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Teses / dissertações sobre o tema "Anas Platyrhynchos"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Denk, Angelika. "Male and Female Reproductive Tactics in Mallards (Anas platyrhynchos L.)." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-42673.

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2

Lacombe, A. M. A. "Effects of circulating catecholamines on diving in ducks (Anas platyrhynchos)." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30724.

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Plasma catecholamines have been measured in chronically adrenalectomised (ADX) ducks, in chronically adrenal denervated ducks (DNX), in their respective sham-operated controls (SH-adx, SH-dnx) as well as in intact ducks after 3 minutes forced submergence. The results showed that 100% of the plasma Epinephrine (EP) and 40 to 80% of plasma Norepinephrine (NE) released during the dive came from the adrenal glands. 20 to 60% of plasma NE came from endings of the autonomic vascular sympathetic nerves which are strongly stimulated during diving. Adrenal catecholamines were released by nerve activat

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3

Cunningham, Emma Jane Ann. "Forced copulation and sperm competition in the mallard Anas platyrhynchos." Thesis, University of Sheffield, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262851.

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4

Cnotka, Julia. "Hirnveränderungen bei domestizierten Landenten (Anas platyrhynchos f.d.)-morphometrische und ethologische Untersuchungen." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982291108.

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5

Gunnarsson, Gunnar. "Survival patterns and density-dependent processes in breeding mallards Anas platyrhynchos." Doctoral thesis, Umeå : Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200712.pdf.

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6

Åkerstedt, Lovisa. "Intraspecifik aggression mellan gräsänder (Anas platyrhynchos) i urbana och rurala habitat." Thesis, Karlstads universitet, Institutionen för miljö- och livsvetenskaper (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84260.

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The continuing increase in urbanization is changing the natural habitats of wild animals. Some wildlife have colonized urban areas and are exposed to new stimuli to which they respond differently: some species adapt whereas others thrive. Living in such an environment can lead to increased stress and elevated aggression. The purpose of this study was to examine the intraspecific aggression among mallards (Anas platyrhynchos) in two habitats with different degree of urbanization. Field observations were performed on groups of mallards in urban and rural environments. I predicted that there woul

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7

Cruz, Tiago Miguel Regateiro. "Censo de aves aquáticas em Mira e nidificação de Anas platyrhynchos." Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7923.

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Mestrado em Biologia Aplicada<br>Este trabalho foi desenvolvido em duas lagoas de Mira que pertencem à Rede Natura 2000 e teve como principais objectivos monitorizar as espécies de aves aquáticas e estudar a reprodução do Pato-real (Anas platyrhynchos). A monitorização de aves aquáticas foi efectuada com o propósito de avaliar a variação mensal de aves nas 2 lagoas existentes na área de estudo, por forma a obter informação útil para a gestão e ordenamento da zona, bem como para a preservação das espécies. No desenho experimental idealizado optou-se por efectuar quatro contagens por mês em cad

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8

Lusimbo, Wanjala Simiyu. "Toxicity of Prudhoe Bay crude oil to mallard duck (Anas platyrhynchos) embryos." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0019/NQ43517.pdf.

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9

Simões, Karina. "Ciclo reprodutivo anual e caracteristicas morfologicas testiculares do pato domestico (Anas platyrhynchos)." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/316734.

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Orientador: Antonio Orsi<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-04T00:24:17Z (GMT). No. of bitstreams: 1 Simoes_Karina_D.pdf: 5008621 bytes, checksum: 052a8d69de71694b3bfdb0e3ffdcc5b0 (MD5) Previous issue date: 2004<br>Resumo: Em aves, a reprodução é um processo cíclico definido, onde a cada ano os órgãos reprodutores crescem e regridem sob a influência de fatores ambientais. Durante o processo de maturação das gônadas e reprodução, o organismo do animal mobiliza energia intensamente. O processo reprodutivo é bem

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10

Cabral, Liliane Ferreira. "Vacinação de patos-reais (Anas platyrhynchos) contra a gripe aviária em Portugal." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2009. http://hdl.handle.net/10400.5/1243.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Na última década, a estirpe asiática H5N1 de alta patogenicidade disseminou-se rapidamente pela Ásia, Europa e África, resultando no morticínio de mais de 250 milhões de aves domésticas e na morte de mais de duas centenas de pessoas, representando uma séria ameaça à Saúde Pública. Os patos, especialmente o pato-real (Anas platyrhynchos), desempenham um papel importante na amplificação e na disseminação do vírus. Por conseguinte, a disponibilização de vacinas que sejam eficazes nesta espécie em condições “de campo” constitui-se

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11

Barra, Inostroza Marlene. "Olika faktorer som styr gräsandhanars (Anas platyrhynchos) ruggningsperiod mellan prakt- och eklipsdräkt." Thesis, Högskolan i Halmstad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-43307.

