Relevant bibliographies by topics / Grey duck

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Academic literature on the topic 'Grey duck'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Grey duck"

1

Gillespie, Grant D. "Hybridization, Introgression, and Morphometric Differentiation between Mallard (Anas platyrhynchos) and Grey Duck (Anas superciliosa) in Otago, New Zealand." Auk 102, no. 3 (1985): 459–69. http://dx.doi.org/10.1093/auk/102.3.459.

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Abstract Small numbers of Mallard (Anas platyrhynchos) were introduced into New Zealand from Great Britain and North America over 100 years ago. Both sexes have undergone differentiation in size and plumage characters as a consequence of hybridization with the indigenous Grey Duck (A. superciliosa). Pure forms of both species, as documented by early descriptions, appear to be disappearing, particularly the Grey Duck. In Otago, the Mallard and Grey Duck are introgressively hybridizing, and the majority of intergrades are Mallard-like in appearance. Separation of Mallards, hybrid birds, and Grey
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Kingsford, RT, J. Flanjack, and S. Black. "Lead Shot and Ducks on Lake Cowal." Wildlife Research 16, no. 2 (1989): 167. http://dx.doi.org/10.1071/wr9890167.

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We determined the amount of lead shot left after shooting, in the sediment and also the occurrence of lead shot in the gizzards of waterfowl shot at Lake Cowal. We also investigated levels of lead in livers. Livers and gizzards of 342 ducks, Pacific black duck (96), grey teal (122), maned duck (102), pink-eared duck (15) and Australasian shoveler (7), were collected during the 1987 duck shooting season. Few birds had ingested shot (1.5%). Black ducks had more grit, the size of shot, in their gizzards than did grey teal or maned duck. Total grit contents in the gizzards were of a similar weight
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Crome, FHJ. "An Experimental Investigation of Filter-Feeding on Zooplankton by Some Specialized Waterfowl." Australian Journal of Zoology 33, no. 6 (1985): 849. http://dx.doi.org/10.1071/zo9850849.

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A study was made of the filtering ability and anatomy of the mouthparts of 4 species of waterfowl: pink-eared duck, Australasian shoveler, freckled duck and grey teal. The first 3 are highly specialized for filter-feeding on zooplankton whereas the last is a more generalized anatid. The pink-eared duck and Australasian shoveler have the filtering lamellae on the bills variously elaborated, whereas the grey teal is similar to published descriptions of the mallard. The freckled duck has bill features more characteristic of flamingoes. On the basis of anatomy it was predicted that pink-eared duck
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Marshall, Michael. "Duck-billed dinosaurs may have been grey." New Scientist 245, no. 3265 (2020): 12. http://dx.doi.org/10.1016/s0262-4079(20)30101-9.

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Wickson, RJ, FI Norman, GJ Bacher, and JS Garnham. "Concentrations of lead in bone and other tissues of Victorian waterfowl." Wildlife Research 19, no. 2 (1992): 221. http://dx.doi.org/10.1071/wr9920221.

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The concentrations of lead in wing bones of Victorian waterfowl were determined from samples collected mainly during the opening weekend of the 1990 duck-hunting season. Of about 7000 wings collected, 1134 (of 12 species and from wetland collection sites throughout the State) were subsampled for analysis. Although lead concentrations in bone were low in some species (e.g. chestnut and grey teal, freckled duck), higher concentrations were found in some small samples of diving ducks and in Pacific black duck. Tissues of Pacific black duck from one major hunting area indicated exposure to lead. O
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Morton, SR, KG Brennan, and MD Armstrong. "Distribution and Abundance of Ducks in the Alligator Rivers Region, Northern Territory." Wildlife Research 17, no. 6 (1990): 573. http://dx.doi.org/10.1071/wr9900573.

