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Journal articles on the topic 'Grey duck'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

Briggs, SV, MT Maher, and CC Davey. "Hunter Activity and Waterfowls Havests in New South Wales, 1977-82." Wildlife Research 12, no. 3 (1985): 515. http://dx.doi.org/10.1071/wr9850515.

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The results of six annual surveys of waterfowl hunters in New South Wales by mail card are reported. The aims of the survey were to ascertain reported distribution of hunting effort, size and composition of hunters' bags, and state of hunter origin. Hunting effort and waterfowl harvests were highest in southern inland New South Wales. Seasonal bag sizes varied between 15.8 and 27.2 ducks per hunter. Pacific black duck, grey teal and maned duck made up 88.6% of hunters' bags. About half the hunters in New South Wales originated from Victoria. Bag size and species composition, effect of reducing

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12

Braithwaite, LW, M. Maher, SV Briggs, and BS Parker. "An Aerial Survey of 3 Game Species of Waterfowl (Family Anatidae) Populations in Eastern Australia." Wildlife Research 13, no. 2 (1986): 213. http://dx.doi.org/10.1071/wr9860213.

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Populations of waterfowl of three game species, the Pacific black duck Anus superciliosa, grey teal A. gibberifrons, and maned duck Chenonetta jubata, were assessed by aerial survey in October 1983 within a survey region of 2 697 000 km2 of eastern Australia. The numbers of each species were assessed on all surface waters of over 1 ha, and on a sample of smaller surface waters within 10 survey bands each 30 km wide and spaced at intervals of 2� latitude from 20�30' to 38�30'S. The area within the survey bands was 324 120 km2, which gave a sampling intensity of 12.0% of the land surface area. T

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13

Briggs, SV, MT Maher, and RP Palmer. "Bias in Food Habits of Australian Waterfowl." Wildlife Research 12, no. 3 (1985): 507. http://dx.doi.org/10.1071/wr9850507.

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Most food studies of Australian waterfowl have relied on gizzard analyses. This introduces bias because of differential digestion rates. Oesophageal and gizzard contents collected from feeding grey teal (Anas gibberifrons) and pink-eared duck (Malacorhynchus membranaceus) at 2 sites in south-western New South Wales were determined. Pink-eared duck ate 99.6% animal food (mainly chironomid larvae and ostracods); grey teal ate 74.2% animal food (mainly corixids and dipteran larvae) at one site but 63.9% plant food (mainly grass seeds) at the other. Both species contained higher proportions of ani

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14

Kowalski, Andrzej, and Jan Pałyga. "Distribution of non-allelic histone H1 subtypes in five avian species." Annals of Animal Science 17, no. 2 (2017): 385–98. http://dx.doi.org/10.1515/aoas-2016-0063.

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Abstract The arrays of histone H1 subtypes from five avian species (chicken, grey partridge, pheasant, quail and duck) were compared to evaluate their intra- and inter-species variability. The electrophoretic patterns of linker histone preparations revealed the presence of subtypes that occur in all species (H1.a, H1.b, H1.c, H1.c′, H1.d and H5) and those which are confined to some species only (H1.a′, H1.b′, H1.z). In the densitometric profiles of histone H1 bands resolved in one-dimension acetic acid-urea polyacrylamide gel, the quantitative differences were observed both within a species (t

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15

Kingsford, R. T., P. S. Wong, L. W. Braithwaite, and M. T. Maher. "Waterbird abundance in eastern Australia, 1983 - 92." Wildlife Research 26, no. 3 (1999): 351. http://dx.doi.org/10.1071/wr96062.

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We examined the relationships between abundance of 16 species of waterbirds and the rainfall in eastern Australia, the rainfall west of this region, the annual Southern Oscillation index (SOI), the wetland area, and hunting in eastern Australia for the period 1983–92. Data were collected during aerial surveys of eastern Australia. For most explanatory variables, lags of up to five years before aerial surveys were also investigated during these analyses. The analyses covered all nine game species (plumed whistling-duck, Australian shelduck, Australian wood duck, pink-eared duck, grey teal, ches

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16

Crome, FHJ. "Australian Waterfowl Do Not Necessarily Breed on a Rising Water Level." Wildlife Research 13, no. 3 (1986): 461. http://dx.doi.org/10.1071/wr9860461.

