Log in

Relevant bibliographies by topics / Batrachochytrium / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Batrachochytrium.

Dissertations / Theses on the topic 'Batrachochytrium'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Batrachochytrium.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Padgett-Flohr, Gretchen Elizabeth. "Batrachochytrium dendrobatidis in Central California." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/dissertations/310.

Full text

Abstract:

AN ABSTRACT OF THE DISSERTATION OF GRETCHEN ELIZABETH PADGETT-FLOHR for the Doctor of Philosophy degree in Zoology, presented on March 5, 2009 at Southern Illinois University of Carbondale. TITLE: BATRACHOCHYTRIUM DENDROBATIDIS IN CENTRAL CALIFORNIA AMPHIBIANS MAJOR PROFESSOR: Eric Schauber Amphibian chytridiomycosis has been identified as a disease responsible for the decline and extinction of many amphibian taxa world wide, but little research has been conducted on the disease in Mediterranean climates. To address this gap in the data I studied the amphibian assemblage present across a ~6,4

APA, Harvard, Vancouver, ISO, and other styles

2

Smith, Freya. "The epidemiology of the amphibian pathogen Batrachochytrium dendrobatidis in the UK." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/24154.

Full text

Abstract:

Batrachochytrium dendrobatidis (Bd) is a recently emerged multihost fungal pathogen, which has rapidly spread globally. It has been detected in 52 different countries, and in over 500 amphibian species. In susceptible hosts, it causes the disease chytridiomycosis. Although globally, Bd causes amphibian declines (and in some parts of the world, has resulted in a 40% loss of amphibian species), host responses are inconsistent and Bd appears able to coexist with some amphibian species or assemblages of species in a state of endemism. Batrachochytrium dendrobatidis was first detected in wild amphi

APA, Harvard, Vancouver, ISO, and other styles

3

Farrer, Rhys. "Comparative genomics and epidemiology of the amphibian-killing fungus Batrachochytrium dendrobatidis." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18317.

Full text

Abstract:

The primary aim of this thesis was to study the population structure and epidemiology of the fungal pathogen of amphibians, Batrachochytrium dendrobatidis (Bd). I have addressed these questions by collecting and isolating Bd from multiple infected host species. I have then extracted and sequenced whole nuclear and mitochondrial genomes for 50 isolates of Bd using the ABI SOLiD 3 and Illumina HiSeq 2000 platforms. The first aspect of the analysis was to tailor a new method for identifying variant sites amongst the isolates, as well as verifying the accuracy of the alignment and SNP-calling meth

APA, Harvard, Vancouver, ISO, and other styles

4

Bartkus, Casey John. "The occurrence of Batrachochytrium dendrobatidis in salamander populations of West Virginia." [Huntington, WV : Marshall University Libraries], 2009. http://www.marshall.edu/etd/descript.asp?ref=944.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Paula, Catia Dejuste de. "Patologia comparada de infecções selecionadas de anfíbios anuros de vida livre do bioma da Mata Atlântica: estudo prospectivo." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-19102012-154735/.

Full text

Abstract:

Os anfíbios apresentaram um severo declínio de suas populações nas últimas décadas. Dentre as diversas causas dos declínios estão as doenças infecciosas. O presente trabalho tem o objetivo de estudar a ocorrência de enfermidades selecionadas que podem acometer estes animais na Mata Atlântica brasileira, e, desta forma, contribuir para a melhor compreensão das conseqüências destas enfermidades para a conservação dos anfíbios em nosso meio. Foram coletados 120 animais da Estação Biológica da Boracéia e realizaram-se exames necroscópicos, histopatológicos, microbiológicos, parasitológicos e PCR c

APA, Harvard, Vancouver, ISO, and other styles

6

Korfel, Chelsea Anne. "Distribution and environmental correlates between amphibians and the fungal pathogen, Batrachochytrium dendrobatidis." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1350573649.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Brown, Jenise. "Net Effects of Batrachochytrium dendrobatidis (Bd) and Fungicides on Anurans Across Life Stages." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4643.