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12

Khabazi, Ali. "Anatomie comparée du développement du système ostéo-musculaire des oiseaux : implications des contraintes fonctionnelles sur la croissance." Thesis, Paris, Muséum national d'histoire naturelle, 2017. http://www.theses.fr/2017MNHN0008.

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Nous avons étudié l’impact de contraintes mécaniques contrastées sur la structure des pattes de canard (Anas platyrhynchos) pour comprendre l’influence de l’environnement sur la variabilité phénotypique. Des canards ont été élevés sous quatre conditions expérimentales: 1/ marche restreinte, 2/ marche libre 3/marche augmentée 4/ marche et nage. Les vingt-huit muscles et les trois os longs de la patte de ces oiseaux ont été mesurés. Une comparaison a été faite entre les appareils locomoteurs des canards des cailles et des pies pour établir un lien entre les types de marche et la morphologie des

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13

Wilberg, Claudia. "Untersuchungen zur Inhalationsnarkose mit Isofluran sowie mit Buprenorphinprämedikation bei der Warzenente (Anas platyrhynchos)." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-41606.

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14

Remy, Felix Benedikt. "Tiergerechte Wasserversorgung von Pekingenten (Anas platyrhynchos f. domestica) unter dem Aspekt Tierverhalten und Tiergesundheit." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-41761.

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15

Smith, Frank Melvin. "Arterial baroreceptor control of the circulation during forced dives in ducks (Anas Platyrhynchos var.)." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27533.

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When dabbling ducks are involuntarily submerged, arterial vasoconstriction produces a large increase in the peripheral resistance to blood flow which is balanced by a decrease in output of the heart, and arterial blood pressure is maintained. Arterial baroreceptors sense systemic blood pressure, and provide the afferent information to the baroreflex for pressure regulation. The effector limbs of the baroreflex are the same as those involved in the diving responses, and the baroreceptors are likely to be important in the integration of the cardiovascular responses to diving. The purpose of this

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16

Jax, Elinor [Verfasser]. "Immunology going wild : genetic variation and immunocompetence in the mallard (Anas platyrhynchos) / Elinor Jax." Konstanz : KOPS Universität Konstanz, 2019. http://d-nb.info/1189593912/34.

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17

Whitehead, John Gardner. "An examination of the kinematics and behavior of mallards (Anas platyrhynchos) during water landings." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99383.

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This dissertation aims to address how a change in landing substrate may change landing kinematics. To examine this possibility, mallards (Anas playtrhynchos) were used as a study species and 177 water landings were recorded through the use of two camera systems with photogrammetric capabilities. This enabled the landing trajectory and landing transition kinematics to be tracked in three dimensions. From the resulting position data three questions were pursued. Do mallards regulate landing kinematics through a ̇-constant strategy? With what kinematics do mallards land on water? Do landing kinem

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18

Champagnon, Jocelyn. "Conséquences des introductions d’individus dans les populations exploitées : l’exemple du Canard Colvert Anas platyrhynchos." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20147/document.

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Le renforcement des populations naturelles exploitées par des individus captifs est rarement évalué, bien qu'il puisse induire des modifications notables sur la population naturelle à de nombreux niveaux : démographie, comportement, morphologie, génétique, pathogènes. Ce travail de thèse concerne les introductions de canards colverts Anas platyrhynchos réalisées à des fins cynégétiques. Cette pratique est très répandue en Europe, depuis plus de trente ans. Du fait de leur domestication en élevage, les canards lâchés subissent une mortalité naturelle très forte comparée aux oiseaux sauvages, à

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19

Gabbott, Geoffrey Roy Julian. "Neural control of the cardiac response of the Pekin duck (Anas platyrhynchos) to forced submersion." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25783.

