Dissertations / Theses: 'Röding'

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Oskarsson, Conny, and Bengt-Erik Yngve. "Äter Mellanskarv i Sommen det unika beståndet av röding och öring?" Thesis, Linköping University, Department of Thematic Studies, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2314.

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Detta är ett naturvetenskapligt arbete som omfattas både av en kvantitativ och en kvalitativ undersökning. Syftet med arbetet är att undersöka mellanskarvens födoval i sjön Sommen, samt att närmare studera huruvida det unika beståndet av röding och öring ingår i mellanskarvens födoval. Sommens Fiskevårdsområde har fått tillstånd till skyddsjakt på mellanskarv av Länsstyrelsen och det främsta skälet skulle vara att fågeln prederar röding och öring. Genom att analysera mellanskarvens spyboll och jämföra innehållet med referensfiskar fångade från samma sjö ska vi se om beslutet från Länsstyrelsen är befogat. Insamling av spybollar och referensfiskar utfördes i fält medan analys av spybollar utfördes på laboratorium. I resultatet av undersökningen konstaterades att mellanskarven i Sommen nästan uteslutande äter abborre. I de analyserade spybollarna som omfattas av denna undersökning återfanns inte röding och öring. Detta skulle innebära att Länsstyrelsens beslut om skyddsjakt på mellanskarv i Sommen p.g.a. predation av röding och öring inte är befogad.

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Norberg, Joakim. "Utvärdering av sjökalkningens eventuella effekter på öring och röding i jämtländska fjällsjöar." Thesis, Umeå University, Ecology and Environmental Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-27800.

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Monteiro, Júlio Cesar. "Estudo sobre as espécies brasileiras de Astraea Röding, 1798 (Mollusca, Gastropoda, Turbinidae)." Universidade Federal do Rio de Janeiro, 1997. http://hdl.handle.net/11422/4027.

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Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-06-14T18:27:09Z No. of bitstreams: 1 278478.pdf: 8521282 bytes, checksum: d3af1e302eb6e49c2a8b3eea361c4d9d (MD5)
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Foram estudadas espécies do gênero Astraea Röding, 1798, A. (Astralium) latispina (Philippi, 1844) e A. (Lithopoma) olfersii (Philippi, 1846), com base na concha, opérculo, morfologia externa das partes moles, cavidade palial, sistemas digestivo e urogenital, consideradas e discutidas as semelhanças e diferenças, apresentadas as respectivas listas sinonímicas. A conquiliologia comparada das espécies brasileiras com A. (Astralium) phoebia Röding, 1798 e A. (Lithopoma) americana (Gmelin, 1791) demonstrou a validade destas espécies considerando equivocadas as referências de ocorrência para o Brasil. As caracterizações gerais dos táxons supraespecíficos e as necessárias comparações do estudo das partes moles das espécies da superfamília foram realizados com base em dados bibliográficos apresentando as respectivas considerações e discussões.
The species of genus Astraea Röding, 1798, A. (Astralium) latispina (Philippi, 1844) and A. (Lithopoma) olfersii (Philippi, 1846), were study based on shell, opercula, external morphology of soft parts, mantle cavity, digestive and urogenital systems, similarities and diferences are regarded and discussed, the respective synonymies are given. The comparative conchology of the Brazilian species with A. (Astralium) phoebia Röding, 1798 and A. (Lithopoma) americana (Gmelin, 1791) showed that they are valid species but the references are regarding equivocated occurence for Brazil. The general features of supraspecific taxons and the necessary comparison on study of soft parts of the superfamily species realized based on bibliografic's information with respectives regardfulness and discussions.

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Jonsson, David. "Temperature dependent competitive interactions between Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta)." Thesis, Umeå University, Ecology and Environmental Science, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-27799.

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Röding, Vera [Verfasser]. "Aufsuchende psychiatrische Versorgung gerontopsychiatrischer Patienten in Altenheimen durch die Psychiatrische Institutsambulanz (PIA) - eine naturalistische Evaluationsstudie / Vera Röding." Greifswald : Universitätsbibliothek Greifswald, 2013. http://d-nb.info/1042174229/34.

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Röding, Stefanie [Verfasser], and Matthias [Akademischer Betreuer] Siebeck. "Simulationsbasierte Lernumgebungen zum Erwerb komplexer Fertigkeiten in tabuisierten Bereichen des ärztlichen Berufes / Stefanie Röding. Betreuer: Matthias Siebeck." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1037688023/34.

