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Dissertations / Theses on the topic 'Thymallus thymallus'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Lundberg, Fredrik. "Effekter av korttidsreglering och habitatrestaurering på simaktivitet hos harr (Thymallus thymallus)." Thesis, Karlstads universitet, Avdelningen för biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-77702.

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Sammanfattning Användningen av korttidsreglering av vattenkraftverk kommer troligen öka då det är kostnadseffektivt och efterfrågan av förnybar energi är hög. Jag undersökte effekten av habitatkomplexitet och flödesändringar på simaktiviteten hos harr (Thymallus thymallus) i experimentella vattenrännor. Två olika habitat användes, ett beståendes av bara en grusbotten och en med större stenar placerade på grusbotten. I experimentet användes en behandling där flödet var stabilt och en där flödet varierade. Det fanns en signifikant interaktionseffekt mellan en ändring i flödet och habitat, som vi

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2

Hanfland, Sebastian. "Erfolgskontrolle von praxisüblichen Besatzmassnahmen mit Äschen (Thymallus thymallus) in ausgewählten südbayerischen Fliessgewässern." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965587711.

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3

Hübner, Dirk. "Die Ablaich- und Interstitialphase der Äsche (Thymallus thymallus L.) Grundlagen und Auswirkungen anthropogener Belastungen /." [S.l. : s.n.], 2003. http://archiv.ub.uni-marburg.de/diss/z2004/0286/.

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4

Karlsson, Susanna. "HARR (THYMALLUS THYMALLUS) I VÄTTERBÄCKARNA : En studie om samband mellan bottenfauna och harrens förekomst." Thesis, Högskolan i Skövde, Institutionen för vård och natur, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8222.

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5

Huml, Jana Vanessa. "Assessing adaptive genetic variation for conservation and management of the European grayling (Thymallus thymallus)." Thesis, Manchester Metropolitan University, 2017. http://e-space.mmu.ac.uk/619768/.

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In this PhD, functional genetic variation of European grayling (Thymallus thymallus) is assessed to inform conservation and management of the species. This study is the first to characterize immune variation at the Major Histocompatibility complex (MHC) in grayling. The MHC is a marker of high ecological relevance, because of the strong association between immunity and fitness. Taking advantage of advances in sequencing technology, an analytical pipeline optimized for high-throughput, efficient and accurate genotyping of multi-gene families in non-model species is presented. Immune genetic var

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6

Ajanovic, Nedzad. "Grayling (Thymallus thymallus) hatchery in the municipality of Bosanska Krupa in northwestern Bosnia and Herzegovina, a sustainable development pilot project." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ42336.pdf.

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7

Sempeski, Philippe. "Sélection et utilisation de l'habitat par les jeunes stades de poissons d'eau courante : le modèle ombre commun (Thymallus thymallus L.)." Lyon 1, 1994. http://www.theses.fr/1994LYO10324.

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Une demarche eco-ethologique a servi de base a l'etude de la selection et de l'utilisation de l'habitat par les jeunes stades d'ombre commun (thymallus thymallus). Des campagnes de reperage, realises en milieu naturel sur plusieurs rivieres francaises, depuis la berge ou en plongee, de jour comme de nuit, associees a des descriptions de l'habitat physique (vitesse du courant, hauteur d'eau, granulometrie du substrat, forces de cisaillement pres du fond) ont permis la caracterisation des habitats successivement selectionnes par les ombrets. Qu'il s'agisse des sites de ponte choisis par les geni

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8

Berger, Cora Agnes [Verfasser]. "Salmo trutta und Thymallus thymallus in der Wupper - molekularbiologischer Nachweis von Saprolegnia spp. sowie Berechnungen zu Alter und Längenwachstum / Cora Agnes Berger." Wuppertal : Universitätsbibliothek Wuppertal, 2017. http://d-nb.info/1141193868/34.

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9

Bardonnet, Agnès. "Occupation de l'espace par les jeunes stades de salmonidés : vie sous graviers, émergence et dévalaison chez l'ombre commun, Thymallus thymallus, L. 1758." Lyon 1, 1989. http://www.theses.fr/1989LYO10198.

