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Literatura científica selecionada sobre o tema "Ducks"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 29 de julho de 2024

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Artigos de revistas sobre o assunto "Ducks"

1

Natonek-Wiśniewska, Małgorzata, Piotr Krzyścin e Dominika Rubiś. "Mitochondrial Markers for the Detection of Duck Breeds Using Polymerase Chain Reaction". Genes 12, n.º 6 (3 de junho de 2021): 857. http://dx.doi.org/10.3390/genes12060857.

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Species identification of the components of various duck breeds has revealed that the lowest identifiable number of components depends on the breed. The results (shown on the agarose gel) of a species-specific PCR reaction for Rouen ducks were less intense than the results for the same amount of components from other popular duck breeds, suggesting differences in the Rouen duck genome. Therefore, the present study aimed to identify part of the Rouen duck’s gene sequences and to develop two new primer pairs. The first pair enables breed-independent identification of duck DNA, and the second distinguishes Rouen ducks from Chinese and Indian Runner ducks. The sequencing reaction yielded sequences of 1386 bp in length, and the identified sequence differs by around 7% from the sequences of Chinese duck species. The detected sequence contributes to improving species identification methods for duck DNA. On its basis, two primers for the identification of duck DNA were designed. The first allows for DNA amplification with the same sensitivity regardless of duck breed. The second primer’s pair is breed specific, and it distinguishes Rouen ducks from Chinese and Indian Runner ducks. Both methods are very sensitive (0.05%).

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2

Ismoyowati, Ismoyowati, Diana Indrasanti, Sigit Mugiyono e Mulyoto Pangestu. "Phytogenic compounds do not interfere physiological parameters and growth performances on two Indonesian local breeds of ducks". November-2019 12, n.º 11 (novembro de 2019): 1689–97. http://dx.doi.org/10.14202/vetworld.2019.1689-1697.

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Aim: The present study was to investigate the interaction between duck's breed and phytogenic compounds as feed additives in the diet on blood lipid and hematological profile, welfare, and growth performance. Materials and Methods: A total of 200 male day-old local breed ducks (Tegal and Muscovy ducks) were used in this experiment. The first factor was duck breed and the second factor was different phytogenic compounds supplementation in the diet: Garlic, turmeric, ginger, and kencur, at 3% each. The observed variables were the blood lipid profiles comprise high-density lipoprotein (HDL), low-density lipoprotein, cholesterol total, triglyceride, blood parameters, welfare (heterophil/ lymphocyte [H/L] ratio), and growth performances (feed consumption, body weight gain, feed conversion ratio, and carcass percentage). Results: The interaction between breed of ducks and phytogenic compounds had a significant effect on blood triglyceride, but no significant effect on the blood lipid profile, hematological parameters, and growth performances. While, phytogenic compounds in the diet had significant effects on the blood lipid profile, heterophil (H), lymphocyte (L), and H/L ratio of ducks. The breed factors affected HDL and growth performances. Muscovy duck had a higher HDL and growth performance compare to Tegal duck. Among those, garlic most effectively reduced triglyceride level in Tegal duck. Conclusion: Phytogenic compounds 3% do not have a negative effect on the physiological parameters of ducks increase ducks welfare (H/L ratio), so it does not affect the growth performances of ducks. Muscovy duck had higher growth performances than Tegal ducks.

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Hidayati, Nuke Nur, Enny Yusuf Wachidah Yuniwarti e Sri Isdadiyanto. "Perbandingan Kualitas Daging Itik Magelang, Itik Pengging Dan Itik Tegal". Bioma : Berkala Ilmiah Biologi 18, n.º 2 (10 de agosto de 2016): 56. http://dx.doi.org/10.14710/bioma.18.2.56-63.