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Röding, Philipp [Verfasser], and Florian [Gutachter] Sprenger. "Observation, speculation, spectacle: visual culture(s) at the observation deck, 1968-2020 / Philipp Röding ; Gutachter: Florian Sprenger." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2021. http://nbn-resolving.de/urn:nbn:de:hebis:30:3-624219.

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Röding, Matthias [Verfasser], Reiner [Akademischer Betreuer] Thomä, Dirk [Gutachter] Heberling, and Jörn [Gutachter] Thielecke. "Polarimetrische Analyse breitbandiger Radar-Signale für bildgebende Anwendungen / Matthias Röding ; Gutachter: Dirk Heberling, Jörn Thielecke ; Betreuer: Reiner Thomä." Erfurt : Universitätsbibliothek Erfurt, 2020. http://d-nb.info/1216111901/34.

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Stenton-Dozey, Jeanette Mary Edgeworth. "Physiology and energetics of the sandy-beach bivalve Donax serra Röding with special reference to temperature and chlorine tolerance." Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/15894.

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Bibliography: pages 287-318.
This thesis examines the physiology and energetics of D. serra and considers physiological responses to elevated temperature and chlorine levels typical of sea water discharged from a nuclear power station.

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Röding, Sebastian [Verfasser], Tobias [Gutachter] Brixner, Ingo [Gutachter] Fischer, and Jens [Gutachter] Pflaum. "Coherent Multidimensional Spectroscopy in Molecular Beams and Liquids Using Incoherent Observables / Sebastian Röding ; Gutachter: Tobias Brixner, Ingo Fischer, Jens Pflaum." Würzburg : Universität Würzburg, 2018. http://d-nb.info/1151447242/34.

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Norén, Oskar. "Konkurrensen mellan röding, sik och lake i Vättern : En djupdykning i tre konsumenters födopreferenser. Två tidsperioder: 1964-1978 samt 2006-2011." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-18066.

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Lake Vättern contains Swedens most valuable population of arctic charr (Salvelinus umbla). The stock of this Salmonidae fish showed a negative trend for several decades but has now turned to a more positive one. Too minimize the risk of a new backlash it is important to obtain knowledge about the arctic charr and its interaction with other species. The purpose of this paper is to investigate the interspecific competition between arctic charr and two other valuable species i.e. whitefish (Coregonus maraena) and burbot (Lota lota). Data of stomach contents from two periods (1964-1978 & 2006-2011) were analyzed. The consumers were divided into different groups with respect to size and season. The measure of the competition was then answered quantitatively with two indexes (Pianka & Laubmeier). The results support the conclusion that small charr (<30 cm) was exposed of remarkably tough competition from whitefish regarding the older period. This derives from the fact that these two species show a very similar diet including Opossum shrimp (Mysis relicta) and Monoporeia affinis. With increasing size charr turns to a more piscivore diet and begins to compete with burbot. The piscivorous charr consumes mostly smelt (Osmerus eperlanus) while burbot shows a more diverse behavior of its selection of fish species as a resource. The fact that these three species can coexist despite tough competition likely derives from the fact that Vätterns food web contains a lot of actors at the lower trophic levels.

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Röding, Anja [Verfasser], Claudia [Akademischer Betreuer] Büchel, and Gerhard [Akademischer Betreuer] Sandmann. "Strukturelle und funktionelle Analyse von Lichtsammelkomplexen in Nicotiana tabacum und Cyclotella meneghiniana / Anja Röding. Gutachter: Claudia Büchel ; Gerhard Sandmann. Betreuer: Claudia Büchel." Frankfurt am Main : Univ.-Bibliothek Frankfurt am Main, 2014. http://d-nb.info/1046889036/34.

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Schultz, Anna-Sara. "Upptag av fosfor, dioxiner och DL-PCB i sjön Vättern : En studie över fritidsfisket och det kommersiella fisket av signalkräfta, röding och sik." Thesis, Högskolan i Skövde, Institutionen för biovetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19017.

