Thematische Bibliographien / Anas Platyrhynchos

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Auswahl der wissenschaftlichen Literatur zum Thema „Anas Platyrhynchos“

Autor: Grafiati
Veröffentlicht am 4. Juni 2021
Zuletzt aktualisiert am 9. Juni 2025

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Zeitschriftenartikel zum Thema "Anas Platyrhynchos"

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Hu, Junjie, Mingzhu Zhang, Zhipeng Wu, Hongxia Zeng, and Jianping Tao. "Description of SarCoCYSTIS PlaTYrhYNChoSI n. sp. (Apicomplexa: Sarcocystidae) from domestic ducks ANaS PlaTYrhYNChoS (Anseriformes: Anatidae) in China." Parasites & Vectors 16, no. 1 (February 2, 2023): 1–8. https://doi.org/10.1186/s13071-023-05656-w.

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Hu, Junjie, Zhang, Mingzhu, Wu, Zhipeng, Zeng, Hongxia, Tao, Jianping (2023): Description of SarCoCYSTIS PlaTYrhYNChoSI n. sp. (Apicomplexa: Sarcocystidae) from domestic ducks ANaS PlaTYrhYNChoS (Anseriformes: Anatidae) in China. Parasites & Vectors (50) 16 (1): 1-8, DOI: 10.1186/s13071-023-05656-w, URL: http://dx.doi.org/10.1186/s13071-023-05656-w
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Zhang, Yong, Pengfei Wang, Liuqing Yang, Yanbin Liu, Yuping Lu, and Xiaokang Zhu. "Novel Swarm Intelligence Algorithm for Global Optimization and Multi-UAVs Cooperative Path Planning: Anas Platyrhynchos Optimizer." Applied Sciences 10, no. 14 (July 14, 2020): 4821. http://dx.doi.org/10.3390/app10144821.

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In this study, a novel type of swarm intelligence algorithm referred as the anas platyrhynchos optimizer is proposed by simulating the cluster action of the anas platyrhynchos. Starting from the core of swarm intelligence algorithm, on the premise of the use of few parameters and ease in implementation, the mathematical model and algorithm flow of the anas platyrhynchos optimizer are given, and the balance between global search and local development in the algorithm is ensured. The algorithm was applied to a benchmark function and a cooperative path planning solution for multi-UAVs as a means of testing the performance of the algorithm. The optimization results showed that the anas platyrhynchos optimizer is more superior in solving optimization problems compared with the mainstream intelligent algorithm. This study provides a new idea for solving more engineering problems.
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Tu, Yong Gang, and Yan Zhao. "Determination of Multi-Element in Egg of Poyang Lake Anas platyrhynchos by ICP-AES." Advanced Materials Research 605-607 (December 2012): 882–86. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.882.

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The contents of inorganic elements such as Al, As, Ba, Ca, Cd, Co, Cr, Cu, Fe, Li, K, Mg, Mn, Mo, Na, P, Pb, Zn, Se and Sr in egg of Poyang Lake anas platyrhynchos were determined by using inductively coupled plasma-atomic emission spectrometry (ICP-AES). The recoveries obtained by the standard addition method ranged between 84.4%-113.7%, and RSDs were lower than 8.02%. The measuring method provided better accuracy and precision. The determination results showed that the egg of Poyang lake anas platyrhynchos was rich in essential inorganic elements, and the contents of most of the inorganic elements in yolk were higher than protein. The contents of Cu, Fe, Mn and Zn in edible part of anas platyrhynchos egg were higher than Sheldrake, while the contents of Ca, P and Mg were less than Sheldrake. The contents of Ca, P, and Mg in anas platyrhynchos eggshell were less than Sheldrake
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Muthmainnah, Atika, and Khalid Jalali. "Produktivitas Budidaya Antara Bebek Peking (Anas platyrhynchos) dengan Bebek Hibrida (Anas platyrhynchos domesticus)." Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan 2, no. 4 (October 28, 2022): 255–68. http://dx.doi.org/10.36312/pjipst.v2i4.127.