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Local ducks in Indonesia there was several kinds, for example Tegal ducks, Magelang ducks and Pengging duck each having morphology different of duck. Research on the quality meat of ducks that includes ash content, water content, carbohydrate content, fat content, protein content, and muscle cell diameter of femoral ducks important to know quality meat of each duck. This study aimed to analyzed the differences types of ducks on the chemical content of meat and femoral muscle histology of diameter cell at Tegal ducks, Magelang ducks and Pengging ducks. Ducks were used in this study maintained in the Central Breeding and Raising Ducks Work Unit Non Ruminant Livestock Banyubiru, Ambarawa. The duck six month old was analyzed chemical content of meat and measuring diameter of femoral muscle cells. Duck samples taken from three different types of ducks that Tegal duck,Pengging duck and Magelang duck, of each type of sample taken many ducks as 6 tails. Data were analyzed using analysis of variance (ANOVA). If the data were analyzed contained a real difference, continued by the Least Significant Differences Test (LSDT) at 95% confidence level. The results showed that no significant difference in all variables, from the result has been concluded that differences type of ducks not affect the chemical contents of duck meat and diameter of femoral muscle cells. Keywords: Local Ducks in Central Java, Quality of Meat, Muscle Cell Diameter Femoral Ducks.

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4

Sukarne, Sukarne, e Muhammad Nursan. "Effectiveness Test of Duck Mie (Innovation of Noodle-shaped Feed) on Peking Duck Productivity". Jurnal Biologi Tropis 22, n.º 2 (22 de março de 2022): 398–406. http://dx.doi.org/10.29303/jbt.v22i2.3429.

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Low feed efficiency is often an obstacle in duck farming business. The morphology of the duck's beak which is only suitable for muddy habitats causes ducks to be often inefficient in consuming feed in the form of mash, crumble or pellet. Thus, duck mie (a noodle-shaped and earthworm-like duck feed) has been innovated which is the natural food for ducks in their natural habitat (rice fields and swamp areas). The main ingredients for making duck mie are cheap and potential local ingredients, such as; golden snail, rice bran, corn flour and cassava flour. The purpose of this study was to determine the extent to which the provision of duck mie in the ration affects the productivity of Peking ducks. The method used in this study was a completely randomized design (CRD) using 4 treatments with 4 replications, the research material in the form of 80 DOD Peking ducks with treatment aged 1-7 days given 100% formulated feed. Age 8-14 days adapted to 95% formulated feed + 5% Duck Mie. Age 15 – 56 days given feed formulated according to treatment T0 = 100% formulated feed, T1 = 90% formulated feed + 10% Duck Mie, T2 = 80% formulated feed + 20% Duck Mie, and T3 = 70% formulated feed + 30 % Duck Mie. The data obtained then analyzed using analysis of variance (ANOVA), then tested using Duncan's Distance Test. The research parameters were feed intake, average daily gain (ADG), feed conversion ratio (FCR) and feed efficiency. Based on the study, it was found that the provision of duck mie in the ration did not show a significant effect (P<0.05) based on consumption, ADG, efficiency and feed conversion ratio of ducks.

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5

Wulandari, Desi, Sunarno Sunarno e Tyas Rini Saraswati. "Perbedaan Somatometri Itik Tegal, Itik Magelang Dan Itik Pengging". Bioma : Berkala Ilmiah Biologi 17, n.º 2 (21 de dezembro de 2015): 94. http://dx.doi.org/10.14710/bioma.17.2.94-101.

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Local ducks in Indonesia there are several kinds, for example Tegal ducks, Magelang ducks and Pengging duck each having characteristics different somatometri. Research on somatometri ducks that includes body weight, leg length, beak length, wing length, body length, and long-neck ducks important to know somatometri of each duck. This study aimed to analyze the differences somatometri at Tegal ducks, Magelang ducks and Pengging duck, which includes weight, leg length, beak length, wing length, body length, and a long neck. Ducks were used in this study maintained in the Central Breeding and Raising Ducks Work Unit Non Ruminant Livestock Banyubiru, Ambarawa. The study was conducted by measuring somatometri of each six monthold ducks. Duck samples taken from three different types of ducks that Tegal duck, Pengging duck and Magelang duck, of each type of sample taken many ducks as 6 tails. Data were analyzed using analysis of variance (ANOVA) with the differentiating factor is the type of duck. If the data were analyzed contained a real difference, then do a further test using the test Least Significant Differences (LSD) at 95% confidence level. The results showed that there was no significant difference in all parameters of the study. Conclusion of the study three types of ducks will have somatometri not unlike that includes, weight, leg length, beak length, wing length, body length and the length of the neck. It was because give feed and feed same time. Keywords: Local Ducks in Central Java, Somatometri, Tegal ducks, Magelang ducks, Pengging duck

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6

Wibowo, Sarwo Edi, Muhammad Anwar Djaelani e Hermin Pancasakti Kusumaningrum. "Pelacakan Gen Sitokrom Oksidase Sub Unit I (COI) DNA Mitokondria Itik Tegal (Anas domesticus) Menggunakan Primer Universal". Bioma : Berkala Ilmiah Biologi 15, n.º 1 (11 de junho de 2013): 20. http://dx.doi.org/10.14710/bioma.15.1.20-26.