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Cardiovascular responses evoked during forced submersion enable the Pekin duck (Anas platyrhynchos) to survive protracted periods of asphyxia. The responses include an extraordinary bradycardia and intense peripheral vasoconstriction with the result that blood flow is favoured to those organs most susceptible to lack of oxygen. These adjustments appear to be mediated via the caudal brainstem following stimulation of peripheral and central arterial chemoreceptors. The minor role that baroreceptors play in the generation of these responses was demonstrated by the persistence of the cardiovascul

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20

Dalby, Lars, Pär Söderquist, Thomas K. Christensen, et al. "The status of the Nordic populations of the Mallard (Anas platyrhynchos) in a changing world." Högskolan Kristianstad, Avdelningen för Naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-10140.

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Dabbling ducks (Anas spp.) are importantmigratory quarry species, protected as a shared resource under international legislation. However, there is a lack of sufficient high-quality data on vital demographic rates and long-term trends in numbers to judge the conservation status of many duck populations at the flyway level. In response to reported declines in the North-West European flyway population of theMallard, we compiled available data on this species in the Nordic countries up to 2010. Generally, national breeding numbers showed increasing trends, wintering abundance showed variable tren

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21

Barber, Claire Louise. "Vision and the lighting requirements of ducks (Anas platyrhynchos domesticus) and turkeys (Meleagris gallopavo gallopavo)." Thesis, University of Bristol, 2003. http://hdl.handle.net/1983/5a570dc4-74ab-4c71-b7d0-b185e0e06533.

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In poultry housing where the light environment is provided artificially, it is largely designed to meet the requirements of human vision and poultry production and does not necessarily consider the bird's visual abilities. Extrapolation of research from fowl to other poultry species may be inappropriate, given their different ecological backgrounds. The overall aim of this thesis was to investigate vision in domestic ducks and turkeys and their light requirements. The spectral sensitivity of domestic ducks, domestic turkeys and humans was investigated using a behavioural test. Ducks and turkey

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22

Jöbsis, Paul D. "Muscle oxygenation and blood flow during submersion in ducks (anas platyrhynchos) and seals (phoca vitulina) /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9907822.

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23

Águas, Maria Serpa Cabral de Matos. "Dispersão passiva de lagostim vermelho da Luisiana (Procambarus clarkii) através de pato-real (Anas platyrhynchos)." Master's thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/15603.

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Neste trabalho testámos a possibilidade de dispersão passiva dos juvenis do lagostim vermelho da Luisiana (Procambarus clarkii) através de um vector animal, o pato-real (Anas platyrhynchos). Realizou-se uma experiência de dessecação, a duas temperaturas, constatando-se que os juvenis sobrevivem até 225 minutos fora de água, resistindo mais tempo quando à temperatura inferior. Realizaram-se também outras duas experiências para determinar a capacidade de se agarrarem a patas do pato e à plumagem do pato em movimento. Os resultados da primeira experiência levaram-nos a concluir que o tempo de rep

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24

Shimizu, Manabu. "Acid-base balance in arterial plasma of white Pekin duck (Anas platyrhynchos) during forced submergence and recovery." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25044.

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Acid-base balance in plasma was studied in forcibly submerged Pekin ducks (Anas platyrhynchos). All important variables determining acid-base balance (arterial CO₂ tension (PαCO₂) strong ion difference ([SID]) and total protein content which approximates total weak acid concentration in plasma) were measured. During forced submergence PαCO₂ increased and pHa steadily decreased with time. There was also an increase in [lactate⁻], which was accompanied by an increase of equal magnitude in [Na⁺]. There were no significant changes in the concentrations of other strong ions (K⁺, Ca²⁺, Mg²⁺ and Cl⁻

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25

Mahdi, Adnan Hammad. "The structure and innervation of the sphincters in the large intestine of the domestic duck (Anas platyrhynchos)." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/29864.

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26

Duckart, Susanne. "Untersuchungen zu Auswirkungen des Merkmals "Federhaube" auf die Embryogenese und Juvenilentwicklung bei Hausenten (Anas platyrhynchos f. dom.)." Giessen VVB Laufersweiler, 2007. http://d-nb.info/989809307/04.

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27

Gloutney, Mark Louis. "Nest-site selection, energetics of reproduction and comparative behaviour of mallard (Anas platyrhynchos) and blue-winged teal (A. discors)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24058.pdf.

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28

Oellrich, Wiebke. "Experimentelle Untersuchungen zum Verlauf von Infektionen mit Salmonella Enteritidis und Salmonella Typhimurium bei der kommerziell genutzten Pekingente (Anas platyrhynchos)." Giessen DVG-Service, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?idn=980872472.

