• Title, Summary, Keyword: 채집

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Comparison of Insect Diversity in Relation to the Sampling Method, Time And Window (채집 방법과 시기 및 빈도에 따른 곤충의 다양성 비교)

  • Park, Geun-Ho;Cho, Soo-Won
    • Korean journal of applied entomology
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    • v.46 no.3
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    • pp.375-383
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    • 2007
  • To find out the affection of the sampling techniques to the result of a faunistic study, we surveyed the insect fauna of the Chungbuk National University (four different sites) for a year, from spring to fall. For each site, four different collecting methods: light trap, net sweeping, pitfall trap, and window trap, were applied and the collecting was done every other week for a total of 16 times. A total of 14 orders and 672 species were collected. 501 species were collected by the light trap, which covers about 75% of the total number of species, turn out to be the most effective, while other methods could only cover 18% or less. On average, only about 30% of the species collected at a given time of collecting were re-collected at the next collecting, which means about 70% of the species collected from the first collecting remains not collected in the next collecting if you collect insects every other week. The result suggests that, in addition to applying diverse collecting methods, frequent sampling, or narrow sample window, is another very important factor for a good representation of species diversity in an insect faunistic study.

유기 배 과수원의 생물 종 다양성 연구

  • Kim, Do-Ik;Kim, Seon-Gon;Go, Suk-Ju;Gang, Beom-Yong;Kim, Hong-Jae;Kim, Jong-Seon;Im, Gyeong-Ho
    • Proceedings of the Korean Society of Organic Agriculture Conference
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    • pp.290-290
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    • 2009
  • 유기 배 과수원의 생물종 다양성을 조사한 결과, 월동 직후 유기배 과수원에서는 13종 503마리, 관행 과수원에서 11종 145마리의 토양 미소동물이 채집되었다. 채집된 종류는 거미, 지네, 노래기와 곤충들이다. 유기과수원에는 특히 응애와 거미가 많이 채집되었으며 특히 곤충 중에서 톡토기는 247마리로 관행에 비해 7배가 많이 채집되었다. 또한 생태지수인 종다양도가 관행 1.383에 비해 1.589로 더 높았다. 서식지별 분포를 보면 나무 바로 밑의 개체수와 종수가 더 많아 배나무 뿌리를 중심으로 생활하고 있음을 확인하였다. 여름철 토양동물의 분포는 달팽이, 지렁이를 비롯한 미소 동물들이 유기인증 과수원에는 24종 632마리, 관행에서는 15종 340마리가 채집되어 유기인증 농가에서 월등히 많은 토양동물이 살고 있었으며 종다양도역시 유기농가 2.021로 관행인 1.652보다 높았다. 청목(1985)의 자연도 평가 A그룹종은 환경저항성이 낮아 쉽게 소멸되는 그룹으로 애지네, 노래기 땅지네 등이 여기에 속하는데 유기농가에서 개체수들이 더 많이 채집되었다. 추락트랩을 이용한 조사에서 딱정벌레 중 점박이먼지벌레가 관행 과수원에서 월등히 높았으며 유기농가에서는 큰넓적송장벌레가 채집되어 이들 종이 지표종으로 선발될 수 있을 것으로 보인다. 또한 거미류 중에 수풀오소리거미가 많이 채집되었으며 채찍늑대거미, 꼬마게거미, 점게거미등은 유기농가에서만 채집되어 추후 이들 종이 지표종으로 선발될 가능성이 있었다. 말레이트랩에서는 고치벌과 맵시벌 종류가 많이 채집되었고 파리류에서는 초파리가 많았으며 털검정파리는 유기인증 농가에서 만이 채집되었다. 유아등을 이용한 야간 곤충류를 채집한 결과 유기농가에서 16종 201마리, 관행 9종 42마리가 채집되어 야간에 활동하는 곤충류 역시 유기농가가 많았다. 추락트랩과 말레이트랩모두 유기인증 농가에서 종다양도가 관행보다 높았으며 유아등 채집에서도 마찬가지 결과를 보여 유기배 과수원이 토양 뿐 아니라 배를 중심으로 생활하는 모든 동물들의 종 다양성이 우수함을 알 수 있었다.