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During the industrialization period in Sweden, the lake Vättern has been exposed to many different types of trials, in some cases it has caused damage to the lake. Emissions of various substances have affected the aquatic life directly and in the long term also man. The anthropogenic disturbances to which Vättern has been exposed have left an impression on many different levels that still matter today. Understanding what quantity and sources contribute to the amount of supplementation and the amount of loss becomes important in order to better care for Vättern. The aim of the project is to try to describe the loss of the element phosphorus and the environmental toxins: dioxins and dl-PCBs through specific fishing for signal crayfish, char and whitefish in Vättern. A historical basis for fish catches in Vättern has been used together with a compilation of sample data on phosphorus content, dioxin concentration and dl-PCB concentration in the organisms. By combining catch data with the data on substance levels in the organisms, an image is obtained of the annual extraction of these substances via fishing. The results of the project can be used against future catch data from Vättern in order to obtain a continued overview of loss of phosphorus, dioxins and dl-PCBs from the lake through fishing. However, the results only show that the loss of phosphorus through fishing has an extremely small impact on the total amount in the lake. It is not possible to say whether the result over the total loss of dioxins fished and dl-PCBs is of great or little importance to the total amount in the lake due to lack of data. Finally, a discussion regarding a proposal for a future choice of method that can be implemented to enable a broader basis for future projects.

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Endres, Sarah [Verfasser], Tina [Akademischer Betreuer] [Gutachter] Rödig, and Ralf [Gutachter] Bürgers. "Antibakterielle Wirksamkeit der photodynamischen Therapie bei verschiedenen Insertionstiefen einer LED-Lichtquelle anhand eines Enterococcus faecalis-Biofilm-Modells / Sarah Endres ; Gutachter: Tina Rödig, Ralf Bürgers ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1139170600/34.

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Koberg, Carolina [Verfasser], Tina [Akademischer Betreuer] Rödig, Tina [Gutachter] Rödig, and Matthias [Gutachter] Rödiger. "Effektivität schall- und ultraschallaktivierter Wurzelkanalspültechniken zur Entfernung von Debris aus dem Isthmus unterer Molaren - Eine Mikro-CT-Studie / Carolina Koberg ; Gutachter: Tina Rödig, Matthias Rödiger ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/120715346X/34.

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Wagner, Johanna [Verfasser], Tina [Akademischer Betreuer] Rödig, Tina [Gutachter] Rödig, and Wolfram [Gutachter] Hahn. "Effizienz von ProTaper-Universal-Retreatment-Instrumenten für die Entfernung thermoplastischer Guttapercha aus gekrümmten Wurzelkanälen - Eine Mikro-CT-Studie / Johanna Wagner ; Gutachter: Tina Rödig, Wolfram Hahn ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1200209109/34.

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Müller, Christine [Verfasser], Tina [Akademischer Betreuer] Rödig, Tina [Gutachter] Rödig, Sven Pd [Gutachter] Rinke, and Rainer [Gutachter] Mausberg. "Einfluss des Feuchtigkeitsgehalts des Wurzelkanaldentins auf die Entstehung und den Nachweis von Mikrorissen - Eine Mikro-Computertomografie-Studie / Christine Müller ; Gutachter: Tina Rödig, Sven Pd Rinke, Rainer Mausberg ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1213096235/34.

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Hoffmann, Carolin Yvonne [Verfasser], Tina [Akademischer Betreuer] Rödig, Ralf [Akademischer Betreuer] Bürgers, and Rainer [Akademischer Betreuer] Mausberg. "In-vitro-Analyse der antimikrobiellen Effektivität von Octenidol, Natriumhypochlorit und Chlorhexidin gegen Enterococcus faecalis anhand eines intrakanalären Biofilm-Modells / Carolin Yvonne Hoffmann. Betreuer: Tina Rödig. Gutachter: Tina Rödig ; Ralf Bürgers ; Rainer Mausberg." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1085592375/34.

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Klotz-Rödig, Erika [Verfasser], and Dan [Akademischer Betreuer] Rujescu. "Eine Assoziationsstudie zum DKK3-Gen und der Schizophrenie / Erika Klotz-Rödig. Betreuer: Dan Rujescu." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1073825752/34.

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Eberl, Monika Diana [Verfasser], Tina [Akademischer Betreuer] Rödig, Tina [Gutachter] Rödig, and Sabine [Gutachter] Sennhenn-Kirchner. "Vergleich der antibakteriellen Effektivität vier unterschiedlicher Techniken zur Aktivierung der Wurzelkanalspülung (Hand, Ultraschall, RinsEndo®, EndoVac®) auf Enterococcus faecalis anhand eines Wurzelkanal-Biofilm-Modells / Monika Diana Eberl ; Gutachter: Tina Rödig, Sabine Sennhenn-Kirchner ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1153606968/34.