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Broiler ducks are ducks that are able to grow quickly and can convert feed efficiently into meat with high value. Duck meat has a good structure and structure of the meat. The good structure of duck meat is now popular with the public, because the taste of the meat is delicious and savory. Broiler ducks that are known by the public include hybrid ducks and peking ducks. The demand for duck meat that continues to increase does not change with the availability of duck meat available in the market, to meet the needs of the community. It is possible to breed broiler ducks as proof that the poultry business for ducks is wide open with the promised profit prospects. The purpose of this study was to determine the productivity in broiler duck cultivation which can increase body weight gain quickly, economically and produce meat that has high nutrition to meet public demand. The research method used is literature review by analyzing relevant articles and focusing on the productivity of broiler duck farming. Based on maintenance for 6 weeks, the data obtained was the consumption of hybrid rations as much as 6,514 g/head while in peking ducks as much as 7,601 g/head, PBB in hybrid ducks was 1,237 g/head, while for peking ducks 1,699 g/head, FCR in ducks hybrid 5.29 and peking duck 4.49 and mortality of hybrid duck 4% and peking duck 12%. The weight gain, mortality, and feed conversion of peking ducks were higher than that of hybrid ducks. The conclusion from the results of the study that the best duck genotype to produce FCR was hybrid duck and production performance which included body weight gain, feed consumption and feed conversion in peking ducks and hybrid ducks.
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Faragó, Sándor, Ferenc Jánoska, Péter Pál Hajas, and Gyula Kovács. "TŐKÉS RÉCE (Anas platyrhynchos) FAJKEZELÉSI TERVE MAGYARORSZÁGON = MANAGEMENT PLAN FOR MALLARD (Anas platyrhynchos) IN HUNGARY." Magyar Vízivad Közlemények 28 (2016): 115–56. http://dx.doi.org/10.17242/mvvk_28.04.

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Grosselet, Manuel, and John M. Focey. "Registro de Carpodacus cassini y Anas platyrhynchos diazi en Oaxaca, México." Huitzil Revista Mexicana de Ornitología 3, no. 1 (October 7, 2022): 11–13. http://dx.doi.org/10.28947/hrmo.2002.3.1.10.

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Se reportan los registros de Carpodacus cassinii y Anas platyrhynchos diazi para Oaxaca, México. Los días 9 y 10 de enero de 2001 se observaron 28 individuos de Carpodacus cassinii en la comunidad de Cuajimoloyas, Sierra Norte de Oaxaca (3100 msnm). Por otra parte, del 30 de marzo al 25 de abril de 2001 se observó un individuo de Anas platyrhynchos diazi en la presa Piedra Azul, Teotitlán del Valle (1700 msnm).
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Oguntunji, A. O., AC Adeola, A. Makram, W. PB Putra, and L. O. Oriye. "Phenotypic characterization of the Nigerian Mallard duck (Anas platyrhynchos platyrhynchos)." Indian Journal of Poultry Science 55, no. 3 (2020): 169–77. http://dx.doi.org/10.5958/0974-8180.2020.00031.8.

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Tymcio, Tomasz, Katarzyna Kavetska, Michał J. Czyż, and Maciej Skoracki. "Ontogeny of Chenophila platyrhynchos sp. nov. (Acari: Syringophilidae), an ectoparasite of the Mallard Anas platyrhynchos (Anseriformes: Anatidae)." Turkish Journal of Zoology 37, no. 5 (August 12, 2013): 659–67. https://doi.org/10.3906/zoo-1302-11.

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Tymcio, Tomasz, Kavetska, Katarzyna, Czyż, Michał J., Skoracki, Maciej (2013): Ontogeny of Chenophila platyrhynchos sp. nov. (Acari: Syringophilidae), an ectoparasite of the Mallard Anas platyrhynchos (Anseriformes: Anatidae). Turkish Journal of Zoology 37 (5): 659-667, DOI: 10.3906/zoo-1302-11, URL: http://dx.doi.org/10.3906/zoo-1302-11
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Wereha, Tyler J., and L. James Shapiro. "Examining the preferences of broods of mallard ducklings, Anas platyrhynchos platyrhynchos." Animal Behaviour 78, no. 4 (October 2009): 865–71. http://dx.doi.org/10.1016/j.anbehav.2009.07.008.

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Burgess, Elizabeth C. "EXPERIMENTAL INOCULATION OF MALLARD DUCKS (ANAS PLATYRHYNCHOS PLATYRHYNCHOS)WITH BORRELIA BURGDORFERI." Journal of Wildlife Diseases 25, no. 1 (January 1989): 99–102. http://dx.doi.org/10.7589/0090-3558-25.1.99.