Full text

Abstract:

Amphibians are declining at alarming rates globally. Multiple factors contribute to these declines, including chemical contaminants and emergent diseases. In recent years, agrochemical use, especially fungicide applications, has increased considerably. Previous studies have demonstrated that these agrochemicals leave application sites and enter wetlands via runoff and have detrimental effects on non-target organisms. For example, exposure to contaminants can have multifarious effects on amphibians, such as reducing their ability to deal with a secondary stressor, such as disease. A pathogen th

APA, Harvard, Vancouver, ISO, and other styles

8

Bond, Christopher. "The effects of Batrachochytrium dendrobatidis and sub-lethal nitrate concentrations on Xenopus laevis." Thesis, Wichita State University, 2013. http://hdl.handle.net/10057/10626.

Full text

Abstract:

The pathogenic fungus Batrachochytrium dendrobatidus (Bd) is responsible for mass disruption of amphibian species and causes the disease known as chytridiomycosis which disrupts the amphibian skin resulting in high mortality rates (Pessier et al. 1999). There are limited studies of the internal and immune functions of frogs during Bd exposure exist and studies aimed at understanding the effects of Bd exposure combined with anthropogenic stressors such as nitrate are limited as well. The aim of this study was to test treatment combinations involving nitrate concentration (0, 40 and 80 mg/L) and

APA, Harvard, Vancouver, ISO, and other styles

9

Galeano, Sandra Patricia. "ENZOOTIC PATTERNS OF INFECTION BY BATRACHOCHYTRIUM DENDROBATIDIS IN POND BREEDING ANURANS IN CENTRAL AMERICA." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/62.

Full text

Abstract:

Batrachochytrium dendrobatidis (Bd) has contributed to population declines and extinction of amphibians worldwide. Disease-caused extinction is rare, but may occur where reservoirs exist or where transmission is independent of host density. Because some species persist after Bd epizootic events, they may act as potential reservoirs of the infection. I studied seasonal and elevational patterns of prevalence and intensity of Bd infection in eight pond-breeding species that persisted after an epizootic event at three low- and three mid-elevation ponds in Central America. I visited each pond t

APA, Harvard, Vancouver, ISO, and other styles

10

Talley, Brooke Lee. "Host-Pathogen Ecology: Effects of Species Ecology and Environmental Factors on the Intensity and Distribution of Disease Among Illinois Amphibians." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/dissertations/855.

Full text

Abstract:

The worldwide decline of amphibians is due to several interacting factors that vary in their involvement and severity according to species, geography, environment, and individual response (Wake and Vredenburg 2008; Gahl et al. 2011). One of those threats has caused population declines globally (Stuart et al. 2004), Batrachochytrium dendrobatidis (Bd), which is the fungal pathogen that causes chytridiomycosis in amphibians (Berger et al. 1998; Longcore et al. 1999). Bd's effects are not completely known since some areas of the world have been studied (e.g., Panama, Lips et al. 2006; United Stat

APA, Harvard, Vancouver, ISO, and other styles

11

Lambertini, Carolina 1987. "Variação fenotípica de Batrachochytrium dendrobatidis como preditora de infecção em anuros da Mata Atlântica." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314881.

Full text

Abstract:

Orientador: Luís Felipe de Toledo Ramos Pereira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-25T14:12:31Z (GMT). No. of bitstreams: 1 Lambertini_Carolina_M.pdf: 6513639 bytes, checksum: 76f60b46e28d803521c2f06db67818b3 (MD5) Previous issue date: 2014<br>Resumo: Os anfíbios são os animais mais ameaçados do planeta, tendo como fatores mais impactantes a perda de habitat e a quitridiomicose. Esta doença em anuros é causada pelo fungo Batrachochytrium dendrobatidis (Bd), que já foi registrado em todos os continentes e

APA, Harvard, Vancouver, ISO, and other styles

12

Clare, Frances Cherry. "Quantifying the impact of infection by Batrachochytrium dendrobatidis on montane populations of Alytes obstetricans." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/44274.

Full text

Abstract:

This thesis aims to assess the population-level risk posed by Batrachochytrium dendrobatidis (Bd), a pathogen responsible for worldwide declines and extinctions, to the amphibians of a series of infected Pyrenean Lakes. The principle focus was on the common midwife toad (Alytes obstetricans), which, in parts of its range has suffered population declines and even local extinction as a result of exposure to Bd. Infection severity thresholds may play an important role in the risk of decline a population faces, but such thresholds are only useful if individual-level infection estimates are accurat

APA, Harvard, Vancouver, ISO, and other styles

13

Galeano, Sandra P. "Enzootic patterns of infection by Batrachochytrium dendrobatidis in pond breeding anurans in Central America /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1885689751&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Ratzlaff, Kristina M. "Dynamics of Chytrid Fungus (Batrachochytrium Dendrobatidis) Infection in Amphibians in the Rincon Mountains and Tucson, Arizona." Thesis, The University of Arizona, 2012. http://hdl.handle.net/10150/228467.