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Staemmler, Kai [Verfasser], Tina [Akademischer Betreuer] Rödig, Michael [Akademischer Betreuer] Hülsmann, Wolfgang [Akademischer Betreuer] Engel, and Patricia [Akademischer Betreuer] Virsik-köpp. "Vergleichende Untersuchung zur Applikation von Kalziumhydroxideinlagen / Kai Staemmler. Gutachter: Michael Hülsmann ; Wolfgang Engel ; Patricia Virsik-Köpp. Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1042779589/34.

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Åkerström, Per. "Utan rödvin och körsång är livet inte värt att leva : Kören i människan." Thesis, Linköping University, Department of Social Anthropology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8118.

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People have different hobbies. The people we are going to meet here share the same interest - choir singing. Singing together in different choirs is their hobby (leisure time interest).

What brings them together is the singing, getting an opportunity to sing together with people they otherwise would not meet. In this essay you will learn some of the reasons behind the fact that choir singing is a big movement in Sweden (reasons behind choir singing having a great number of practitioners). You will get a direct link to the informants, without having to read answers that have been tampered with. The choir singers who participate will speak directly to you.

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Seidel, Miriam [Verfasser], Tina [Akademischer Betreuer] Rödig, Sabine [Gutachter] Sennhenn-Kirchner, and Margarete [Gutachter] Schön. "Formkongruenzen zwischen Ein-Feilen-NiTi-Systemen und korrespondierenden Guttaperchastiften / Miriam Seidel ; Gutachter: Sabine Sennhenn-Kirchner, Margarete Schön ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1181427339/34.

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Jensch, Claudia [Verfasser], Michael [Akademischer Betreuer] Knösel, Tina [Akademischer Betreuer] Rödig, and Patricia [Akademischer Betreuer] Virsik-köpp. "Effizienz niedrig- und hochkonzentrierter Fluoridpräparate zur Erosionsprophylaxe am humanen Schmelz / Claudia Jensch. Gutachter: Tina Rödig ; Patricia Virsik-köpp. Betreuer: Michael Knösel." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2013. http://d-nb.info/1044768266/34.

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Bozkurt, Meral [Verfasser], Tina [Akademischer Betreuer] Rödig, Michael [Akademischer Betreuer] Hülsmann, Wolfram [Akademischer Betreuer] Hahn, and Patricia [Akademischer Betreuer] Virsik-köpp. "Vergleichende Studie zur Entfernung von Debris mit unterschiedlichen Spültechniken / Meral Bozkurt. Gutachter: Michael Hülsmann ; Wolfram Hahn ; Patricia Virsik-Köpp. Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1043997156/34.

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Zimmermann, Felix [Verfasser], Tina [Akademischer Betreuer] Rödig, Sabine [Gutachter] Sennhenn-kirchner, and Martin [Gutachter] Oppermann. "Antibakterielle Wirksamkeit schall- und ultraschallaktivierter Wurzelkanalspülungen auf einen Enterococcus faecalis-Biofilm / Felix Zimmermann ; Gutachter: Sabine Sennhenn-kirchner, Martin Oppermann ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/116814843X/34.

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Rödig, Jens [Verfasser], Simone [Akademischer Betreuer] Fulda, Volker [Akademischer Betreuer] Dötsch, Volker [Gutachter] Dötsch, and Simone [Gutachter] Fulda. "Unraveling the functional relevance of the Ubiquitin-specific peptidase 22 for necroptotic cell death / Jens Rödig ; Gutachter: Volker Dötsch, Simone Fulda ; Simone Fulda, Volker Dötsch." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2021. http://d-nb.info/1238143741/34.

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Rödig, Jana Verena [Verfasser], and Udo [Akademischer Betreuer] Reichl. "Impact of cultivation conditions on N-glycosylation of influenza A virus hemagglutinin, on quasispecies composition, and on immunogenicity of virus preparations / Jana Verena Rödig. Betreuer: Udo Reichl." Magdeburg : Universitätsbibliothek, 2014. http://d-nb.info/1058913522/34.

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Kupis, Jolantha Verfasser], Tina [Akademischer Betreuer] Rödig, Michael [Akademischer Betreuer] Hülsmann, and Wilfried [Akademischer Betreuer] [Engelke. "In-vitro-Vergleich zweier verschiedener Techniken zur Revision von Wurzelkanalfüllungen in gekrümmten Wurzelkanälen : eine Micro-Computertomografie-Studie / Jolantha Kupis. Gutachter: Michael Hülsmann ; Wilfried Engelke. Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1042531021/34.

