• 한국어류학회지
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• 제23권1호
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• pp.37-45
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• 2011

진해만 남서부에 출현하는 자치어 종조성의 계절변동을 연구하기 위하여 2009년 1월에서 12월까지 매월 RN80 네트을 이용하여 시료를 채집하였다. 조사 기간 동안 24과 46종의 자치어가 채집되었다. 우점종은 청어(Clupea pallasii), 쥐노래미(Hexagrammos otakii), 전어(Konosirus punctatus), 멸치(Engraulis japonicus), 청베도라치(Parablennius yatabei), 앞동갈베도라치(Omobranchus elegans) 순으로 많이 채집되었는데 이들 6종은 전체 채집개체수의 92.7%를 차지하였다. 어종수, 채집 개체수, 종다양도지수는 뚜렷한 계절 변동을 나타내었다. 종수와 개체수는 각각 7월과 1월에 가장 높은 값을 나타내었다. 주성분분석(PCA)와 상관분석은 군집구조와 우점종들의 출현량이 수온과 유의한 관계가 있음을 보여주었다. 특히, 청어, 쥐노래미, 멸치, 청베도라치의 출현량은 수온과 유의한 관련성이 있었다.

• 한국어류학회지
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• 제27권3호
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• pp.233-237
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• 2015

동해 감포 연안에서 2005년 6월, 9월 및 12월, 그리고 2006년 3월에 통발에 어획된 어류 종조성을 분석하였다. 조사기간 동안 총 4목 10과 19종의 어류가 채집되었다. 채집된 어류 가운데, 가장 많이 채집된 종은 붕장어 (Conger myriaster)로서 채집 개체수의 38.9%, 생체량의 52.2%를 차지하였다. 그 다음으로는 복섬 (Takifugu niphobles), 조피볼락 (Sebastes schlegelii), 점망둑 (Chaenogobius annularis), 노래미 (Hexagrammos agrammus), 쥐노래미 (Hexagrammos otakii) 등이 비교적 많았다. 이 5종은 전체 개체수의 44.1%, 전체 생체량의 37.3%를 차지하였다. 종수는 2006년 3월에 가장 많았고 2005년 12월에 가장 적었다. 개체수와 생체량은 2005년 9월에 가장 많았고 2005년 12월에 가장 적었다.

• 수산해양기술연구
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• 제59권4호
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• pp.301-314
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• 2023

Long term variations of fish assemblage in the coastal waters of Bukchon-ri were determined using samples collected by trammel net from 2012 to 2022. Water temperature increased by 0.4℃ in 2022 that was less then 2012. During the survey period, a total of 95 species (53 families and 15 orders) of fishes were identified, Scorpaeniformes (five families and 22 species) and Perciformes (25 families and 39 species) accounted for 73% of the total number. The number of species was higher in summer than winter, showing a peak in summer at 66 species and lower in winter and autumn at 45 species. The number of individuals and the biomass peaked in summer at 1,238 individuals and 280.1 kg, and were the lowest in autumn at 597 individuals and 155.4 kg. The annual diversity index, evenness index and richness index were appeared 2.11-2.80, 0.64-0.80 and 4.70-7.34 at each years. The dominance index were appeared highest in 2014 while 2021 were appeared the lowest in 2017. The subtropical fishes were identified total of 38 species (40.0%) and the number of species was higher in 2022 at 22 (52.4%) species and lower in 2015-2017 at each 10 (31.3-37.0%) species. The dominant species of subtropical fishes were appeared rabbit fish (Siganus fuscescens), boxfish (Ostracion immaculatus), smallscale blackfish (Girella melanichthys), flag fish (Goniistius zonatus), stripey (Microcanthus strigatus), rock porgy (Oplegnathus punctatus), and bluestriped angelfish (Chaetodontoplus septentrionalis) in study sites.

