• Korean Journal of Ichthyology
• /
• v.17 no.3
• /
• pp.187-194
• /
• 2005

Feeding of the maiden goby, Pterogobius virgo and multicolorfin rainbowfish, Halichoeres poecilopterus, was studied at Kurahashi Island in the Seto Inland Sea, Japan. P. virgo foraged on only benthic invertebrates in a pit on the bottom by spot-fixed fin digging. Territory size of P. virgo was very small, because they only defended the excavated pit. H. poecilopterus frequently intruded into the feeding territory of P. virgo and fed on benthic invertebrates flushed out by the fin digging of P. virgo. Feeding activity and vigilance time of P. virgo tended to decrease significantly more in such an association than when solitary. Frequency of aggression of P. virgo when H.poecilopterus intruded into the territory was higher the intruder came from the front of the territory than when the invasion was from the side and back, regardless of the size of the intruder. In small H.poecilopterus, feeding success rate was greater from the side and back of the territory than from the front. However, similar-sized H.poecilopterus were more successful in feeding from the front and side. Feeding association provides an antipredatory benefit to P. virgo because of less alert time against predators and earlier detection of predators, although their cost is great because of territory defense and decrease of feeding activity.

• Journal of the Korean association of regional geographers
• /
• v.3 no.1
• /
• pp.13-34
• /
• 1997

The impact of a central place on daily living over wide outlying territory has been one of traditional subjects in the field of urban geography. The flow of rural population toward the central city of Chinju characterizes the population movement in Western Kyungnam, where the spillover of urban population into outlying areas, an especially prominent phenomenon in American society, does not occur. The central city of Chinju is supposed to be the most favored settlement area in Western Kyungnam. More than two thousands of teachers. who live in Chinju, cross the city boundary each morning to do their jobs in Western Kyungnam. But only ninety teachers living outside Chinju commute to the workplace in the city. The teachers willingly spend hours commuting each day to enjoy better quality of life in the central city. In fact, the central city of Chinju functions as bedroom communities for many middle-class workers in Western Kyungnam. On the basis of teachers' commuting behavior, four levels of Chinju's urban spheres are identified in Western Kyungnam. As Table-6 and Figure-2 show, the first-order level of Chinju's sphere includes most Myuns of Sanchung/Hadong Guns and some Myuns of Sachun/Gosung Guns. The second-order level comprises Sanchung/Sachun Eubs and many Myuns of Sachun /Gosung Guns. The third-order level is made up of Samchunpo, Hadong/Gosung/Eryung/Namhae/Habchun/Hamyang Eups, and many Myuns of Eryung/Namhae/Habchun Guns. And all of Guchang Gun and most Myuns of Hamyang Gun belong to the fourth-order level of Chinju's sphere. The influence sphere of Metropolitan Chinju is extended farther in the direction of less competition with other metropolises. Such a situation occurs to the west and south of Chinju. Daily commuting, defined as the journeys to and from work, is an excellent indicator for delimiting urban spheres of influence.

• Korean Journal of Ichthyology
• /
• v.11 no.1
• /
• pp.42-45
• /
• 1999

Reproductive behavior of wrasse, Cheilinus bimaculatus, was studied in a shallow waters at Makurazaki in Kagoshima, southern Japan. Mating system of C. bimaculatus was haremic. Males established mating territory around the prominent rocks or a thicket of soft corals. Within the territory, there were two or three females. And pair-spawned with a female between 15:00 h~15:30. One spawning was performed within six seconds. The streaking, sneaking and group spawning were not observed in our observation.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.32 no.1D
• /
• pp.61-69
• /
• 2012

The purpose of this study is to draw the development direction of subway adjacent area by distance through an analysis on influence factors of land value by urban spatial constitution. The method of this study is analyzing influence factors of land value by the distance of subway adjacent area by using regression analysis method with urban spatial constitution variables from advanced research and drew the difference and extent of land value influence factors by distance of subway adjacent area. The result of analyzed the influence factors of land value by distance to draw the purpose of this study, which is the direction of development by distance of subway adjacent area, the connected area has shown the development direction as high density development centrally on commercial and improvement of accessibility and decrepit status, the directly influence area shows as complexity with high density centrally on commercial and business and lastly, the in directly influence area has shown the development direction as complexity of residential and commercial, improvement of accessibility and decrepit status. This study has used land value as a dependent variable to verify the speculation of this study based on the contents, the results of the analyze and the critical points of precedent studies to draw the development direction of subway adjacent influence area by using autonomous variables from advanced research. Upon this, drew a conclusion of this study as analyze of influence factors of land value could be a reference material for development of subway adjacent area.