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Dissertationen zum Thema "Anas Platyrhynchos"

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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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 activation only; non neural mechanisms did not play any role in their release. Maximum dive times (MDT) in chronically adrenalectomised ducks (ADX: 5 min. 19 ± 20 sec.) and in chronically adrenal denervated ducks (DNX: 7 min. 10 ± 13 sec.) were significantly lower than in sham-operated controls (respectively SH-adx: 9 min. 58 ± 45 sec., SH-dnx: 12 min. 10 ± 28 sec). Venous infusion of catecholamines in ADX and DNX during the dive increased MDT: MDT of DNX ducks perfused with catecholamines (9 min. 46 ± 20 sec.) were significantly higher than in DNX perfused with saline (7 min. 21 ± 17 sec.), but did not reach the MDT observed in the SH-dnx: other adrenal products must be involved. Diving heart rates of ADX and DNX (at 4 min. dive respectively: 62 ± 16 and 31 ± 2 beats/min.) were significantly higher than in their sham-operated controls (23 ± 3 and 17 ± 2 beats/min.) . Blood pressure during the dive was signifi- cantly lower in ADX and DNX (at 4 min. dive respectively: 93 ± 8 and 98 ± 4 mmHg) compared with their sham-operated controls (131 ± 12 and 118 ± 6 mmHg). Infusion of catecholamines in DNX raised blood pressure towards SH-dnx values, but there was no change in heart rate. PaO₂, CaO₂, pHa and lactate levels in DNX (respectively: 42 ± 2 mmHg, 4.5 ± 0.8 ml 02 /100ml blood, 7.233 ± 0.016, 3.1 + 0.3 mM) were significantly lower than in SH-dnx after 5 minutes submergence (53 ± 1 mmHg, 6.8 ± 0.4 ml 02 /100 ml blood, 7.301 ± 0.007, 4.8 + 0.4 mM). There was also a significant increase of plasma N⁺ (+ 5.4 ± 1.7 mEq/L) in SH-dnx after 5 minutes submergence, but this was not the case in DNX where it was K⁺ (+ 1.1 ± 0.4 mEq/L) which increased. This suggested that adrenal catecholamines increase tolerance to underwater submersion by enhancing peripheral vasoconstriction, thus preserving the O₂ stores for the heart and brain. Moreover, they may affect the acid-base equilibrium during diving by increasing the activity of the Na⁺K⁺ pump and may also have a direct effect on the rate of glycogenolysis. Preventing the actions of catecholamines on the heart by injecting beta-blocker during forced submersion did not decrease MDT; however the cardiovascular response was markedly affected. During beta-blockade, diving heart rate rose steadily from 24 ± 6 beats/minute after 2 minutes to 52 ± 8 beats/minute after 6 minutes diving. In contrast, heart rates remained close to the levels reached at 2 minutes (17 ± 3 and 19 ± 4 beats/minute) throughout the control dives. Perfusion pressure and blood flow have been recorded simultaneously in both hind limbs of ducks. One leg was perfused with different blood mixtures devoid of catecholamines (Test leg) and compared with the other, perfused with the ducks'own blood (autoperfused leg). This showed that hyper-capnia has a depressant effect on the neural component of the peripheral vasoconstriction. Perfusion of test legs with hypoxic-hypercapnic blood to which catecholamines were added, showed that circulating catecholamines are needed to increase peripheral vasoconstriction during diving. In summary, during forced submergence circulating catecholamines, released mainly by the adrenal glands, compensate for the depressant action of hypercapnia on the neural component of peripheral vasoconstriction. Maintenance of this peripheral vasoconstriction during forced diving ensures that O₂ stores are not wasted on peripheral tissues, and this explains how MDT is prolonged.<br>Science, Faculty of<br>Zoology, Department of<br>Graduate
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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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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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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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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 would be more aggressive behavior among mallards in urban than in rural habitats, based on the hypothesis that increased stress in an urban environment results in elevated aggression. Aggression was defined as the number of attacks, which was classified as chases, nips, and threats. I observed on average more than three times as many attacks (chases, nips and threats) in urban as in rural habitats. In addition, more females relative to males in the groups resulted in more attacks. Wild birds are important to flora, fauna, and man. Because high aggression can affect the fitness of wild urban animals negatively through, for example, physical injuries and increased disease transmission during fights, it is important that humans intervene to prevent this.<br>Den fortsatta ökande urbaniseringen förändrar vilda djurs naturliga habitat. Vissa vilda djur har koloniserat urbana områden och utsätts för nya stimuli som de responderar olika på: somliga arter anpassar sig medan andra frodas. Att leva i en sådan miljö kan leda till ökad stress och förhöjd aggression. Syftet med denna studie var att undersöka den intraspecifika aggressionen mellan gräsänder (Anas platyrhynchos) i två habitat med olika nivå av urbanisering. Fältobservationer genomfördes på grupper av gräsänder i urbana och rurala miljöer. Jag förväntade mig att det skulle förekomma fler utdelade attacker bland gräsänder i urbana än i rurala habitat, baserat på hypotesen att ökad stress i en urban miljö resulterar i förhöjd aggressivitet. Aggression definierades som antalet utdelade attacker, vilket klassificerades till jagningar, nyp och hot. Jag observerade i medel mer än tre gånger så många attacker (jagningar, nyp och hot) i urbana som i rurala habitat. Utöver detta resulterade fler honor relativt hanar i grupperna i fler attacker. Vilda fåglar är viktiga för flora, fauna och människa. Eftersom hög aggression kan påverka vilda urbana djurs fitness negativt genom till exempel fysiska skador och ökad sjukdomsöverföring vid strid, är det viktigt att människan ingriper för att förhindra detta.