• 한국환경과학회지
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• 제27권8호
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• pp.689-699
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• 2018

The changes on community structures of benthic macroinvertebrates, relevance to the environment and interrelationship between benthos were studied over two years in stream with large environmental disturbance, which caused by localized heavy rain during Typhoon Chaba in October 2016. As a result, the number of species and individuals were increased after localized heavy rain, especially numbers of individuals of Ephemeroptera and Plecoptera were greatly increased. On the contrary, those of Semisulcospira libertina and Semisulcospira forticosta of Mesogastropoda were greatly decreased. Dominant species was Baetis fuscatus of Ephemeroptera, numbers of species and individuals of Ephemeroptera, Plecoptera and Trichoptera(EPT group) were dramatically increased from 26 species, 110 individuals to 32 species, 365 individuals respectively. This suggests that the change of river bed and flow velocity due to heavy rain provided a suitable environment for the EPT group that preferred the rift of a stream. In the functional feeding group, only gathering collectors and filtering collectors were identified in autumn of 2017 because some functional groups preferentially adapted to the changed environment. The interspecific competition and environmental condition were the worst in autumn after heavy rain due to the increase individuals of some species. The ecological score of benthic macroinvertebrate community(ESB) was higher after the heavy rain than before. Results of the Group Pollution Index(GPI), Korean Saprobic Index(KSI) and Benthic Macroinvertebrate Index(BMI) were similar to those before and after heavy rainfall. Therefore, ESB was the most discriminating method for estimating the biological water quality in this study. Some species that are sensitive to water quality changes still appear or increase individuals in the area under investigation after the heavy rain. On the other hand, the individuals of some pollutant species decreased. This is thought to be because the habitat fluctuation caused by heavy rainfall has improved the water environment.

• 환경생물
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• 제23권1호
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• pp.71-88
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• 2005

강원대학교 학술림내 연엽산 일대의 딱정벌레목 군집에 관한 연구를 위하여 2004년 4월부터 9월까지 총 6회의 조사를 실시하였다. 연엽산 일대에 4개의 지점을 정하여 light trap, pitfall trap, 그리고 sweeping의 3가지 방법으로 조사한 결과 총 48과 358종 3053개체가 출현하였다. 가장 많은 종이 출현한 과는 Carabidae로 50종이 출현하였고, 다음으로 Chrysomelida 가 40종 그리고 Curculionidae가 40종의 순으로 나타났다. 지점별로는 고도가 낮고 하천이 있는 지점 4에서 가장 많은 종이 출현하였고, pitfall trap에 많은 개체수가 채집된 지점 2에서 가장 많은 개체수가 출현하였다. 월별로는 7월에 가장 많은 종수와 개체수가 출현하였다. 우점종은 Nicro-phorus (Nicrophorus) quadripunctatus (13.00%), 아우점종은 Synuchus (Synuchus) cycloderus (7.17%)이었다. 특히 환경부 보호종인 Damaster mirabilissimus mirabilissimus가 5월에 1개체 출현하였다.

• 수산해양기술연구
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• 제50권2호
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• pp.115-123
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• 2014

A total of 164 individuals of Hippocampus coronatus were collected from an eelgrass bed in Dongdae Bay, Korea from September 2006 to August 2007. The number of individuals of H. coronatus was higher in September 2006. The size of H. coronatus ranged from 2.4 to 9.3cm in height (Ht), and most of individuals were small size below 5cm (Ht). H. coronatus was a carnivore which consumed mainly gammarid amphipods and copepods. Its diets also included a small amount ofmysids, ostracods, brachiopods, caprellid amphipods, bathynellaceas, isopods, tanaids, and ascothoracids. The diets of H. coronatus underwent size-related changes; smaller individuals consumed copepods, while larger individuals ate gammarid amphipods and mysids. The dietary breadth index of H. coronatus was increased with increasing of their size.

