• Title/Summary/Keyword: 포획-재포획법

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Damage Reduction Effect and Attracted Distance by Aggregation Pheromone Trap of the Bean Bug, Riptortus pedestris (Fabricius), (Hemiptera: Alydidae) in Soybean Fields (콩 포장에서 집합페로몬 트랩을 이용한 톱다리개미허리노린재 (Riptortus pedestris) 유인거리 및 피해 경감 효과)

  • Park, Chang Gyu;Yum, Ki Hong;Jung, Jin Kyo
    • Korean journal of applied entomology
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    • v.51 no.4
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    • pp.411-419
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    • 2012
  • The lure-distance of Riptortus pedestris aggregation pheromone was elucidated and the damage mitigation effect by mass trapping of R. pedestris was examined in commercial soybean fields. The recaptured ratio showed that 76.1% of total recaptured individuals were lured within 40 m and 89.0% of total recaptured adults were arrested in the lower 80 m. There is not much difference in the number of recaptured individuals according to the location of installed traps in the experiment. There was linear correlation between the total installed number of traps and the total number of trapped individuals in commercial soybean fields. and the highest yield (261.8 g/10 stems) was investigated in the field that had installed a pheromone trap per $770m^2$. No relationship wasf found between the covered areas of a pheromone trap for mass trapping and yield loss. The ratio of type A seed (healthy) was higher in the field that installed a trap per $385m^2$ and $770m^2$ (around 62%) and type B seed (showing distinct injury marks) was lower in the same fields (around 27%). From this result, we could reduce slightly the damage of soybean seeds by the mass trapping of Riptortus pedestris adults with an aggregation pheromone trap per $385{\sim}770m^2$ area range.

Differences in Small Mammal Populations Due to Different Habitat Structure in Natural Deciduous Forest (활엽수(闊葉樹) 천연림(天然林) 지역(地域)에서 서식지(棲息地) 구조(構造)에 따른 소형(小型) 포유류(哺乳類) 개체군(個體群)의 차이(差異))

  • Rhim, Shin-Jae;Lee, Woo-Shin
    • Journal of Korean Society of Forest Science
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    • v.88 no.2
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    • pp.179-184
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    • 1999
  • This study was conducted to clarify the differences in small mammal populations due to habitat structure caused by different forest practices within natural deciduous forests at National Forest, Pyoungchang, Kangwon Province, Korea from May to November, 1996. Three sites, 1ha each, were selected as cutting, thinning, and control for live trapping of small mammals. Total captures of small mammals in all sites were combined Apodemus peninsulae(45.1%, n=64) and Eothenomys regulus(54.9%, n=78). A. peninsulae was captured in the cutting and the control site. And E. regulus was captured in the thinning and the control site. The number of captured small mammals in a month were the highest in the control site and the lowest in the cutting site. A. peninsulae's mean body weight of adult individuals was more higher in the control site than in the cutting site. And E. regulus's mean body weight of adult individuals was more higher in the control site than in the thinning site. Habitat structure seems to be an important factor in abundance and species composition of small mammals.

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Distribution and Population Dynamics of Korean Endangered Species; Hipparchia autonoe (Lepidoptera: Nymphalidae) on Mt. Hallasan, Jeju Island, Korea (한국산 멸종위기종 산굴뚝나비(나비목, 네발나비과)의 분포와 개체군 동태)