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Nest sites of waterfowl (pacific black duck, grey teal, pink-eared duck, maned duck and Australian shelduck) in 200 tree holes were monitored monthly over 4 years in a swamp complex near Booligal, N.S.W. The most nests occurred in 1978 following a complete drawdown and reflooding of the swamps. A rising water level on an already full swamp did not result in significant nesting activity. The response to the drawdown and filling was not a simple matter of more aquatic vegetation and invertebrates being produced at this time. Samples of nekton were taken by net and quadrats, and plankton was take

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17

Breed, William, John Hatch, Colin Rogers, et al. "Bolivar Wastewater Treatment Plant provides an important habitat for South Australian ducks and waders." Australian Field Ornithology 37 (2020): 190–99. http://dx.doi.org/10.20938/afo37190199.

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The populations of South Australian duck and wader species have recently decreased considerably, but their abundance at Bolivar Wastewater Treatment Plant in metropolitan Adelaide is poorly known. To help assess the importance of this site for ducks and waders, we made 25 trips to Bolivar between December 2018 and July 2020, during most of which time south-eastern Australia was experiencing a long dry period. On each trip, we observed between 11 and 26 species of ducks and waders, with a mean total of 9804 (range 2437–15,653) individuals per trip. At times, we observed several thousand Pink-ea

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18

Gong, Y., Q. Yang, S. Li, et al. "Grey plumage colouration in the duck is genetically determined by the alleles on two different, interacting loci." Animal Genetics 41, no. 1 (2010): 105–8. http://dx.doi.org/10.1111/j.1365-2052.2009.01967.x.

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19

Božič, Luka. "Results of the January 2017 waterbird census in Slovenia." Acrocephalus 38, no. 174-175 (2017): 203–15. http://dx.doi.org/10.1515/acro-2017-0012.

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Summary In 2017, the International Waterbird Census (IWC) was carried out in Slovenia on January 14 and 15. Waterbirds were counted on all larger rivers, along the entire Slovenian Coastland and on most of the major standing waters in the country. During the census, in which 235 observers took part, 413 sections of the rivers and coastal sea with a total length of 1,427 km and 200 other localities (164 standing waters and 36 streams) were surveyed. The census was characterized by harsh winter conditions and high proportion of frozen water bodies. Altogether, 51,790 waterbirds of 61 species wer

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20

Lonergan, Mike, Callan D. Duck, Dave Thompson, Simon Moss, and Bernie McConnell. "British grey seal (Halichoerus grypus) abundance in 2008: an assessment based on aerial counts and satellite telemetry." ICES Journal of Marine Science 68, no. 10 (2011): 2201–9. http://dx.doi.org/10.1093/icesjms/fsr161.

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Abstract Lonergan, M., Duck, C. D., Thompson, D., Moss, S., and McConnell, B. 2011. British grey seal (Halichoerus grypus) abundance in 2008: an assessment based on aerial counts and satellite telemetry. – ICES Journal of Marine Science, 68: 2201–2209. Recent estimates of the total size of the British grey seal population have been based on fitting age-structured models to estimates of pup production. The estimates were sensitive to whether density-dependence was considered to act on fecundity or pup survival. This study provides an alternative estimate for abundance in 2008: 91 800 animals (9

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21

Gautier, J., J. K. Pal, M. F. Grossi de Sa, J. C. Beetschen, and K. Scherrer. "Differential cytolocalization of prosomes in axolotl during oogenesis and meiotic maturation." Journal of Cell Science 90, no. 4 (1988): 543–53. http://dx.doi.org/10.1242/jcs.90.4.543.

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The prosomes, a novel type of small RNA-protein complex previously characterized in avian and mammalian cells, were isolated from axolotl (Ambystoma mexicanum) oocytes and identified by sedimentation analysis and protein composition. The prosomal nature of these particles was further ascertained by immunoblot analysis with anti-duck prosome monoclonal antibodies. By in vitro [35S]methionine labelling, de novo synthesis of prosomal proteins could be detected neither during oogenesis nor meiotic maturation. The results obtained by both indirect immunofluorescence and immunoblot analyses demonstr

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22

Al-Kurdi, Mareb A., Sajida A. Al-Shaheen, and Majid H. Al-Asadi. "Use of RAPD Markers Technique to Evaluate Genetic Variation in Two Types of Local Ducks." Basrah Journal of Agricultural Sciences 32, no. 2 (2019): 1–6. http://dx.doi.org/10.37077/25200860.2019.176.

