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        검색결과 56

        22.
        2018.07 구독 인증기관·개인회원 무료
        This paper investigates a theoretical and experimental evidence for a niche strategy for small and medium online shopping malls to survive against large famous shopping malls dominating the E-commerce market. The present study explored both theoretically and empirically how consumers’ preferences for alternatives in online shopping context are affected by their construal level and concentrated its efforts on the verification of the phenomenon under various frames and regarding various categories(Liberman and Trope 1998; Liberman, Trope, and Stephan 2007, Liberman Trope, and Wakslak 2007). For this, this study demonstrates how chronic construal levels of consumers may affect their alternative choice for online shopping via various contexts (Experiment 1-3) and categories (Experiment 3-5). This series of experiments suggests that consumers with high construal level can be defined as a group that is relatively less susceptible to reputation of the shopping malls. Thus, strategically targeting this group of consumers will help small online malls lacking store reputation to mitigate their competitive disadvantage. Based on both existing literature and the experimental results as above, this research discusses possible methods for small online shopping malls to target high-construal segmentation.
        23.
        2018.07 구독 인증기관·개인회원 무료
        Customer management based on Customer lifetime value has emerged as the most effective way of doing business due to the ability to foster profitable CRM (Verhoef & Lemon, 2013; Villanueva & Hanssens, 2007). Although there has been much conceptual evidence of the positive link between customer equity and firm’s performance(Blattberg, Malthouse, and Neslin 2009), comparison of relationships between two competing firms based on customer equity and firm profitability is limited. Therefore, this research examines the role of customer equity on the firm profitability by comparing the company type such as leader and follower in customer equity setting. The result shows that the effect of newly acquired Customer equity of the second tier company is stronger than that of the top tier company while the effect of retained customer equity of the top company is stronger than that of the second tier company. Overall, the results provide strategic implications for firms to use a different customer equity strategy in a competitive market structure.
        25.
        2016.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        To investigate the photosynthesis and growth of Cymbidium ‘Red Fire’ grown under different nitrogen fertilization and night-interruption (NI) illumination, we exposed plants to 9-h short days (SDs), SDs + 3 - 7 μmol·m-2·s-1 NI (low-light intensity of NI, LNI), or SDs + 120 μmol·m-2·s-1 NI (high-light intensity of NI, HNI) illumination with nitrogen supplemented at 0, 100, 200, or 400 mg·L-1. Cymbidium photosynthesized under 3 – 7 μmol·m-2·s-1 NI regardless of nitrogen treatment, promoting growth. HNI treatments and nitrogen supplements at 100 mg·L-1 increased the leaf chlorophyll concentration. LNI increased net CO2 assimilation (An), transpiration, and stomatal conductance. HNI without supplemental nitrogen reduced midday An. However, HNI with supplemental nitrogen increased midday An. Supplemental nitrogen should be provided to Cymbidium when high-irradiance NI is used to promote growth.
        4,000원
        26.
        2016.07 구독 인증기관 무료, 개인회원 유료
        Firms acquire customers using myriad forms of marketing media (Neslin & Shankar 2009), and different media strategies yield different results to the firms. Therefore, allocating media strategy given a firm’s spending raises important questions for managers. This is especially the case since the media landscape has changed dramatically, with new media channels incorporating online, mobile, and social media now being considered the mainstream. It is crucial to understand how each form of media influences consumers and how it operates alongside traditional media. Based on Stephen and Galak (2012), marketers distinguish earned media from paid media. Earned media is defined as media activity that a company does not directly generate, such as press mentions on the internet and online community posts in consumer-generated social media. On the other hand, paid media refers to the media activity which a company generates (for example, television, radio, print, and direct mail). It is common for firms to consider using earned media and paid media at the same time when developing marketing communication strategies. Despite the coexistence of paid and earned media channels, previous empirical findings focus either on paid media or earned media and suggest that these individually will increase a firm’s marketing outcomes. However, there is a lack of research that examines the question of whether the use of paid media and earned media at the same time is synergistic. The effects of a cross media synergy only focuses on the resource allocation within paid media (for example, TV–Radio (Edell & Keller 1989), TV–Magazine (Confer & McGlathery 1991), TV–Print (Dijkstra, Buijtels, & Van Raaij 2005), and TV, Radio, Print and Outdoor (Briggs, Krishnan, & Sheeran 2003)). Thus, by considering paid media and earned media concurrently, this study investigates whether the synergies between paid and earned media have a stronger effect on a firm’s long term profitability