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Dissertations / Theses on the topic 'Trap sampling'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Fike, William H. "Lobster Sampling Trap." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/FikeWH2007.pdf.

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2

Topping, Christopher J. "Pitfall trap sampling and community analysis of grassland spiders." Thesis, University of Newcastle Upon Tyne, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278815.

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3

Potgieter, Nardus. "Analysis of beer aroma using purge-and-trap sampling and gas chromatography." Pretoria : [s.n.], 2006. http://upetd.up.ac.za/thesis/available/etd-09282007-140010.

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4

Murray, Jacolin Ann. "High Flow Air Sampling for Field Detection Using Gas Chromatography-Mass Spectrometry." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2414.

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The ability to rapidly detect and identify hazardous analytes in the field has become increasingly important. One of the most important analytical detection methods in the field is gas chromatography-mass spectrometry (GC-MS). In this work, a hand-portable GC-MS system is described that contains a miniature toroidal ion trap mass analyzer and a low thermal mass GC. The system is self-contained within the dimensions of 47 x 36 x 18 cm and weighs less than 13 kg. Because the instrument has a small footprint, it was used as the detector for an automated near-real-time permeation testing system. I

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5

Karlsson, Niklas. "Identifiering av åtgärder som kan bidra till att förbättra analysen av miljökemiska sedimentundersökningar : En studie på provtagningsdata från Kalmarsund och Oskarshamns hamn." Thesis, Linnéuniversitetet, Institutionen för biologi och miljö (BOM), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-28307.

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Föroreningar av metaller är ett problem längs med kusterna, vilket har en negativ inverkan på vattenlevande organismer och miljön. Orsaken till detta beror till stor del på pågående utsläpp från tätorter, hamnar, industrier och på ”gamla synder (då det inte fanns några detaljerade miljölagar som reglerade spridningen av föroreningar från exempelvis industriprocesser)”. Utsläpp av föroreningar behöver inte bara komma lokalt utan kan också transporteras via avrinningsområdena och via atmosfäriskt nedfall. Idag arbetar länsstyrelsen med att invertera och sanera förorenade områden, men för att kun

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6

Stancliffe-Vaughan, Abigail E. "Sampling UK Pacifastacus leniusculus (Dana, 1852): the effect of trapping on population structure." Thesis, Anglia Ruskin University, 2015. https://arro.anglia.ac.uk/id/eprint/579908/1/Signal%20crayfish%20ASV%20MPhil%202015.pdf.

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Populations of non-native signal crayfish, Pacifastacus leniusculus, are damaging to UK native species and habitats though their populations are expanding with no coherent framework in place for their control. This is partly the result of a literature gap on the effect of trapping on non-native crayfish population structure which this thesis will explore in order to add to the European literature. Population size structure analysis has been facilitated via the creation of novel samplers and an in-depth analysis of the effect of aperture on the size/life stage of crayfish sampled. Smaller trap

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Stancliffe-Vaughan, Abigail E. "Sampling UK Pacifastacus leniusculus (Dana, 1852) : the effect of trapping on population structure." Thesis, Anglia Ruskin University, 2015. http://arro.anglia.ac.uk/579908/.

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Populations of non-native signal crayfish, Pacifastacus leniusculus, are damaging to UK native species and habitats though their populations are expanding with no coherent framework in place for their control. This is partly the result of a literature gap on the effect of trapping on non-native crayfish population structure which this thesis will explore in order to add to the European literature. Population size structure analysis has been facilitated via the creation of novel samplers and an in-depth analysis of the effect of aperture on the size/life stage of crayfish sampled. Smaller trap

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8

Wills, Johnny. "DNA-based hair sampling to identify road crossings and estimate population size of black bears in Great Dismal Swamp National Wildlife Refuge, Virginia." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/34932.

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<p>The planned widening of U.S. Highway 17 along the east boundary of Great Dismal Swamp National Wildlife Refuge (GDSNWR) and a lack of knowledge about the refugeâ s bear population created the need to identify potential sites for wildlife crossings and estimate the size of the refugeâ s bear population. I collected black bear hair in order to collect DNA samples to estimate population size, density, and sex ratio, and determine road crossing locations for black bears (Ursus americanus) in GDSNWR in southeastern Virginia and northeastern North Carolina. I also investigated bear/vehicle co

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9

Neves, Carolina Lima. "Efeitos da defaunação na comunidades de pequenos mamíferos na Mata Atlântica /." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/99489.

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Resumo: 1. As armadilhas convencionais são amplamente utilizadas em estudos com pequenos mamíferos não-voadores, mas geralmente acarretam um viés de amostragem. Além disso, efeitos da qualidade do microhabitat e da sazonalidade podem influenciar a estimativa da diversidade. 2. Nós comparamos dois métodos de amostragem de pequenos mamíferos: armadilhas de captura viva e de queda, sendo a riqueza de espécies e número de indivíduos variáveis resposta. Os levantamentos de campo foram realizados em uma área contínua de Mata Atlântica. Os efeitos das variáveis de microhabitat e da sazonalidade sobre

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10

Midgarden, David Gunder. "Spatial distribution of western corn rootworm (Diabrotica virgifera virgifera Leconte) trap counts and evaluation of a novel method for sampling soil pests of field corn." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06302009-040212/.