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This study was carried out to assess the genetic variation between two local Iraqi (white and grey) ducks by RAPD-PCR technique using five random primers. The total number of bands that shown by the primers (APO-08, APOF-O9, APO-10, APO-16, APO-18) was 63, 53, 79, 81, 68 for local white ducks, while it was 62, 61, 66, 69, 58 for the local gray ducks respectively. Additionally, all primers showed 59 common bands. OPA-08 primer showed the highest number of common bands (22) while APF-09 primer resulted the lowest number of common bands (4 bands). The overall number of specific bands in local whi

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23

Huin, N., and P. A. Prince. "Diving behaviour of the grey-headed albatross." Antarctic Science 9, no. 3 (1997): 243–49. http://dx.doi.org/10.1017/s0954102097000321.

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Foraging grey-headed albatrosses spent 86% of the night but only 20% of the day sitting on the sea; most diving activity occurred during daylight. During the broad-guard period of nesting, peaks of diving activity occurred at midday and dusk. During the subsequent chick-rearing period, however, diving was mainly at dawn and dusk. Of 485 dives measured, the depth averaged 0.74 m, with maximum depth at 6.5 m. On average grey-headed albatrosses dived 24 times during a five day foraging trip. Dive depths increased towards midday, probably as a function of the birds' visual acuity rather than due t

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24

Bordjan, Dejan. "Vodne ptice in ujede Cerkniškega polja (južna Slovenija) v letih 2007 in 2008, s pregledom zanimivejših opazovanj do konca leta 2010 / Waterbirds and raptors of Cerknica polje (southern Slovenia) in 2007 and 2008, with an overview of interesting observations till the end of 2010." Acrocephalus 33, no. 152-153 (2012): 25–104. http://dx.doi.org/10.2478/v10100-012-0002-z.

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Between the end of February 2007 and mid-February in 2008, 73 systematic surveys of waterbirds and raptors were carried out during 10-day periods at Cerknica polje (Southern Slovenia). The main objectives of our research were: to ascertain the abundance and temporal dynamics of the species occurring here, to specify their status, to make a comparison with the past period of systematic data gathering in the 1991-1992 period, to present estimates of the breeding, migrating and wintering populations, as well as to make, on these bases, a nature-conservancy evaluation of the area. Other ornitholog

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25

McDougall, Matthew B., and Courtney L. Amundson. "Harvest dynamics and annual survival of mallards and grey ducks." Journal of Wildlife Management 81, no. 3 (2017): 449–60. http://dx.doi.org/10.1002/jwmg.21213.

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26

Clarke, JL, ME Jones, and PJ Jarman. "Diurnal and Nocturnal Grouping and Foraging Behaviors of Free-Ranging Eastern Grey Kangaroos." Australian Journal of Zoology 43, no. 5 (1995): 519. http://dx.doi.org/10.1071/zo9950519.

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Group size, methods of surveillance and foraging rates of free-ranging eastern grey kangaroos, Macropus giganteus, were compared between night and day, from data on 24-h followings of 24 individuals. Kangaroos occurred in smaller groups in the dark but the reduction in group size took place before or around dusk, and could not be attributed to animals drifting apart after dark. Instead, changes in group size coincided with much movement by animals around dusk. Both males and females tended to spend less time surveying after dark, but females surveyed in fewer bouts at night than in the day. Fe

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27

Hill, GJE, A. Barnes, and GR Wilson. "The Use of Wheat Crops by Grey Kangaroos, Macropus-Giganteus, in Southern Queensland." Wildlife Research 15, no. 2 (1988): 111. http://dx.doi.org/10.1071/wr9880111.