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Reicherts, Pamela [Verfasser], Tina [Akademischer Betreuer] Rödig, Sven [Gutachter] Rinke, and Margarete [Gutachter] Schön. "Effektivität von reziprok und rotierend arbeitenden Nickel-Titan-Instrumenten zur Revisionsbehandlung an gekrümmten Molaren - Eine Mikro-Computertomografie-Studie - / Pamela Reicherts ; Gutachter: Sven Rinke, Margarete Schön ; Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1188464787/34.

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Rödig, Heiko [Verfasser], Rolf [Akademischer Betreuer] Marschalek, Rolf [Gutachter] Marschalek, and Josef [Gutachter] Pfeilschifter. "Regulation of inflammation and autophagy: Role of CD14 in biglycan-mediated sterile inflammation and impact of ABIN-1 on selective autophagy / Heiko Rödig ; Gutachter: Rolf Marschalek, Josef Pfeilschifter ; Betreuer: Rolf Marschalek." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2020. http://d-nb.info/1216556806/34.

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Eckstein, Amely [Verfasser], Michael [Akademischer Betreuer] Knösel, and Tina [Akademischer Betreuer] Rödig. "Ausmaß und Beständigkeit der ästhetischen Verbesserung von Multibrackettherapie-induzierten White-Spot-Läsionen nach Icon-Infiltration : eine prospektive, randomisierte, splitmouth-kontrollierte klinische Studie / Amely Eckstein. Gutachter: Michael Knösel ; Tina Rödig. Betreuer: Michael Knösel." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1051132428/34.

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Özkan, Esen [Verfasser], Sabine [Akademischer Betreuer] Sennhenn-Kirchner, Tina [Gutachter] Rödig, and Thomas [Gutachter] Meyer. "Vorbereitung und Durchführung eines evaluativ begleiteten Lehrinhaltes Psychologie und Kommunikation am Zentrum Zahn-, Mund- und Kieferheilkunde der Medizinischen Fakultät der Universität Göttingen als Pilotprojekt / Esen Özkan ; Gutachter: Tina Rödig, Thomas Meyer ; Betreuer: Sabine Sennhenn-Kirchner." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1162697717/34.

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Hausdörfer, Tim [Verfasser], Tina [Akademischer Betreuer] Rödig, Michael [Akademischer Betreuer] Hülsmann, Karl Günter [Akademischer Betreuer] Wiese, and Nikolaus [Akademischer Betreuer] Gerstdorff. "Die Effizienz von D-RaCe- und ProTaper-Universal-Retreatment-Nickel-Titan-Instrumenten und Handfeilen bei der Entfernung von Guttapercha aus gekrümmten Wurzelkanälen : eine Micro-Computertomografie-Studie / Tim Hausdörfer. Gutachter: Michael Hülsmann ; Karl Günter Wiese ; Nikolaus Gerstdorff. Betreuer: Tina Rödig." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1042926840/34.

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Olofsson, Sven. "Till ömsesidig nytta : Entreprenörer, framgång och sociala relationer i centrala Jämtland ca. 1810-1850." Doctoral thesis, Uppsala universitet, Historiska institutionen, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-158684.

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The aim of this thesis is to analyse the mutual impact which social relations and entrepreneurship had in relation to the success of four actors in a rural area in northern Sweden at the beginning of the nineteenth century. Many Swedish scholars have studied the process of social differentiation, before the industrial revolution. However, we still know very little about the forces behind this process, why some peasant households became more successful than others, especially during the first half of the nineteenth century when the economic differences were increasing. To grasp this process, the notion of social position has been used as a tool to grade the population on a scale from low- to high-ranked households in an economic and political sense. The fact that households were more or less successful turns our attention to the ability among individuals and households to change their social position. A theoretical concept chosen to investigate such change is the notion of entrepreneur, which implies a focus on the actor working for personal profit in a changing economic world. The main question has been how important social relations connected to entrepreneurship are in order to promote success among peasant households in the pre-industrial society. The empirical investigation has been conducted on two different levels. The first level is a structural study analysing the physical landscape of the court district of Rödön, the economic stratification and the political activity of the population in the area and, finally, their economic behaviours as peasants and rural businessmen. The second is a qualitative study emphasising on four individual actors: the businessman Per Wikström in the town of Östersund and three of the most successful peasant households in the region. The four case studies reveal that the rural elite had a pragmatic and dynamic approach to choosing social relations outside the family. Many acquaintances grew persistent and embedded in family or kinship relations, whereas others were short-lived or sacrificed for a calculated economic gain.