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Aerial surveys between 1981 and 1984 were used to identify monthly trends in the abundance of wandering whistling-duck Dendrocygna arcuata, plumed whistling-duck D. eytoni, radjah shelduck Tadorna radjah, Pacific black duck Anas superciliosa, and grey teal A. gibberifrons on five floodplains of the Alligator Rivers region, 250 km east of Darwin in the monsoonal north of the Northern Territory. Ground surveys were conducted during the same period on one of the floodplains, the Magela plain, to provide more detailed information. The Magela floodplain was inhabited by few ducks during the wet sea
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Bulgarella, Mariana, Mathieu Quenu, Lara D. Shepherd, and Mary Morgan-Richards. "The ectoparasites of hybrid ducks in New Zealand (Mallard x Grey Duck)." International Journal for Parasitology: Parasites and Wildlife 7, no. 3 (2018): 335–42. http://dx.doi.org/10.1016/j.ijppaw.2018.09.005.

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M. Rhymer, Judith, Murray J. Williams, and Richard T. Kingsford. "Implications of phylogeography and population genetics for subspecies taxonomy of Grey (Pacific Black) Duck Anas superciliosa and its conservation in New Zealand." Pacific Conservation Biology 10, no. 1 (2004): 57. http://dx.doi.org/10.1071/pc040057.

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Subspecies delineations may not reflect actual intraspecific diversity; an issue that becomes important when conservation of populations and/or subspecies that face severe declines is involved. The Grey Duck in New Zealand is considered a separate subspecies Anas superciliosa superciliosa from the Pacific Black Duck A. s. rogersi of Australia, even though poorly differentiated morphologically. Because the New Zealand and Australian populations of A. superciliosa are considered taxonomically distinct, the decline of New Zealand's Grey Duck and its hybridization with the introduced Mallard A. pl
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Suryana, NFN, R. R. Noor, P. S. Hardjosworo, and L. H. Prasetyo. "Karakteristik Fenotipe Itik Alabio (Anas platyrhynchos Borneo) di Kalimantan Selatan." Buletin Plasma Nutfah 17, no. 1 (2016): 61. http://dx.doi.org/10.21082/blpn.v17n1.2011.p61-67.

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<p>The Phenotypic Characteristics of Alabio Duck (Anas platyrhynchos Borneo) in South Kalimantan. A study on phenotypic characters was carried out to identify Alabio duck (Anas platyrhynchos Borneo) being kept by smallholder. This research was conducted at Hulu Sungai Selatan (HSS), Hulu Sungai Tengah (HST) and Hulu Sungai Utara (HSU), South Kalimantan from May until November 2009. Six hundred (75 males and 525 females) the duck used in this study was Alabio duck ranged from 5-5.5 months old. The observed parameters were plumage color, color feature, plumage shine, the color of bill, fee
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Ranade, Sachin P., and Vibhu Prakash. "Nesting of Lesser Whistling-Duck Dendrocygna javanica (Horsfield, 1821) (Aves: Anseriformes: Anatidae) and broken-wing distraction display at Kamrup District, Assam, India." Journal of Threatened Taxa 8, no. 5 (2016): 8824. http://dx.doi.org/10.11609/jott.2817.8.5.8824-8826.

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We observed 13 nesting attempts of the Lesser Whistling-Duck during 2011–2014 at Rani, Kamrup District in Assam, India. Failure in egg laying by the ducks and nest raiding by Grey Mongoose were recorded, while the breeding success was 38.5%. For the first time we witnessed broken wing distraction display exhibited by this species as an anti-predator strategy, which we have recorded here.
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Dissertations / Theses on the topic "Grey duck"

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Muller, Wiebke. "Hybridisation, and the Conservation of the Grey Duck in New Zealand." Thesis, University of Canterbury. Biological Sciences, 2008. http://hdl.handle.net/10092/5056.

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Hybridisation is increasingly acknowledged as a conservation problem. The widespread hybridisation between grey duck (Anas superciliosa) and mallard (A. platyrhynchos) in New Zealand is a good example of a native species hybridising with a foreign one, and forms the main focus of this thesis. Mallards were introduced into New Zealand from Europe, and hybrids were soon observed. I surveyed the extent of the hybridisation on the West Coast of the South Island and found that, based on phenotype, at least half of population is now hybrids. Mallards and mallard-like hybrids dominate in the eastern
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Steiner, Shep. "Cotton duck canvas and the gray flannel suit : the material dialectics of American formalism." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/31570.

