and translocating Kaloula borealis and managing them in artificial breeding facilities. The study site in Samcheon, Jeonju-si, Jeollabuk-do was a waste landfill site in the past, and Kaloula borealis was found during the Samcheon Ecological River Restoration Project around March 2018. To restore the habitat, a plan was established to capture, translocate, artificially breed, and release Kaloula borealis at the site. The capture methods of adult Kaloula borealis were pitfall trap and drift fence, direct capture, and deep barrels. During 2018-2019, 86 adults of Kaloula borealis were captured and translocated to artificial breeding facilities. VIE-tagging was inserted under the skin for monitoring. For artificial breeding, Gryllus bimaculatus with oyster powder and vegetables were regularly supplied to feed Kaloula borealis. At the end of October 2020, 150 young Kaloula borealis raised in artificial breeding facilities were found not entering hibernation, so they were managed in a separate artificial breeding facility. Some young and adult Kaloula borealis currently hibernating will be sched-uled to be continuously managed in artificial breeding facilities and released to the restored habitat in the spring of 2021.

갯벌참굴 (Crassostrea gigas) 양식을 위한 부착기질별 하나굴 종묘 생산과 수평망식 시설을 이용한 배수체별 치패 성장 비교

임현정 ( Hyun Jeong Lim ),이태식 ( Tae Seek Lee ),조필규 ( Pil Gue Cho ),백상호 ( Sang Ho Back ),변순규 ( Soon Gyu Byun ),최은희 ( Eun Hee Choi ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.3

To produce cupped oyster sprat consistently, we investigated the efficiency of nine settlement substrates using selective breeding of Pacific oyster Crassostrea gigas, with the goal of popularizing off-bottom culture on the west coast of Korea. We also compared the growth and survival of selectively bred sprat (diploid) with triploid sprat from an off-bottom culture system. Considering, the attachment rate and detachment efficiency, producing cupped oyster in a polypropylene gunny bag proved to be the most effective method. There were no differences in shell growth or total weight between the diploids from selective breeding and triploids from off-bottom culture for 5 months. However, the survival rate was 8 times higher in the diploids than the triploids. Transplanting sprat from selective breeding is one way to restore oyster farms and nurture off-bottom culture along the west coast.