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배내천 중류의 저서성 대형무배유동물에 대한 연구 3. 4계절의 표류 수서곤충

  • 오용남;전태수
    • The Korean Journal of Ecology
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    • v.16 no.4
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    • pp.489-499
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    • 1993
  • Drifting aquatic insects were collected with using drift nets in the middle reaches of the Paenae stream. a tributary of the Naktong River in Korea, in four seasons from August 1989 to May 1990. During the study period, 6 orders and 31 families were collected. Drifted insects were the most diverse in autumn, while the number of collected individuals was the highest in spring. The abundant groups were the primary consumers such as Ephemeroptera and Diptera including Heptagenidae, Baetidae, and Chironomidae. The secondary consumers such as Plecoptera and Trichoptera, and the burrowers, Ephemeridae and Odonata were collected less than the primary consumers. Generally the first dominant species belonged to Ephemeroptera such as Pseudocloeotz sp., Heptagenia sp., and Baetis sp, In four seasons Ephemeroptera appeared more abundantly in drift(62%) than benthic samplings(33%). Diptera occurred similarly in drift and benthic samplings at 22%. Plecoptera and Trichoptera were collected at 4% and 11%, respectively, and appeared less than in benthic samplings. In functional groups collectors and scrapers were collected more than shredders and predators in drifts. In habit groups clingers and swimmers were present more than sprawlers and burrowers.

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Field records of Dr. Tchang-Bok Lee based on herbarium specimens deposited at SNUA (서울대학교 농업생명과학대학 수목원 수우(樹友)표본관(SNUA)에 소장된 채집표본을 근간으로 한 이창복교수의 채집기록)

  • Chang, Chin-Sung;Kim, Hui;Jeon, Jeong-Ill
    • Korean Journal of Plant Taxonomy
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    • v.33 no.4
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    • pp.455-472
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    • 2003
  • The period from 1946 until his retirement from Department of Forest Resources, Seoul National University was a time of research and professional activity on many fronts for Korean Plant Taxonomy. From 1952 to 1984, he travelled south Korea and collected more than 70,000 specimens. Working out of this project, Dr. Lee developed the SNUA herbarium (Herbarium of The Arboretum of Seoul National University) as the best University herbarium in Korea for the modem floristic work. Dr. Lee's first interest rests on his contributions to our understanding of the twig identification in early 1950. Asian deciduous oak taxa have attracted particular focus to him late 1950 and early 1960. Accordingly Dr. Lee has been one of the specialists on systematic study of Asian oak which is a basis of identification in eastern Asia now. Dr. Lee's contributions concerning rare and endangered plants in Korea provide a tremendous information after a Japanese taxonomist, T. Nakai did in early 1920 to late 1930 in Korea. During his fourteen year career from 1970 to 1984, Dr. Lee spent time to investigate flora of many local and National Park sites. Much of his effort was directed to the voucher specimens for which he worked for the Illustrated Flora of Korea and also served as a field collector. These collections at SNUA enabled us to extend our educational outreach from the local to the national flora research. Although Dr. Lee has been and continues to be the soul of SNUA, collection records about his purpose and aim for each trip are not well documented except date and field studied sites. This lesson enables us to tackle the same issue of balancing quantity and quality with well documented specimens now.

Seasonal Distribution of Mosquitoes According to Habitat Environment (2016-2018) (서식환경에 따른 모기 분포조사(2016-2018))

  • Park, Geun-Ho;Kim, Sung Il;Cho, Sung Woo;Cho, Sun-Ran;Lee, Seung-Ju;Kim, Hyun Kyung;Koo, Hyun-Na;Lee, Wook-Gyo;Cho, Shin-Hyeong;Kim, Gil-Hah
    • Korean journal of applied entomology
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    • v.57 no.4
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    • pp.381-392
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    • 2018
  • The distribution of mosquitoes collected in the Cheongju area from 2016-2018 were compared. The collection sites were established at a residential area, migratory bird sanctuary, and cowshed using black light (BL) and BG sentinel traps. Culex pipiens was the most collected species in the residential area, and Aedes vexans was the most collected species in the migratory bird sanctuary and cowshed in all years. The BG trap collected more individuals than did the BL trap in the residential area and migratory bird sanctuary. In total, 22,679 (10 species) mosquitoes were collected in 2016, and 6,502 (8 species) and 6,803 (9 species) mosquitoes were collected in 2017 and 2018, accounting for 3.49- and 3.33-fold decreases, respectively. The relationship between meteorological conditions and mosquito density, according to various variables, was not significant different. The Chaoyang virus was found in Aedes vexans and Culex pipiens collected at the cowshed in 2016 and 2018, respectively. Based on the results of this study, it is considered that continuous surveillance of mosquitoes should be performed for controlling mosquito populations and mediating diseases spread by this vector.