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Furtado, Miguel Aguiar 1991. "As lapas (Patella aspera Röding, 1798) como habitat de macroalgas." Master's thesis, 2013. http://hdl.handle.net/10451/9824.

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Tese de mestradoBiologia (Ecologia Marinha)Universidade de Lisboa, Faculdade de Ciências, 2013
Embora as lapas possam controlar a distribuição e abundância de algas e outros organismos, as suas conchas podem oferecer um substrato disponível e um refúgio para o estabelecimento de diversas espécies, especialmente em ambientes onde a competição por espaço é elevada, como é o caso dos Açores. Este trabalho foi o primeiro a identificar o epibiota e a caracterizar a sua respectiva percentagem de cobertura nas conchas da lapa Patella aspera nos Açores testando o número de taxa presentes e a sua percentagem de cobertura em função do tamanho da concha, bem como a composição do epibiota em função da localização do basibionte nos diferentes grupos do arquipélago (separados por centenas de quilómetros), nas diferentes ilhas de cada grupo (separadas por dezenas de quilómetros) e entre locais da mesma ilha e grupo (separados por quilómetros). Foram colectados 707 indivíduos de P. aspera em dois locais de cada uma das nove ilhas do arquipélago dos Açores nos meses de verão (Junho a Setembro) de dois anos consecutivos. As conchas foram medidas, os epibiontes presentes foram identificados e quantificados ao nível da espécie enquanto, correlações testaram a riqueza e a percentagem de cobertura do epibiota em função do tamanho do basibionte e análises de desenho hierárquico avaliaram e testaram os comprimentos das conchas e os padrões da composição do epibota entre as diferentes escalas consideradas. O comprimento das conchas apresentou variabilidade e diferenças significativas entre as diferentes ilhas do mesmo grupo (p < 0,05) e entre locais dentro da mesma ilha e grupo (p < 0,001), mas não entre grupos (p > 0,05). No total, identificaram-se 191 taxa, tendo-se verificado uma clara dominância de epibiontes algais (186 taxa) face à componente animal (5 taxa), sendo que dentro das algas a maior representatividade coube às rodófitas (112 taxa). No global, a crosta vermelha Lithothamnion apresentou o maior nível de ocorrência (54,17 %), seguindo-se taxa como Gelidium (41,30 %), Ceramium rubrum (38,47 %), Jania (35,50 %) e Polysiphonia denudata (33,09 %). O número de taxa de epibiontes, tal como a percentagem da sua cobertura demonstraram-se positivamente relacionados com o comprimento da concha do basibionte. A composição do epibiota variou significativamente entre as ilhas do mesmo grupo (p < 0,001) e entre os locais dentro da mesma ilha e grupo (p < 0,001), mas não entre grupos (p > 0,05). As estimativas da variância mostraram um padrão de aumento da variação com a diminuição da escala espacial. O epibiota identificado parece reflectir o ambiente circundante às conchas enquanto o número de taxa de epibiontes e a percentagem da sua cobertura pareceram estar relacionados com o aumento da área colonizável e com o aumento do tempo de exposição das conchas. A composição do epibiota parece ser influenciada por factores a operar à escala das ilhas (idades e padrões de recrutamento diferentes entre as ilhas) e locais (processos físicos e biológicos intrínsecos), mas não por factores à escala dos grupos visto as semelhanças de clima e em condições oceanográficas ao longo de todo o arquipélago. Factores antropogénicos como a sobre-exploração do basibionte em estudo parecem ser um factor que afecta ambas a escala das ilhas como locais. Este ainda pode reflectir a variabilidade e as diferenças encontradas relativamente aos comprimentos das conchas entre ilhas dentro do mesmo grupo e locais dentro da mesma ilha e grupo. No global, este estudo revela que as conchas de P. aspera, uma espécie sobre-explorada nos Açores, sustentam uma rica comunidade de algas e alguns invertebrados, amplificando o seu papel ecológico e o fenómeno da epibiose como alternativa viável de sobrevivência.
