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Rozprawy doktorskie na temat „Ducks”

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1

Bowman, Timothy Dale. "Ecology of male black ducks molting in Labrador /." Orono, Me, 1987. http://www.arlis.org/docs/vol1/A/17591492.pdf.

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2

Somerville, Alison Joan. "Advantages to late breeding in Ruddy ducks." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25045.

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Ruddy Ducks in the Chilcotin parklands of British Columbia nest in late June, July and early August, later than most other waterfowl species breeding in southwestern British Columbia, Canada. This thesis considers factors that may affect the timing of breeding in Ruddy Ducks by comparing Ruddy Ducks to Barrow's Goldeneye and Bufflehead (species that breed early but do not renest) and to American Coot (a species that breeds early and is able to renest). These factors include predation, flooding and desertion of nests, feeding behavior of ducklings, abundance of food, availability of green veget

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3

Davis, Jonas Ian. "Mallard nesting ecology in the Great Lakes." CONNECT TO THIS TITLE ONLINE, 2008. http://etd.lib.umt.edu/theses/available/etd-05272008-112947/.

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4

Gagnon, Christine. "Pathological consequences of infection by Cyathocotyle bushiensis Khan, 1962 and Sphaeridiotrema globulus (Rudolphi, 1814) in two species of dabbling ducks." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59282.

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Cyathocotyle bushiensis (Digenea) and Sphaeridiotrema globulus (Digenea) are gastrointestinal pathogens of waterfowl, and are known to co-occur in salvaged ducks. The intensity and time-dependent pathogenesis induced by single infections of the two digeneans, and concurrent infections were studied in two species of dabbling ducks. Gross tissue pathology by single C. bushiensis infection was found to be a function of both the intensity and the duration of infection. Infection with single species infections of C. bushiensis and S. globulus was associated with decreased weight gain, tendencies fo

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5

Hoeve, John. "Recurrent, late-summer mortality of dabbling ducks in Southern Quebec induced by the digeneans, Sphaeridiotrema globulus (Rudolphi, 1814) and Cyathocotyle bushiensis Khan, 1962." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66131.

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6

Pockley, Simon Charles Nepean. "The flight of ducks research report." [Melbourne] : S. Pockley, 1998. http://purl.nla.gov.au/nla/pandora/FOD.

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"Submitted by Simon Charles Nepean Pockley ... as a partial requirement for Degree of Doctor of Philosophy by Project 18th July, 1998". "WARNING culturally sensitive material". Available [on line] http://www.cinemedia.net/FOD/FOD0043.html Archived at ANL http://purl.nla.gov.au/nla/pandora/FOD http Text, graphics, sound and animation The Flight of ducks is a multi-purpose on-line work built around a collection of archival material from a camel expedition into the central Australian frontier in 1933. This journey was revisited in 1976 and retraced in 1996."- leaf 1.

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7

Warnock, Jeffrey P. "Ducks, cups, bushes, planters, and statues." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1382711430.

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8

Benlashehr, Imad. "Fumonisin toxicity in ducks and turkeys." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0070/document.

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Les fumonisines (FBs) sont les principales mycotoxines produites par Fusarium verticillioides et Fusarium proliferatum, qui se retrouvent partout dans le monde dans le maïs et ses produits dérivés. Les doses toxiques et les signes cliniques de toxicité provoqués par les FBs varient dune espèce à lautre. La toxicité des FBs est généralement liée à leur capacité à bloquer le métabolisme des sphingolipides chez les espèces animales, y compris chez les espèces aviaires. De précédentes études ont démontré que les canards présentent une plus grande sensibilité à la toxicité des FBs que les dindes, a

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9

Smith, Cyndi. "Survival and recruitment of juvenile Harlequin Ducks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/MQ51472.pdf.

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10

Farhat, Antoine G. "Nutritional evaluation of industrial food wastes in ducks diets." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0006/MQ29689.pdf.

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11

Furilla, Robert Alan. "Control of heart rate during diving in ducks." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/27077.