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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 cada lagoa (semanalmente), por forma a avaliar o efeito do aumento de esforço de monitorização em relação a anos anteriores. Os resultados revelaram que a zona de estudo tem uma importância significativa como zona de invernada de aves aquáticas. Algumas espécies apresentam populações residentes estáveis que, sazonalmente, vêm o seu número de indivíduos variar com a chegada e partida de aves migradoras. Com o estudo da reprodução do Pato-real desejou-se obter informação útil para a administração desta relevante espécie cinegética. Para tal, procedeu-se à monitorização da população reprodutora na área de estudo. Sendo a barrinha uma zona de refúgio no período cinegético, de reprodução e de muda para a espécie, realizou-se uma avaliação do sucesso reprodutor e de predação de ninhos. Obteve-se uma taxa média de sucesso reprodutor de 37%. Os resultados relativos aos ninhos reais e ao estudo com ninhos simulados revelaram percentagens de predação de 57%.<br>Waterfowl monitoring in “Mira” Natura 2000 Site: a contribute towards their management. The aim of this work was to monitorize waterfowl populations and to study the reproduction of the Mallard (Anas platyrhynchos). The waterfowl monitoring was carried out to gather standardized information on monthly populations fluctuations in the 2 lagoons existent in the study area. This information is needed for proper management and wildlife conservation. The experimental design included 4 counts per month (one per week) in each lagoon, to allow an evaluation of the monitoring effort increase comparatively to past years. The results showed that the study area is an important wintering area for waterfowl. Some species have resident individuals, but their populations are dynamic and vary with the arrivals and departures of migratory birds. The aim of the Mallard reproduction study was to collect useful information to this important species management. Thus breeding bird surveys were conducted to this species, at the study area. As the Barrinha is a refugee area during the hunting season, a breeding and moulting area for the Mallard, a reproductive success survey and nest predation evaluation were developed. It was obtained an average rate of breeding success of 37%. The results relative to real nests surveys and the false nests study revealed about 57% of predation.
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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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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 elaborado, incluindo operações especializadas como produção, maturação e liberação de gametas, bem como a síntese de hormônios esteróides sexuais e comportamento sexual. O objetivo do estudo foi conhecer a morfologia testicular do pato doméstico (Anas platyhrynchos) e estabelecer seu ciclo reprodutivo anual, relacionando-o ao nível do hormônio testosterona e a alguns parâmetros do metabolismo energético interligados ao processo reprodutivo. Para isto foram utilizados 36 animais, sendo coletados testículos de 3 animais por mês, visando a descrição morfológica e o estabelecimento do ciclo reprodutivo anual da espécie por meio de microscopia de luz e análise morfométrica. Os espermatozóides foram analisados através de microscopia eletrônica de transmissão e de varredura. Os níveis de testosterona plasmática total foram dosados mensalmente por meio do ¿Kit Cout-A-Count (DPC)¿ e os níveis de glicose sangüínea pelo método colorimétrico. Também foram dosados o glicogênio hepático e muscular pelo método Glicogênio Trinder e lipídeos totais hepático e muscular pelo método de extração com solvente orgânico. O ciclo reprodutivo anual do pato doméstico é caracterizado por quatro fases distintas, se iniciando com a fase reprodutiva no começo do inverno (Julho) e com pico da reprodução na primavera (Outubro), apresentando maiores peso e volume testiculares, e maiores diâmetro dos túbulos seminíferos e altura do epitélio seminífero. A fase regressiva ocorre no final da primavera (Novembro) e início do verão (Dezembro). A fase de quiescência ou repouso testicular é observada durante o verão (Janeiro, Fevereiro), sendo sucedida pela fase de recrudescência que ocorre no outono (Março a Junho), correspondendo à fase mais longa do ciclo. O processo completo da espermatogênese em termos de maturação dos spermatozóides e a espermiação foram notados durante a fase reprodutiva, coincidindo com o pico de testosterona plasmática. Os espermatozóides são caracterizados pela presença de cabeça, curta peça intermediária e uma longa peça principal. No conjunto os espermatozóides são longos, filiformes e cilíndricos. O espermatozóide do pato doméstico é similar ao de outras aves nãopasseriformes correspondendo a um tipo básico de espermatozóide. Concernente ao metabolismo energético somente a glicose sangüínea estava correlacionada ao ciclo reprodutivo anual da espécie, fornecendo energia para o processo reprodutivo<br>Abstract: In birds, reproduction is a defined cyclic process; in which each year the reproductive organs grow and regress under the influence of environmental factors. During the process of gonadal maturation and reproduction, the organism of the animal intensively mobilizes energy. The reproductive process is well elaborated, including specialized operations such as the production, maturation and release of gametes, as well as the synthesis of sex steroid hormones and sexual behavior. The aim of the present study was to determine the