  • Kim, Do-Sung;Cho, Young-Bok;Kim, Dong-Soon;Lee, Yeong-Don;Park, Seong-Joon;Ahn, Nung-Ho
    • Korean Journal of Environment and Ecology
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    • v.28 no.5
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    • pp.550-558
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    • 2014
  • This study was conducted to investigate the distribution and the population dynamics of Hipparchia autonoe by using a line transect and Mark-Release-Recapture (MRR) at the Mt. Halla in Jeju Island. The results showed that H. autonoe was found from 1,500 m above the sea level. Total 1,493 H. autonoe with 978 males and 515 females were captured and released in the MRR study site. Among them, 518 individuals including 284 males and 234 females were recaptured. The average survival time was 2.31 days with 2.14 days for males and 3.47 days for females, indicating longer survival time in case of females than males. The daily population size of males estimated in the MRR study site was maintained about 1,000 individuals in July and gradually decreased less than 200 in August. The number of females showed peak at 335 individuals on July 24, and gradually decreased less than 120 in August. Thus, female population was 1/3 of males. The average travel distance of male and female H. autonoe were $116.8{\pm}191.9m$ and $118.4{\pm}161.5m$, respectively, indicating almost same between sexes. H. autonoe in the Mt. Halla formed single population group in the wide meadow around the Baekrokdam Lake. The highest population density of H. autonoe was occurred in the restored area from damages, where host plants such as the sheep's fescue or the food plant are abundant by artificial restoration efforts.

Metapopulation Dynamics of the Oriental Long-tailed Swallow Sericinus montela (Lepidoptera: Papilionidae) in Korea (한국산 꼬리명주나비의 메타개체군 동태)

  • Kim, Do-Sung;Kwon, Yong-Jung
    • Korean journal of applied entomology
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    • v.49 no.4
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    • pp.289-297
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    • 2010
  • The loss of natural habitats and their fragmentation caused by human activities pose a great threat to biodiversity worldwide, reducing animal population to small, fragmented patches of natural habitat. In this paper, a metapopulation dynamics of Sericinus montela koreanus, a species of butterfly, was studied for two years by mark-release-recapture (MRR) techiques in the Musimcheon, Cheongju Korea. 2,749 individuals (males: 2,295, females: 454) were marked and released, with 343 individuals (12.5%) recaptured during the MRR experiment. Capture sex ratio and recapture sex ratios was both consistently male-biased. The Jolly-Seber model was used to estimate daily metapopulation size, survival rates, addition rate, and accidental deaths. We urge conservation biologists to consider the local population dynamics of species for the management of metapopulations in fragmented landscapes. In the case of the S. montela koreanus, continuing site protection is essential.

Application of PIT Tag and Radio Telemetry Research Methods for the Effective Management of Reptiles in Korea National Parks (국립공원 내 파충류 자원의 효율적인 관리를 위한 PIT (passive integrated transponder) tag과 무선추적방법(radio telemetry)의 적용)

  • Lee, Jung-Hyun;Lee, Heon-Joo;Ra, Nam-Yong;Kim, Ja-Kyeong;Eom, Jun-Ho;Park, Dae-Sik
    • Korean Journal of Environmental Biology
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    • v.27 no.2
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    • pp.146-154
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    • 2009
  • To suggest effective ways of the management of reptiles in Korea national parks, we applied PIT (passive integrated transponder) tag and radio telemetry research methods in the monitoring of reptiles in Odaesan and Woraksan national parks. We implanted PIT tags into 137 snakes (six species) captured in both the national parks between March 2006 and October 2008 and also radio-tracked two Korean rat snakes (Elaphe schrenckii anomala) from September 2007 to November 2008 in the Woraksan national park. Of total 137 snakes which we had inserted the PIT tag, 17 snakes (12.40%) were recaptured. Based on the PIT tag data of the recapture, we successfully obtained the annual growth rate of Korean cat snakes (Elaphe dione) and Red-tongue pit-viper (Gloydius ussuriensis). Home range of the Korean rat snakes based on the data of radiotracking was estimated as 389,600$m^2$ (MCP: Minimum convex polygon) and 471,800$m^2$ (Kernel 95%) for males and 162,500$m^2$ and 208,700$m^2$ for females. These results suggest that if we apply PIT tag and radio telemetry research methods to manage reptiles in Korea national parks, it could greatly increase our understanding about their basic ecology and as the result, it could allow us to develop better management and conservation ways of reptiles in Korea national parks.