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11

Xie, Xiaofeng. "High Flow Air Sampler for Rapid Analysis of Volatile and Semi-Volatile Organic Compounds." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6165.

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Volatile and semi-volatile organic compounds are ubiquitous, and some of them are hazardous. The ability to rapidly detect and identify trace levels of them in air has become increasingly important. The conventional device used today for sampling and concentrating them in air is thermal desorption tubes filled with specific sorbents, which can only collect air samples at flow rates of 100-200 mL/min. In order to detect low concentration (ppt level) VOC compounds, long sampling time (>2 h) and sensitive detection are required. At the same time, portable instrumentation for on-site analysis has

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12

Kim, Hang Joon. "The Generalized Multiset Sampler: Theory and Its Application." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1338332071.

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13

Neves, Carolina Lima [UNESP]. "Efeitos da defaunação na comunidades de pequenos mamíferos na Mata Atlântica." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/99489.

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Made available in DSpace on 2014-06-11T19:30:14Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-02Bitstream added on 2014-06-13T18:59:59Z : No. of bitstreams: 1 neves_cl_me_rcla.pdf: 579299 bytes, checksum: 4e0eb889aafa2deb8e85b3bfdbcfb15a (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>As armadilhas convencionais são amplamente utilizadas em estudos com pequenos mamíferos não-voadores, mas geralmente acarretam um viés de amostragem. Além disso, efeitos da qualidade do microhabitat e da sazonalidade podem influenciar a estimativa da diversidade. 2.

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14

Persson, Annika. "Sedimentprovtagning av dagvattendammar som ett alternativ till flödesproportionell vattenprovtagning." Thesis, Institutionen för mark och miljö, SLU, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-123424.

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<p>Stormwater run-off from surfaces such as roads or rooftops is often polluted with heavy metals and nutrients. Many of these substances can cause great damage in biota if they end up in the recipient. In Sweden constructed wetlands and ponds for treatment of stormwater are frequently used, since research has shown that these treatment ponds are reducing stormwater pollution considerably to a low cost. The knowledge of these pollutant removal mechanisms and how follow-up and assessment of the ponds should be performed is still limited.</p><p>To determine the pollutant removal efficiency of th

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15

Amoah, Barbara Amoh. "Monitoring populations of the ham mite, Tyrophagus putrescentiae (Schrank) (Acari: Acaridae): research on traps, orientation behavior, and sampling techniques." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32489.

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Doctor of Philosophy<br>Department of Entomology<br>Thomas W. Phillips<br>The phase-out of methyl bromide production, the most effective fumigant for the control of the ham mite, Tyrophagus putrescentiae (Schrank) (Acari: Acaridae), on dry-cured ham has necessitated the search for other management methods. The foundation of a successful management program is an effective monitoring program that provides information on pest presence and abundance over time and space to help in making management decisions. By using the standard trap made from disposable Petri dishes and a dog food-based bait, mi

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16

Kuhar, Thomas P. "Western corn rootworm damage assessment in Virginia and adult sampling with commercial yellow sticky traps." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45474.

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The risk of corn rootworm damage to continuously-grown corn was assessed in 32 fields from seven counties in Virginia in 1993 and 1994, Approximately 28% of the fields examined had economic root damage in corn left untreated with a soil insecticide. In addition, 190/0 of the fields overall had an economic loss in silage due to corn rootworm damage. A second study evaluated the effectiveness of using adult corn rootworm counts on commercial Olson yellow sticky traps and ear-zone regions of corn plants to predict subsequent damage to corn. Regression models for each sampling method were used

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17

Kuhar, Thomas Patrick. "Western corn rootworm damage assessment in Virginia and adult sampling with commercial yellow sticky traps /." This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11072008-063517/.

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18

Davies, Christopher. "New insights into wild deer population genetics, ecology and impacts : implications for management in south eastern Australia." Thesis, Federation University Australia, 2019. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/173292.

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This thesis is a compilation of my own work, driven by my interest into the ecology and impacts of introduced deer in Victoria. My interest in deer initially lead me to undertake an honours project, focussed on deer as a vector for parasites that can affect domestic livestock. During my honours year it became apparent that little was known about the ecology of wild deer throughout south east Australia. My PhD study was therefore developed to fill knowledge gaps of deer ecology, with a focus on developing and optimising ecological tools to generate data to improve deer management strategies. Th

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19

Betts, David Jensen. "Investigation of Potential Trapping Bias in Malaise Traps Due to Mesh Gauge, in Two Habitats." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2561.

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Malaise traps are a common tool for collecting insects used by many researchers. Although there have been variations in the models and materials used for Malaise traps, the potential for sampling bias due to mesh gague has been explored inadequately. This study compared coarse and fine mesh Townes model Malaise traps in two habitats on the Grand Staircase-Escalante National Monument. The two habitats next to the Lick Wash trailhead were defined by dominant vegetation type – sagebrush and grasses or Piñon-Juniper. We collected from three sites per habitat type, over three consecutive days in Ju

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20

Gallet, Yves. "La magnetostratigraphie : aspects fondamentaux et appliques." Paris 7, 1988. http://www.theses.fr/1988PA077056.