Full text

Abstract:

The chytrid fungus Batrachochytrium dendrobatidis (Bd) has been implicated in amphibian declines around the world, including the southwestern United States. I studied patterns of Bd infection in Hyla arenicolor, Rana catesbeiana, and R. yavapaiensis in the Rincon Mountains and Tucson Basin in Arizona. Bd prevalence and infection intensity were location dependent in all species and R. yavapaiensis may be a reservoir of Bd for H. arenicolor, where they co-occurred. Treatment of a backyard population of R. yavapaiensis with itraconazole did not reduce winter frog mortality due to Bd. The leth

APA, Harvard, Vancouver, ISO, and other styles

15

Greenspan, Sasha Eden. "Establishment of Batrachochytrium dendrobatidis in Anuran Epidermis and Experimental Transmission from Bullfrogs to Wood Frogs." Fogler Library, University of Maine, 2011. http://www.library.umaine.edu/theses/pdf/GreenspanS2011.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Brem, Forrest. "Comparing Batrachochytrium dendrobatidis infection prevalence among habitats before, during, and after an epizootic in central Panama /." Available to subscribers only, 2006. http://proquest.umi.com/pqdweb?did=1240701491&sid=8&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Radik, Gabrielle A. "Assessing Risks of Amphibian Declines using Multiple Stressors." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1244474946.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

LaBumbard, Brandon. "FACTORS RELATED TO THE DISTRIBUTION AND PREVALENCE OF BATRACHOCYTRIUM DENDROBATIDIS IN THE KOSÑIPATA VALLEY OF THE PERUVIAN ANDES." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1836.

Full text

Abstract:

This thesis consists of three sections, all of which are linked to the ecology of infectious disease and the decline of amphibians caused by chytridiomycosis. This thesis represents a detailed analysis of factors that allow the amphibian chytrid fungus, Batrachochytrium dendrobatidis (Bd), to persist in the Peruvian Andes. Collectively, these three sections elaborate on the current knowledge of the disease, how it persists in an area, as well as recommendations for future disease mitigation. Chapter one is a review of environmental and biological factors that contribute to the persistence of

APA, Harvard, Vancouver, ISO, and other styles

19

Dejean, Tony. "Déclin et inventaire de la biodiversité : les maladies des amphibiens et la méthode de l'ADN environnemental." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV072.

Full text

Abstract:

Depuis plusieurs décennies, un déclin important de la biodiversité est observé à l'échelle mondiale. Les amphibiens constituent aujourd'hui le groupe le plus vulnérable sur la planète. Près d'un tiers des espèces recensées dans le monde est à ce jour menacé d'extinction. Dans le cadre de ce doctorat, nous nous sommes intéressés dans un premier temps à l'émergence d'une maladie infectieuse des amphibiens, la chytridiomycose, provoquée par le champignon pathogène Batrachochytrium dendrobatidis (Bd). Nous avons étudié la répartition actuelle de ce champignon en France, démontré son impact sur la

APA, Harvard, Vancouver, ISO, and other styles

20

Walker, Susan Frances. "Geographical patterns in the distribution of Batrachochytrium dendrobatidis and outbreaks of fatal chytridiomycosis in European amphibian populations." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478915.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Walker, Susan Frances. "Spatial patterns in the distribution of Batrachochytrium dendrobatidis and outbreaks of fatal chytridiomycosis in European amphibian properties." Thesis, University of London, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498408.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Wax, Noah David. "Comparative genomics of bacteria from amphibian skin associated with inhibition of an amphibian fungal pathogen Batrachochytrium dendrobatidis." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103961.