Population Size Estimation of the Kaloula borealis in the Daemyung Retarding Basin (대명유수지에 서식하는 맹꽁이 Kaloula borealis 개체군 크기 추정)

  • Choi, Seo-Young;Rho, Paikho
    • Korean Journal of Environment and Ecology
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    • v.30 no.4
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    • pp.684-693
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    • 2016
  • Daemyung retarding basin located near the confluence floodplain of the Nakdong and Kumho River is a large spawning site for the endangered Kaloula borealis, and needs for protecting the habitat of the endangered species are increasing. However, scientific studies are rarely conducted on the population characteristics and ecological knowledge on the species in the basin. This paper aims to estimate the population size and spatial distribution of the species that inhabited at the Daemyung retarding basin, using the capture-recapture method. Also, pitfall traps were installed in each habitat types classified with micro-topographic features, slope aspects, and vegetation communities to identify the spatial distribution characteristics of the Kaloula borealis of each habitat in the retarding basin. Field survey on the species was conducted from May 2013 to October 2014, showing that the species emerged in May, became more active during July and August and started to hibernate at the end of October. Using capture-recapture method, the first survey was carried out from July to August, 2014. Ninety-eight toads were captured, marked, and released back into the site. In the second survey, 68 toads including 5 marked toads of the previous survey were captured. Based on these two-sample surveys, around 535-2,131 individual toads are estimated to inhabit the Daemyung retarding basin. Fifty-seven pitfall traps were installed in four habitat types: mounded and vegetated flatland, lowland swamps, and slope areas of both the southern and western parts of the basin in order to delineate spatial abundance of the endangered Kaloula borealis during the rainy season when the species is actively spawning. Pitfall traps at the spatially explicit array indicated that the species gradually move to the slope areas near the Daemyung stream, showing high occurrence density of the Kaloula borealis compared to the lowland swamps after the spawning season. The emergence of Kaloula borealis in the lowland swamps appeared to be comparatively higher during the spawning season. However, after the spawning season the toads species rapidly moved into the neighboring land of relatively high elevation such as the slope area towards the Dalsung protected wetlands and Daemyung River. These results are closely related to the migration patterns that toads tend to return to the sheltering sites and/or hibernating grounds after the spawning season. Also, the Kaloula borealis moved to the nearest high-level vegetated areas as the lowland swamps of their spawning grounds deteriorated with the expansion of permanent ponds due to the rise in the groundwater level.

Population Estimates of the Endangered Species, Gobiobotia macrocephala (Pisces: Cyprinidae) in Seom River, Korea (섬강에 서식하는 멸종위기종 꾸구리 Gobiobotia macrocephala(Pisces: Cyprinidae)의 서식개체수 추정)

  • Ko, Myeong-Hun;Song, Ho-Bok;Choi, Seung-Ho;Song, Ha-Yoon;Kang, Dong-Won;Moon, Shin-Joo;Lee, Sang-Jun;Bang, In-Chul
    • Korean Journal of Ichthyology
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    • v.24 no.3
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    • pp.177-182
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    • 2012
  • Population sizes of an endangered species, Gobiobotia macrocephala (Cyprinidae, Gobioninae) were investigated in the Seom River, a tributary of the Han River drainage system, in Wonju-si, Gandgwon-do, Korea from September to October 2010. G. macrocephala occurred at 14 stations surveyed in this study and inhabited around the downstream riffles with pebble and coble bottoms. Its population sizes were estimated to be $8,295{\pm}4,922$ and $39,846{\pm}14,232$ individuals at two main stations using the mark-recapture method. The quadrat methods by a spoon net and snorkeling revealed that the population sizes were estimated to be 9,216 and 37,873 individuals, and 5,593 and 24,347 individuals, respectively.