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Les habitats occupés par les jeunes stades de salmonidés se modifient fortement et rapidement au cours des premiers mois de vie. L'occupation de l'espace et les rythmes d'activité qui caractérisent les changements d'habitat ont été étudiés chez l'ombre commun Tthymallus thymallus). Il est apparu qu'un certain nombre de stratégies migratrices isole ce salmonidé de ponte printannière des autres salmonidés rhéophiles. Après la phase de résorption de la vésicule vitelline qui se réalise dans le milieu interstitiel, les alevins entrent dans le milieu d'eau libre avec un rythme d'émergence centré su

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10

Soewardi, Kadarwan. "Caractérisation des populations de Thymallus thymallus L. (poissons, salmonidés) et de Rutilus rutilus L. (poissons, cyprinidés) dans le réseau fluvial du Rhône : approche par l'étude du polymorphisme enzymatique." Lyon 1, 1988. http://www.theses.fr/1988LYO10110.

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11

Soewardi, Kadarwan. "Caractérisation des populations de Thymallus thymallus L. (poissons, salmonidés) et de Rutilus rutilus L. (poissons, cyprinidés) dans le réseau fluvial du Rhône approche par l'étude du polymorphisme enzymatique /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37618631f.

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12

Koskinen, Mikko T. "Genetic studies of population history and contemporary microevolution in grayling (Thymallus : Salmonidae)." Helsinki : University of Helsinki, 2002. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/koskinen/.

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13

Persat, Henri. "De la biologie des populations de l'ombre commun Thymallus thymallus (L. 1758) à la dynamique des communautés dans un hydrosystème fluvial aménagé, le Haut-Rhône français : éléments pour un changement d'échelles." Lyon 1, 1988. http://www.theses.fr/1988LYO10025.

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14

Persat, Henri. "De la biologie des populations de l'Ombre commun Thymallus thymallus (L.1758) à la dynamique des communautés dans un hydrosystème fluvial aménagé, le Haut-Rhône français éléments pour un changement d'échelles /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376175328.

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15

Steed, Amber Christine. "Population Viability of Arctic Grayling (Thymallus arcticus) in the Gibbon River, Yellowstone National Park." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/steed/SteedA1207.pdf.

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The fluvial Arctic grayling Thymallus arcticus is restricted to less than 5% of its native range in the contiguous United States and was listed as Category 3 under the Endangered Species Act (ESA) until a 2007 ruling removed its protection. Fluvial grayling were thought to be restricted to the Big Hole River, Montana, where abundances were declining. Although fluvial grayling of the lower Gibbon River, Yellowstone National Park (YNP) were considered extirpated by 1935, anglers frequently reported catching grayling throughout the river since 1980. My goal was to determine if a viable population

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16

Stanislawski, Slawomir S. "Fall and winter movements of Arctic grayling, Thymallus arcticus, Pallas, in the Little Smoky River, Alberta." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22676.pdf.

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17

Hanfland, Sebastian [Verfasser]. "Erfolgskontrolle von praxisüblichen Besatzmaßnahmen mit Äschen (Thymallus thymallus) in ausgewählten südbayerischen Fließgewässern / Sebastian Hanfland." 2002. http://d-nb.info/965587711/34.

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18

NEBESKÝ, Václav. "Možnosti zvyšování produkce kvalitních násad lipana podhorního (Thymallus thymallus L.) pro zarybňování volných vod." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-46799.

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European grayling (Thymallus thymallus L.) is important and ancestral kind of fish in Czech Republic. Today number of grayling in open waters is decreasing. It caused many reasons. Mainly increasing fishing pressure, unfavourable regulation of streams, water pollutinon, raising occurrence of predators etc. That is why is necessarily devote care to this problem. Main goals of this work were optimalization of technologies to decrease post-spawning mortality of grayling spawners. Optimalization of technologies for breedig offspring of European grayling (Thymallus thymallus L.). Use artificially p

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19

HAVELKA, Miloš. "Genetická diverzita lipana podhorního (Thymallus thymallus) a její vztah ke stavu jeho populací v ČR." Master's thesis, 2009. http://www.nusl.cz/ntk/nusl-51255.

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Goal of this Thesis is the comparison of the Grayling˘s genetic diversity. The complete mitochondrial DNA (mtDNA) control region (1083 base pairs) and gene for cytochrom B (1076 base pairs) were sequenced in 147 European grayling (Thymallus thymallus), from 21 populations in Czech Republic, Slovakia and Bosnia. In samples, 17 haplotypes were detected with average haplotype diversity Hd = 0,5480 and genic differentiation (FST) from 0,001 to the 0.9341. The most common haplotype TH1 was detected in 92 samples. An inferred intraspecific phylogenetic tree revealed three well-separated clades. One

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20

Gum, Bernhard [Verfasser]. "Genetic characterisation of European grayling populations (Thymallus thymallus L.) : implications for conversation and managment / Bernhard Gum." 2007. http://d-nb.info/985417560/34.