Full text

Abstract:

Chytridiomycosis is a fungal skin disease in amphibians that is primarily caused by Batrachochytrium dendrobatidis (Bd). We analyzed whole genome sequences of 40 bacterial isolates that had been previously cultured from the skin of four amphibian species from Virginia, USA, and tested for their ability to inhibit Bd growth via an in vitro challenge assay. These 40 isolates spanned 11 families and 13 genera. The aim of this study was to identify genomic differences among the amphibian skin bacterial isolates and generate hypotheses about possible differences that could contribute to variation i

APA, Harvard, Vancouver, ISO, and other styles

23

Rubio, Andrew Otto. "EFFECTS OF THE FUNGAL PATHOGEN BATRACHOCHYTRIUM DENDROBATIDIS ON THE TROPHIC ECOLOGY OF TADPOLES OF ANDEAN WATER FROGS." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2599.

Full text

Abstract:

Amphibian diversity has declined, in part, due to the infectious disease chytridiomycosis, caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd). Andean water frogs in the genus Telmatobius are particularly vulnerable to the disease and the genus has been extirpated from Ecuador and in Andean cloud forests, yet populations of species persist in the high Andes of Peru and Bolivia. The Alpaca Water Frog (Telmatobius intermedius), endemic to the Peruvian Andes, can be found infected with Bd. Alpaca Water Frogs inhabit high elevation open canopy freshwater systems. My overall goal was

APA, Harvard, Vancouver, ISO, and other styles

24

Kilburn, Vanessa. "Persistence and prevalence of the enzootic chytrid fungus, «Batrachochytrium dendrobatidis», in relation to amphibian population decline in Panama." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32555.

Full text

Abstract:

The pathogenic chytrid fungus, Batrachochytrium dendrobatidis, causes population decline and extinction of numerous species of tropical, principally montane, amphibians. Is B. dendrobatidis an enzootic pathogen emerging as a disease, or rather a novel invasive pathogen infecting naïve amphibians? Are only high-elevation amphibians susceptible to the pathogen? If the chytrid is enzootic, then it may be in the environment before or after epidemic decline and may infect both montane and lowland amphibians as

APA, Harvard, Vancouver, ISO, and other styles

25

Spaulding, Sarah H. "AN INVESTIGATION INTO THE OCCURRENCE OF BATRACHOCHYTRIUM DENDROBATIDIS INFECTION IN PLETHODONTID SALAMANDER COMMUNITIES OF ROBINSON FOREST." UKnowledge, 2015. http://uknowledge.uky.edu/forestry_etds/22.

Full text

Abstract:

Environmental and anthropogenic stressors negatively affect amphibians in a variety of ways, often increasing their vulnerability to pathogen infection and mortality. Sampling for the pathogenic fungus Batrachochytrium dendrobatidis (Bd) was conducted in order to: 1) determine the presence of chytrid infection in stream-associated plethodontid salamanders of southeastern Kentucky, and 2) evaluate differences in infection intensity between salamanders residing in intact forest streams, timber-harvested streams, and surface-mined streams. During 14 sampling sessions occurring between March, Apri

APA, Harvard, Vancouver, ISO, and other styles

26

Minting, Peter. "An investigation into the effects of Batrachochytrium dendrobatidis (Bd) on natterjack toad (Bufo calamita) populations in the UK." Thesis, University of Sussex, 2012. http://sro.sussex.ac.uk/id/eprint/41270/.

Full text

Abstract:

The chytridiomycete Batrachochytrium dendrobatidis (Bd) is a parasite which has been blamed for amphibian declines across the world. This study was designed to investigate the effects of Bd on natterjack toads (Bufo calamita), following the discovery of Bd populations of this species in the UK. The effect of Bd on natterjack toads was assessed by fieldwork and experiments. Wild adult natterjacks were tagged and repeatedly tested for Bd during 2009-2011. Captive adults and juveniles from infected populations were also tested in response to changes in environmental conditions. Swabs were used to

APA, Harvard, Vancouver, ISO, and other styles

27

Burkart, David. "UNDERSTANDING CHYTRIDIOMYCOSIS RESISTANCE BY INVESTIGATING THE CUTANEOUS DEFENSE MECHANISMS OF MARSUPIAL FROGS." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1835.