morphology of the testes of the domestic duck (Anas platyrhynchos) and to establish its annual reproductive cycle, correlating it with testosterone levels and some parameters of energy metabolism associated with the reproductive process. Using a total of 36 ducks, testes were collected from 3 animals per month, and the morphology and annual reproductive cycle of the species were determined by light microscopy and morphometric analysis. Spermatozoa were analyzed by transmission and scanning electron microscopy. Total plasma testosterone levels were measured monthly using the Cout-A-Count (DPC) kit and blood glucose levels were determined by a colorimetric method. Hepatic and muscle glycogen was measured by the Trinder glycogen method and total hepatic and muscle lipids using extraction with organic solvents. The annual spermatogenic cycle of the domestic duck is characterized by four distinct phases, starting with the reproductive phase at the beginning of winter (July) and peak reproduction in spring (October), with higher testicular weight and volume, a larger seminiferous tubular diameter and greater seminiferous epithelium height being observed during these periods. The regressive phase occurs at the end of spring (November) and the beginning of summer (December). The phase of quiescence or testicular resting is observed during summer (January, February), followed by the phase of recrudescence that occurs in autumn (March to June), corresponding to the longest phase of the cycle. The complete process of spermatogenesis in terms of spermatozoon maturation and spermiation is noted during the reproductive phase, coinciding with peak plasma testosterone levels. The spermatozoa are long, filiform and cylindric and are characterized by the presence of a head, short middle piece and long principal piece. The spermatozoon of the domestic duck resembles that of other nonpasseriform birds, corresponding to the basic type of spermatozoon. Considering energy metabolism, only blood glucose was correlated with the annual reproductive cycle of the domestic duck, providing energy for the reproductive process<br>Doutorado<br>Anatomia<br>Doutor em Biologia Celular e Estrutural
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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 como uma ferramenta importante no controlo do vírus. O presente estudo baseia-se no programa de monitorização serológica incluído nos planos de vacinação de emergência e de vacinação preventiva implementados na sequência de um foco de gripe aviária de baixa patogenicidade, subtipo H5N2, ocorrido numa exploração cinegética nacional em Setembro de 2007. A vacinação com duas vacinas inactivadas bivalentes, H5N9/H7N1 e H5N6/H7N7, foi realizada em dois grupos de patos-reais. Posteriormente, foi realizada uma revacinação semestral num destes grupos. A vacinação induziu um título de anticorpos específicos para a hemaglutinina H5 similar nos dois grupos de patos primovacinados, acima do limiar considerado de protecção (4 log2) até pelo menos 16 semanas após a administração do reforço da vacina, tendo-se atingido uma taxa de imunização inicial superior a 80%. A revacinação semestral com o antigénio H5N6 induziu uma resposta humoral pouco exuberante, com persistência de anticorpos protectores apenas até 6 semanas após vacinação. O antigénio de subtipo H7N7 não estimulou o desenvolvimento de uma resposta imunitária humoral protectora para a hemaglutinina H7. Pelo contrário, o antigénio H7N1 induziu um título médio de anticorpos ligeiramente acima do limiar de protecção, que persistiu até pelo menos 26 semanas após o reforço da vacina. Os resultados observados sugerem que numa exploração cinegética deste tipo, em que o risco de contacto com o vírus “de campo” é muito elevado, a revacinação semestral com uma vacina adequada é uma medida complementar importante para limitar a ocorrência de focos secundários da infecção/doença.<br>ABSTRACT - Vaccination of Mallard Ducks (Anas platyrhynchos) against Avian Influenza in Portugal -- During the last decade, HPAI H5N1 has rapidly spread across Asia, Europe and Africa, leading to the culling of more than 250 million birds and the death of more than two hundred people, posing a serious threat to public health. Ducks, particularly, mallards (Anas platyrhynchos), play an important role in the amplification and spread of the virus. Vaccines that are effective in this species in field conditions will provide an important tool for control of the disease. This study is based on a serological monitoring programme included in the emergency and preventive vaccination plans applied following a LPAI H5N2 outbreak in a game bird holding in Portugal, in 2007. Vaccination with two bivalent, H5N9/H7N1 and H5N6/H7N7, inactivated vaccines was carried out in two groups of mallard ducks. A second vaccination, six months later, was also carried out in one of these groups. The first vaccination induced a similar mean antibody titer specific for H5 hemagglutinin in both groups, above the protective threshold (4 log2) and persistent for at least 16 weeks after the vaccine boost. The proportion of immunized ducks was initially above 80%. Ducks revaccinated six months later with the H5N6 vaccine showed a lower antibody response, which persisted for only 6 weeks after vaccination. The H7N7 vaccine antigen did not simulate a protective immune humoral response specific for H7 hemagglutinin. On the contrary, the mean antibody titers following vaccination with the H7N1 vaccine were slightly above the threshold, persisting for at least 26 weeks after the boost. These results suggest that semestral vaccination with an adequate vaccine is as important additional measure to limit secondary AI outbreaks in this type of farming system, which is at a particularly high risk of exposure to the field virus.
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Bücher zum Thema "Anas Platyrhynchos"