• 대한가정학회지
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• 제44권3호
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• pp.1-11
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• 2006

Although the personal credit rating has become more important than ever before in our era, a significant number of social problems have occurred due to the rising number of individuals and households with low credit ratings. The main objectives of this research are to determine effective policies of social remedies through an investigation of recognition, expectation, and utilization levels of relevant public policies available to assist individuals with low credit ratings. The sample population was taken from the credit defaulters who had visited the Credit Recovery Commission. The research was undertaken from April 28 to May 4, 2004. This study focused on the related variables concerning the degree of utilization of remedial public policies. The results showed that females, less educated individuals, and those with higher levels of expectation and recognition were more likely to utilize remedial policies. Based on the research, conclusions regarding the usage of public remedial policies for credit defaulters are as stated below. Education for households should be conducted in order to increase the expectation and recognition levels of relevant policies.

• 한국수산과학회지
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• 제44권2호
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• pp.173-178
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• 2011

The species and size compositions of fishes in the coastal waters off Taean were determined using samples collected with a two-sided fyke net in 2008. A total of 22 species, 2,371 individuals and 1,351 kg of fish were collected during the study. Of the fish collected, semi-benthic fishes such as Sebastes schlegelii, Mugil cephalus and Chelon haematocheilus were the most abundant (77.5% and 76.4% for total number of individuals and biomass, respectively). Benthic fishes such as Pleuronectus yokohamae and Paralichthys olivaceus were collected in almost all seasons but were low in abundance (5.3% and 4.1% for total number of individuals and biomass, respectively). Seasonal migrants were plentiful; specifically, Seriola quinqueradiata was abundant in November while Konosirus punctaus was common in July. Seasonal migrants of small-sized fish have been known to be abundant in the coastal water of western Korea including the study area, but few fish less than 100 mm were collected due to the large mesh size (30 mm) of the net used.

• 한국발생생물학회지:발생과생식
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• 제18권3호
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• pp.167-172
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• 2014

In the present study, muscle tissues were obtained separately from individuals from Atlantic hairtail population (AHP), Gunsan hairtail population (GHP) and Chinese hairtail population (CHP), respectively. The seven decamer primers were used to generate the shared loci, specific, unique shared loci to each population and shared loci by the three hairtail populations. Here, averagely, a decamer primer generated 64.7 amplified products per primer in the AHP population, 55.7 in GHP population and 56.4 in CHP population. The number of unique shared loci to each population and number of shared loci by the three populations generated by genetic analysis using 7 decamer primers in AHP, GHP and CHP population. 119 unique shared loci to each population, with an average of 17 per primer, were observed in the AHP population, and 28 loci, with an average of 4 per primer, were observed in the CHP population. The hierarchical dendrogram point out three main branches: cluster 1 (ATLANTIC 01 ~ ATLANTIC 07), cluster 2 (GUNSAN 08 ~ GUNSAN 14) and cluster 3 (CHINESE 15 ~ CHINESE 21). The shortest genetic distance displaying significant molecular difference was between individuals' CHINESE no. 16 and CHINESE no. 18 (0.045). In the long run, individual no. 01 of the AHP population was most distantly related to CHINESE no. 19 (genetic distance = 0.430). Consequently, PCR analysis generated on the genetic data displayed that the geographic AHP population was widely separated from CHP population, while individuals of CHP population were fairly closely related to those of GHP population.

• 수산해양기술연구
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• 제42권3호
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• pp.158-168
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• 2006

A study on the species composition and seasonal variations of fishery creatures caught by a funnel net was carried out in the coastal water off Dolsan Island, Yeosu from 2002 to 2003. During the study period, a total of 23 fishery creatures species were caught. Seabream(Acanthopagrus schlegeli), sea bass(Lateolabrax japonicus), mullet(Mugil cephalus), puffer(Takifugu niphobles) and rockfish(Sebastes inermis) predominated. These five species accounted for 85.1% of the total number of fishery creatures caught. Seasonal peaks of number of species occurred in summer, while those of number of individuals occurred in autumn. The lowest number of species and individuals were observed in winter. The large annual variation of diversity indices were observed from May to August. These large annual variation of diversity indices were mainly due to predominance of seabream, sea bass and mullet which accounted for most of all fishery creatures caught. The seasonal variations of fishery creatures showed that sea bass and mullet were caught mainly from spring to summer, seabream and puffer were caught mainly in autumn, and rockfish and brotula(Hoplobrotula armata) were caught mainly in winter.