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21

CHYTRÝ, Martin. "Věk a růst lipana podhorního (Thymallus thymallus L.) původem z různých lokalit - hodnocení na základě analýzy šupin." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-252245.

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The main aim of this thesis is to evaluate and to compare the age and length growth of European grayling in selected watercourse in the South Bohemia (Blanice vodňanská, Volyňka, Teplá Vltava a Otava) and in Austria (the Traun River and the Salzach River), focusing on the watersources of the Teplá Vltava River and the Traun River. Possible rules adjustment of sport fishing can give reasons eventually to be done on the basis of results in order to protect and to strenghten natural populatin of grayling. 53 individuals (fish) were studied in total which were in observed localities fished from 20

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22

Hübner, Dirk [Verfasser]. "Die Ablaich- und Interstitialphase der Äsche (Thymallus thymallus L.) : Grundlagen und Auswirkungen anthropogener Belastungen / vorgelegt von Dirk Hübner." 2003. http://d-nb.info/973696052/34.

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23

RANDÁK, Tomáš. "Možnosti zvyšování produkce násad pstruha obecného (Salmo trutta m. fario L.)a lipana podhorního (Thymallus thymallus L.) pro zarybňování volných vod." Doctoral thesis, 2006. http://www.nusl.cz/ntk/nusl-45177.

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24

TUREK, Jan. "Adaptabilita uměle odchovaných násad pstruha obecného (Salmo trutta m. fario L.) a lipana podhorního (Thymallus thymallus L.) v podmínkách volných vod." Doctoral thesis, 2010. http://www.nusl.cz/ntk/nusl-54137.

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25

Lyach, Roman. "Potrava vydry říční (Lutra lutra) v závisloti na vysazení potoční formy pstruha obecného (Salmo trutta m. fario) a lipana podhorního (Thymallus thymallus)." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-332144.

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This study aimed to evaluate otter predation on stocked trout and grayling. The diet composition of piscivorous Eurasian otters (Lutra lutra) was studied on the stream Chotýšanka in central Bohemia using spraint (otter faeces) analysis during one winter period (90 days). Stocking took place mostly in the second half of 2005. Around 5000 hatchery-reared brown trouts (Salmo trutta m. fario) of size about 10 cm, 600 graylings (Thymallus thymallus) of the same size and 480 rainbow trouts (Oncorhynchus mykiss) of size about 30 cm were stocked into the stream. Spraints were collected in December 200

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26

ŠKEŘÍK, Jindřich. "Citlivost adultních ryb různých druhů k anestetiku hřebíčkový olej." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-47184.

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Nomenclature: Sensitivity to anesthetic clove oil different species of adult fish Sensitivity of breeding fishes of various species (Siberian sturgeon, Brook trout, Black carp- young breeding fishes) for anesthetic clove oil was probed by the tests performed at temperature in the period of stripping (apart from Brook trout and Black carp). The tests were carried out with 17 fish species- with cyprinids (Ide- golden form, Common dace, European Chub, Sneep, Barbel, Grass carp, Black carp, bighead carp), salmonids (Brown trout, Rainbow trout, Brook trout), thymallinae (Grayling), pikes (Northern

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27

Stamford, Michael D. "Mitochondrial and microsatellite DNA diversity throughout the range of a cold adapted freshwater salmonid : phylogeography, local population structure and conservation genetics of Arctic grayling (Thymallus arcticus) in North America." Thesis, 2002. http://hdl.handle.net/2429/12227.

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The distributions of most Holarctic freshwater fish species were severely altered and restricted during the many glaciation events that have occurred throughout the Pleistocene. Isolation of groups of fish into distinct glacial refugia provided the opportunity for genetic divergence during these periods of allopatry through genetic drift and novel selection pressures. In this thesis, I examined the signature of such isolation and postglacial range expansion in the Arctic grayling (Thymallus arcticus) by assaying mitochondrial and microsatellite (nuclear) DNA variation throughout the spec

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