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Currently local ducks are generally quite difficult to find in a big farm in Inonesia, including Tegal ducks. Tegal ducks is one of the genetic resources native to Indonesia with it’s advantages in terms of high and large egg production. Conservation and development of local ducks have strived to maintain our existence of Indonesian livestock germplasm. If such information is not superior to native species exist, the opportunity to increase his lead further also getting smaller. Tracking the mitochondrial COI gene DNA of Tegal ducks may underlie the process of an organism's genetic characterization. Information about Tegal duck mitochondrial DNA has not been done. The information obtained can be used for optimization of duck products native to Indonesia both in physiological aspects, phylogeny and genetic engineering. The research method used in this research is tracking COI gene data from Gen Bank with the programs Clustal X and Genedoc. Tracking then continued using universal primers HCO and LCO. The results of the data followed up with the isolation and amplification of COI gene mitochondrial DNA as well as the optimization of PCR conditions. The results showed mitochondrial DNA COI gene Tegal ducks were amplified with primer LCO obtain DNA fragments of length less than 250 bp. Kata kunci: duck’s from Tegal, COI gene, mitochondrial DNA

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7

Muthmainnah, Atika, e Khalid Jalali. "Produktivitas Budidaya Antara Bebek Peking (Anas platyrhynchos) dengan Bebek Hibrida (Anas platyrhynchos domesticus)". Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan 2, n.º 4 (28 de outubro de 2022): 255–68. http://dx.doi.org/10.36312/pjipst.v2i4.127.

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Broiler ducks are ducks that are able to grow quickly and can convert feed efficiently into meat with high value. Duck meat has a good structure and structure of the meat. The good structure of duck meat is now popular with the public, because the taste of the meat is delicious and savory. Broiler ducks that are known by the public include hybrid ducks and peking ducks. The demand for duck meat that continues to increase does not change with the availability of duck meat available in the market, to meet the needs of the community. It is possible to breed broiler ducks as proof that the poultry business for ducks is wide open with the promised profit prospects. The purpose of this study was to determine the productivity in broiler duck cultivation which can increase body weight gain quickly, economically and produce meat that has high nutrition to meet public demand. The research method used is literature review by analyzing relevant articles and focusing on the productivity of broiler duck farming. Based on maintenance for 6 weeks, the data obtained was the consumption of hybrid rations as much as 6,514 g/head while in peking ducks as much as 7,601 g/head, PBB in hybrid ducks was 1,237 g/head, while for peking ducks 1,699 g/head, FCR in ducks hybrid 5.29 and peking duck 4.49 and mortality of hybrid duck 4% and peking duck 12%. The weight gain, mortality, and feed conversion of peking ducks were higher than that of hybrid ducks. The conclusion from the results of the study that the best duck genotype to produce FCR was hybrid duck and production performance which included body weight gain, feed consumption and feed conversion in peking ducks and hybrid ducks.

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Arlina, Firda, e Sabrina Sabrina. "Performance of various types of West Sumatera female ducks at starter period". E3S Web of Conferences 373 (2023): 01007. http://dx.doi.org/10.1051/e3sconf/202337301007.

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West Sumatra has several breeds of germplasm ducks that have good potential for breeding, including Bayang Ducks, Kamang ducks, Pitalah ducks, and Sikumbang Janti ducks. This type of duck develops in the origin area to produce eggs and meat. The diversity of the performance of these ducks is still high. This study aims to determine the performance of various West Sumatra female ducks during the starter period. One hundred twenty heads of local female ducks were used in this study. This study used an experimental method of Completely Randomized Design (CRD) with four treatments and five replicates; each cage unit consisted of 6 ducks. The treatments in this study consisted of four breeds of local female ducks from West Sumatra, namely A (Bayang duck), B (Kamang duck), C (Pitalah duck), and D (Sikumbang Janti ducks). This study showed that four breeds of local female ducks in West Sumatra had no significant effect (P>0.05) on feed consumption and body weight gain. In comparison, four breeds of local female ducks in West Sumatra significantly affected feed conversion (P<0.05). The feed conversion for Bayang, Sikumbang janti, Kamang, and Pitalah ducks was 4.60, 4.89, 4.60, 4.38, and 4.29. Based on the feed conversion, female Pitalah ducks were more efficient than others.