• Korean Journal of Environment and Ecology
• /
• v.26 no.2
• /
• pp.186-191
• /
• 2012

The Chinese Sparrowhawk($Accipiter$ $soloensis$) is the most common breeding raptor in Korea, but its spatial use in the breeding season has been poorly documented. Therefore, to estimate the territory and home range sizes of breeding sparrowhawks, six territorial males(four in 2005 and two in 2006) were observed from June to July in Gyeonggi Province, the Republic of Korea. Main perches, which were used repeatedly(more than three times) or where apparent territorial behaviors were observed, were identified and the locations were analyzed by GIS software. According to the 100% Minimum Convex Polygons which were identified from $25.2{\pm}5.3$ perches, Chinese Sparrowhawks occupied $4.62{\pm}0.90$ ha for breeding territories and used $22.57{\pm}5.12$ ha for their home ranges. These estimates showed larger spatially occupied areas than those in one previous report, but this study suggests that Chinese Sparrowhawks intensively use small areas throughout the breeding season. This result also implies that the sparrowhawks have the potential to be significantly affected by any habitat changes and resource exploitation in the small areas(particularly in small rice paddies of 0.6-2.0 ha) which they largely rely on for food. Although this study was based on observations solely for territory size estimations, this study may be worthwhile as preliminary pilot research for Chinese Sparrowhawk conservation, management, and further studies.

• Korean Journal of Ichthyology
• /
• v.5 no.2
• /
• pp.208-216
• /
• 1993

The territorial behavior of the naked goby, Gobiosoma bosci, was observed in 80-liter aquaria. Social behavior was observed for an extended time in daily observation periods. Individuals of G. bosci, regardless of size and sex, exhibited agonistic behavior. The aggresive behaviors of approaching, threatening, attacking, and fighting were recorded as agonistic behavior. All individuals are capable of changing their color and camouflaging themselves by matching the color of bottom. Especially, the resident and the intruder are of the same size, the fighting duration was prolonged and the variability of coloration was at its peak.

• Journal of the Korean association of regional geographers
• /
• v.12 no.6
• /
• pp.656-670
• /
• 2006

In Gcochang-Gun, the population decrease, due to a rural exodus phenomenon, has led to the absolute decline in the numbers of both primary and secondary schools and students. However, the high schools in Geochang-Gun show an unusual characteristic that the students from other areas outside Geochang-Gun cover about 25% of the total students studying in Geochang-Gun. This is quite contrary to the contention that one of the major factors hindering the development of rural areas is generally the inferior condition of education. In this context, this paper aims to explore the spatio-temporal changes in the sphere of influence of the secondary education with special reference to Geochang-Gun, Gyeongnam. Most importantly Geochang High School and Geochang Daesung High School account for over 98% of the students coming from other areas outside Geochang-Gun's cross-border counties. This means that the sphere of influence of the Geochang's secondary education is dependent largely upon the two private academic high schools.

• 베이커리
• /
• no.8 s.349
• /
• pp.57-60
• /
• 1997

• Proceedings of the Zoological Society Korea Conference
• /
• 2001.10a
• /
• pp.133.1-133
• /
• 2001

• The Korean Journal of Ecology
• /
• v.19 no.4
• /
• pp.353-353
• /
• 1996

이 연구는 1988년 5월 초순부터 6월 중순까지 일본 북해도 대학 토마코마이 연습림에서 산림시업에 의한 산림구조가 다른 두 지역에서 산림환경구조와 번식조류군집과의 관계를 밝히기 위하여 이루어졌다. 조사지간의 차이를 밝히기 위한 정량적인 서식지분석과 조류군집을 평가하기 위한 세력권 도시법과 길드분석을 하였다. 우점수종은 신갈나무, 일본목련, 산벚나무, 고로쇠나무 등이었다. 임층의 피도는 상중층은 비간벌지가, 하층은 간벌지가 높았다. 조사지에서 34종의 조류가 관찰되었고 21종이 세력권을 확보하였다. 황금새, 산솔새, 박새, 섬참새, 동고비, 쇠박새가 우점종이었다. 조사지간에 번식조류의 종수는 동일하였으나 조류군집구성은 달랐다. 수동영소길드 조류 종수와 쌍수는 비간벌지에 많았으나, 지면영소길드 조류는 간벌지에서 많았다. 그리구 수관층영소길드는 조사지간에 유의한 차이가 없었다. 그러므로 적정한 간벌과 같은 산림시업은 모든 산림조류에 부적당한 것이 아니고 관목, 지면 영소길드와 나무와 관목, 지면채이길드에 유리한 것으로 생각되었다. 또 산림시업이 수동과 수관영소길드에 큰 영향을 미치지 않았다.