Proper Sampling Method for Larval Fish in the Western coastal Waters (서해 연안역에서 자어의 적정 채집 방법)

  • 차성식;박명정
    • 한국해양학회지
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    • v.30 no.1
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    • pp.64-68
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    • 1995
  • To investigate a proper sampling method for larval fish in the western coastal waters, the abundances of larval fish sampled at upper and lower layers during the day and nighttime were compared. The difference in the abundances at upper and lower layers seems to be related to the diurnal vertical migration of larval fish. Therefore, samples at upper layer during the day causes an underestimation of the number of species and the abundance. As the abundances through whole water column during the day is not significantly smaller than during the nighttime. samples obtained by oblique tow through whole water column during the day can be used to estimate the abundance of fish larvae.

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A Comparison of Samplers for Aquatic Macroinvertebrate in Rice Paddies: Aquatic Net, Quadrat and Core (논에 서식하는 수서 대형무척추동물의 채집기 비교: 채집망과 방형구 및 core)

  • Kang, Hyun-Kyung;Chung, Keun
    • Korean journal of applied entomology
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    • v.49 no.4
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    • pp.313-324
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    • 2010
  • With growing interest in biodiversity in rice paddies, efficient sampling methods for quantitative evaluation of aquatic macroinvertebrates are needed because of their important role in rice paddies' food webs. For this reason, we sought a proper sampling method through comparing data collected by using aquatic net, quadrat, and core in rice paddies located in Chuncheon-si, Kangwon-do, Hongseong-gun, and Chungcheongnam-do. Because the frame of the net was rectangular and had a flat bottom, the area, sampledwith the aquatic net, was calculated by multiplying the net width by the sweeping length, All samples were taken from the space between the rows of rice plants. Twenty four taxa of macro invertebrates were collected in Chuncheon and 28 taxa in Hongseong. In Chuncheon, the number of taxa was similar among three sampling methods (17-18 taxa), but the number of individuals was different (aquatic net, $1,317/m^2$; quadrat, $1,368/m^2$; core, $1,810/m^2$. In Hongseong, the number of taxa sampled by aquatic net was the highest (aquatic net, 25 taxa; quadrat, 21 taxa; core, 16 taxa), but the core was the highest in the number of individuals (aquatic net, $1,586/m^2$; quadrat, $2,595/m^2$; core, $3,704/m^2$. The efficiency of samplers differed among taxa. Most of aquatic insect taxa were more abundant in the aquatic net, while those living on or in the paddy substratum such as Oligochaeta and Chironomidae were collected more in the quadrat sampler. To collect quantitative data for aquatic insects as well as to produce inventory of rare taxa, we suggest, based on samplers used in this study, to take quantitative samples of 6 replications from each of the edge and inner zones of a rice paddy by using an aquatic net, and to take qualitative samples both from sides of levees and the inner zone of rice paddy by using an aquatic net.

Analysis of Fish Fauna by Sampling Gear as a Preliminary Survey for Ecosystem Health Assessments in Jinyang Reservoir (진양호에서 생태계 건강성평가를 위한 예비조사로서 어류채집도구별 종조성 분석)