than the isolated effects of TV or word of mouth (WOM) alone. In addition, the research on earned media has focused on short-term outcomes such as customer actions (for example, website sign-ups) and sales growth, sales rank, cross-product sales, and ratings (Trusov, Bucklin, & Pauwels 2009; Li & Hitt 2008; Moe & Trusov 2011). Moreover, in the limited research on the relationship between earned media and long-term outcomes, the outcomes are restricted to those related to soft metrics of communication effectiveness (for example, attitude and brand awareness). Therefore, we use customer equity, which is regarded as a forward looking firm outcome variable, thereby enabling marketers to monitor and measure the long-term financial impact of marketing spending (Kumar & Shah 2015). Moreover, cross-media synergy can be accurately measured by customer equity, which incorporates both customer acquisition and retention. Based on Villanueva, Yoo, and Hassens (2008), customers acquired through paid media focus more on trials, whereas customers acquired through earned media provide the firm with more repeats. In other words, paid media plays a key role in the acquisition of customers, while, on the other hand, earned media increase the retention of customers. Thus, it is appropriate to measure the cross-media synergy with the customer equity (long term profitability) that can capture the customer acquisition and retention simultaneously. Regarding the long term impact of the firm’s media strategy, previous research has used the economic impact of traditional marketing channel (for example, television, radio, magazine or newspaper, advertisement, e-mail links, and direct mail) versus that of WOM (for example, links from Web sites, magazine, or newspaper articles, referrals from friends or colleagues, referrals from professional organizations or associations, and referrals from search engines) on customer equity. Traditional marketing had a stronger effect than WOM in the short term, while WOM is a quiet, gradual-impact, long lasting driver (Villanueva, Yoo, & Hassens 2008). This result can be attributed to the different characteristics of each media channel. Although earned media, including WOM, is not entirely controlled by the firm, earned media may be more likely to last longer for various reasons. One of the reasons for this phenomenon is that earned media has greater credibility than conventional marketing activities that are implemented by the firms, and is therefore more persuasive than conventional advertising (Brown & Reingen 1987, Villanueva, Yoo, & Hassens 2008). In other words, considering the impact of each type of media in itself, earned media is more effective in increasing long-term profitability. However, the interaction effect of earned and paid media has not been empirically tested yet. Thus, it is conceivable that a cross-media synergy (incorporating the implementation of earned media and paid media at the same time) will last longer than the implementation of each isolated media. As Armelini and Villanueva (2010) pointed out, earned media and paid media have complementary effects. For example, offline advertising increases website visitation by influencing consumer awareness, while online advertising directly leads to website traffic (Ilfeld & Winer 2002). The consumer buying process involves distinct stages such as awareness, consideration, and purchase (Lavidge & Stener 2000) and each media influences customer buying behavior in a different way. Hence, it enhances the effectiveness in terms of long-term profitability to utilize the cross-media effect properly. For example, in the car industry, 64 % new car buyers become aware of the features and benefits of a car by obtaining information online, even though they purchase their cars from an offline dealership (J.D. Power and Associates 2004). This finding implies that a firm’s implementation of both paid and earned media properly will maximize the customers’ arousal of the target brands. Furthermore, converging paid media and earned media is expected to proliferate the growth of a firm’s profitability, such as sales, revenue, and customer’s equity, at an exponential rate. For example, the effects of TV advertising execution can be enhanced by press mentions that a company does not directly generate; this is because press mentions support the credence of TV advertising. Inversely, since paid media activities reach the audience relatively more than WOM (due to the high audience penetration share), the online share of press mention can proliferate rapidly with the execution of paid media activities. Therefore, the interaction between earned media and paid media has a greater effect on customer equity than isolated media implementation. The impact of a media synergy has more positive effect and last longer than isolated media implementation (and our model is displayed in Fig. 1). We collect data on marketing efforts, word-of-mouth circumstance, and performance of a telecommunication company. Based on customer equity models and quarterly marketing and performance data, we first estimate the lifetime value of the newly acquired and existing customers. Thereafter, we determine the customer equity of the company over each period. We develop and employ a time-series model for examining the relationship between cross media efforts (paid media vs. earned media) and the estimated firm’s customer equity. Finally, we examine the synergistic effect of cross media on the firm’s long-term profitability.
        3,000원
        27.