Full text

Abstract:

Anurans are declining worldwide because of the spread of Batachochytrium dendrobatidis (Bd), the fungus that causes chytridiomycosis. However, some frogs are resistant to this disease, and understanding why may be critical to saving those that are susceptible. In Peru, Gastrotheca excubitor is resistant to chytridiomycosis while Gastrotheca nebulanastes is susceptible. Two anuran skin defenses, symbiotic bacteria and antimicrobial peptides (AMPs), have demonstrated the ability to inhibit Bd in vitro when isolated from certain frogs. We tested if these defenses can explain the difference in sus

APA, Harvard, Vancouver, ISO, and other styles

28

Ribeiro, Júnior José Wagner. "Modelagem hierárquica Bayesiana de comunidades de anfíbios e de seu fungo patogênico (Batrachochytrium dendrobatidis) em riachos da Mata Atlântica /." Rio Claro, 2018. http://hdl.handle.net/11449/154922.

Full text

Abstract:

Orientador: Tadeu de Siqueira Barros<br>Banca: Fernando Rodrigues da Silva<br>Banca: Priscila Lemes de Azevedo Silva<br>Banca: Victor Satoru Saito<br>Banca: Luis Cesar Schiesari<br>Resumo: A Mata Atlântica brasileira se encontra altamente fragmentada e conta com menos de 15% da sua cobertura original, todavia, essas florestas ainda abrigam uma das maiores diversidades de anfíbios com alta proporção de espécies endêmicas e raras. As espécies enfrentam diversas ameaças como perda de habitat e doenças infecciosas nesse bioma. Dessa forma, é alto o interesse para entender como os anfíbios estão di

APA, Harvard, Vancouver, ISO, and other styles

29

Oliveira, Igor Soares de 1980. "Análise de múltiplas ameaças à conservação e diversidade de anfíbios." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316065.

Full text

Abstract:

Orientador: Luís Felipe de Toledo Ramos Pereira<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-27T11:16:08Z (GMT). No. of bitstreams: 1 Oliveira_IgorSoaresde_D.pdf: 4104401 bytes, checksum: 76046f01be0657270cbc44223cd762b9 (MD5) Previous issue date: 2015<br>Resumo: As mudanças climáticas possuem potencial para alterar o funcionamento dos ecossistemas através da extinção de espécies e das conexões entre a biota e o ambiente, alterando os padrões aos quais estamos acostumados e exigindo adaptação. As alterações climáticas t

APA, Harvard, Vancouver, ISO, and other styles

30

Norrick, Derek. "Toxic effects of a combined exposure to nitrate and the fungus Batrachochytrium dendrobatidis on the African Clawed Frog, Xenopus laevis." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/5033.

Full text

Abstract:

The purpose of this study was to examine the synergistic effects of Bactrachochytrium dendrobatidis (chytrid fungus) and sub-lethal nitrate concentrations on fitness response of the African Clawed Frog, Xenopus laevis. The concern is that the increases in environmentally accelerated anthropogenic influenced nitrogen cycling has stressed otherwise healthy amphibians and, when introduced with B. dendrobatidis, the amphibians are less able to mount an appropriate immune response. The purpose of the experiment to determine if fitness cues normally unseen with infected Xenopus laevis frogs and tadp

APA, Harvard, Vancouver, ISO, and other styles

31

Loda, Jennifer. "Associations of amphibians with environmental covariates and estimation of the prevalence of the pathogen Batrachochytrium dendrobatidis in north-central Iowa wetlands." [Ames, Iowa : Iowa State University], 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

32

Meyer, Leon Nicolaas. "Seasonal variation and the influence of environmental gradients on Batrachochytrium dendrobatidis infections in frogs from the Drakensberg mountains / Leon Nicolaas Meyer." Thesis, North-West University, 2009. http://hdl.handle.net/10394/5098.

Full text

Abstract:

The Batrachochytrium dendrobatidis fungus has been implicated in the decline of many frog species as well as the extinction of some throughout the world. Apart from this, declines in some amphibian populations are also caused by variations in temperature. It has been proposed that the cause of the decline or apparent extinctions of at least 14 high elevation species of the Australian tropics were due to B. dendrobatidis. The main aim of this study was to determine the effect of seasonal variations on B. dendrobatidis infections and the influence these have on frog populations in the Drakensber

APA, Harvard, Vancouver, ISO, and other styles

33

Schloegel, Lisa Marie. "Investigations on the dispersal of 'Batrachochytrium dendrobatidis' and Ranaviral disease through the international live animal trade in the Americas and Asia." Thesis, Kingston University, 2012. http://eprints.kingston.ac.uk/23706/.

