여수 연안 정치망 어장의 주변 해역을 중심으로 1990년 4월부터 11월까지 매월 채집해서 분석한 식물플랑크톤의 분포량과 여수수협 위판장으로부터 구한 어획량 자료등을 이용하여 여수 연안 정치망 어장의 환경요인인 식물플랑크톤의 분포량과 어획량 변동과의 관계를 분석 정리한 결과를 요약하면 다음과 같다. 1) 식물성 플랑크톤의 출현량은 춘계와 추계보다 하계에 최대가 되고, 특히 육수의 유입이 많은 여수만 중 돌산연안 수역 분포량이 많고, 소리도와 세존도부근의 식물성 플랑크톤 분포량은 내만수의 확장 경향을 추정하는데 유익하게 이용될 수 있다. 2) 여수 연안 정치망에 어획되는 주요 어종의 어획량은 삼치, 갈치, 고등어, 정어리, 멸치, 전갱이 및 방어의 순이고, 어획되는 시기는 정어리와 멸치가 4~6월, 전갱이, 갈치 및 고등어는 6~10월이 였으며, 삼치는 전 어기에 걸쳐 어획되었다. 3) 여수 연안 정치망 어장의 어획량은 식물성 플랑크톤 출현량과 상관 관계가 있고, 이들 식물성 플랑크톤량은 하계 육수의 영향을 많이 받는 내만수에 최대의 출현량을 보인다. 또, 이 어장의 어획량은 하계에 많으므로 여수 연안 정치망 어장은 육수의 유입에 의해 풍부한 영양염류를 공급받는 내만수내의 이료생물의 생산력이 어획량을 좌우하는 어장의 중요한 환경요인이 될 수 있다
컴퓨터와 자동감지장치를 이용하여 먹바퀴 성충 암컷의 행동을 사육상에서 10~15일간 연속 관찰하였다. 대체적으로 12L~12D의 광조건하에서 각 미소서식처에서의 출현율과 활동성에는 개체의 변이가 컸고 일주기성이 낮게 나타났다. 먹이, 물 타개체가 공급되었을 경우 휴식처, 타개체, 먹이 및 물이 있는 것에서 각각 하루 평균 20.42, 11.50, 6.31, 2.66% 출현했다. 먹이, 물 타개체를 공급하지 않았을 경우 휴식처에서 하루중 20.29% 출현하였다. 출현 시간당 방문 횟수는 다른 미소서식처에서보다 먹이 먹는 곳과 물 마시는 곳에서 많았고 먹바퀴의 활동성은 먹이, 물, 타개체를 공급했을 때가 공급하지 않았을 때 보다 높았다. 미소서식처 출현에 대한 Principal Component Analysis (PCA) 결과 각 개체들의 출현 양상은 다양하게 나타났으나 (Q모드), 각 시간대는 명, 암기로 유형화 되어 나타났다(R모드). 먹이, 물, 타개체 공급시 휴식처에서의 출현이 먹이를 먹는 곳과 물을 마시는 곳에서의 출현보다 명, 암기의 유형성이 강하게 나타났다. 각 미소서식처에서의 출현율과 활동을 종합적으로 고려하여 PCA한 결과 먹바퀴의 활동은 먹이 및 타개체가 있는 것의 출현율과 관련 되었다.