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This thesis is concerned with art and culture in America from 1948 to 1955, primarily a period bound shift in the aesthetic practice of modernism which would result in the stain painting of Morris Louis. The purpose of this thesis is to trace the shift in cultural values which would promote the emergence and development of this new paradigm, that is to link a wider social and cultural progenesis of change to its formal articulation upon a highly aestheticized abstract canvas. Clement Greenberg's position in these negotiations is crucial. For him, the formal qualities of stain painting resonat
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Books on the topic "Grey duck"

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The South's last boys in gray: An epic prose elegy : a substudy of sunset and dusk of the Blue and the Gray. Bowling Green State University Popular Press, 1986.

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Gray, Kes. You do! Bodley Head, 2003.

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Gray, Kes. You do! Harry N. Abrams, Inc., 2006.

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Cohen, Octavus Roy. Gray Dusk. Black Curtain Press, 2018.

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Meg and Greg: A Duck in a Sock. Orca Book Publishers, 2020.

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Gray, Kes. You Do!: A Daisy Book. Abrams Books for Young Readers, 2006.

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Matzko, Paul. The Radio Right. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190073220.001.0001.

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By the early 1960s, and for the first time in history, most Americans across the nation could tune their radio to a station that aired conservative programming from dawn to dusk. People listened to these shows in remarkable numbers; for example, the broadcaster with the largest listening audience, Carl McIntire, had a weekly audience of twenty million, or one in nine American households. For the sake of comparison, that is a higher percentage of the country than would listen to conservative talk radio host Rush Limbaugh forty years later. As this Radio Right phenomenon grew, President John F.
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Book chapters on the topic "Grey duck"

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"Grez, Near Dusk." In First Nights. Princeton University Press, 2017. http://dx.doi.org/10.1515/9781400883370-016.

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"GREZ, NEAR DUSK." In First Nights. Princeton University Press, 2016. http://dx.doi.org/10.2307/j.ctvc7733c.18.

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Wilde, Oscar. "The Devoted Friend." In The Complete Short Stories. Oxford University Press, 2010. http://dx.doi.org/10.1093/owc/9780199535064.003.0010.

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One morning the old Water-rat put his head out of his hole. He had bright beady eyes and stiff grey whiskers, and his tail was like a long bit of black india-rubber. The little ducks were swimming about in the pond, looking just like...
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Stowe, Harriet Beecher. "Eliza’s Escape." In Uncle Tom's Cabin. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199538034.003.0010.

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Eliza made her desperate retreat across the river just in the dusk of twilight. The gray mist of evening, rising slowly from the river, enveloped her as she disappeared up the bank, and the swollen current and floundering masses of ice presented a hopeless barrier...
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Lorbiecki, Marybeth. "All in the Family." In A Fierce Green Fire. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199965038.003.0021.

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If you amble through the curving lanes of Burlington’s Aspen Grove Cemetery, designed by Aldo’s Grandfather Starker, you will come upon the Starker family vault nestled on a woody knoll. Pines and oaks guard simple stones inset in the grass marking the graves of Aldo and Estella. Aldo had returned to the land and family that had first instilled the land ethic within him. Then Clara Leopold died within a few months of her beloved eldest. Marie, Carl, and Frederic Leopold remained active in Burlington and in local conservation, with Fred becoming nationally renowned for his work with wood ducks. Thankfully for Estella, shortly after losing her husband, new grandbabies arrived on the scene, with new children for Luna and his wife Carolyn, Nina and her husband Bill, Carl and his wife Keena (Starker and Betty also had a child born that year). Though bowed by grief, Estella was made of the same strong stuff as her New Mexican ancestors, and after a few years, she slowly built back her life, now solo. Nina recalled, “Mother grew into her own person,” even traveling to Cuba and to Germany with her family. But Estella also continued to tend to the Shack land, as it tended to her. “Cultured, gentle, talented” as the Madison Free Press described “Stella”, she started to speak out publicly about local conservation issues while kindly serving as “an adopted grandmother” and mentor to graduate students and neighbors. In 1973, Northland College awarded Mrs. Estella Bergere Leopold an honorary doctorate of science. The degree was presented to her at the familiar haunts of the Wildlife Ecology Department. About two years later, in January 1975, on a visit to her family in Santa Fe, Estella grew ill and died at the age of eighty-five, a couple of days after her husband’s birthday. Her burial in Burlington next to Aldo, her sister Dolores, and twice brother-in-law, Carl, symbolized the integral intertwining of the Leopold and Luna-Otero-Bergere families.
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Revki, Andrew C. "The Environment." In A Field Guide for Science Writers. Oxford University Press, 2005. http://dx.doi.org/10.1093/oso/9780195174991.003.0040.

