• Fisheries and Aquatic Sciences
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• 제20권1호
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• pp.1.1-1.7
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• 2017

A survey was conducted to investigate the presence of epiphytic organisms in four kelp Saccharina japonica farms in the coastal area of Korea from 2014 to 2015. Of 740 kelp samples that were taken, 208 exhibited six kinds of epiphytic organisms, including hydroid (detection rate: 11.6%), bryozoan (6.4%), polychaete (3.4%), algae (3.2%), caprellid (3%), and oyster (0.5%). The infestation rate for hydroid, bryozoan, and polychaete was significantly higher in the Wando farm, Busan farm, and Pohang farm, respectively. Epiphytic organisms were generally observed during May to September and not January to April, indicating that their infestation was significantly higher when the water had a higher temperature. The histopathogical examination revealed that hydroid and bryozoan organisms were attached on the cuticula of the thallus while some algae were attached on the cuticula of the thallus or had penetrated the epidermis. These results indicate that hydroid and bryozoan were the most predominant epiphytic organisms in Korean kelp farms, even though the infested thallus had not been broken.

• 수산해양교육연구
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• 제22권1호
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• pp.79-90
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• 2010

This study referred to relevant literatures, collected professional advice, created the sphere of duty with considering the characteristics of marine products-marine transportation education and teachers' specialty, and researched the feasibility of duty sphere classified from 2nd of September in 2008 to 20th of October in 2008 by selecting 80 professional teachers at random teachers who were working in 4 schools that had local 1. As the result of this study, it is proper to classify the sphere of marine products-marine transportation professional teachers into teaching-learning sphere, actual training guidance sphere, life guidance sphere, class management sphere, administrative performance sphere, specialty extension sphere, academic-industrial cooperation and community connection sphere. 2. For the contents of each sphere of marine products-marine transportation teachers' duty, it is proper to systematize teaching-learning field with 32 contents of duty, actual training guidance field with 21 contents of duty, life guidance sphere with 18 contents of duty, class management sphere with 12 contents of duty, administrative performance sphere with 18 contents of duty, specialty extension sphere with 15 contents of duty, academic-industrial cooperation and community connection sphere with 9 contents of duty respectively.

• 농촌의학ㆍ지역보건
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• 제17권2호
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• pp.103-111
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• 1992

In order to estimate the level of illness and the pattern of 2 week - prevalence of morbidity by demographic and socioeconomic factors among the inhabitants in Wando district which is located off the southern seashore from mainland Korea, the household interview survey was performed to the sample population selected by stratified proportional random sampling method from January 15 to 30, 1990 in Wan-do Gun, Chonnam province. The data were collected from 5,134 family members of 1,234 households which were 5.2% of total households of the area. The results observed were following: 1. The 2 week-prevalence was 12.1%. 2. There was no significant difference of 2 week-prevalence between male and female, and that was higher in lower income group and longer duration of residence group and larger number of household group.

• 한국유기농업학회지
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• 제19권spc호
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• pp.210-213
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• 2011

In this study, growth of pepper seedlings was tested by treating organic materials in a plastic green house in Ssangok-ri Dogok-myeon, Hwasun-gun, Jeollanam Province from February 3, 2010 to April 19, 2010. The raised seedlings were planted to the organic planting area with an interval of $70cm{\times}55cm$ on April 20 in Deogam-ri Gogeum-myeon Wando-gun and red peppers were harvested at 7 times from July 22 to September 29. Before planting, the plant length of the overgrowth of seedlings was reduced by 26.8% using plant powder treatment as compared to the control group. The red pepper yield was 27% higher than in the control group when 20g of bone ash powder and 20g of plant powder were mixed. The yield tended to increase in other treatments compared to the control group.

• 한국어병학회지
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• 제25권3호
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• pp.243-247
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• 2012

2009년 1월 6일경 어청도~고군산군도 사이에서 채낚기로 어획되어 군산수협 위판장에서 입수한 홍가자미의 피부 유두종을 병리조직학적으로 검사한 결과 저서성 어류에 발생되고 있는 상피성 유두종으로 종양의 내부는 특징적인 x-cell로 구성되어 있었다. 그러나 x-cell의 핵내의 특징인 대형의 핵인은 시료채취 후의 자가 분해에 의한 탓인지 관찰할 수 없었다.