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9

Ridwan, M., R. Sari, R. D. Andika, A. A. Candra e G. G. Maradon. "Usaha Budidaya Itik Pedaging Jenis Hibrida dan Peking". PETERPAN (Jurnal Peternakan Terapan) 1 (22 de julho de 2020): 8–10. http://dx.doi.org/10.25181/peterpan.v1i1.1473.

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Broiler ducks are ducks that are able to grow fast and can efficiently convert feed into meat with high nutritional value. Broiler ducks have good flesh structure and structure. The good meat structure of broilers is now becoming more popular among the people, because the taste of the meat is tasty and tasty. Broiler ducks known by the public include hybrid ducks and Peking ducks. The ever-increasing need for duck meat is not matched by the availability of enough duck meat in the market, to meet the needs of the community. This could be the potential to cultivate broilers as evidence that poultry business and agribusiness, especially ducks are still wide open with promising profit prospects. The method used is: to maintain broilers totaling 50, each of which consists of 25 hybrid ducks and peking 25 tails, then feeding and drinking, taking data through recording weighing weight, and analyzing the profitability of broiler duck farming. Based on maintenance for 42 days, the data obtained was the consumption of 3.645 g / tail hybrid rations and the consumption of 3.727g pork duck / tail, United Nations hybrid duck 1.168,8 g and peking duck 1.171,04 g, FCR hybrid duck 3.11 and Peking duck 3.18 and hybrid duck mortality 4% and Peking 12%. Weight gain, mortality, and conversion of Peking duck feed were higher than hybrid ducks.Â Keywords: hybrid duck, Peking duck, Production PerformÂ

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10

Kadurumba, O. E., F. C. Egenuka, L. C. Ikpamezie, C. Kadurumba e D. N. Onunkwo. "Evaluation of local duck production systems in Imo and Abia States of Nigeria". Nigerian Journal of Animal Production 46, n.º 3 (6 de novembro de 2019): 120–30. http://dx.doi.org/10.51791/njap.v46i3.868.

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A study was conducted to evaluate local duck production systems in Imo and Abia States of Nigeria. Seventy-two (72) local duck farmers from both States were purposefully selected using snowball sampling techniques and were interviewed using structured questionnaires.Data on farmers' socio-economic characteristics and production practices were collectedand analyzed using descriptive statistics such as frequencies, percentages and charts. Theresults showed that there were more male duck farmers (88.89%), while the average age of duck farmers was 51.35years. Most (97.22%) of the duck farmers were literate, 58.33% ofhouseholds had between 4 - 7 members, 73.61% of duck farmers were Christians and a higher number (46.43%) raised pigs alongside of ducks. Most farmers (98.61%) kept only Muscovy ducks. The average flock size is about 6-9 ducks per household. Ducks were mainly kept for rituals and traditional medicine (56.78%). About 48.61% of farmers used personal money to finance duck farming, while 47.22% of farmers inherited their foundations stock. The age at sexual maturity for ducks was 7 to 9 months; clutch length was 11 to 15 days, while clutch size ranged from 16 to 20 eggs. Again, 94.44% of farmers practiced extensive system of duck keeping while 84.72% did not provide supplementary feeds to their ducks. Accidents are the leading cause of mortality in ducks, while the myths that surround ducks are the main obstacle to duck meat consumption. The results showed that duck farming is not popular in the study area and therefore, ducks are seen and kept as sacrificial birds. Thus, the potential of ducks for the production of meat and eggs is not fully exploited. These myths that have hindered the production of ducks could be dispelled through farmer trainings and enlightenment.