Full text

Abstract:

Enigmatic amphibian declines are strongly associated with infectious diseases, including chytridiomycosis, caused by the fungus 'Batrachochytrium dendrobatidis' (Bd), and ranaviral disease induced by ranaviruses. A series of data analyses, field sampling, laboratory experimentation and molecular techniques were utilized to test the hypothesis that the international live animal trade is contributing to the spread of these amphibian pathogens. Regions sampled included specific locations in North America, South America and Asia. The magnitude of the live importation of amphibians into the United

APA, Harvard, Vancouver, ISO, and other styles

34

Weldon, Ché. "Chytridiomycosis, an emerging infectious disease of amphibians in South Africa / C. Weldon." Thesis, North-West University, 2005. http://hdl.handle.net/10394/860.

Full text

Abstract:

The sudden appearance of chytridiomycosis, as the cause of amphibian deaths and population declines in several continents suggests that its etiological agent, the amphibian chytrid fungus Batrachochytrium dendrobatidis, was introduced into the affected regions. However, the origin of this virulent pathogen is unknown. Efforts were directed to determine the occurrence of chytridiomycosis in Africa, whether the disease had been introduced into South Africa in recent years and how wild frog populations were affected by infection. A chytridiomycosis survey of 2,300 archived and live specimens invo

APA, Harvard, Vancouver, ISO, and other styles

35

Cikanek, Shawna. "Impact of health, husbandry, and conservation research on glucocorticoid concentrations in Atelopus species." Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16415.

Full text

Abstract:

Master of Science<br>Department of Clinical Sciences<br>James W. Carpenter<br>In many species, temporary increases in glucocorticoids (GC) can be used to identify changes in adrenal activity in response to acute stressors. For this research, GC metabolites were identified in fecal extracts from various Atelopus species. The objectives were to identify possible correlates between GCs and health status, assess the impact of husbandry protocols on adrenal activity, and evaluate the sub-lethal effects of antifungal bacteria used for protection of frogs against the chytrid fungus (Batrachochytriu

APA, Harvard, Vancouver, ISO, and other styles

36

Krynak, Katherine L. "ENVIRONMENTAL INFLUENCES ONAMPHIBIAN INNATE IMMUNE DEFENSE TRAITS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1435590530.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Rumschlag, Samantha Leigh. "The Influence of Environmental Factors on Responses on Amphibian Hosts Across Life Stages to an Infectious Fungal Pathogen." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1468840914.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Cheatsazan, Hamed. "Asymptomatic interaction with the fatal amphibian pathogen, Batrachochytrium dendrobatidis : costs, environmental drivers, the outcome and the risk of chytridiomycosis for the palmate newt (Lissotriton helveticus)." Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2350/.

Full text

Abstract:

L'objectif général de cette thèse est l'étude des coûts, des facteurs environnementaux, ainsi que de l'impact sur la reproduction de la chytridiomycose asymptomatique pour le triton palmé, Lissotriton helveticus. Premièrement, nous avons testé l'impact de l'infection asymptomatique par Batrachochytrium dendrobatidis (Bd) sur les tritons aquatiques : la condition, et l'expression des caractères sexuels. Nous avons ensuite étudié l'impact de l'infection sur la reproduction, le développement et la survie des larves et également examiné l'impact de l'environnement sur les coûts sub-létaux et la ré

APA, Harvard, Vancouver, ISO, and other styles

39

Mcmahon, Taegan A. "Understanding Amphibian Decline: the Role of Pesticides and the Pathogenic Chytrid Fungus on Amphibians and Aquatic Communities." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4727.

Full text

Abstract:

Amphibians are the most threatened taxon on the planet. Declines have been associated with over-exploitation, habitat loss, pollution, and pathogenic diseases, but of these factors, pollution and disease have been relatively under-studied. Here, I investigated: 1) the impacts of commonly used pesticides on aquatic communities, 2) the effect of these pesticides on amphibian susceptibility to the pathogenic chytrid fungus, Batrachochytrium dendrobatidis (Bd), and 3) whether there are non-amphibian hosts of Bd and 4) how to best quantify the survival of Bd through ontogeny of the host. In my firs

APA, Harvard, Vancouver, ISO, and other styles

40

Santana, Caroline Carla. "Produção e transferência passiva de anticorpos da classe IgY anti-Batrachochytrium dendrobatidis purificados de gema de ovos de galinhas poedeiras na imunização de girinos de rã-touro (Lithobates catesbeianus) /." Araraquara, 2019. http://hdl.handle.net/11449/190751.