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Forced submergence of redhead ducks (Aythya americana) caused heart rate to fall from 100 ± 3 beats⋅min⁻ ¹ (mean ± s.e.m., N = 12) to a stable rate of 35 ± 4 beats⋅min⁻ ¹ (N = 12) within 5 seconds after submergence. Bradycardia was unaffected by breathing oxygen before the dive or by denervation of the baroreceptors, but was virtually eliminated by local anaesthesia of the narial region. When freely diving on a man-made pond, heart rate of redhead ducks and lesser scaup (A. affinis) two seconds after submergence was positively correlated with the pre-dive rate (r² = 0.71). Breathing o

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12

Reichart, Letitia Marie. "Conspecific brood parasitism in ruddy ducks (Oxyura jamaicensis)." Online access for everyone, 2008. http://www.dissertations.wsu.edu/Dissertations/Summer2008/L_Reichart_072408.pdf.

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13

Martinho, Antone. "Ducks and decussation : information in the avian brain." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:342aeaab-726a-4410-b417-2d2d8115675a.

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A vertebrate brain must acquire, store, and process vast amounts of information. For birds, the majority of the incoming sensory information is visual, and like all vertebrates - except eutherian mammals - their visual system is bifurcated, with each eye feeding incoming information to the contralateral brain hemisphere. As a result, the bird must integrate these two banks of information to produce unified responses. This arrangement raises several questions about how a bird acquires, manages, and represents incoming visual information, and this thesis explores three of these questions. First,

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14

Silverman, Emily Davies. "Ducks in the muck : models of waterfowl aggregation /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/6376.

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15

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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16

Men, Bui Xuan. "Feeding and management systems for smallholder duck production in the Mekong Delta of Vietnam /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009768689&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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17

DiBona, Matthew T. "Seasonal food availability for wintering and migrating dabbling ducks and its implications for management at the Hackensack Meadowlands of New Jersey." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 104 p, 2008. http://proquest.umi.com/pqdweb?did=1459904201&sid=12&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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18

Evans, Darren Mark. "The ecology and spatial dynamics of wintering waterfowl on Lough Neagh." Thesis, University of Ulster, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268567.

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19

Henderson, Jane Victoria. "Flocking behaviour of ducks in response to predator stimuli." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284861.

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20

Lavallée, Sophie. "Application of ultrasound technology for selection and production of lean Pekin ducks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape10/PQDD_0002/MQ44202.pdf.

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21

Manson, Fiona J. "Life history traits, social mating system and genetic variation in the buff-banded rail Gallirallus philippensis on Heron island /." St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17757.pdf.

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22

Ménard, Louise. "Aspects of the ecology of the larval stages of Cyathocotyle bushiensis Khan 1962 (Digenea)." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66176.

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23

Lepitzki, Dwayne Allen William. "Epizootiology and transmission of snail-inhabiting metacercariae of the duck digeneans Cyathocotyle bushiensis and Sphaeridiotrema globulus." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41160.

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Cyathocotyle bushiensis and Sphaeridiotrema globulus were previously implicated in the annual mortality of wild ducks in southern Quebec. Of 21 snail species collected from nine aquatic communities in southern Quebec and southeastern Ontario, May to October 1989 and 1990, only Bithynia tentaculata was heavily and consistently infected with C. bushiensis metacercariae. Although infection levels varied spatially, a consistent concave seasonal pattern of prevalence and abundance was found which may be due to overwintering metacercariae and the almost simultaneous onset of cercarial transmission a

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24

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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25

Robertson, Gregory J. "Pair formation, mating system, and winter philopatry in Harlequin Ducks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24345.pdf.

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26

Robb, Joseph Russell. "Physioecology of staging American black ducks and mallards in autumn /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487943610783118.

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27

Perry, Cahanin Jacqueline Marie. "Abundance and Habitat Preferences of Introduced Muscovy Ducks (Cairina moschata)." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6741.

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Muscovy ducks are native only to Central and South America, Mexico, and parts of southern Texas and are considered invasive in some areas outside of their native range. Although they have been introduced worldwide, they remain largely unstudied. The primary focus of this study was to relate Muscovy duck abundance to habitat characteristics of wetlands in Tampa, Florida. Muscovy abundance was measured using point count methods at 21 wetland sites that occur within an eight km radius of the University of South Florida’s main campus. Habitat features at these sites were assessed using field metho

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28

Farhat, Antoine G. "Growth and IGF-I response to breast muscle selection by ultrasound and dietary protein programs in Pekin ducks." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ55327.pdf.