        2016.07 구독 인증기관·개인회원 무료
        Although there has been much conceptual evidence of the positive link between customer equity and firm’s performance, comparison of relationships between two firms based on customer equity and firm profitability is limited. However, there is an increasing demand for research that investigates the relationship between firms in the competitive market structure. Therefore, the goal of this research is to examine the role of customer equity on firm profitability by comparing two firms, in a customer equity setting. The result shows that the effect of newly acquired CE of the second top company is stronger than that of the top company while the effect of retained CE of the top company is stronger than that of the second top company. Overall, the results offer strategic implications for firms to implement a different customer equity strategy in this competitive market structure.
        28.
        2016.07 구독 인증기관·개인회원 무료
        The Social Network System (SNS) has possesses unique characteristic which distinguish it in important ways from traditional communications environment because the social network system allows a fundamentally different environment for communication marketing activities. The traditional marketing communications model was uni-directional, due to the fact that mass communication is a one-to-many process whereby a company transmits content through a medium to a large group of people. Today, communication paradigm has shifted online and is many to many, known as a bi-directional strategy. Bi-directional strategy mediates communications model in which 1) consumers can interact with the medium and with each other, 2) companies can provide content to the medium and interact with each other, 3) companies and consumers can interact, and in the most radical departure from traditional marketing environments to determine how brand relationship is affected. In this paper, we use the social network system as a new marketing communication medium. We use the key Mohr & Nevin’s communication strategies: frequency, direction, content, and modality to measure communication quality, and then implement communication quality by using the attitude and e-WOM intentions. Rich understanding of SNS communication quality can help focus the managerial efforts on vital communication factors, which stimulate positive assessments of communication behaviors. Furthermore, practitioners may better understand which dimensions of communication facets/aspects are more appropriate
        29.
        2016.07 구독 인증기관·개인회원 무료
        Given the pervasive use of brand personification by marketers, it is surprising that there has been extremely limited research directly examining the effects of brand personification. In this article, we attempt to fill this gap in part by exploring how personified brand, in contrast to an objectified brand, might affect consumers’ response. Also, previous research have studied mainly on the visual or combined (visual-verbal) brand personification without differentiating the two types of brand personification. Therefore, this study tries to focus on the verbal brand personification which has not been studied extensively. And there are two types of verbal brand personification: external and internal image. So this study validates the effect of internal (kind) or external (looking good) verbal brand personification separately in the series of two experiments. Study 1 tests the effect of internal verbal brand personification on the consumer evaluation using product brand. Specifically, we test the moderating effect of brand knowledge between verbal brand personification and consumer evaluation and explore the underlying mechanisms (brand intimacy, psychological discomfort) about how the interaction effect of personification level and brand knowledge occurs. Study 2 tests the effect of external verbal brand personification on the consumer evaluation using service brand. Specifically, we test the effect of need-for-cognition on attitude towards personified brand ad and additionally explore the underlying mechanisms (perceived novelty, cognitive resistance) about how need-for-cognition influences. This research could provide useful guidelines for the marketers to utilize personification method when planning the head copy or slogan for advertisement. Therefore, marketers are better able to make an effective brand personification strategy through understanding the boundary conditions and mechanisms about the impact of brand personification based on the findings of this study.
        30.
        2016.07 구독 인증기관·개인회원 무료
        The purpose of this study is to present theoretical and experimental evidence for a niche strategy for small and medium online shopping malls to run business against large famous shopping malls prevailing the E-commerce market. For this, the present study demonstrates how chronic construal levels of consumers may affect their alternative choice for online shopping via various contexts (Experiment 1-3) and categories (Experiment 3-5). This series of experiments suggests that consumers with high construal level can be defined as a group that is relatively less susceptible to reputation of the shopping malls. Thus, strategically targeting this group of consumers will help small and medium-sized online malls lacking store reputation to mitigate their competitive disadvantage. Based on both existing literature and the experimental results as above, this research discusses possible methods for small and medium-sized online shopping malls to target high-construal segmentation.
        31.
        2016.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, bulk nickel-carbon nanotube (CNT) nanocomposites are synthesized by a novel method which includes a combination of ultrasonication, electrical explosion of wire in liquid and spark plasma sintering. The mechanical characteristics of the bulk Ni-CNT composites synthesized with CNT contents of 0.7, 1, 3 and 5 wt.% are investigated. X-ray diffraction, optical microscopy and field emission scanning electron microscopy techniques are used to observe the different phases, morphologies and structures of the composite powders as well as the sintered samples. The obtained results reveal that the as-synthesized composite exhibits substantial enhancement in the microhardness and values more than 140 HV are observed. However an empirical reinforcement limit of 3 wt.% is determined for the CNT content, beyond which, there is no significant improvement in the mechanical properties.
