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Dissertations / Theses on the topic 'Gammarus pulex'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Fear, Lesley Anne. "Microbial ecology of the gut of Gammarus pulex." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250026.

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2

Crane, Mark. "The use of Gammarus pulex (L.) to assess pollution." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333512.

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3

Bollache, Loïc. "Sélection sexuelle, parasitisme et patterns d'appariement chez le crustacé amphipode Gammarus pulex." Lyon 1, 2001. http://www.theses.fr/2001LYO10206.

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La biologie de reproduction de Gammarus lupex est caractérisée par une phase de gardiennage précopulatoire couramment analysée comme une stratégie compétitive développée par les mâles afin d'assurer leur reproduction. Une homogamie en fonction de la taille est fréquemment observée lors de cette phase de gardiennage, tel que les grands mâles sont appariés aux grandes femelles, et les mâles d'une taille moindre aux femelles plus petites. Un suivi sur le terrain de plusieurs populations naturelles, complété par des expériences au laboratoire ont permis de préciser le ou les processus responsables

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4

Clarke, Hazel Caroline. "Ecology and behaviour of the invasive freshwater amphipod gammarus pulex (L.)." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.601109.

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The sucess of invasive species is said to depend upon the availability of resources, interactions with natural enemies and the abiotic environment. However, the behavioural interactions also play an important role. This thesis uses the freshwater amphipod Gammarus pulex (L.) to investigate the ecology and behaviour of an invasive species, with particular emphasis on female reproduction.

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5

Dick, Jaimie T. A. "Assessments and decisions during mate choice in Gammarus pulex (Crustacea: amphipoda)." Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336112.

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6

Miller, Thomas Henry. "Measurement and modelling of pharmaceutical bioconcentration in an aquatic invertebrate, Gammarus pulex." Thesis, King's College London (University of London), 2017. https://kclpure.kcl.ac.uk/portal/en/theses/measurement-and-modellingof-pharmaceutical-bioconcentration-in-an-aquatic-invertebrate-gammarus-pulex(0cb58627-4405-4096-b735-d5344357c171).html.

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The aim of this work was to understand the bioconcentration potential of pharmaceuticals in a freshwater invertebrate. The novelty of this work lies in several parts of which the most important was that a computational model was developed to successfully predict bioconcentration in invertebrates, which has not been achieved previously. For the first time, a developed analytical method using liquid chromatography tandem mass spectrometry (LC-MS/MS) was used to determine the occurrence of pharmaceuticals in Gammarus pulex across several tributaries of the River Thames (London, UK). The occurrenc

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7

Holmgen, Jonas. "Ger olika temperaturförhållanden ¨trade off¨- effekter mellan tillväxt och exokutikulans tjocklek hos Gammarus pulex? En pilotstudie." Thesis, Halmstad University, School of Business and Engineering (SET), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-928.

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<p>I rinnande vatten, så som bäckar och åar, har Gammarus pulex en viktig ställning i näringsväven. Arten bidrar till att bryta ner organiskt material och göra energin i detta tillgänglig för andra organismer. G. pulex är dessutom en viktig föda för ett stort antal predatorer. Flera studier visar att G. pulex reagerar på olika temperaturer. Tillväxthastighet, livslängd, reproduktion, aktivitet och syreförbrukning är exempel på karaktärer som påverkas av temperaturen. Ingen studie har tidigare behandlat om anläggningen av exokutikula påverkas av temperaturen. En höjd temperatur ökar tillväxthas

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8

Bentley, Christopher R. "The pathophysiology of Pomphorhynchus laevis (Acanthocephala) in its intermediate host Gammarus pulex (Crustacea)." Thesis, Keele University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359161.

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9

Hadfield, Simon John. "Genetic structure and colonisation history of European and UK population of Gammarus pulex." Thesis, University of Hull, 2002. http://hydra.hull.ac.uk/resources/hull:5483.

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The structure of populations has been studied for many years and there have been three main factors that have been suggested as the cause for present-day distributions of species, those being environment, biology and history. With the use of molecular data and advanced phylogeographic approaches it is now possible to distinguish between the main causes of population structuring. The present study considers the extent of population structure in G. pulex on regional (UK) and large geographic (Europe) scales using studies of molecular genetic (allozymes, mtDNA sequencing and microsatellites) and

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10

Amer, Aisha Arhouma Ali. "The effect of cadmium chloride on the biology of Gammarus pulex (Crustacea: Amphipoda)." Thesis, University of Exeter, 2014. http://hdl.handle.net/10871/15496.

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Increased releases of cadmium to the aquatic environment have raised concern over the potential for adverse impacts on freshwater organisms in affected aquatic bodies. This thesis explored the responses of a common freshwater amphipod, Gammarus pulex (G. pulex) to sublethal concentrations of cadmium under different environmental conditions and at various stages of the lifestyle. Endpoints studied encompassed molecular, cellular, physiological and behavioural changes, to enable a comprehensive analysis of the effects of the organism. Exposure to sublethal concentrations of cadmium (Cd) (0.001,

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11

Gross, Melanie Yvette. "Effects of sewage effluent and nonylphenol on the fresh water amphipod Gammarus Pulex (L.)." Thesis, Royal Holloway, University of London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395482.