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Wang, Chün-wei. Untersuchungen zur Entwicklung zellulärer und hlumoraler Immunreaktionen bei Enten (Anas platyrhynchos, L., 1758). Hannover: [s.n.], 1998.

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Kotsios, Mae Melpomeni. Muscle metabolism during simulated forced dives in Pekin ducks (anas platyrhynchos) and neuromuscular blockers as a tool to test for the existence of a central motor. Ottawa: National Library of Canada, 1996.

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Lancaster, John Frederick. Inheritance of Plumage Colour in the Common Duck (Anas Platyrhynchos Linné). Springer London, Limited, 2013.

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Wünschmann, Almut. Experimentelle Untersuchung über die freiwillige Aufnahme von Angelblei durch Hausenten (Anas platyrhynchos, L. 1758). 1990.

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Schmedemann, Reiner. Zur Wirkung von Testosteron und Testosteron-Metabolismushemmern auf das Verhalten kastrierter Stockerpel (Anas platyrhynchos L.). Kiel, 1991.

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Kremer, Axel. Makroskopische, lichtmikroskopische, transmissions- und rasterelektronenmikroskopische Untersuchungen zum Blut- und Lymphsystem im Hoden des Pekingerpels . 1987.

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Rutherford, Gregory J. Development of an enzyme-linked immunosorbent assay to detect antibodies against Bacillus thuringiensis subspecies israelensis in Mallard ducks (Anas platyrhynchos). 1992.

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Rutherford, Gregory J. Development of an enzyme-linked immunosorbent assay to detect antibodies against Bacillus thuringiensis subspecies israelensis in Mallard ducks (Anas platyrhynchos). 1992.

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S. Kumar, D. Pangeni, X. Yang, and S.O. Park*. Effect of ascorbic acid in the drinking water and betaine in the diet on performance, blood haematology, IgG and HSP 70 gene expression in Pekin ducks (Anas platyrhynchos domesticus) reared under high temperatures. Verlag Eugen Ulmer, 2017. http://dx.doi.org/10.1399/eps.2017.177.

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Buchteile zum Thema "Anas Platyrhynchos"

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Guillemain, Matthieu, Pär Söderquist, Jocelyn Champagnon, and Johan Elmberg. "Mallard (Anas platyrhynchos Linnaeus, 1758)." In Invasive birds: global trends and impacts, 194–99. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789242065.0194.

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Abstract This chapter describes the common terminologies, taxonomy, morphology, geographical distribution, physiology, diet, behaviour, reproduction, habitats, ecology, invasion pathways, environmental impact, control and human use of the mallard (Anas platyrhynchos).
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Kaushik, Kumar Kritartha, and Bolin Kumar Konwar. "Gut Metagenomics of Pati Hanh (Anas platyrhynchos domesticus)." In Molecular Genetics and Genomics Tools in Biodiversity Conservation, 267–80. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6005-4_13.

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Bech, Claus, and Hege Johannesen. "Gas Exchange during Cold Exposure in Pekin Ducks (Anas Platyrhynchos)." In Physiology of Cold Adaptation in Birds, 163–72. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4757-0031-2_17.

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Adams, Bradley, and Pam Crabtree. "Duck ( Anas platyrhynchos )." In Comparative Osteology, 367–79. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-388437-4.00021-1.

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"Duck (Anas platyrhynchos)." In Encyclopedia of Genetics, Genomics, Proteomics and Informatics, 567. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6754-9_4939.

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SILVERMAN, SAM, LISA A. TELL, JODY NUGENT-DEAL, KRISTINA PALMER-HOLTRY, and KATHY WEST. "Mallard Duck (Anas platyrhynchos)." In Radiology of Birds, 203–26. Elsevier, 2010. http://dx.doi.org/10.1016/b978-072160635-4.50020-6.