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Aerial surveys of eastern grey kangaroos, Macropus giganteus, were conducted over the western edge of the wheat belt of southern Queensland in two wet years (1983 and 1984) and one year of average rainfall (1985). Because most kangaroos moved rapidly off crops shortly after dawn and returned shortly before dusk, flights within 15 min of dawn and dusk provided the best indicators of kangaroo crop usage. Very low densities were observed on mature crops in all years and on immature crops in the two wetter years. In July 1985, which was drier, a density of 11 kangaroos km-2 was recorded on immatur

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28

Halse, Stuart A., Ian R. James, Patrick E. Fitzgerald, A. Diepeveen, and Donald R. Munro. "Survival and Hunting Mortality of Pacific Black Ducks and Grey Teal." Journal of Wildlife Management 57, no. 1 (1993): 42. http://dx.doi.org/10.2307/3808998.

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29

Barker, Richard J., James E. Hines, and James D. Nichols. "Effect of Hunting on Annual Survival of Grey Ducks in New Zealand." Journal of Wildlife Management 55, no. 2 (1991): 260. http://dx.doi.org/10.2307/3809148.

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30

Hitchmough, R. A., M. Williams, and C. H. Daugherty. "A genetic analysis of mallards, grey ducks, and their hybrids in New Zealand." New Zealand Journal of Zoology 17, no. 3 (1990): 467–72. http://dx.doi.org/10.1080/03014223.1990.10422944.

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31

Caithness, Tom, Murray Williams, and James D. Nichols. "Survival and Band Recovery Rates of Sympatric Grey Ducks and Mallards in New Zealand." Journal of Wildlife Management 55, no. 1 (1991): 111. http://dx.doi.org/10.2307/3809247.

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32

Al-Ajeeli, Karim S. "Isolation of Pigeonpox Virus from Severe Infection of Pigeons in Diyala province: Virological and Histopathological Study." Iraqi Journal of Veterinary Medicine 39, no. 2 (2015): 72–78. http://dx.doi.org/10.30539/iraqijvm.v39i2.181.

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Pigeonpox virus was isolated from severe cases of avipoxvirus infection affecting 64 pigeons in Ba'aquba of Diyala governarate. The virus grew well on chorioallantoic membrane of chick embryos of 11-12 days old, and produced typical pock lesions. Histopathological sections of infected tissue samples revealed typical pox lesions. The virus was identified as Pigeonpox virus using of specific hyper immune serum and indirect immuno-flourescent and indirect immuno-peroxidase tests. The virus agglutinated RBCs of pigeon, fowl, turkey and duck. Experimental infection in pigeons produced moderate infe

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33

Takeda, F., W. J. Janisiewicz, J. Roitman, N. Mahoney, and F. B. Abeles. "Pyrrolnitrin Delays Postharvest Fruit Rot in Strawberries." HortScience 25, no. 3 (1990): 320–22. http://dx.doi.org/10.21273/hortsci.25.3.320.

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Postharvest treatment with pyrrolnitrin (250 mg·liter-1) and low storage temperatures delay postharvest rot development in fall-harvested `Tribute' strawberries (Fragaria × ananassa Duch.). Untreated fruit stored at 18C developed gray mold fruit rot (Botrytis cinerea) and rhizopus rot (leak) by the second day. Fruit that did not develop gray mold or leak eventually developed blue mold rot (Penicillium spp.). No rot was observed at 1C, but gray mold and rhizopus rots developed after berries were transferred to 18C. Pyrrolnitrin delayed the appearance of the various rots by 2 to 4 days, but did

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34

Kato, Shin, Kenji Chinen, Susumu Shinoura, and Fumihito Kunishima. "Pancreatic Duct Stricture That Rapidly Progressed to Pancreatic Ductal Adenocarcinoma and Formed a Mass within 3 Months: A Case Report." Case Reports in Gastroenterology 12, no. 2 (2018): 247–53. http://dx.doi.org/10.1159/000488977.