Full text

Abstract:

Orientador: João Martins Pizauro Junior<br>Resumo: O desenvolvimento dos anfíbios é caracterizado por uma série de eventos que possibilitam a esses animais a ocupação dos ambientes aquático e terrestre. Nesse sentido, a supressão do sistema imunológico é necessária para que esses eventos ocorram de forma ordenada, evitando então, respostas autoimunes. Por outro lado essa imunossupressão durante a metamorfose pode tornar os animas mais susceptíveis a algumas doenças, dentre elas, a causada pelo fungo Batrachochytrium dendrobatidis (Bd), que é considerado o principal patógeno de anfíbios da atua

APA, Harvard, Vancouver, ISO, and other styles

41

Watters, Kayla Christine. "Community Structure and Epizootic Infection Prevalence of Northern Wisconsin Anurans." Wright State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1526041783398815.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Penner, Johannes. "Macroecology of West African amphibians." Doctoral thesis, Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, 2014. http://dx.doi.org/10.18452/17035.

Full text

Abstract:

Amphibienpopulationen sind weltweit bedroht. Für fundierte Entscheidungen im Naturschutz ist ein wissenschaftliches Hintergrundwissen notwendig. Eine wichtige Komponente ist die Verbreitung der Arten und die Gründe hierfür. Dies setzt auch Klarheit bezüglich des taxonomischen Status voraus. Vernachlässigte Regionen liegen meist in den Tropen. Um diese Lücke zu füllen, untersucht die vorliegende Arbeit die Makroökologie westafrikanischer Amphibien. Eine neue Art der Familie Phrynobatrachidae wird beschrieben. Anschließend werden die taxonomischen Unterschiede zweier Mitglieder der Familien der

APA, Harvard, Vancouver, ISO, and other styles

43

Hopkins, Samantha. "Chytridiomycosis in amphibian populations in the Western Cape, South Africa." Thesis, University of the Western Cape, 2002. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_7137_1359702947.

Full text

Abstract:

<p>There have been many cases reported of amphibian populations declining. These are often due to anthropogenic factors such as habitat destruction and pollution. However, some eclines have not had an obvious cause and many of these have been investigated and found to be due to pathogenic disease. Batrachochytrium dendrobatidis is a recently described pathogen of frogs. The population declines that have been associated with chytridiomycosis have occurred in relatively undisturbed areas such as national parks. The declines tend to occur at higher altitudes or in colder climates. This is thought

APA, Harvard, Vancouver, ISO, and other styles

44

Gericke, Maria Catharina. "Aspects of amphibian chytrid infections in South Africa / M.C. Gericke." Thesis, North-West University, 2008. http://hdl.handle.net/10394/3713.

Full text

Abstract:

The waterborne pathogen Batrachochytrium dendrobatidis (Bd), amphibian chytrid, is implicated as being the causative agent for global amphibian declines. The fungus attacks the keratinized skin of adult and postmetamorphic animals and the keratinized mouthparts of tadpoles. Postmetamorphic animals seem to be more susceptible to Bd than tadpoles and adult frogs. Hypotheses exist that the origin of the fungus is in Africa. During the study different aspects of Bd infections in South African frogs were examined including the distribution of Bd, cultivation of Bd, preservation of cultures, the mor

APA, Harvard, Vancouver, ISO, and other styles

45

McNab, Angus. "Dynamics of the amphibian chytrid fungus (Batrachochytrium dendrobatidis) in isolated patches of lowland rainforest." Thesis, 2015. https://researchonline.jcu.edu.au/41341/1/41341-mcnab-2015-thesis.pdf.

Full text

Abstract:

Over the past 20 years, amphibian declines caused by Batrachochytrium dendrobatidis (Bd) have prompted a significant amount of research into the amphibian-chytrid host-parasite relationship. The complexities of the relationship have limited our ability to understand the pathogen, particularly as differences are observed in the impacts of Bd among different amphibian species, and the variation in the impact of the pathogen along an elevation gradient. The significant declines of amphibians at high elevations (400+ m asl) in the Wet Tropics bioregion of north eastern Australia has focused res

APA, Harvard, Vancouver, ISO, and other styles

46

Arellano, María Luz. "Susceptibilidad y sensibilidad de algunas especies de anuros a la infección por el hongo Batrachochytrium dendrobatidis." Tesis, 2013. http://hdl.handle.net/10915/26403.