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Hindsight is usually expressed in bravado-tinged phrases. “You have it so easy now” is one. But when scanning the recent history of environmental news, the impression is just the opposite. A few decades ago, anyone with a notepad or camera could have looked almost anywhere and chronicled a vivid trail of despoliation and disregard. Only a few journalists and authors, to their credit, were able to recognize a looming disaster hiding in plain sight. But at least it was in plain sight. The challenges in covering environmental problems today are far greater, for a host of reasons. Some relate to the subtlety or complexity of most remaining pollution and ecological issues now that glaring problems have been attacked. Think of non-point-source pollution, such as runoff from countless farm fields or urban lawns, and then think of the ultimate point of the Exxon Valdez, spilling its heavy load of crude oil into the seas off the Alaskan coast. A little reflection is useful. Most journalists of my generation were raised in an age of imminent calamity. Cold War “duck and cover” exercises regularly sent us to the school basement. The prospect of silent springs hung in the wind. We grew up in a landscape where environmental problems were easy to identify and describe. Depending on where you stood along the Hudson River's banks, the shores were variously coated with adhesive, dyes, paint, or other materials indicating which riverfront factory was nearest. And, of course, the entire river was a repository for human waste, making most sections unswimmable. Smokestacks were unfiltered. Gasoline was leaded. Then things began to change. New words crept into the popular lexicon—smog, acid rain, toxic waste. At the same time, citizens gained a sense of empowerment as popular protest shortened a war. A new target was pollution. Earth Day was something newspapers wrote about with vigor, not an anachronistic, even quaint, notion. Republican administrations and bipartisan Congresses created a suite of laws aimed at restoring air and water quality and protecting wildlife. And, remarkably, those laws began to work. Right through the 19805 the prime environmental issues of the day—and thus the news—continued to revolve around iconic incidents, mainly catastrophic in nature.
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Cumbler, John T. "From Milling to Manufacturing From Villages to Mill Towns." In Reasonable Use. Oxford University Press, 2001. http://dx.doi.org/10.1093/oso/9780195138139.003.0006.

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The new world of New England was one of factories and factory towns, as well as farms and forests. It was a world where farmers, looking to those factory towns for markets, plowed their fields deep and intensively managed their land. It was a world where lumbermen stripped mountainsides of their forest cover to meet the cities’ growing appetite for lumber. It was a world of managed and controlled nature. It was also a world of rapid change, and increasingly after 1800, the force behind that change was the coming of the manufacturing mills. Levi Shepard’s 1788 duck-cloth factory was of a different type than the traditional mills of New England. Although mills that spun or fulled cloth had long been part of rural New England, Levi Shepard had a different market in mind when he encouraged local farmers to bring him their flax. Shepard wanted to take material from the countryside and, with the help of “workers employed,” “manufacture” it into a commodity for sale. Shepard’s decision to focus on manufacturing for distant markets represented a new world. Manufacturing in rural New England began small. And although it made a huge impact on travelers such as Timothy Dwight, it grew out of, while at the same time it transformed, traditional rural society. The processing of goods of the countryside was an integral part of traditional New England life, whether in 1650 or 1800. In 1790, the Hampshire Gazette commented that although “a large quantity of woollen cloth are made in private families and brought to market in our trading towns, a great part of [the woollen cloth] is not calculated for market.” The shift from milling produce for local use to manufacturing occurred initially for most of rural New England with the shift of small traders, merchants, and millers from processing for local farmers to processing for external markets. Edmund Taylor of Williamsburg on the Mill River, for example, at the turn of the century added carding and picking machines to his gristmill. As he did for grain, Taylor processed the material from the countryside, keeping a portion of it as his pay.
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Worster, Donald. "Paths Across the Levee." In Wealth of Nature. Oxford University Press, 1994. http://dx.doi.org/10.1093/oso/9780195092646.003.0005.