Although limpets can control the distribution and abundance of algae and other organisms, their shells can offer available substrata and a refuge for the establishment of several species, especially in environments where competition for space is high, such as the case of the Azores. This work was the first to identify the epibiota and to characterize the percentage of their coverage in the shells of the limpet Patella aspera, testing the number of present taxa and coverage depending on the shell size, and also their composition depending on the location of the basibiont in different groups of the archipelago (separated by hundreds of kilometers), on the islands of each group (separated by tens of kilometers) and between locations on the same island and group (separated by kilometers). A total of 707 individuals of P. aspera was collected from two locations in each of the nine islands of the Azores in the summer months (June to September) of two consecutive years. The shells were measured, the epibionts present were identified and quantified at species level while, correlations tested the number of taxa and percentage cover of epibiota depending on the shell size and a hierarchical analysis were used to evaluate and test the shell size and the epibota composition patterns among the different scales considered. The shell size presented variability and significant differences among the different islands within the same group (p < 0.05) and among locations within the same island and group (p < 0.001), but not among groups (p > 0.05). In total, 191 taxa were identified showing a clear dominance of algal epibionts (186 taxa) compared with the animal component (5 taxa), and within algae the most representative were for Rhodophyta (112 taxa). Overall, the red crust Lithothamnion had the highest level of occurrence (54.17 %), followed by Gelidium (41.30 %), Ceramium rubrum (38.47 %), Jania (35.50 %), and Polysiphonia denudata (33.09 %). The number of epibionts taxa and the cover percentage were positively related with the size of basibiont shell. The composition of the epibiota varied significantly among islands within the same group (p < 0.001) and among locations within the same island and group (p < 0.001), but not among groups (p > 0.05). The estimates of variance showed a pattern of variation increasing with the decrease of the spatial scale. The epibiota identified seems to reflect the surrounding environment while the number of taxa and their cover percentage appeared to be related with the increased available area for settlement and with increasing time of exposure of the shells. The composition of the epibiota appears to be influenced by the processes operating at scales of the islands (different ages and recruitment patterns among the islands) and local (intrinsic physical and biological processes), but not from processes at scale of the groups probably due to the similarities in climate and oceanographic conditions along the archipelago. Anthropogenic factors such as overexploitation of the studied basibiont appear to be a factor that affects both the scale of the islands and locations. This also may reflect variability and differences in relation of the shells size among the islands within the same group, and locations within the same island and group. This study shows that the shells of P. aspera, an over-exploited species in the Azores, support a very rich community of algae and some invertebrates, amplifying their ecological role and the phenomenon of epibiose as a viable alternative for survival.