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The natural growth rate of pancreatic carcinoma in situ with pancreatic duct stricture remains unclear. Herein, we present a case with pancreatic duct stricture that rapidly grew to form a mass lesion within 3 months. A 74-year-old woman was referred to us for the investigation of a pancreatic duct dilatation. Initial images did not reveal any clear mass lesions near the pancreatic duct stricture. Pancreatic juice cytology showed suspicious findings. Distal pancreatectomy was recommended; however, the patient refused to undergo surgical treatment at that time. Images taken 3 months later demon

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Stronen, Astrid V., Graham J. Forbes, Tim Sallows, Gloria Goulet, Marco Musiani, and Paul C. Paquet. "Wolf body mass, skull morphology, and mitochondrial DNA haplotypes in the Riding Mountain National Park region of Manitoba, Canada." Canadian Journal of Zoology 88, no. 5 (2010): 496–507. http://dx.doi.org/10.1139/z10-021.

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Two types of wolves, gray ( Canis lupus L., 1758) and eastern ( Canis lupus lycaon Schreber, 1775 or Canis lycaon ) or Great Lakes wolves, representing Old World (OW) and New World (NW) mitochondrial DNA (mtDNA) haplotypes, have been reported in eastern Canada and the Great Lakes region. Both haplotypes were found in Duck Mountain Provincial Park and Forest, Manitoba. Only OW haplotypes have been reported from the isolated Riding Mountain National Park (RMNP), 30 km to the south. Wolves with NW haplotypes hybridize with C. lupus and coyotes ( Canis latrans Say, 1823) and could mediate gene flo

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36

Forsyth, David M., Michael P. Scroggie, and Eve McDonald-Madden. "Accuracy and precision of grey-headed flying-fox (Pteropus poliocephalus) flyout counts." Wildlife Research 33, no. 1 (2006): 57. http://dx.doi.org/10.1071/wr05029.

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The principal method for estimating the abundance of bats in roosts is to count the number of bats exiting the roost at dusk (‘flyout counts’). We hypothesised that the accuracy and precision of flyout counts decrease non-linearly as the number of bats moving per unit of time increases, and that accuracy increases with observer experience. To test these hypotheses, we filmed grey-headed flying-foxes (Pteropus poliocephalus) exiting a roost in Melbourne on three consecutive evenings. The film was slowed and the number of flying-foxes flying-out in 30-s intervals was counted and assumed to be th

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Talukdar, Prabal. "Mixed Convection and Non-Gray Radiation in a Horizontal Rectangular Duct." Numerical Heat Transfer, Part A: Applications 59, no. 3 (2011): 185–208. http://dx.doi.org/10.1080/10407782.2011.540966.

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38

Rhymer, Judith M., and Michael J. Braun. "Mitochondrial Analysis of Gene Flow between New Zealand Mallards (Anas platyrhynchos) and Grey Ducks (A. superciliosa)." Auk 111, no. 4 (1994): 970–78. http://dx.doi.org/10.2307/4088829.

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39

McCreight, James D., and Albert N. Kishaba. "Reaction of Cucurbit Species to Squash Leaf Curl Virus and Sweetpotato Whitefly." Journal of the American Society for Horticultural Science 116, no. 1 (1991): 137–41. http://dx.doi.org/10.21273/jashs.116.1.137.

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Squash leaf curl (SLC) is a virus disease of squash transmitted by the sweetpotato whitefly [Bernisia tabaci (Germ.)]. 'Cucurbita maxima Duch. ex Lam., C. mixta Pang, and C. pepo L. cultivars and the wild taxon. C. texana Gray exhibited severe symptoms in response to SLC in greenhouse and field tests. Symptoms on C. moschata (Duch.) Duch. ex Poir. cultivars were much more severe in greenhouse tests than in field tests. Three wild species, C. ecuadorensis Cutler and Whitaker, C. lundelliana Bailey, and C. martinezii Bailey, were virtually immune in greenhouse tests, but were infected in field t

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Roshier, David A., and Martin W. Asmus. "Use of satellite telemetry on small-bodied waterfowl in Australia." Marine and Freshwater Research 60, no. 4 (2009): 299. http://dx.doi.org/10.1071/mf08152.