        4,000원
        32.
        2016.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, Fe-Cu-Ni-Mo-C low alloy steel powder is consolidated by spark plasma sintering (SPS) process. The internal structure and the surface fracture behavior are studied using field-emission scanning electron microscopy and optical microscopy techniques. The bulk samples are polished and etched in order to observe the internal structure. The sample sintered at 900oC with holding time of 10 minutes achieves nearly full density of 98.9% while the density of the as-received conventionally sintered product is 90.3%. The fracture microstructures indicate that the sample prepared at 900oC by the SPS process is hard to break out because of the presence of both grain boundaries and internal particle fractures. Moreover, the lamellar pearlite structure is also observed in this sample. The samples sintered at 1000 and 1100oC exhibit a large number of tiny particles and pores due to the melting of Cu and aggregation of the alloy elements during the SPS process. The highest hardness value of 296.52 HV is observed for the sample sintered at 900oC with holding time of 10 minutes.
        4,000원
        33.
        2016.04 구독 인증기관·개인회원 무료
        Although expression of foreign genes in a crop species has been target techniques for powerful protection against insect pests, classical breeding programs using varietal resistance of a crop are still being processed. It is, however, frequently difficult to find key products expressed from resistance-related genes in the variety, and those action mechanism. Here, an unterminated story about seed of a mungbean (Vigna radiata) variety with high resistance against the adzuki bean weevil and the bean bug is introduced. The two insects cannot survive on seeds of the variety, although they well develop on susceptible ones. Molecular markers linked to the resistance were selected through BAC library screening and near isogenic lines, and finally a bruchid resistance gene was suggested after map-based cloning approaches. Starvation and chemicals were suggested for a resistant mechanism and a related factor through feeding and behavior experiments, respectively. The seed flour was extracted with organic solvents, and isolated into several fractions on chromatography. Several peaks on HPLC in a fraction were related with the high mortality of the bean bug. A partial structure in an isolated chemical was observed before full identification.
        34.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We identified research trends for freshwater exotic species in South Korea using text mining methods in conjunction with bibliometric analysis. We searched scientific and common names of freshwater exotic species as searching keywords including 1 mammal species, 3 amphibian-reptile species, 11 fish species, 2 aquatic plant species. A total of 245 articles including research articles and abstracts of conference proceedings published by 56 academic societies and institutes were collected from scientific article databases. The search keywords used were the common names for the exotic species. The 20th century (1900’s) saw the number of articles increase; however, during the early 21st century (2000’s) the number of published articles decreased slowly. The number of articles focusing on physiological and embryological research was significantly greater than taxonomic and ecological studies. Rainbow trout and Nile tilapia were the main research topic, specifically physiological and embryological research associated with the aquaculture of these species. Ecological studies were only conducted on the distribution and effect of large-mouth bass and nutria. The ecological risk associated with freshwater exotic species has been expressed yet the scientific information might be insufficient to remove doubt about ecological issues as expressed by interested by individuals and policy makers due to bias in research topics with respect to freshwater exotic species. The research topics of freshwater exotic species would have to diversify to effectively manage freshwater exotic species.
        4,000원
        35.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        River channel dredging and riparian development have been influenced morphology and quantity of natural river habitat. We compared distribution of riverside land and alluvial island in the Nakdong River with field survey and remote sensing analysis after the 4 Large River Project in South Korea. We digitized geomorphological elements, includes main channel, riverside land, and alluvial island by using georeferenced aerial photos taken in pre-dredging (2008) and post-dredging (2012) periods. Field survey was followed in 2012 for a ground truth of digitized boundaries and identification of newly constructed wetland types such as pond, channel, branch, and riverine type. We found that during the dredging period, riverside land and alluvial island were lost by 20.2% and 72.7%, respectively. Modification rate of riverside land was higher in the section of river kilometer 50~90, 140~180, and 210~270. Alluvial island had higher change rate in the section of river kilometer 50~70, 190~210, and 270~310. Average change rate for the riverside land and alluvial island was - 1.02±0.14 km² ·10 km¯¹ and - 0.05±0.05 km² ·10 km¯¹, respectively. Channel shaped wetlands (72.5%) constituted large portion of newly constructed wetlands.
        4,000원
        36.