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Mais fontes

Teses / dissertações sobre o assunto "Ducks"

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 vegetation and fluctuations in temperature. Possible advantages of late breeding include reduced nest predation and higher ambient temperature during incubation. Longer dive durations and more frequent feeding and resting by Ruddy ducklings may enable ducklings to maximize energy for growth. Reduced nest flooding late in the season, dependence on green vegetation for nesting and greater abundance of food for young in summer were not demonstrated by this study. Therefore, these factors apparently do not explain the timing of breeding in Ruddy Ducks in southwestern British Columbia. Despite insufficient time to renest and shorter time for ducklings to mature before ponds freeze, the average number of 2B age class young produced per pair of Ruddy Ducks was similar to that of American Coots. Forty percent of nesting Ruddy females did not hatch any young, whereas almost all nesting Coot females successfully hatched young; however, survival of Ruddy ducklings to 2B age class (four weeks old) was higher than that of American Coots, Barrow's Goldeneye and Bufflehead.
Science, Faculty of
Zoology, Department of
Graduate

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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 for increased body temperatures and increased hematological parameters in Pekin ducklings. The hematological parameters in blue winged teal infected with C. bushiensis were found to decrease. Infection with S. globulus did not induce any significant systemic changes in the blue winged teal. A preliminary study of the effects of concurrent infection on the duck hosts suggests that in general, concurrent infection enhances the detrimental aspects of single infection, decreasing weight gain, increasing body temperatures, and decreasing hematological parameters in both species.

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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, alors que laccumulation de sphinganine (Sa) dans les tissues est plus importante chez les dindes que chez les canards. Lobjectif de nos travaux était de comprendre les différences de toxicité entre les dindes et les canards los dune exposition aux FBs. Les trois hypothèses suivantes ont été explorées : i) La toxicocinétique de la fumonisine B2 chez les dindes et les canards. ii) La capacité des cellules aviaires à se protéger de limportante accumulation de sphingolipides libres en augmentant leur catabolisme (phosphorylation). iii) Des mécanismes de toxicité des FBs autre que leur altération via le métabolisme des sphingolipides (stress oxydatif et les réponses inflammatoires). Lanalyse des paramètres de toxicocinétique de la fumonisine B2 na pas mis en évidence de différence significative entre les dindes et les canards. Les mesures de la toxicité simultanée de plusieurs FBs chez les dindes et les canards ont confirmé la forte sensibilité des canards. Laccumulation de shingasine-1-phosphate (Sa1P) dans le foie a également été corrélée avec la quantité de Sa mais pas avec les paramètres hépatiques de toxicité. De plus cette étude a mis en évidence que la quantité de Sa dans le foie était fortement dépendante de la teneur en FBs. Cependant les FBs nont eu aucun effet sur les paramètres de stress oxydatif pour les deux espèces. De manière intéressante, les FBs ont eu une légère réponse inflammatoire chez les canards mais pas chez les dindes. Des investigations plus poussées sur les effets des FBs sur le métabolisme des céramides et sur les processus inflammatoires seraient nécessaires pour comprendre les différences de toxicité entre les dindes et les canards exposés aux FBs
Fumonisins (FBs) are the major mycotoxins produced by Fusarium verticillioides and Fusarium proliferatum, which are found worldwide in maize and maize products. FBs toxic dose and clinical signs of toxicity vary from one species to another. FBs toxicity is commonly linked to their ability on blocking sphingolipids metabolism in all animal species, including avian species. Previous studies have demonstrated that ducks exhibit higher sensitivity to FBs toxicity than turkeys, whereas, the accumulation of sphinganine (Sa) in tissues is more pronounced in turkeys than in ducks. The objectives of our works were to investigate the causes which lead to different toxicity between ducks and turkeys to FBs exposure. The following three hypotheses were investigated: i) Toxicokinetics of fumonisin B2 in ducks and turkeys. ii) Ability of bird cells to protect themselves against high accumulation of free sphingolipids by increasing their catabolism (phosphorylation). iii) Other toxicity mechanisms of FBs rather than their alteration of sphingolipids metabolism (oxidative stress damage and inflammatory responses). The analysis of toxicokinetic parameters of fumonisin B2 did not provide a significant difference between ducks and turkeys. The measurement of simultaneous toxicity of FBs in ducks and turkeys confirmed higher sensibility of ducks. Also the accumulation of Sphingasine-1-Phosphate (Sa1P) in the liver correlated with the amount of Sa but not parameters of hepatic toxicity. Moreover, this study revealed that the amount of Sa in the liver was strongly dependent on the amount of FBs. On the other hand, FBs had no effect on oxidative damages parameters in both species. Interestingly, FBs had mild inflammatory response effect in ducks but not in turkeys. Further investigation on the effects of FBs on ceramide metabolism and inflammatory processes would be necessary to understand the different toxicity between ducks and turkeys to FBs exposure

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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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Mais fontes

Livros sobre o assunto "Ducks"

1

Otto, Carolyn. Ducks, ducks, ducks. New York: HarperCollins, 1991.