  • Han, Jeong-Ho;An, Kwang-Guk
    • Korean Journal of Ecology and Environment
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    • v.43 no.1
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    • pp.103-116
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    • 2010
  • The key objective of this study was to analyze sampling efficiency of various fish sampling gears for a lentic ecosystem health assessment. This survey was conducted at twelve sampling locations of Jinyang Reservoir in November, 2008 and June, 2009. Sampling gears used in the field were fyke net (FN), gill net (GN), trammel net (TN), casting net (CN), minnow trap (MT), and kick net (KN). Fishes sampled in Jinyang Reservoir were 29 species, in which tolerant species, as a proportions of the total numbers, dominated the fish community compared to the sensitive species. Overall sampling indicated that 28 species (3,567 individuals) were sampled by the CN and 15 species (3,108 individuals) were sampled by the FN along with 14 species (577 individuals) by the TN, 7 species (107 individuals) by the GN, 6 species (59 individuals) by MT, and 5 species (95 individuals) by KN, respectively. Statistical analysis (MANOVA), based on CPUE of the fishing gears showed that fish species and numbers of the CN were significantly (p < 0.05) greater than those of any other sampling gears. In contrast, sampling gear of MT and KN showed the least efficiency in our survey. This survey is a preliminary results for the tests of sampling gear's efficiency in lentic ecosystems, thus further extensive studies are required for the verification.

Monthly Species Composition of Upstream-Migrating Fish in the Cheonjeyeon Estuary of Jeju, Korea (제주 천제연 하구 소상어류의 월별 종조성)

  • Hwang, Hak Bin;Lee, Tae Won;Hwang, Sun Wan;Kim, Byung-Jik
    • Korean Journal of Ichthyology
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    • v.20 no.3
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    • pp.210-219
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    • 2008
  • Monthly variation in species composition of upstream-migrating fish in the Cheonjeyeon Estuary was determined by analyzing fish data collected January~September 2004 and January~August 2007. Fish migrating from the sea to freshwater through the channels were collected by a rectangular net with a mesh size of 2 mm during the day and at night in the new moon. Of 14 species collected, ayu (Plecoglossus altivelis altivelis) and mullet (Mugil cephalus) predominated in abundance. Glass eels (Anguilla japonica) occurred mainly during the night from February to May. Other fishes collected included brackish-water gobiids (Gymnogobius urotaenia, Rhinogobius giurinus, Tridentiger obscurus, and Sicyopterus japonicus), freshwater fishes (Misgurnus anguillicaudatus and Rhynchocypris oxycephalus), and coastal marine fishes (Engraulis japonicus, Pempheris japonica, Plotosus lineatus, Takifugu niphobles, and Terapon jarbua). Ayu occurred during almost all sampling periods. They ranged principally from 55 to 100 mm total length (TL), with some fish larger than 100 mm TL collected after April. Mullet also occurred during almost all sampling periods. They ranged principally 25~58 mm TL, with some larger fish of 103~240 mm TL collected in February and April. That only a few freshwater and brackish-water fishes occurred in the study area is probably related to the freshwater systems having long been isolated from the continental systems and to the poorly developed estuaries in Jeju Island reflecting limited river discharge.

Zooplankton Sample Variability in the Coastal Area: The Necessity for the Replicate and Time Dependent Sampling (연안역 동물 플랑크톤 시료의 변이: 반복 채집 및 시간별 채집의 필요성)

  • Park, Chul
    • 한국해양학회지
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    • v.24 no.4
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    • pp.165-171
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    • 1989
  • To examine the sample variability of zooplankton, samples were collected at two stations in the nearshore off Anhung (Chungnam, Korea), using a NORPAC net (76 Cm diameter, 0.333 mm mesh size) for two days, April 5 and 6, 1989. The net was towed vertically to eliminate the source of variation due to vertical migration. During the period of 6 hours, triplicate sampling was done every one or two hour at each station. Species composition and abundances at two stations were not so different, but the abundances at each station varied greatly with respect to sampling time. Greater abundance at one sampling time ranged 2.3-8.7 times of smaller abundance at another sampling time. At the level of ${\alpha}=0.05$, however, mean abundances of different sampling time did not differ significantly from each other due to the large variance. It was believed that the large variance was caused by the time dependent effect of patchiness of which parameters were varied with time because of sea water movement. From the variation within the triplicate samples, it was considered that the abundance data obtained from single tow were not significantly different from the data in the range of 50-200% of those from single tow. From these results, the necessity for the replicate and time dependent sampling was indicated. In the nearshore like the sampling site of this study, it seemed to be better to reduce the number of stations for the replicate and time dependent sampling though the proper sampling scheme was to be decided based on the goal of the study.

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