This experiments was carried out to evaluate the potential winter hardiness of tall fescue varieties based on the data of dry weight of plant per relative tiller appearance rates(DW/RTAR) in mountainous pastures of Taekwalyon area. The results obtained we
To study the abundances of ichthyoplankton in the Nakdong River estuary, ichthyoplankton were sampled with standard net at approximately one month intervals from February, 1987 to January, 1988. Temperature and salinity in the study area showed large seasonal fluctuations due to the inflow of Nakdong River. Among 8 taxa of pelagic eggs occured in the study area, Sillago spp. occupied 37.3% of the total eggs; Coilia spp., 35.8%; Repomucenus spp., 13.7%; Engraulis japonica, 9.4%. These 4 taxa occupied 96.4% of the total eggs. Among 26 taxa of fish larvae, Engraulis japonica was the most abundant species and occupied 36.8% of the total larvae; Gobiidae, 15.3%; Repomucenus spp., 15.0%; Coilia spp., 14.0%; Hexagrammos otakii, 6.8%; Omobranchus elegans, 4.4%. These 6 taxa occupied 92.3% of the total larvae, The densities of pelagic eggs were more than 100 eggs/ 1,000m super(3) from May to October. The densities of larvae were 3.8~221.3 larvae/1,000m super(3). They were relatively high in May, July, and August.
This study aims to analyze the change of onset and end dates of extreme temperature events and examine their relationships with global warming. The data used for this study are daily maximum temperature, daily minimum temperature, and global mean temperature anomaly. Results were similar to the trend of global temperature, showing that the onset date of extreme high temperature is advanced while the end date of extreme high temperature is delayed. Also, the change of onset (end) dates of extreme low temperature were clear, with coming later (earlier). There is more distinct change in extreme low temperature than extreme high temperature. The length between onset date and end date of extreme high (low) temperature is significantly longer (shorter). The onset (end) date of extreme high temperature has a negative (positive) relationship with global mean temperature. The onset (end) date of extreme low temperature has a positive (negative) relationship with global mean temperature. It might be concluded that the change of onset and end date of extreme temperature in South Korea has been affected by global warming.
Background : Zingiber officinale is known as the source of the pungent, aromatic spice called ginger. Ginger, especially dried rhizomes, has been widely used for many medicinal purposes. The pungent principles in ginger are the non-volatile phenolic compounds gingerol, gingeridione and shogaol. It is cultivated 1,046 ha as 5 th of 55 medicinal crops in Korea (2016). Ginger has been successfully propagated using internodal cuttings. Ginger emergences at 18℃ or higher, and it takes about 40 - 50 days to emerges after sowing. Therefore, it is required a cultivation method that promote the emergence.
Methods and Results : The internodal cuttings with 25 – 35 g was planted on 30 April at 30 × 30 ㎝ on 120 ㎝ broad bed. Five covering materials included the illite non-woven fabric (18 g/㎡), rice straw and vinyl were treated to promote emergence and early growth. Soil temperature covered by illite non-woven fabric was higher by 2.6 - 2.8℃ than that of rice straw covering, and lower by 2.2 - 2.4℃ than that of the transparent vinyl mulching. Emergence was faster in the illite non-woven fabric mulching by 5 - 6 days compared to vinyl mulching. It was presumed to be due to the small diurnal difference with increasing soil temperature. The covering with illite non-woven fabric had a large plant height and a large leaf number. So, the early growth in the covering of illite non-woven fabric was better than other treatments. There was a differences in rhizome’s yield among treatments. The content of gingerol was 2.29 – 2.37 ㎎/g and there was no significant difference.
Conclusion : From the above results, covering illite non-woven fabric until sprouting after planting promoted its emergence and early growth.
Bošković (2004) argued that a quantifier cannot float in θ-positions in English, German and other several languages. In this paper, I strengthen this generalization by offering an independent set of arguments from Korean and Japanese. It will be shown that floating numeral quantifiers in these languages pattern precisely like the quantifiers in other languages, so that they only occur in non-θ-positions. Notwithstanding these gratifying results, several gaps in the generalization remain to be explained. In this paper, I argue that these and other related questions are adequately resolvable under the DP Split Hypothesis, proposed by Takahashi and Hulsey 2008 (see Sportiche 2005 for a similar argument), the essence of which is that A-moved subjects need not have a full set of DP in θ-positions. More specifically, an FQ cannot occur in θ-positions because there is no complete DP to which it can be merged in θ-positions. It can only occur in non-θ-positions when a full-fledged DP is available.