• Journal of the korean society of oceanography
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• 제37권4호
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• pp.212-223
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• 2002

Cochlodinium polykrikoides bloom in 1995 was studied with a focus on an unusual coastal environment in the South Sea of Korea. Data on temperature, salinity, and zooplankton biomass during 1965-1998 and nutrients during 1990-1998 and chlorophyll-a during 1995-1998 were used in this study. These data were obtained from the serial oceanographic observations in Korean waters carried out by the National Fisheries Research and Development Institute. In 1995 the C. polykrikoides bloom began in the coastal area around Narodo Island in August and consequently occurred to the whole coastal area of the South and East Seas of Korea. During June-October 1995, the coastal environment was unusual compared with the long-term means during 1965-1998. In June 1995, sea surface temperature was 1-2$^{\circ}C$ warmer than in other years in all coastal areas, while salinity was high only to the east of Jeju Island. In August 1995, a strong coastal front appeared inshore of a line between Jeju and Tsushima Islands. In particular, a strong coastal front which showed the characteristics of upwelling front occurred in the coastal area around Narodo and Sorido Islands, not only because of a strong intrusion of the Tsushima Warm Current but also because of the upwelling of cold bottom water. Salinity was low in the neighboring waters of western side of Jeju Island. Nutrients and chlorophyll-a were high in the inshore area between Narodo and Sorido Islands in 1995 in contrast with the other years and areas. Zooplankton showed an unusually high abundance in the coastal area in October 1995. We conclude that the Tsushima Warm Current strongly influenced the South Sea of Korea in 1995 and created strong upwelling front bordering cold upwelled water in the coastal area around Narodo and Sorido Islands. It leads us that these physical structures introduce the favorable environment for the development of C. polykrikoides blooms. We suggest that C. polykrikoides has a bio-physical tolerance of high shear and stress and prefers frontal and upwelling relaxed areas as its habitat. We also find that nutrients were not supplied to the coastal area from the offshore where a low salinity water mass with high nutrients appeared around Jeju Island. Because the strong upwelling front protect the reach of offshore low saline water mass. The main source of nutrients was the upwelled water mass in the coastal area of Wando-Narodo-Sorido.

• 한국환경생태학회지
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• 제26권3호
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• pp.406-411
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• 2012

완도지역의 대표적인 상록활엽수림인 붉가시나무림, 낙엽성 참나무류림인 상수리나무림, 인공림인 약 30년생 리기다소나무림 등 3개 유형 임상의 구조 및 동태를 파악하기 위하여 임상별로 10개 조사구를 설정하여 산림개황, 중요치, 종다양성, 직경분포 등을 조사분석하였다. 붉가시나무림, 상수리나무림, 리기다소나무림의 교목층 밀도는 각각 2,250본/ha, 760본/ha, 1,560본/ha이었으며, 평균흉고직경은 각각 12.1cm, 14.3cm, 14.1cm이었다. 교목층과 아교목층 흉고단면적의 합은 붉가시나무림이 $37.1m^2/ha$, 상수리나무림이 $19.0m^2/ha$, 리기다소나무림이 $29.2m^2/ha$이었다. 중요치를 분석한 결과 동백나무는 붉가시나무림, 상수리나무림, 리기다소나무림의 아교목층과 관목층에서 모두 제1의 우점종이었다. 임분 전체의 종다양도는 붉가시나무림이 0.814, 상수리나무림이 0.956, 리기다소나무림이 0.866이었다. 붉가시나무림의 임분 전체 종다양도가 비교적 낮은 것은 출현종수는 비슷하였으나 균재도가 낮기 때문이었다. 붉가시나무림은 붉가시나무-동백나무 복층림이 지속될 것으로 추정되었다. 상수리나무림은 동백나무 우점군집으로 천이가 진행될 것으로 추정되었으며, 리기다소나무림은 붉가시나무-동백나무 복층림으로 천이가 진행될 것으로 추정되었다.