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12

Love, Adrian Charles. "The sub-lethal impacts of waste water effluent and its components on Gammarus pulex." Thesis, University of Portsmouth, 2017. https://researchportal.port.ac.uk/portal/en/theses/the-sublethal-impacts-of-waste-water-effluent-and-its-components-on-gammarus-pulex(fcb48eba-b5b1-48bd-87f4-5682713319eb).html.

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The prevalence of pharmaceuticals and personal care products (PPCPs) in lotic habitats is increasing, with the main source of these contaminants being effluent from waste water treatment works (WwTW). There is still much uncertainty about the impacts of these PPCPs at environmentally relevant concentrations and their potential effects on populations. This thesis provides an evaluation into the effects of WwTW, their effluent, and the PPCP they contain on a typical and important freshwater invertebrate, Gammarus pulex, using field and laboratory observations. A two-year investigation into G. pu

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13

Kingsley-Shadish, Antonipillai. "Behaviour of Gammarus pulex (L.) (Crustacea, Amphipoda) in response to intermittent pulses of dissolved copper." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248015.

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14

Dando, Chrtistine. "The effect of zinc on physiological function in Gammarus pulex : a between-individual variation approach." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274947.

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15

Adam, Olivier. "Impact des produits de traitement du bois sur les amphipodes Gammarus pulex (L. ) et Gammarus fossarum (K. ) : approches chimiques, hydro-écologique et écotoxicologique." Besançon, 2008. http://www.theses.fr/2008BESA2071.

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Afin de les protéger des attaques des champignons et des coléoptères, les bois d'oeuvre issus de résineux sont traités par des fongicides et/ou des insecticides lors d'une ou de plusieurs étapes de leur transformation. Ces derniers sont le plus fréquemment la cyperméthrine et la deltarnéthrine (insecticides de la famille des pyréthrinoïdes de synthèse), le 3-Iodo-2-propynyl but yI carbamate (IPBC, fongicide/bactéricide appartenant à la famille des carbamates), ainsi que le propiconazole et le tébuconazole (fongicides de la classe des triazolés). Or, pour des raisons historiques, les scieries d

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16

Mohamed, W. F. A. "Palladium uptake and its effect on behavioural and molecular markers in the freshwater shrimp Gammarus pulex." Thesis, Nottingham Trent University, 2015. http://irep.ntu.ac.uk/id/eprint/28316/.

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The expanded use of platinum group elements (PGEs), platinum (Pt), palladium (Pd), and rhodium (Rh), in automobile catalysts has led to increased levels of these metals in aquatic environments. However, data regarding acute toxicity and the sublethal effects of these metals on aquatic biota are limited. This study aimed to explore the response of the freshwater amphipod Gammarus pulex to PGEs. Investigations included the 96 LC50 test and several behavioural (vertical movement and feeding activity) and biochemical (acetylcholinesterase (AChE); osmoregulation; 3-[4,5-dimethylthiazol-2-yl]-2,5-di

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17

Ash, Nicholas Watson. "Fungal determinants of feeding preference for the two stream detritivores Gammarus pulex (L.) and Asellus aquaticus (L.)." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.559792.

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18

Graca, Manuel Augusto Simoes. "Observations on the feeding biology of two stream-dwelling detritivores : Gammarus pulex (L.) and Asellus aquaticus (L.)." Thesis, University of Sheffield, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244076.

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19

Ennis, Marilyn. "Parasite effects on the feeding behaviour and functional response of the invasive amphipod Gammarus pulex (Crustacea; Amphipoda)." Thesis, Queen's University Belfast, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.705915.

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Parasites can structure communities and may impact on resource competitive interactions in novel communities. The amphipod Gammarus pulex is invasive in Ireland and in low land river stretches has displaced the native congener Gammarus duebeni celticus. Parasitism may facilitate invasion success by the more efficient use of resources. The functional response (the relationship between prey density and prey consumption) is a means of predicting the likely impact of an invader. In this thesis parasitism by two different acanthocephalan parasite species (Echinorhynchus truttae and Polymorphus minu

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20

Vignoles, Philippe. "Toxicite du benzamido-2 nitro-5 thiazole et de onze derives sur lymnaea peregra ovata muller, gammarus pulex pulex l. Et euglena gracilis klebs. Relations structure-activite quantitatives." Limoges, 1990. http://www.theses.fr/1990LIMO0107.

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L'efficacite in vitro de douze derives du benzamido-2 nitro-5 thiazole substitues sur le cycle benzenique a ete etudiee sur trois especes: lymnaea peregra ovata, gammarus pulex pulex et euglena gracilis. Les resultats obtenus ont ete compares a ceux obtenus avec un produit de reference, le niclosamide. La determination: 1) de la cl50 (concentration de toxique pour laquelle on obtient 50% de mortalite) chez l. P. Ovata et g. P. Pulex, et 2) de la cl50, de la ci50 (concentration de toxique reduisant de 50% la croissance) et de la camax (concentration provoquant une activation maximale de la croi

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21

Warwick, Oliver William Tindle. "The use of a biomarker to assess the effect of xenobiotic exposure on the freshwater invertebrate Gammarus pulex." Thesis, University of Sheffield, 1997. http://etheses.whiterose.ac.uk/10191/.