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2

Molly, Coxe, ed. Ducks, ducks, ducks. New York: Trumpet Club, 1993.

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3

Zobel, Derek. Ducks. Minneapolis, MN: Bellwether Media, 2012.

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4

Morgan, Sally. Ducks. New York, NY: Crabtree Pub. Co., 2008.

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5

Mara, Wil. Ducks. New York: Marshall Cavendish Benchmark, 2008.

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6

Linda, Aspen-Baxter, ed. Ducks. New York, NY: AV2 by Weigl, 2012.

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7

Endres, Hollie J. Ducks. Minneapolis, MN: Bellwether Media, 2007.

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8

Stone, Lynn M. Ducks. Vero Beach, Fla: Rourke Corp., 1990.

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9

Dieker, Wendy Strobel. Ducks. Minneapolis, MN: Jump!, 2012.

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Gibbons, Gail. Ducks! New York: Holiday House, 2001.

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Mais fontes

Capítulos de livros sobre o assunto "Ducks"

1

Hauskeller, Michael. "Shitting Ducks". In Mythologies of Transhumanism, 55–74. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39741-2_4.

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Samston, M. S. "Hunting Ducks". In Phunny Stuph, 132–33. New York: Routledge, 2021. http://dx.doi.org/10.4324/9781003237174-97.

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Häkkinen, Henry, Silviu O. Petrovan, Nigel G. Taylor, William J. Sutherland e Nathalie Pettorelli. "2. Ducks and Phalaropes (Antidae and Scolopacidae)". In Seabirds in the North-East Atlantic, 48–75. Cambridge, UK: Open Book Publishers, 2023. http://dx.doi.org/10.11647/obp.0343.02.

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With key information linked to thematic maps, this section evaluates the climate change vulnerability of ten species of ducks and phalaropes (Anatidae and Scolopacidae) – Long-tailed Duck, Harlequin Duck, Velvet Scoter, Common Scoter, Red-breasted Merganser, Red Phalarope, Red-necked Phalarope, Steller’s Eider, Common Eider, and King Eider – in the North-East Atlantic. The assessments for every species cover three categories each: the exposure, or the magnitude in percentage and the characteristics of climate change; the sensitivity, or how much and by which climatic events the species are affected, depending on their biological features; the adaptive capacity, or the potential of species to respond to climate change. Assessments of local conservation actions that can be implemented to reduce climate change impacts are listed here in readily consultable tables. This section focuses on the effectiveness of interventions against increasing mammal predation that threatens ducks and phalaropes. Criteria of relevance, strength, and transparency measure the effectiveness of the actions.

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Finlayson, C. Max. "Ducks Unlimited (DU)". In The Wetland Book, 1–5. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-007-6172-8_143-1.

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Finlayson, C. Max. "Ducks Unlimited (DU)". In The Wetland Book, 659–63. Dordrecht: Springer Netherlands, 2018. http://dx.doi.org/10.1007/978-90-481-9659-3_143.

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Salter, S. H. "Progress on Edinburgh Ducks". In Hydrodynamics of Ocean Wave-Energy Utilization, 35–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82666-5_2.

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Asbjørnsen, Peter Christian, e Jørgen Moe. "The Twelve Wild Ducks". In Shakespeare and the Folktale, editado por Charlotte Artese, 292–99. Princeton: Princeton University Press, 2019. http://dx.doi.org/10.1515/9780691197920-047.

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Su, C. H. "Breeds of Domestic Ducks". In Duck Production and Management Strategies, 57–96. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6100-6_2.

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Robinson, Sarah. "On ducks and vocations". In Doing Academic Careers Differently, 49–51. London: Routledge, 2023. http://dx.doi.org/10.4324/9781003267553-9.

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"Ducks/Duck-like Waterbirds". In Birds of Puerto Rico and the Virgin Islands, 84–99. Princeton University Press, 2021. http://dx.doi.org/10.1515/9780691219257-013.