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29

Rodrigue, Jean. "Utilisation du canard de Pékin (Anas platyrhynchos) comme bioindicateur de la contamination du milieu naturel par les substances bioaccumulables." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22796.

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Eighteen-month-old adult female Peking Ducks (Anas platyrhynchos) were placed in the Ottawa, and St. Lawrence rivers for periods varying between 14 and 72 days during the summers of 1987, 1988 and 1989. Two stations located on Lake St. Francis were selected for establishing a time-curve for the accumulation of organochlorine pesticides (OC) and PCB in the liver. The ducks rapidly lost weight during their first 20 days in the natural environment but stabilised after about 40 days. This weight loss was caused by the stress of habitat, change, the energetic costs in searching for food and moultin

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30

Lauterbach, Sarah E. "Year-round influenza A virus surveillance in mallards (Anas platyrhynchos) reveals genetic persistence during the under-sampled spring season." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586522647739509.

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31

Nishizawa, Márcia [UNESP]. "Estudo dos estados imune e de portador em marrecos de pequim (Anas platyrhynchos) frente ao vírus da doença de Newcastle." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/104635.

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Made available in DSpace on 2014-06-11T19:33:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-02-22Bitstream added on 2014-06-13T18:07:34Z : No. of bitstreams: 1 nishizawa_m_dr_jabo.pdf: 817217 bytes, checksum: c7d2f29bf8d4ac1ee5c3fbc71c4756c1 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Parâmetros imunológicos, clínicos, epidemiológicos e patológicos da vacinação em marrecos de Pequim foram avaliados por 3 experimentos. Para tanto, foram utilizadas amostras vacinais Ulster 2C, B1 e LaSota do vírus da doença de Newcastle (VDN). No experimento 1, fo

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32

Duranel, Arnaud. "Effets de l'ingestion de plombs de chasse sur le comportement alimentaire et la condition corporelle du canard colvert (Anas platyrhynchos)." Phd thesis, Ecole nationale vétérinaire de Nantes, 1999. http://tel.archives-ouvertes.fr/tel-00825999.

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Après avoir fait la synthèse des connaissances sur le saturnisme chez les Anatidés et rappelé l'importance de la compétitivité, notamment en terme de recherche alimentaire et de condition corporelle, pour la survie et le succès reproducteur d'un individu en milieu naturel, l'auteur décrit les effets de l'ingestion d'un faible nombre de plombs de chasse chez le Canard colvert. Il montre que la vitesse d'ingestion de l'aliment est corrélée de façon négative à la plombémie jusqu'à quatre semaines au minimum après ingestion des plombs. A ce stade, la condition corporelle, estimée par un index d'ad

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33

Nishizawa, Márcia. "Estudo dos estados imune e de portador em marrecos de pequim (Anas platyrhynchos) frente ao vírus da doença de Newcastle /." Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/104635.

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Orientador: Antonio Carlos Paulillo<br>Banca: Ruben Pablo Schoken-Iturrino<br>Banca: Laura Satiko Okada Nakaghi<br>Banca: Luciano Doretto Júnior<br>Banca: Maria Estela Gaglianone Moro<br>Resumo: Parâmetros imunológicos, clínicos, epidemiológicos e patológicos da vacinação em marrecos de Pequim foram avaliados por 3 experimentos. Para tanto, foram utilizadas amostras vacinais Ulster 2C, B1 e LaSota do vírus da doença de Newcastle (VDN). No experimento 1, foram utilizados 120 marrecos de Pequim de 1 dia de idade, distribuídos em 4 tratamentos de 30 animais cada, submetidos a diferentes programas

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34

Sell, Cameron W., University of Western Sydney, of Science Technology and Environment College, and School of Environment and Agriculture. "An investigation into the Australian duck industry with particular reference to the energy and amino acid requirements of commercially farmed Australian pekin ducks (Anas Platyrhynchos)." THESIS_CSTE_EAG_Sell_C.xml, 2003. http://handle.uws.edu.au:8081/1959.7/522.