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29

Eamer, Joan. "Winter habitat for dabbling ducks on southeastern Vancouver Island, British Columbia." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24634.

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This study is an examination of the use of coastal estuaries and nearby farmland as habitat by dabbling ducks (mallard and American wigeon) during migrating and wintering periods. Its aim was to identify aspects of British Columbia coastal habitat of importance to dabblers through an analysis of the ducks' movements among habitat types and through a description of where and on what ducks feed. Data were collected in 1979 and 1980 along a 30 km stretch of coastline on southeastern Vancouver Island. Results are presented in 3 parts. Part 1 examines the relative use of farm and coastal habitat t

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30

Heieis, Mark Rudolf Alois. "Blood volume distribution in and bioenergetics of swimming and diving ducks." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26417.

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Blood flow distribution during forced and voluntary diving in ducks, and the energetic cost of diving was investigated. It has been suggested that in order for the leg muscles to generate enough power for ducks to dive, blood flow to those tissues must be maintained. A technique to determine blood flow distribution which could be used during voluntary diving was first developed and tested during forced laboratory dives of ducks. This technique was then used to determine the blood flow distribution during voluntary diving. Regional blood flow distribution was visualized by utilizing a radioac

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31

Gunness, Michelle A. "Nest defence by female dabbling ducks, life history and methodological considerations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ36929.pdf.

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32

Tisdall, Carol. "Aggression among captive mallards and black ducks during the breeding season." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23302.

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The behaviour of captive mallards (Anas platyrhynchos) and black ducks (Anas rubripes) was studied from the end of March to mid-June in 1991 and 1992 to determine the extent of interspecific aggression exhibited and the effect of sympatry and allopatry on interactions between the two species.<br>Mallards were more aggressive than black ducks regardless of sex and origin, though both species were equally attacked in both years, male ducks were more aggressive and more attacked than female ducks regardless of species and origin in both years, and ducks of sympatric origin were more aggressive th

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33

Carrière, Suzanne. "Habitat selection by sympatric black ducks and mallards in Abitibi, Quebec." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59984.

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Habitat use by sympatric black ducks (Anas rubripes) and mallards (A platyrhynchos) was studied in Abitibi, Quebec during May-August 1988 and 1989.<br>Black duck broods preferred emergent and shrub-rich areas in both years. Mallard broods' habitat use differed from 1988 to 1989 (from emergent to shrub-emergent areas) when average water levels were higher. Diversity of habitats seems more important to rearing black ducks than to mallards. Rearing mallards seem to modify their use of habitats according to changing habitat availability. Daily survival rates differed only slightly between "species

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34

Ross, Ben Paul. "Manipulation of the feeding behaviour of diving ducks on mussel farms." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342005.

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35

Nelson, Joel Thomas. "The Genomics of Speciation within the Globally Distributed Blue-Winged Ducks." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1463854966.

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36

Carter, S. P. "Studies of the Goosander Mergus merganser." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6578/.

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This thesis describes a series of studies to investigate the predator-prey relationships between the Goosander Mergus merganser, a fish-eating duck, and populations of game fish in northern Britain. The distribution and numbers of birds during the breeding season, in northern England and Scotland, were investigated and variations in density, between and within rivers, studied. Relationships between densities in spring and summer survey periods were also investigated. Possible biases in survey data are discussed. Studies of the growth of ducklings reared in captivity allowed estimates to be mad

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37

Laguë, Sabine Lina. "Cardiorespiratory responses to hypoxia in high- and low-altitude geese and ducks." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/58484.

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High-altitude (HA) life is challenging due to the reduced partial pressure of oxygen (hypoxia). Hence, HA vertebrates have evolved increased capacities in their oxygen transport cascade enhancing oxygen transfer. The extent of interspecies variation in these responses within waterfowl, a taxon prolific at HA, remains largely unknown. This thesis investigated 17 waterfowl groups at different altitudes to address the overarching hypotheses that waterfowl use multiple cardiorespiratory strategies to maintain oxygen supply during hypoxia, and that HA exposure alters the waterfowl hypoxic ventilato

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38

Mutumi, Gregory Lilgee. "Using stable isotopes to trace the movements of ducks in southern Africa." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/9801.