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"4. Mallard Ducks Anas platyrhynchos." In Avian Cognition, 144–203. 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742: CRC Press, 2015. http://dx.doi.org/10.1201/b19850-5.

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Janiszewski, P., D. Murawska, A. Gugolek, M. Zawacka, and J. Folborski. "The eating quality of Mallards (Anas platyrhynchos L.)." In Book of Abstracts of the 66th Annual Meeting of the European Association for Animal Production, 182. Brill | Wageningen Academic, 2015. http://dx.doi.org/10.3920/9789086868162_193.

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Magnus, P. D. "Historical Individuals Like Anas platyrhynchos and ‘Classical Gas’." In Art and Abstract Objects, 108–24. Oxford University Press, 2013. http://dx.doi.org/10.1093/acprof:oso/9780199691494.003.0006.

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Janiszewski, P., D. Murawska, V. Hanzal, K. Tomaszewska, and B. J. Bartyzel. "Selected growth parameters of farm-raised Mallard (Anas platyrhynchos L.) ducklings." In Book of Abstracts of the 66th Annual Meeting of the European Association for Animal Production, 183. Brill | Wageningen Academic, 2015. http://dx.doi.org/10.3920/9789086868162_194.

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Konferenzberichte zum Thema "Anas Platyrhynchos"

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Plessl, Christof. "Heavy Metals in the Mallard Anas platyrhynchos from Eastern Austria." In Proceedings of the 18th International Conference on Heavy Metals in the Environment. openjournals ugent, 2016. http://dx.doi.org/10.21825/ichmet.71123.

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Vasilevich, F. I., E. A. Nikolaeva, I. I. Tsepilova, and K. V. Pikel. "ENDOPARASITIC FAUNA OF MALLARDS (ANAS PLATYRHYNCHOS) IN THE TVER REGION." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2025. https://doi.org/10.31016/978-5-6053355-1-1.2025.26.79-83.

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The issue of parasitosis in birds is relevant for zoos, nature reserves and poultry farms. Wild birds can serve as a source of invasions, since many helminth species are capable of parasitizing both domestic and wild birds. This builds the need to study the biodiversity of helminths parasitizing wild birds. The article considers the issue of endoparasitosis in the mallard (Anas platyrhynchos). The research purpose was to study the current helminth fauna in mallards in the Zavidovo National Park in the Tver Region. In the course of the study, we carried out partial helminthological dissections of organ complexes (glandular stomach, muscular stomach, small intestine, large intestine, liver, gall bladder, and heart) from 120 mallards. As a result of the dissections, 12 helminth taxa were identified (including the Cestoda, Trematoda, Acanthocephala, and Nematoda classes). The most common species was Filicollis anatis with a 43.3% invasion index. The total infection of the studied birds with helminths was 68.3%. The infection intensity varied from a few to two dozen specimens. Of 120 examined ducks, 38 were free from any infection, 52 had a monoinfection, and 19 had a mixed infection.
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Sivkova, T. N., and M. V. Khazova. "MORPHOMETRY OF CAPILLARIA EGGS IN THE MALLARD ANAS PLATYRHYNCHOS (LINNAEUS, 1758) IN PERM." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.378-382.

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Wild waterfowl are a natural reservoir of helminths and put domestic ducks, geese and some other species at risk of infection; however, studies on the spread of endoparasites among them were conducted rarely in the Perm Territory. Despite successes in gene diagnostics, helminth species determination by morphological characteristics remains the basic approach. We took 51 fecal samples from the mallard Anas platyrhynchos (Linnaeus, 1758) that winters in Perm. Such samples were studied in the Laboratory of Parasitology, the Department of Veterinary Medicine and Animal Technologies, the Perm State Agro-Technological University. We used the method of G. A. Kotelnikov and V. M. Khrenov with an ammonium nitrate solution, and sequential washing. The egg morphometric analysis was performed using the PhotoM 1.21 software (Russia). Among the total number of samples, eggs with Capillaria sp. morphology were found in 21 samples (prevalence, 41.18%). All identified eggs had the same parameters in size and length &amp; width ratio, which indicates they belonged to one species. According to literature descriptions, they correspond to eggs of Capillaria (Eucoleus) annulata (Molin, 1858), which is potentially dangerous to poultry.
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Huang, Kailiang, Jiwen Wang, Jing Jia, Jianmin Si, Liang Li, and Hehe Liu. "Cloning and Characterization of Duck (Anas Platyrhynchos) Myf5 Gene and Comparison with Other Vertebrates." In 2009 2nd International Conference on Biomedical Engineering and Informatics. IEEE, 2009. http://dx.doi.org/10.1109/bmei.2009.5301730.