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The nomadic or dispersive movements of many Australian waterfowl in response to irregular environmental cues make satellite telemetry studies the only means by which these long-distance movements can be tracked in real time. Unlike some large-bodied soaring species, attaching satellite transmitters to small-bodied waterfowl (<1 kg) is not straightforward because ducks have high wing loadings and need to maintain active flapping to stay aloft. In the present paper, we detail one harness design and attachment method that enabled us to track grey teal (Anas gracilis) for up to 879 days. In add

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García, José M., Cayetano Aguilera, and Antonia M. Jiménez. "Gray Mold in and Quality of Strawberry Fruit following Postharvest Heat Treatment." HortScience 31, no. 2 (1996): 255–57. http://dx.doi.org/10.21273/hortsci.31.2.255.

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Strawberries (Fragaria × ananassa Duch. `Tudla') were inoculated with gray mold conidia (Botrytis cinerea Pers.) and were subjected to postharvest heat treatment by dipping in water at various temperatures for 15 min. Heat treatment delayed Botrytis proliferation, but using dips at ≥48C caused fruit to soften and develop an atypical pink pigmentation. Fruit treated at 44 or 46C showed the best retention of firmness and maintained initial quality, developing neither an off-color nor an off-flavor.

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Swatland, H. J. "Patterns of succinate dehydrogenase activity in a leg muscle of the domestic duck during postnatal development." Canadian Journal of Zoology 63, no. 1 (1985): 55–57. http://dx.doi.org/10.1139/z85-010.

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Transverse sections of iliotibialis cranialis from male Muscovy ducks were reacted for histochemical demonstration of myofibrillar adenosine triphosphatase (ATPase) and for succinate dehydrogenase (SDH) activities. The distribution of SDH activity within muscle fibers was measured with a microscope photometer and a computer-controlled scanning stage. From 1 to 10 weeks after hatching, the average SDH activity across muscle fiber areas decreased. All fiber types exhibited a decline of SDH activity in their central axis. However, fibers with strong ATPase and weak SDH concurrently developed stro

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Riese, R. J., J. G. Kleinman, J. H. Wiessner, G. S. Mandel, and N. S. Mandel. "Uric acid crystal binding to renal inner medullary collecting duct cells in primary culture." Journal of the American Society of Nephrology 1, no. 2 (1990): 187–92. http://dx.doi.org/10.1681/asn.v12187.

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Attachment of microcrystals to cellular membranes may be an important component in the pathophysiology of urolithiasis. This study characterizes the concentration-dependent binding of uric acid crystals to rat renal inner medullary collecting duct cells in primary culture. Collecting duct cell cultures grew as monolayers with interspersed aggregates of rounded cells. Cultures were incubated with 14C-uric acid crystals, and the crystals that bound were quantitated by adherent radioactivity. Uric acid crystal adherence demonstrated concentration dependent saturation with a 1/alpha value (maximum

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Laugale, Valda, Līga Jankevica, Ineta Samsone, et al. "Preliminary Studies on Development of a New Environmentally Friendly Plant Protection Product Against Grey Mould." Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences 67, no. 2 (2013): 199–202. http://dx.doi.org/10.2478/prolas-2013-0033.

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The development of new environmentally friendly plant protection products against grey mould disease (caused by Botrytis cinerea Pers.) was started in 2010. In the Latvian State Forest Research Institute “Silava”, production of coniferous biomass extracts using different solvents for extraction was performed. During 2010-2011, several laboratory investigations were carried out in the Institute of Biology, University of Latvia. Effectiveness of pine (Pinus sylvestris) and spruce (Picea abies) biomass extracts against Botrytis cinerea was tested. On the basis of coniferous extracts, 11 formulati

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Dolar, Mladen. "The owl of Minerva from dusk till dawn, or, two shades of gray." Filozofija i drustvo 26, no. 4 (2015): 875–90. http://dx.doi.org/10.2298/fid1504875d.

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The paper takes as its starting point the figure of the owl as the emblem of philosophy, it looks at its history and takes up its most significant philosophical use, the notorious passage where Hegel uses the owl as the indication of philosophy?s necessary belatedness. This is the passage which is usually taken as the point of indictment of Hegel?s position and the role he ascribed to philosophy. Hegel?s adage ?What is rational is actual, and what is actual is rational? is scrutinized in its various aspects, particularly in view of its other version, ?what is rational must happen?. The tension

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JEON, HYE RI, MI JIN KWON, and KI SUN YOON. "Control of Listeria innocua Biofilms on Food Contact Surfaces with Slightly Acidic Electrolyzed Water and the Risk of Biofilm Cells Transfer to Duck Meat." Journal of Food Protection 81, no. 4 (2018): 582–92. http://dx.doi.org/10.4315/0362-028x.jfp-17-373.