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Contamination of freshwaters is of concern because of its effect on ecosystem health. The effect of contamination can be assessed at all levels of biological organisation, from the ecosystem level to the molecular level. At the biochemical level, enzymes that are involved in the detoxification of organic chemical contaminants are useful as markers of contaminant exposure as they are often one of the first systems to respond to chemical exposure. Furthermore, changes in the activity of these enzymes may be indicative of effects at higher levels of biological organisation. In this study, the use

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22

Elwahaishi, S. S. "The effect of the sheep dip pesticide diazinon on behavioural and molecular markers in the freshwater shrimp Gammarus pulex." Thesis, Nottingham Trent University, 2012. http://irep.ntu.ac.uk/id/eprint/199/.

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The purpose of this research was to determine the effects of the organophosphorothioate pesticide diazinon, its metabolite diazinon oxon and diazinon in a commercial formulation on the freshwater amphipod Gammarus pulex. It was found that diazinon in the commercial formulation was significantly more toxic to G. pulex than diazinon oxon, which in turn was significantly more toxic than diazinon. In non-lethal ecotoxicity assays, 24 h exposure to diazinon and diazinon in the commercial formulation significantly inhibited the vertical movement of G. pulex, whereas diazinon oxon had no significant

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23

Vellinger, Céline. "Effets d'expositions métalliques simples ou multiples à différentes températures chez Gammarus pulex : approche multi-marqueurs et perspectives en bioévaluation." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0287/document.

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Les contaminations multiples par des métaux et métalloïdes menacent la structure et le fonctionnement des écosystèmes aquatiques. Pourtant, les mécanismes d'action des polluants, leurs interactions et leur toxicité dans un contexte de réchauffement climatique sont encore peu abordés. Parallèlement, nous avons un besoin urgent de marqueurs d'alerte (i.e., précoces, sub-létaux) des effets de ces substances. Par ailleurs, une attention croissante est actuellement portée au protéome des êtres vivants, considéré comme une entité dynamique, modifié par les conditions du milieu. Dans ce contexte, nou

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24

Poulton, Madeline June. "Toxic effects of freshwater pollutants on the survival, behaviour and reproduction of Gammarus pulex (L.) and Asellus aquaticus (L.)." Thesis, Cardiff University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320266.

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The toxic effects of cadmium on aspects of the survival, behaviour and reproduction of Gammarus pulex and Asellus aquaticus are described in some detail. Some of the laboratory procedures were validated in field experiments. The presence of the parasites Pomphorhynchus laevis and Echinorhynchu_s1truttae does not modify the toxicity of cadmium (0.01-1.0 mgl ) to their intermediate-Fost G. pu7ex. Pretreatment for 24 hours with 0-47 μgl cadmium alters the distribution of separation times when precopula pairs of G. pu7ex are disrupted by the invertebrate anaesthetic 2- phenoxyethanol. Precop1la is

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25

Choudhury, Md Maidul Islam. "Does an evolutionary change in the water sowbug Asellus aquaticus L. alter its functional role?" Thesis, Linköpings universitet, Ekologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-74766.

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The ecology behind evolutionary diversification is a well studied area of research, whereas the effects of evolution on ecosystems get little attention. In line with ecological theory, evolutionary diversification of a species could influence different ecosystem aspects such as food web composition, energy flow, nutrient cycling etc. The main objective of this study was to investigate whether two diverging ecotypes (reed and chara) of Asellus aquaticus differ regarding their role in two aquatic ecosystem processes: decomposition of terrestrial leaves and grazing of periphyton. Their role in ec

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26

Foucreau, Natacha. "Étude des réponses écophysiologiques et fonctionnelles de populations de l'organisme clé Gammarus pulex (crustacea, Amphipoda) dans un contexte de changement climatique, au sein de la vallée du Rhône." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10256/document.

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L’étude des conséquences du réchauffement climatique sur les écosystèmes aquatiques est devenue un enjeu majeur pour la recherche. Nous avons mesuré l’impact de la température des eaux douces et du changement de végétation riparienne associé au climat sur six populations de Gammarus pulex (Amphipode) vivant au nord ou au sud de la vallée du Rhône (France). Ce crustacé, largement répandu dans les eaux douces européennes, est considéré comme une espèce clé pour le fonctionnement des écosystèmes aquatiques, car, en dégradant la litière de feuilles provenant de la ripisylve, il favorise son utilis

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27

Aronsson, K. Andreas. "Effects of wood ash on freshwater organisms and aquatic forest ecosystems." Doctoral thesis, Sundsvall : Mittuniversitetet, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-36.

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