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Limited published data exists on the Australian duck industry, particularly in relation to the nutritional requirements of the commercial duck (Anas Platyrhynchos). A series of seven experiments was designed to determine whether current nutritional recommendations for energy, lysine, methionine, threonine and tryptophan were sufficient to optimise growth, feed efficiency, and carcass characteristics of the duck. The ability of the duck to perform diet self selection was then examined for its potential use in the Australian industry. The outcome of the diet self selection experiments showed tha

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35

Ribeiro, Ana Pires Fernandes. "Perfil nutricional da fracção lipídica da carne de aves cinegéticas (perdiz, faisão, pato)." Master's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2013. http://hdl.handle.net/10400.5/5969.

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Dissertação de Mestrado em Segurança Alimentar<br>As aves cinegéticas suscitam um grande interesse nos caçadores, no entanto a qualidade da carne não tem tido esse impacto ao nível da comunidade científica. Assim, o objectivo deste estudo foi caracterizar a fracção lipídica da carne (peito e perna) de faisão, pato e perdiz, de produção (Phasanius colchius, Anas platyrhynchos, Alectoris rufa) assim como comparar a fracção lipídica da carne de perdizes de produção e silváticas. Os lípidos totais foram determinados gravimetricamente, o colesterol total e os tococromanóis foram quantificados por

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36

Oellrich, Wiebke [Verfasser]. "Experimentelle Untersuchungen zum Verlauf von Infektionen mit Salmonella Enteritidis und Salmonella Typhimurium bei der kommerziell genutzten Pekingente (Anas platyrhynchos) / vorgelegt von Wiebke Oellrich." Gießen : DVG-Service, 2006. http://d-nb.info/980872472/34.

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37

Varna, Klaidas. "Pienarūgščių bakterijų paieška ir jų identifikavimas migruojančių didžiųjų ančių (Anas platyrhynchos) žarnyne naudojant dalinių 16S rRNR geno sekų analizę ir kultivavimu paremtus metodus." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20090908_194033-88862.

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Pienarūgščių bakterijų paieška ir jų identifikavimas migruojančių didžiųjų ančių (Anas platyrhynchos) žarnyne naudojant dalinių 16S rRNR geno sekų analizę ir kultivavimu paremtus metodus Klaidas VARNA Vilniaus Universiteto Ekologijos Institutas, Hidrobiontų Ekologijos ir Fiziologijos Laboratorija bei Populiacinės Genetikos Laboratorija, Akademijos-2, Vilnius-21, 08412, Lietuva. Šiame tyrime pavasarinių ir rudeninių didžiųjų ančių (Anas platyrhynchos) migrantų iš Nemuno deltos virškinamojo trakto pieno rūgšties bakterijų įvairovė buvo ištirta naudojant molekulinius metodus (polimerazės grandini

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38

Sell, Cameron W. "An investigation into the Australian duck industry with particular reference to the energy and amino acid requirements of commercially farmed Australian pekin ducks (Anas Platyrhynchos)." Thesis, View thesis, 2003. http://handle.uws.edu.au:8081/1959.7/522.

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Limited published data exists on the Australian duck industry, particularly in relation to the nutritional requirements of the commercial duck (Anas Platyrhynchos). A series of seven experiments was designed to determine whether current nutritional recommendations for energy, lysine, methionine, threonine and tryptophan were sufficient to optimise growth, feed efficiency, and carcass characteristics of the duck. The ability of the duck to perform diet self selection was then examined for its potential use in the Australian industry. The outcome of the diet self selection experiments showed tha

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Sell, Cameron W. "An investigation into the Australian duck industry with particular reference to the energy and amino acid requirements of commercially farmed Australian pekin ducks (Anas Platyrhynchos) /." View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20051007.105841/index.html.

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Chauve, Claude. "Caractérisation de la faune coccidienne des Anatinae domestiques : Anas platyrhynchos, Cairina moschata, et leur hybride, le canard mulard : description d'une nouvelle espèce, Eimeria mulardi Chauve et al., 1994 : cycle évolutif et pathogénicité." Lyon 1, 1994. http://www.theses.fr/1994LYO1T096.

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McKean, Josephine Kay. "Effects of alcohol on the development of the cardiovascular system in Pekin Ducks (Anasplatyrhynchos): An assessment of current empirical findings and the development of aresearch protocol utilizing Pekin Ducks." Capital University Honors Theses / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=caphonors1619709990242982.