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37

"Molecular phylogenetics and population genetics of pearl oysters in pinctada Röding, 1798." Thesis, 2005. http://library.cuhk.edu.hk/record=b6074094.

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Pearl oysters of the genus Pinctada include some economically important species. The taxonomy of some of the species is problematic. Phylogenetic relationship of the species in the genus is also poorly studied. In the present study, phylogenetic relationships of P. chemnitzi, P. fucata, P. margaritifera, P. maxima, P. nigra, P. radiata (from China), P. fucata martensii (from Japan), P. albina and P. imbricata (from Australia) were studied with Pteria penguin as an outgroup, and genetic variation of Chinese P. fucata, Japanese P. fucata martensii and Australian P. imbricata populations were investigated (1) to address the taxonomic confusion and phylogeny of pearl oysters, (2) to understand the genetic connections between the Chinese P. fucata, Japanese P. fucata martensii and Australian P. imbricata in west Pacific and (3) to provide information for the genetic improvement program initiated in China.
Since P. fucata, P. fucata martensii and P. imbricata are synonymous, to study the genetic differentiation and genetic variation of such widely distributed populations is helpful in understanding their genetic connections. For this purpose, five populations, three from China (Daya Bay, Sanya Bay and Beibu Bay), one from Japan (Mie Prefecture) and one from Australia (Port Stephens) were studied using AFLP technique. Three primer pairs generated 184 loci among which 91.8-97.3% is polymorphic. An overall genetic among populations and an average of 0.37 within populations (ranging from 0.35 in Japanese population to 0.39 in Beibu Bay population) were observed. Genetic differentiation among the five populations is low but significant as indicated by pairwise GST (0.0079-0.0404). AMOVA further shows that differentiation is significant among the five populations but is not significant at a broader geographical scale, among the three groups of Chinese. Japanese and Australian populations or among the two groups of Australian and north Pacific populations. The low level of genetic differentiation indicated that P. fucata populations in the west Pacific are genetically linked. Among the five populations, the Australian one is more differentiated from the others, based on both pairwise AMOVA and GST analyses, and is genetically isolated by distance as indicated by Mantel test. However, genetic differences among the three Chinese populations are not correlated with the geographic distances, suggesting that Hainan Island and Leizhou Peninsula may act as barriers blocking gene flow.
The above three wild Chinese populations in southern China were compared with the three adjacent cultured populations using AFLP markers. Three pairs of primers generated 184 loci among 179 individuals in populations from Beibu Bay, Daya Bay and Sanya Bay. A high level of genetic diversity, ranging from 0.363 in a wild population in Sanya Bay to 0.388 in a wild population in Beibu Bay, was observed within both wild and cultured populations, indicating an absence of strong bottleneck effects in the history of cultured P. fucata populations. Yet cultured populations in Sanya Bay and Beibu Bay had more fixed loci than the corresponding wild populations. Genetic differentiation in most pairwise comparisons of populations was significant. AMOVA indicated that genetic variation among populations were very low (1.77%) though significant, while more than 98% variation resided among individuals within population. These findings provide no evidence to show that hatchery practice of pearl oyster in China to date has significantly affected the genetic diversity of the cultured populations, and suggest that all populations are competent for selection. Yet the significant genetic differentiation among populations implies that any translocation of individuals for genetic improvement program should be managed with caution for the preservation of genetic diversity in natural populations.
The internal transcribed spacers (ITS1 and ITS2) of nuclear ribosomal DNA were compared among the above nine taxa, based on sequences determined by the present study and those available from Genl3ank. The phylogenetic analysis indicates that the pearl oysters studied constitute three clades: clade I with the small oysters P. fucata, P. fucata martensii and P. imbricata, clade II with P. albina, P. nigra, P. chemnitzi and P. radiata, and clade III and clade III with the big pearl oysters P. margaritifera and P. maxima forming the basal clade. Clade II is made up two subclades: clade IIA consisting of P. albina and P. nigra and clade IIB consisting of P. chemnitzi and P. radiata. The topology of the phylogenetic tree and substitution pattern of ITS sequences suggest that P. margaritifera and P. maxima are primitive species and P. chemnitzi is a recent species. The genetic divergences between clades ranged from 28% to 76.5%, and between subclades, 8.7-10.2%. In clade I, the interspecific genetic divergences ranged from 0.6% to 1.4%, and overlapped with interspecific divergences (0.6-1.1%), indicating that P. fucata, P. fucata martensii and P. imbricata may be conspecific. Based on amplified fragment length polymorphism (AFLP) markers and ITS sequences from more individuals, analyses of the populations of these three taxa also support the conclusion that Chinese P. fucata, Japanese P. fucata martensii and Australian P. imbricata are the same species, with P. fucata being the correct name. The genetic divergence between P. albina and P. nigra was also very low (1.2%), suggesting that they may represent two subspecies that can only be distinguished by shell color. The genetic divergences between P. maxima and P. margaritifera, and between clade IIA and clade IIB ranged from 8.3% to 10.2%, suggesting that they are closely related, respectively. The ITS1 sequence of P. radiata from GenBank is almost identical to that of P. chemnitzi determined in the present study, suggesting that the specimen used for the P. radiata sequence was possibly misidentified.
Yu Dahui.
"August 2005."
Adviser: Ka Hou Chu.
Source: Dissertation Abstracts International, Volume: 67-11, Section: B, page: 6125.
Thesis (Ph.D.)--Chinese University of Hong Kong, 2005.
Includes bibliographical references (p. 100-124).
Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web.
Abstracts in English and Chinese.
School code: 1307.

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Rödling, Steffen [Verfasser]. "Einfluss von Überlasten auf das Rissausbreitungsverhalten von Aluminiumlegierungen aus dem Bereich der Luft- und Raumfahrt / Steffen Rödling." 2003. http://d-nb.info/969596464/34.

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Rödig, Stefan [Verfasser]. "Die Validität der Duplexsonographie zur spezifischen Rezidivdiagnostik bei Varikosis-Patienten nach Krossektomie / vorgelegt von Stefan Rödig." 2009. http://d-nb.info/1008562947/34.

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Rödig, Mirko [Verfasser]. "Behandlung aktinischer Keratosen mit Birkenoleogel : eine klinische Phase-2a-Studie mit histologischen Untersuchungen / vorgelegt von Mirko Rödig." 2009. http://d-nb.info/992484626/34.

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