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Une eetude magnetostratigraphique de la limite jurassique/cretace au maroc permet de discuter les possibilites de correlation stratigraphique en l'absence d'une biostratigraphie bien etablie. Avec des donnees du forage de cony, on met en evidence des series triasiques et permiennes. Les resultats paleomagnetiques permettent de preciser la derive des poles magnetiques de l'eurasie. On modelise aussi le champ magnetique a l'interieur d'un forage

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21

Martínez, Blay Victoria. "Biology and management, by application of classical biological control, of the invasive mealybug Delotoccoccus aberiae (Hemiptera:Pseudococcidae) in citrus orchards in Spain." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/106363.

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Delottococcus aberiae (Hemiptera: Pseudococcidae) es un pseudocóccido invasor originario del África subsahariana que fue detectado causando graves daños en cítricos del este de España en el año 2009. Debido al desconocimiento existente sobre esta especie, la gestión de D. aberiae se ha llevado a cabo mediante el uso de tratamientos químicos autorizados contra este tipo de insectos. Sin embargo, la última Directiva Europea (2009/128/EC) sobre el uso sostenible de productos fitosanitarios estipula que la aplicación de plaguicidas en el ámbito agrícola debe reducirse, promoviendo estrategias de m

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22

Adawi, Rahim. "Preventing fatal effects of overworking : Product design solution." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-15473.

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“Overworking to death” is a phenomenon that has been noticeable in developing countries. The cause of death is mainly through ischemic strokes. While the victims’ occupations differed, they all shared a common characteristic, being positioned in a sedentary work, ranging from IT workers to doctors. This project’s aim was to develop a product that prevented or decreased the strokes that derived from sedentary overwork. This was mainly tackled by preventing one of the three causes of developing blood props, slowed blood flow. In order to gather rich data of the phenomenon, a qualitative study wa

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23

Zhan, Weiqiang. "Optimization of a Needle Trap Device." Thesis, 2011. http://hdl.handle.net/10012/6334.

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Various needle trap devices (NTDs) with different designs for different applications have been developed during the past decade. A theoretical model on the fundamentals of the NTD was recently proposed, which employed the theory of frontal (gas-solid) chromatography to describe the sampling process, where a gaseous sample was continuously introduced into the sorbent bed. In this investigation, different types of sorbent particles with different dimensions were packed into the needle as adsorbents. The effect of particle dimension, which would affect the packing density and consequently the cap

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24

Potgieter, Nardus. "Analysis of beer aroma using purge-and-trap sampling and gas chromatography." Diss., 2007. http://hdl.handle.net/2263/28252.

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Fingerprint profiles generated through GC analysis, are powerful tools for quality control in the food and beverage industry. Beer aroma profiles can be used for the fingerprinting of specific beer brands or for trouble shooting purposes such as the identification of off-flavours. The multichannel silicone rubber trap (MCT) lends itself perfectly to this task. The simplicity and robustness of the MCT makes it ideal for concentrating the volatile compounds that constitute the aroma of an alcoholic beverage such as beer. The retention of these substances by the silicone is based on dissolution i

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25

Shojania, Shaheen. "Active and passive sampling of volatile organic compounds using the inside needle capillary adsorption trap (INCAT) device." 2000. http://hdl.handle.net/1993/19550.

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26

Lahajnar, Niko [Verfasser]. "Organic matter degradation in the deep sea : results from sediment trap studies and surface sediment sampling / vorgelegt von Niko Lahajnar." 2006. http://d-nb.info/981696511/34.

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27

ČELOUDOVÁ, Monika. "Prostorová distribuce vodních ploštic (Heteroptera: Nepomorpha) v rybářsky obhospodařovaných rybnících: odhad a srovnání na základě výsledků dosažených klasickou metodou odchytu (cedníkem) a metodou světelných pastí." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-44798.

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The aim of this methodically oriented thesis was to find spatial distribution of water bugs in fishpond by parallelly used two different sampling methods - classic method (netting) and light traps as well as to find, if sampling method can influence a result of ecological study by substantial way. Study was realized in the one locality - fishpond Polepšil (region: Vysočina: Moravskobudějovicko) in years 2007 and 2008. Spaces {--} transects for sampling were difined. Efficiency of water bug sampling by nett is conspicuously less than sampling by light traps. More species and individuals (in tot

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28

ČERNÁ, Lenka. "Srovnání výsledků užití vybraných metod odchytu při studiu taxocenu vodních ploštic (Heteroptera: Nepomorpha)." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-45570.

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Results of water bug sampling ascertained by selected sampling methods (net trapping and different water light traps) were compared in this thesis. Selected ecological characteristic of taxocen, based on data gained by these methods, are calculated and compared. The water light trap with heterochromatic LEDs (white LEDs respectively) was found the most forceable method for sampling of both water bug species and their specimens.

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