Toe entrapment and injury by plastic color rings in a Pale Thrush (Turdus pallidus) and a Light-vented Bulbul (Pycnonotus sinensis) (플라스틱 유색가락지에 의한 흰배지빠귀(Turdus pallidus)와 검은이마직박구리(Pycnonotus sinensis)의 발가락 끼임과 부상)

  • Choi, Chang-Yong;Park, Chang-uk;Nam, Hyun-Young;Park, Se-Young;Bing, Gi-Chang;Cho, Sook-Young;Park, Jong-Gil
    • Korean Journal of Ornithology
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    • v.25 no.2
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    • pp.82-86
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    • 2018
  • Color rings have been commonly and widely used in many ecological and ornithological studies in the field, but color ring-induced injury in passerines is poorly documented. In this report, we describe the first case of toe loss caused by a dislocated split Darvic ring in a Pale Thrush (Turdus pallidus) that was recaptured 596 days after its initial capture and release on Hong-do Island, the Republic of Korea. We also found that a left hind toe of a Light-vented Bulbul (Pycnonotus sinensis) was entrapped by a split color ring when the bird was observed 135 days after the marking at Heuksan-do Island. Based on these two cases out of the 1,900 color ringed birds, we emphasize a precautionary approach following general guidelines in the application and use of color leg rings for future studies.

Efficiency of Yellow and White light Traps on Controlling Tobacco Whitefly in tomato Greenhouse (토마토 온실에서 담배가루이 성충에 대한 노란색 및 백색 트랩의 방제효과)

  • Lee, Jung-Sup;Lee, Jae-Han;Park, Kyung-Seob;Yeo, Kyung-Hwan;Kim, Jin-Hyun;Kweon, Jun-Kuk
    • Journal of Bio-Environment Control
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    • v.26 no.4
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    • pp.432-437
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    • 2017
  • Yellow sticky traps have been commonly used for monitoring tobacco whitefly populations in open-fields, as well as in greenhouses. However, the attractiveness depends on various factors such as the reflected intensity (brightness) and hues of yellow color (wavelength) of the trap surface, which is often influenced by environmental conditions and may sometimes affect tobacco whitefly capture. Therefore, the use of light-emitting traps can be a significant complementary tool to strengthen the attractiveness and selectivity of these traps. This research was carried out in tomato greenhouses to evaluate the light-emitting trap as potential attractants for Bemisia tabaci adults. The results showed that B. tabaci adults on average preferred (p>0.05) traps in yellow lights (590 nm) ($168{\pm}7.6adults/trap$) compared to traps in white lights ($106{\pm}4.6adults/trap$) and traps without lights ($60{\pm}4.8adults/trap$). The yellow light trap(590 nm) showed the most attractive to B. tabaci adults, followed by a little lower attraction to the white light trap(450-625 nm), whereas the control (no light trap) was little attractive to B. tabaci adults. These results suggested that yellow and white light traps could have a promising use in greenhouses for the identification, monitoring, and pest control tools of tobacco whiteflies.

Distribution Status and Estimation of Population Size of the Endangered Species, $Cobitis$ $choii$ (Pisces: Cobitidae) in Guem River, Korea (멸종위기어류 미호종개 $Cobitis$ $choii$ (Pisces: Cobitidae)의 분포양상 및 서식개체수 추정)

  • Ko, Myeong-Hun;Lee, Ill-Ro;Bang, In-Chul
    • Korean Journal of Ichthyology
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    • v.24 no.1
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    • pp.56-61
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    • 2012
  • The distribution status and population size of the endangered species, $Cobitis$ $choii$, were investigated in the Guem River, Korea. From 1984~2004, this species occurred at 20 survey stations; however, their numbers have but rapidly decreased in recent years (2006~2011), during which time they were only observed at six stations. The area of their habitat is narrow and occurs in primarily downstream, sandy zones. Using the mark-recapture method, populations were estimated at 9,106 and 34,717 individuals for the main habitats of Baekgok and Ji Stream, respectively.