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Li, Liang, Jing Jia, Jian-min Si, Kai-liang Huang, and Ji-wen Wang. "Cloning and Characterization of Duck (Anas platyrhynchos) MyoD1 Gene and Comparison with Other Vertebrates." In 2009 3rd International Conference on Bioinformatics and Biomedical Engineering (iCBBE 2009). IEEE, 2009. http://dx.doi.org/10.1109/icbbe.2009.5162509.

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Amosov, P. N., and N. A. Baburina. "Features of the nest material of mallards (Anas Platyrhynchos) of the city ponds of St. Petersburg." In ACTUAL PROBLEMS OF ECOLOGY AND ENVIRONMENTAL MANAGEMENT. Federal State Budgetary Educational Institution of Higher Education St. Petersburg State University of Veterinary Medicine, 2022. http://dx.doi.org/10.52419/3006-2022-3-4-6.

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"Angiosuppressive and Teratogenic Influence of an Edible Medicinal herb, Insulin plant (Costus igneus) in Mallard Duck (Anas platyrhynchos) Embryos." In Multi-Disciplinary Manila (Philippines) Conferences Jan. 26-27, 2017 Cebu (Philippines). Universal Researchers (UAE), 2017. http://dx.doi.org/10.17758/uruae.ae0117303.

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Bojar, H., and I. Bojar. "Assessment of the lead and cadmium contamination levels in the Lublin Region wetlands using mallards (Anas platyrhynchos) as a contamination vector." In ENVIRONMENTAL TOXICOLOGY 2008. Southampton, UK: WIT Press, 2008. http://dx.doi.org/10.2495/etox080151.

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Hüseynəli oğlu Rzayev, Fuad, and Eldar Köçəri oğlu Qasımov. "A systematic review of the parasites (Acanthocephala) of the domestic waterfowl." In I İNTERNATİONAL SCIENTIFIC CONFERENCE ON "FUNDAMENTALS OF MEDICAL SCIENCE". http://aem.az/, 2021. http://dx.doi.org/10.36719/2707-1146/2021/1/1.

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The article presents the information about a systematic review of parasitic worms – acanthocephalans of the domestic waterfowl. Based on our own and literature data, 12 acanthocephala species belonging to the 1 order, 1 family and 5 genera were identified in domestic ducks (Anas platyrhynchos dom.) and geese (Anser anser dom.). Three species of worms are found in domestic waterfowl in Azerbaijan. The acanthocephala Polymorphus magnus have been reported for the first time in Azerbaijan – Khachmaz region in both birds. Six species of acanthocephals parasitize only in anseriformes, and the remaining six species parasitize including other orders of birds (Ciconiiformes, Gruiformes, Galliformes, Podicipediformes, Gaviiformes, Falconiformes, Charadriiformes et al.) and even mammals (Rodentia, Carnivora). Of the registered acanthocephals, 3 species have a small area of distribution, and the remaining 9 species have a wide area. Each species is provided with the following data: scientific name, authority and year, synonyms, final, intermediate and auxiliary hosts, habitat in the bird body, collecting localities and geographic distribution, prevalence (PI) and intensity (II) of infection, literature sources. Keywords: geese, duck, acanthocephala, systematic review, area, hosts
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Sivkova, T. N., and D. A. Lokteva. "MICROMORPHOLOGICAL CHANGES IN PLANORBIS (MÜLLER, 1774) TISSUES IN EXPERIMENTAL INFECTION WITH MIRACIDIA COTYLURUS SP. (SZIDAT, 1928)." In THEORY AND PRACTICE OF PARASITIC DISEASE CONTROL. VNIIP – FSC VIEV, 2024. http://dx.doi.org/10.31016/978-5-6050437-8-2.2024.25.373-377.

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During their life cycle at larval development stages, trematodes use various molluscs as their first intermediate host, migrate and reproduce asexually in them causing various responses in the form of degenerative changes and inflammatory processes. The purpose of our research was to study histological pattern of tissues in the first intermediate hosts in response to miracidia infection. For this purpose, we performed a histological study of tissue samples of trumpet snails of the genus Planorbis (Müller, 1774) experimentally infected with miracidia Cotylurus sp. isolated from the mallard Anas platyrhynchos (Linnaeus, 1758) of the Perm population and stained by two methods, hematoxylin and eosin, and PAS (periodic acid Schiff reaction). It was found that there were areas of granulation tissue formation in the muscular layer of the leg, which was indicative of the scarring in this organ after mechanical action. Miracidium was also found during migration accompanied by muscle fiber separation and edema development in adjacent tissues. The planorbids’ organism reaction to Cotylurus infection was similar to changes in other related gastropods in response to any infective agent, regardless of its location.
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