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ABSTRACT Biofilm formation on food contact surfaces is a potential hazard leading to cross-contamination during food processing. We investigated Listeria innocua biofilm formation on various food contact surfaces and compared the washing effect of slightly acidic electrolyzed water (SAEW) at 30, 50, 70, and 120 ppm with that of 200 ppm of sodium hypochlorite (NaClO) on biofilm cells. The risk of L. innocua biofilm transfer and growth on food at retail markets was also investigated. The viability of biofilms that formed on food contact surfaces and then transferred cells to duck meat was confir

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Winkler, Marjorie Green. "A 12,000-Year History of Vegetation and Climate for Cape Cod, Massachusetts." Quaternary Research 23, no. 3 (1985): 301–12. http://dx.doi.org/10.1016/0033-5894(85)90037-7.

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Pollen and charcoal analysis of radiocarbon-dated sediment cores from Duck Pond in the Cape Cod National Seashore provide a continuous 12,000-yr vegetation and climate history of outer Cape Cod. A Picea-Hudsonia parkland and then a Picea-Pinus banksiana-Alnus crispa boreal forest association grew near the site between 12,000 and 10,000 yr B.P. This vegetation was replaced by a northern conifer forest of Pinus strobus-P. banksiana, and, subsequently, by a more mesophytic forest (Pinus strobus, Tsuga, Quercus, Fagus, Acer, Ulmus, Fraxinus, Ostrya) as the climate became warmer and wetter by 9500

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Moxley, JH, G. Skomal, J. Chisholm, P. Halpin, and DW Johnston. "Daily and seasonal movements of Cape Cod gray seals vary with predation risk." Marine Ecology Progress Series 644 (June 25, 2020): 215–28. http://dx.doi.org/10.3354/meps13346.

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White sharks Carcharodon carcharias and gray seals Halichoerus grypus are re-establishing their ecological roles within the Northwestern Atlantic Ocean, presenting an opportunity to understand gray seal movement and at-sea behavior under predation risk. As with other shark-seal hotspots, movements to and from terrestrial haul outs can be risky for gray seals, thereby eliciting antipredator strategies. We investigated the movement and coastal behavior of gray seals on Cape Cod (USA) in relation to seasonal and diel changes in white shark activity. Analyzing 412 trips to sea by 8 seals and more

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Omidpanah, Mohammad, and Nassab Gandjalikhan. "Inverse boundary design problem of combined radiation convection heat transfer in a duct with diffuse-spectral design surface." Thermal Science 23, no. 1 (2019): 319–30. http://dx.doi.org/10.2298/tsci161011114o.

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In the present work, an optimization technique is applied for inverse boundary design problem of radiative convective heat transfer of laminar duct flow by numerical method. The main goal is to verify how the solution of inverse problem is affected by the spectral behavior of the boundary surfaces. The conjugate gradient method is used to find the unknown temperature distribution over the heater surface to satisfy the prescribed temperature and heat flux distributions over the design surface. The bottom boundary surface (including design surface) is diffuse-spectral, while the top wall (heater

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Benoy, Glenn A. "Variation in tiger salamander density within prairie potholes affects aquatic bird foraging behaviour." Canadian Journal of Zoology 83, no. 7 (2005): 926–34. http://dx.doi.org/10.1139/z05-081.

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Through competitive asymmetry, coexisting fish populations can alter aquatic bird distributions and reduce the reproductive success of their offspring. Gray tiger salamanders (Ambystoma mavortium diaboli Dunn, 1940) may function similarly in fishless prairie potholes. To test the hypothesis that tiger salamanders compete with aquatic birds (including ducks, grebes, and American Coot (Fulica americana J.F. Gmelin, 1789)) for prey resources during the breeding season, 16 potholes were divided into halves by an impermeable plastic barrier and tiger salamander densities were increased or decreased

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