• The Korean Journal of Ecology
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• 제16권4호
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• pp.501-514
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• 1993

한반도 남부 지역에 분포하는 아까시나무(Robinia pseudo-acacia L.) 종자의 생태학적 형질 변이를 추적하기 위하여, 북위34$^{\circ}$18'~38$^{\circ}$36'사이에 위치한 15재역 (대진, 속초, 강릉, 수락산, 홍천, 광릉, 남한산성, 충주, 예산, 안동, 전주, 달성, 창원, 목포, 완도)을 선정하여 채종한 종자를 재료로, 발아 및 유식물 생장 실험을 실시하였다. 지역에 따른 발아 최적 온도는 저위도로 갈수록 높아지는 경향을 보여, 25$^{\circ}C$를 최적 온도로 하는 중북부형(대진, 속초, 강릉, 수락산, 홍천, 광릉)과 30$^{\circ}C$가 최적 온도인 중 남부형 (남한산성, 충주, 예산, 안동, 전주), 그리고 35$^{\circ}C$를 최적온도로 하는 남부형(달 성, 창원, 목포, 완도)의 3가지 유형이 식별되었다. 유식물의 신장 생장과 건량 새？에 대한 최적 온도는 모든 지역에서 25$^{\circ}C$로 나타났으나, 온도에 따른 생장 서열에 있어서 는 발아 경향과 유사한 경향을 보여 남부형(달성, 창원, 목포, 완도), 중남부형(남한산 성, 충주, 예산, 안동, 전주) 및 중북부형(대진, 속초, 강릉, 수락산, 홍천, 광릉)의 3가 지 유형이 식별되었다.

• 수산해양기술연구
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• 제36권3호
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• pp.210-221
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• 2000

완도연안의 비단가리비 개체군을 대상으로 자원생태학적 특성을 규명하기 위해 1998년 11월부터 1999년 10월까지 서식환경 및 밀도조사를 하였고, 패각에 나타난 윤문을 이용하여 연령과 성장을 구명하고, 생식소 난성숙비, 숙도지수의 변화, 포란수 측정 등으로부터 성숙과 산란에 대하여 조사하였다. 1. 수온 및 비중의 범위는 7.6∼25.9$^{\circ}C$, 1.0188∼l.0260였고 DO와 pH는 각각 6.48∼9.50ppm, 8.17∼8.80의 범위였다. 2. 저질상태에 따른 서식밀도는 암반과 자갈에서 28.83 마리/100㎡의 가장 높은 서식밀도를 보였고, 전체의 82,4%가 서식하였다. 3. 각장 (SL)과 각고 (SH)와의 관계는 SH=1.021SL+2.211 (R$^2$= 0.989), 각장과 전중량(TW)의 관계는 TW=$0.0003SL^{2.837}$ (R$^2$= 0.980)였다. 4. von Bertalanffy 성장식의 매개변수 추정치를 보면 이론적 최대각고($SH_{\infty}$)는 117.4mm, 성장계수 (K)는 0.612/yr, 각고가 0일 때의 이론적인 연령 ($t_{0}$)는 -0.017세였다. 5. 50% 군성숙연령은 0.21세로 이 때의 군성숙 각고는 18.3mm였다. 산란기는 6∼7월과 10월 연 2회 추정되었으며, 포란수 (Fc)에 대한 각장 (SL) 및 생식소중량 (GW)의 관계는 Fc = $697.03SL^{2.683}$ (R$^2$= 0.984), Fc =10,076,090GW + 15,608,781 (R$^2$= 0.990)로 나타났다.

• 식물병연구
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• 제17권3호
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• pp.351-357
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• 2011

전남지역에서 벼 줄무늬잎마름병에 대한 연구를 2008년부터 2011년까지 4년간 수행하였다. 전남지역 벼에서 벼 줄무늬잎마름병 발생은 서남해안지역인 진도, 완도, 신안, 해남, 무안에서 2008년부터 2009년까지 피해가 심하였으나, 2010년은 거의 피해가 없었다. 월동 애멸구의 벼 줄무늬잎마름바이러스 보독율은 2008년부터 2011년까지 연도별로 각각 4.7%, 11.3%, 8.7%, 12.8%이었으며, 진도, 완도, 신안 등 서남해안 지역에서 보독충율이 높게 나타났다. 동력흡충기를 이용한 논에서 $m^2$ 당 월동 애멸구 밀도는 3월에 높았고, 4월에는 낮아지는 경향이었으며 이는 4월에 경운에 의해 밀도가 낮아지는 것으로 추정되었다. 논에서 애멸구 $m^2$당 평균밀도는 3년동안 7.7, 5.4, 4.0마리였다.