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Includes bibliographical references.<br>Despite the importance of movement ecology studies, the field faces a prevailing challenge of methodological limitations in tracking individual organisms. This research investigated the utility of the stable isotope technique to trace movements of ducks in southern Africa. I sampled and analysed feathers of ten duck species for stable isotope proportions of Carbon (δ13C), Nitrogen (δ15N) and Hydrogen (δD), from five wetlands (Strandfontein and Barberspan in South Africa, the Manyame catchment in Zimbabwe, Lake Chuali in Mozambique, and Lake Ngami in Bots

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39

Kruse, Tamara. "Field Use of Alfaxalone and Potential Complications in Mallard Ducks (Anas platyrynchos)." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563491829618893.

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40

Morton, John. "Habitat use and energetics of American black ducks wintering at Chincoteague, Virginia." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/53147.

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The habitat use and energetics of American black ducks (Anas rubripes) wintering at Chincoteague National Wildlife Refuge, Virginia, were investigated. Twenty-two female black ducks were systematically radiotracked on the 25,600 ha study area between 15 December 1985 and 28 February 1986. Diurnal time and energy budgets were constructed by distributing 1,471 scans (collected in 1985-86 and 1986-87) over a time-tide matrix within refuge, saltmarsh, and tidal water habitats. Sixty-four ducks were collected during early, mid, and late winter in 1985-86 to determine changes in carcass composition.

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41

Wendt, John Stephen Carleton University Dissertation Biology. "Population dynamics of ducks in Canada; the ratio of immatures to adults." Ottawa, 1985.

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42

Gammonley, James H. "Seasonal use of Montane wetlands by waterbirds on the rim of the Colorado Plateau /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9712801.

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43

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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44

Rhodes, Walter E. "Habitat use by juvenile female canvasbacks wintering on the upper Chesapeake Bay." Thesis, This resource online, 1989. http://scholar.lib.vt.edu/theses/available/etd-03122009-040719/.

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45

Hunt, William Andrew. "The ecology of harlequin ducks, Histrionicus histrionicus, breeding in Jasper National Park, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq37555.pdf.

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46

Fernando, Raniero. "Brood parasitism and genetic parentage in Goldeneye ducks, an analysis using DNA fingerprinting." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0027/MQ51602.pdf.

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47

Hewitson, Stacy. "Habitat selection by breeding American black ducks (Anas rubripes) in northeastern Nova Scotia." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22739.

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Habitat selection by breeding black ducks (Anas rubripes) was studied in Antigonish County, Nova Scotia during April-September 1990 and 1991.<br>Black duck pairs selected deciduous shrub ponds and sparsely vegetated ponds and avoided estuarine marsh and large lake habitat. Hens with broods preferred the deciduous shrub habitat while they avoided large lakes.<br>Black duck pairs appeared to use the distance to a brood-rearing pond as a cue in site selection. The closer a pond was to a suitable rearing pond the more likely it was occupied by a pair, regardless of food or cover resource availabil

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48

Marshall, Ann Patterson. "The behavior of Laysan ducks (Anas laysanensis) in captivity and on Laysan Island /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487670346874209.

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49

Behney, Adam Christopher. "FORAGING BEHAVIOR OF DUCKS DURING SPRING MIGRATION IN THE WABASH RIVER REGION, ILLINOIS." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/dissertations/937.

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Strategies animals use to find and consume food in the face of conflicting forces such as competition and predation are central questions in the fields of ecological theory and management. Whereas theoretical models abound, proper empirical tests of these theories are less abundant. In studying the relationship between food abundance, predation risk, and competition there exists an array of confounding factors, which need to be accounted for by manipulating some aspect of the system. I used a guild of spring migratory ducks as a model system and manipulated food abundance in areas differing

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50

Lindstrom, John Michael. "Effect of habitat management on dabbling ducks during spring migration in southwest Indiana." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2118.

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Historically, management for migratory waterfowl was focused around providing hunting opportunity each fall. More recently habitat during spring migration has received attention as a potentially limiting factor for some species of waterfowl, considering the carry-over effects that have been observed in both capital and income breeders. Habitat needs have been compounded by the flashy flood events that now occur in the highly modified landscape. The discovery of carry-over effects has led to an increase in habitat management actions and a diversification of available management strategies. In m

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