Full text

Abstract:

La declinación de los anfibios a nivel mundial, e incluso la desaparición de algunas especies, ha sido un fenómeno de especial importancia para muchos científicos en los últimos años. Del total de las especies de anfibios que se conocen en el mundo hasta el momento, un tercio se encuentra amenazada y 165 especies, parecen haberse extinguido a partir de 1980. Los factores que influyen en esta declinación son muchos, y hasta el momento se siguen discutiendo; pero las enfermedades, han sido reconocidas como uno de los factores que más han contribuido a esta declinación. La quitridiomicosis es una

APA, Harvard, Vancouver, ISO, and other styles

47

Puschendorf, Robert. "Environmental effects on a host-pathogen system: frogs and Batrachochytrium dendrobatidis in wet and dry habitats." Thesis, 2009. https://researchonline.jcu.edu.au/17366/1/01front.pdf.

Full text

Abstract:

The global increase in emerging infectious diseases poses a substantial threat to wildlife, especially for small, fragmented and populations exposed to novel pathogens. The emergence of the chytrid fungus Batrachochytrium dendrobatidis is one of the clearest cases of this to date. Batrachochytrium dendrobatidis colonises keratinised cells of the amphibian epidermis and causes the disease chytridiomycosis when pathogen populations on hosts reach a threshold density. Host mortality usually occurs shortly after clinical disease symptoms become evident. Chytridiomycosis is fatal to a wide rang

APA, Harvard, Vancouver, ISO, and other styles

48

LeBlanc, Jonathon. "A genetic survey of the amphibian pathogen Batrachochytrium dendrobatidis collected in British Columbia, Canada and Peninsular Malaysia." Thesis, 2012. http://hdl.handle.net/1828/3931.

Full text

Abstract:

The amphibian pathogen, Batrachochytrium dendrobatidis (Bd), has been the cause of mass declines of amphibian populations worldwide (Berger et al. 1998). This pathogen has been shown to infect approximately 387 different amphibian species and causes declines in approximately 200 species (Skerratt et al. 2009). The total impact on amphibian biodiversity as well as their ecosystems has yet to be determined but it has already been suspected in some species extinctions (Schloegel et al. 2006). The distribution of this amphibian pathogen has been described by two competing hypotheses, the novel and

APA, Harvard, Vancouver, ISO, and other styles

49

Roznik, Elizabeth A. "Effects of individual behaviour on host-pathogen interactions: Australian rainforest frogs and the chytrid fungus Batrachochytrium dendrobatidis." Thesis, 2013. https://researchonline.jcu.edu.au/40584/1/40584-roznik-2013-thesis.pdf.

Full text

Abstract:

Diseases are strongly influenced by host behaviour, which affects pathogen transmission and the microclimatic conditions that are experienced by both hosts and pathogens. The amphibian disease chytridiomycosis, which is caused by the chytrid fungus Batrachochytrium dendrobatidis, has caused severe population declines in many regions of the world. This pathogen is transmitted by contact with water and is highly sensitive to thermal and hydric conditions; it requires relatively cool, moist conditions to survive and reproduce (15-25°C optimal, >28°C lethal). This thesis focuses on the behaviour o

APA, Harvard, Vancouver, ISO, and other styles

50

Bell, Sara Christiane. "The role of cutaneous bacteria in resistance of Australian tropical rainforest frogs to the amphibian chytrid fungus Batrachochytrium dendrobatidis." Thesis, 2012. https://researchonline.jcu.edu.au/26606/1/26606-bell-2012-thesis.pdf.

Full text

Abstract:

Fungal diseases pose a serious threat to animal and plant health. The emergence of the disease chytridiomycosis, caused by the fungus Batrachochytrium dendrobatidis (Bd), has resulted in the declines or extinctions of many amphibian species worldwide, although the severity of its effects varies widely among host species. Antibiotic-producing bacterial symbionts present on amphibian skin can protect their hosts from disease-related mortality. Bioaugmentation of naturally occurring bacteria that are antagonistic to Bd offers great potential for disease prevention in field settings. However, ther

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!