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Lanchon-Aubrais, Elisabeth. "Conséquences d'un apport artificiel de nourriture sur le comportement d'un canard de surface : le canard colvert (anas platyrhynchos, l.) et d'un canard plongeur: le fuligule milouin (aythya ferina, l.) au lac de grand-lieu." Rennes 1, 1992. http://www.theses.fr/1992REN10160.

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Au lac de Grand-Lieu, la pratique de la chasse au gibier d'eau amène la distribution quotidienne de 1 a 5 tonnes de blé. Quelques minutes après l'agrainage effectué le matin en eau superficielle, les colverts rejoignent en masse les sites de nourrissage et s'alimentent intensément. 1 a 2 h après, ils rejoignent des aires de repos propres a chaque site. En revanche, les milouins, agrainés en eau plus profonde, stationnent toute la journée sur les postes de nourrissage ou alternent des phases alimentaires et de confort. En été, les colverts quittent le lac le soir pour rejoindre des gagnages nat

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BOOS, MATHIEU. "Modifications des reserves energetiques corporelles du canard colvert (anas platyrhynchos) et de la becasse des bois (scolopax rusticola) au cours de leur hivernage : aspects fonctionnels lies a la biologie de ces especes et aux conditions du milieu." Université Louis Pasteur (Strasbourg) (1971-2008), 2000. http://www.theses.fr/2000STR13089.

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L'hivernage est une periode critique pour de nombreuses especes d'oiseaux, notamment parce que la balance energetique peut subitement devenir negative en raison de vagues de froid ou d'une intoxication par des metaux lourds. Ce travail a ainsi ete realise sur le canard colvert et la becasse des bois, especes ayant une sensibilite hivernale differente. Chez le canard colvert, espece a fort dimorphisme sexuel, les femelles accumulent, relativement a leur masse corporelle, une plus grande quantite de lipides que les males ; ces derniers ont en outre une charge alaire plus elevee. Chez la becasse

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García, Suikkanen Carolina. "Estudio de los efectos de las infraestructuras de transporte sobre la fauna en un humedal costero mediterráneo (Parque Natural de l'Albufera de Valencia). Propuesta de medidas para la desfragmentación y valoración de sus efectos sobre dos especies representativas: ánade azulón (Anas platyrhynchos) y gineta (Genetta genetta)." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/14636.

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El estudio se centra en dos de los efectos más importantes que ejerce la presencia de las infraestructuras lineales sobre la fauna: los atropellos y el efecto barrera. El área de estudio corresponde un humedal costero protegido, el Parque Natural de l'Albufera. Para el estudio de los atropellos se prospectaron las carreteras que recorren el interior de dicho Parque en bicicleta, registrando los atropellos de vertebrados detectados. Mediante este estudio se pudo comprobar el gran impacto que supone la presencia de estas vías sobre la fauna presente en el entorno. Uno de los grupos faunísticos m

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Mahoney, Michael Jeffrey. "Brood preferences in brooding mallard hens (Anas platyrhynchos platyrhynchos)." 1986. http://hdl.handle.net/1993/9344.

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Javůrková, Veronika. "Antipredační strategie kachny divoké (Anas platyrhynchos)." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-370371.

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Beaudoin, Laura A. "Examining the components of attachment in mallard ducklings (Anas platyrhynchos platyrhynchos)." 2006. http://hdl.handle.net/1993/20317.

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Wereha, Tyler J. "Brood size preferences of broods of mallard ducklings (Anas platyrhynchos platyrhynchos)." 2007. http://hdl.handle.net/1993/21026.

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Lin, Wei-Chih, and 林偉智. "Morphogenesis of the curly tail feathers in mallard (Anas platyrhynchos)." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/26525471235291267732.

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碩士<br>國立中興大學<br>動物科學系所<br>105<br>Mallard (Anas platyrhynchos) is a common meat-type water fowl. During their breeding seasons (April to May and September to October in Taiwan), the mallard show sexual dimorphic plumage. However, four tail feathers, called sexual curled feathers (SCFs), surrounding the oiler gland in the male mallard display curly morphology, which is different from the rest of tail feathers. Furthermore, the curly-shape feathers exist irrelevantly to the breeding seasons and are absent in the female. Therefore, the aims of this study were to investigate the coordination of cha

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"Ciclo reprodutivo anual e caracteristicas morfologicas testiculares do pato domestico (Anas platyrhynchos)." Tese, Biblioteca Digital da Unicamp, 2004. http://libdigi.unicamp.br/document/?code=vtls000336873.

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