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In 1821 a man came exploring across the prairies and plains of the North American continent. His name was Jacob Fowler, and with his companions he would be the first Euro-American to ascend the whole length of the Arkansas River from what is now Fort Smith, Arkansas, to the Rocky Mountains. After eight days of poling against the current, “we stoped,” he writes in his untutored spelling, “at the mouth of a bold sreem of Watter” emptying into the Arkansas, a tributary about seventy feet wide. They followed that stream north through the sand hills that cover part of present-day Reno and Rice counties in the state of Kansas. Only a few cottonwood trees grew along its banks, affording scant shelter from the big sky, but the bluestem grass was so high one could not see the river ahead as it meandered across the prairie. Beyond the rich moist bottomlands the vegetation became buffalo grass, and the bison grazed there in black, drifting multitudes; the local Indians called the stream after the female bison, a name that became “Cow Creek” in the white man’s tongue. There were pronghorn antelopes in those days, so light and agile, counterpointing the shaggy herds. Fowler and his crew might also have seen deer, elk, coyotes, and dense flocks of ducks and geese. Then, their curiosity satisfied and their senses pleased, they pushed on west. Fowler had no idea that almost three centuries earlier another European, Don Francisco Vásquez de Coronado, had come here from the opposite direction, crossing this very same Cow Creek on his quest for the fabled city of Quivira. Coronado found in the vicinity only the Wichita Indians living in domed huts thatched with grass, but he did remark that . . . the country itself is the best I have ever seen for producing all the products of Spain, for besides the land itself being very fat and black, and being very well watered by the rivulets and springs and rivers, I found prunes like those of Spain and nuts and very good sweet grapes and mulberries. . . .
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Conference papers on the topic "Grey duck"

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Jaensch, S., T. Emmert, C. F. Silva, and W. Polifke. "A Grey-Box Identification Approach for Thermoacoustic Network Models." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-27034.

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This work discusses from a system theoretic point of view the low order modeling and identification of the acoustic scattering behavior of a ducted flame. In this context, one distinguishes between black-box and grey-box models. The former rely on time series data only and do not require any physical modeling of the system that is to be identified. The latter exploit prior knowledge of the system physics to some extent and in this sense are physically motivated. For the case of a flame stabilized in a duct, a grey-box model is formulated that comprises an acoustic part as well as sub-models fo
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Li, Gengyao, and Chao Yang. "Inversion of the surface duct from radar sea clutter using the improved grey wolf optimization." In 2020 IEEE Asia-Pacific Microwave Conference (APMC 2020). IEEE, 2020. http://dx.doi.org/10.1109/apmc47863.2020.9331595.

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Liu, Yao-Hsien, Chia-Cheng Lin, and Chiao-Hsin Chen. "Droplet Size Characterization for Mist Flow in a Single-Side Heated Vertical Square Duct." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21416.

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Cooling with mist flow can achieve higher heat transfer rates to meet the cooling requirements in recent industry applications. The mist flow was produced by introducing the dispersed water droplets in the air stream, and was used for cooling a heated surface in a vertical square duct with the hydraulic diameter of 4 cm. Digital image analysis method was developed to obtain the size of the droplets ranging from 20 to 110μm. The digital images were segmented using the optimal threshold gray level for droplets sizing. Droplet size variation subjected to a single-side heated wall with constant he
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