        2015.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Flowering responses under night interruption (NI) condition were determined in Doritaenopsis ‘Fuller’s Sunset ’, ‘Green Beer’, ‘Little Gem Stripes’, and ‘Queen Beer’ during their reproductive stages. Plants were grown under 10/14 h ambient light/dark (control), 10 h ambient light with night interruption (22 : 00-02 : 00 HR) at low light intensity of 3-7 μmol • m−2 • s−1 (LNI) and 10 h ambient light with NI at high light intensity of 120 μmol • m−2 • s−1 (HNI) conditions after flower spike emergence. Time to visible bud and flowering decreased more in the plants grown under HNI than those grown under LNI or control conditions. The number of buds or flowers increased in the plants grown under both LNI and HNI conditions compared to those grown under control condition for all cultivars. The tallest plants at flowering were in the HNI group in ‘Queen Beer’, ‘Green Beer’, and ‘Fuller’s Sunset’, however, the plant height was not significantly different among the treatments in ‘Little Gem Stripes’. NI with low light intensity or high light intensity can be used effectively to promote flower opening, but not with low light intensity at flower development stage. To obtain early flowering with high quality plants using NI treatment during their reproductive stage, high light intensity strategies could be suggested in Doritaenopsis cultivation.
        4,000원
        37.
        2014.11 구독 인증기관·개인회원 무료
        최근, 우리나라에서는 4대강 건설 사업의 일환으로 4대 강 유역에 인공보 및 어도 (Fishway)들이 완공되어 가동중 에 있고, 이들에 대한 수리수문학적 특성, 이화학적 수질 및 퇴적물 축적에 대한 모니터링이 실시되고 있다. 이러한 급격한 물리적인 수체의 특성 변화는 궁극적으로 어류 종 분포특성 및 어류 이동성에 변화를 가져올 수 있는 바 이에 대한 모니터링 및 어류 이동성 평가 기법 적용이 불가피하 나 이에 대한 복합적 연구는 아직도 극히 미미한 실정이다. 따라서 본 연구에서는 어도 및 인공보에서 어류의 이동성 평가 및 평가 모니터링 기법에 대하여 소개하고자 한다. 어류의 이동성과 어도 효율성을 평가하기 위하여 영산강 수계의 중·하류역에 건설된 인공보 (승촌보, 죽산보) 및 어 도 (Fishway)를 대상으로 다음과 같이 다각적 어도 평가 모니터링 기법을 적용하였다. 어도 및 인공보에서 어류이동 성평가를 위해 1) Visual fish 모니터링기법, 2) Video 촬영 기법, 3) Mark-recapture 태깅기법, 4) Passive Integrated Transpondent (PIT)-tagging 기법, 5) Acoustic transmitter 삽입을 통한 장거리 이동성 모니터링기법 (Acoustic telemetry) 및 6) Echo-sounders 모니터링 기법 등의 연구방 법을 적용하였다. 국내 수생태계의 경우 최근 소형 보 및 댐의 건설로 서식 하는 토착종과 고유종 들이 감소하고 있고, 복원 및 보존을 위해 각 어종의 미소서식지에서의 분포양상, 행동 및 이동 양상을 파악하기 위한 이동성 평가 연구가 선행되어야 함에 도 불구하고 현재까지 국내 담수에 분포하는 어류의 대부분 은 이동여부가 1-2개의 기법 적용으로 복합적으로는 파악 되지 않고 있으며 매우 제한적으로 이루어져 왔다. 현재까 지 우리의 회귀성 어종의 경우, 산란 시기에 어떠한 외부적 요인에 의해 언제 이동하는지 또한 얼마나 이동하며 어디까 지 이동하는 지에 대한 내용이 알려진 바가 없다. 따라서 본 연구를 통하여 ① PIT 및 Acoustic telemetry (원격측정 법) 연구를 위한 기본 자료를 확보하고 tag의 적용성과 효율 성을 검증할 수 있다. 또한, ② PIT 및 Acoustic tag을 외과 적 수술을 통하여 어류에 이식한 후 대상 생물의 이동경로 를 파악할 수 있으며 ③ 대상어종의 선호하는 서식처 특성 과 이동 시기, 방법 등에 대하여 파악할 수 있다. 또한 이들 ④ 회귀성 어종의 보존방안과 하천관리를 위한 자료를 습득 하여 본 결과를 활용한 타 수계 적용 할 수 있어 향후 ⑤ 회귀성 어종 보존과 이와 연계한 하천복원에 대한 기초자료 를 제공할 수 있다.
        38.
        2014.11 구독 인증기관·개인회원 무료
        본 연구는 우리나라에 분포하는 23개의 댐 및 관계용 인 공호를 대상으로 표층에서 수질 인자의 경험적 모델, 수질 인자가 장기간 서식하는 어류 섭식 길드 및 구조에 미치는 영향을 분석하였다. 표층 수질 인자의 분석은 물환경정보시 스템에서 자료 (2005년 – 2011년)를 획득하였으며 총질소 (TN), 총인 (TP), 엽록소-a (Chl-a), 투명도 (SD) 등 트로픽 변수가 수질 분석에 이용되었다. 경험적 수질 인자의 관계 는 로그 변환된 트로픽 변수를 이용하여 선형회귀분석하였 다. 계절별 분석에는 장마기를 중심으로 장마전기(5-6월, Pr), 장마기 (7-8월, Mo), 장마후기 (9-10월, Po)를 기초로 대별하였다. 어류 섭식 길드의 분석은 충식종 및 잡식종의 상대풍부도 (RA, %)를 산정하여 장기간의 수질 변화에 의 한 이들의 분포 특성을 분석하였다. 트로픽 변수를 이용한 경험적 수질 관계 분석 결과 Chl-a의 변이는 TP (R2 range: 0.57-0.70)에 의해 주로 설명되지만, TN (R2 range: 0.04-0.23)은 거의 설명하지 못하는 것으로 나타났다. 경험 적 수질 관계에서 TP-Chl-a, TP-SD, Chl-a-SD의 결정 계수 (R2)는 장마후기 (Po)에 가장 높은 것으로 분석되어, 이 시 기의 부영양화 특성이 가장 뚜렷하게 나타났다. 장기간의 수질 변화에 대한 어류의 섭식 구조에 따르면 수질이 악화 됨에 따라 잡식종은 뚜렷한 상관성을 보이는 것으로 분석되 어 저수지의 오염특성을 반영하는 것으로 나타났다.
        39.
        2014.11 구독 인증기관·개인회원 무료
        The objectives of this research were to determine spatial patterns of fish well and this spatial patterns were closely associated with physical habitat and chemical water quality. Such relations of physical habitat and chemical water quality to high trophic-level biota (i.e., fish) are very complex in analyzing the cause-effective relations due to large ecological dataset, thus an approach of self-organizing map (SOM) has been proposed in elucidating complex ecological relations of aquatic ecosystems. Communities from up-stream to down-stream of Geum River using an approach of Self-Organizing Maps (SOMs) and analyze their relations to water chemistry. For the study, fish and water samplings were conducted in 130 different streams and rivers during 2008 - 2009. The analysis of data using the SOMs model showed that fish community had longitudinal gradients of up-stream, mid-stream and down-stream. The clustering of the trained SOMs units reflected the stream morphology, land-use pattern and water quality, resulting in influenced the ecological trophic compositions and tolerance of top-level fish in the aquatic ecosystem
        40.
        2014.11 구독 인증기관·개인회원 무료
        본 연구는 금강 수계 일부 지역에서 한정적으로 서식하는 멸종위기 1급 어종인 미호종개 (Cobitis choii)의 서식 현황 과 적합한 서식지 환경 조건을 파악하기 위하여 실시하였 다. 미호종개 (Cobitis choii) 는 미호천의 인근 수계 및 금강 일부 지역에 한정적으로 서식하는 한국 고유종으로 미호종 개를 법적으로 보호하기 위해서 환경부 멸종위기종으로 지 정하여, 현재 천연기념물 (제454호)로 지정되어있다. 조사 는 백곡천, 유구천, 갑천에서 각각 실시하였으며, 미호종개 (Cobitis choii)의 개체수는 평균 2.6 개체가 채집되어 극히 희소하게 분포되어 있는 종으로써 종 보존이 아주 시급한 것으로 나타났다. 미호종개가 출현한 지역의 하상구조는 60% 이상이 가는 모래로 이루어져있고, 평균 1㎜ 크기의 모래입자에서 가장 높은 빈도로 출현하는 것으로 분석되었 다. 또한, 최적 서식지 조건으로 최적 수심은 20 - 60㎝로 비교적 얕고, 최적 유속은 0.4 m3/s 이하의 느린 흐름과 소 가 반복적으로 나타나 최적 유량 범위가 0 - 2 m3/s 인 구간 에서 주로 서식하는 것으로 나타났다. 미소서식처는 하천정 비 등의 인위적인 요인과 도심과 농경지로부터의 영양 염류 유입에 민감하게 반응하여 직접적인 영향을 주는 것으로 알려져 있다. 따라서, 멸종 위기종인 미호종개의 보존을 위 해서 향후 대체서식지를 마련되어야 될 것으로 사료된다.
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