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Trabalhos de conferências sobre o assunto "Ducks"

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Kasjanenko, Oksana, e Sergej Kasjanenko. "PROGRAM OF BIOSAFETY IN GROWING DUCKS". In Scientific Development of New Eastern Europe. Publishing House “Baltija Publishing”, 2019. http://dx.doi.org/10.30525/978-9934-571-89-3_87.

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Quillien, Jenny, e Dave West. "Rubber ducks, nightmares, and unsaturated predicates". In the ACM international conference. New York, New York, USA: ACM Press, 2010. http://dx.doi.org/10.1145/1869459.1869534.

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Merza Suhail ALTAIE, Salam, Sura Safi KHAFAJI, Salah Mahdi GATEA, Thamer Kareem ALJANABI e Mohammed Abd AL-KAHADUM. "EFFICACY OF SPRAYING DIFFERENT SOLUTIONS AT DIFFERENT INCUBATION PERIODS ON HATCHABILITY AND EMBRYONIC MORTALITY RATES OF LOCAL DUCK EGGS". In VI.International Scientific Congress of Pure,Applied and Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/rimarcongress6-5.

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Ducks have lower hatchability rate than other poultry species, ranging about 65- 82%, and duck egg hatching is more difficult than chicken egg hatching. The present study aimed to evaluate the effect of spraying incubating duck’s eggs with the olive oil, ethanol alcohol and distilled water on embryonic mortality and hatchability rates. Eight hundred fertilized eggs were used with an average weight of (65-73) g divided into four groups, each group subdivided into four sub-groups were sprayed with distilled water at 37°C temperature, olive oil and ethanol alcohol 70%, and the control group without spraying. The first group G1 was sprayed on 1st day of incubation, the second group G2 was sprayed at 7th day of incubation, and the third group G3 was sprayed at 14th day of the incubation period, and the fourth group was sprayed at 21st day of the incubation. The results revealed that the hatching rate was significant raising (p ≤ 0.05) in eggs sprayed by water in each periods of incubation when compared with other spraying groups. Also, the embryonic mortality rate registered a significant decreasing (p ≤ 0.05) in eggs spraying by distilled water during incubation periods compared with other spray group. In conclusions, from present results are established that the spraying Iraqi duck's eggs by distilled water could improve hatchability rate and decrease the mortality rate of embryo at variant periods of incubation.

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Merza Suhail ALTAIE, Salam, Sura Safi KHAFAJI, Salah Mahdi GATEA, Thamer Kareem ALJANABI e Mohammed Abd AL-KAHADUM. "EFFICACY OF SPRAYING DIFFERENT SOLUTIONS AT DIFFERENT INCUBATION PERIODS ON HATCHABILITY AND EMBRYONIC MORTALITY RATES OF LOCAL DUCK EGGS". In VI.International Scientific Congress of Pure,Applied and Technological Sciences. Rimar Academy, 2022. http://dx.doi.org/10.47832/minarcongress6-5.

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Ducks have lower hatchability rate than other poultry species, ranging about 65- 82%, and duck egg hatching is more difficult than chicken egg hatching. The present study aimed to evaluate the effect of spraying incubating duck’s eggs with the olive oil, ethanol alcohol and distilled water on embryonic mortality and hatchability rates. Eight hundred fertilized eggs were used with an average weight of (65-73) g divided into four groups, each group subdivided into four sub-groups were sprayed with distilled water at 37°C temperature, olive oil and ethanol alcohol 70%, and the control group without spraying. The first group G1 was sprayed on 1st day of incubation, the second group G2 was sprayed at 7th day of incubation, and the third group G3 was sprayed at 14th day of the incubation period, and the fourth group was sprayed at 21st day of the incubation. The results revealed that the hatching rate was significant raising (p ≤ 0.05) in eggs sprayed by water in each periods of incubation when compared with other spraying groups. Also, the embryonic mortality rate registered a significant decreasing (p ≤ 0.05) in eggs spraying by distilled water during incubation periods compared with other spray group. In conclusions, from present results are established that the spraying Iraqi duck's eggs by distilled water could improve hatchability rate and decrease the mortality rate of embryo at variant periods of incubation

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Atzeni, Mattia, Mikhail Plekhanov, Frederic Dreyer, Nora Kassner, Simone Merello, Louis Martin e Nicola Cancedda. "Polar Ducks and Where to Find Them: Enhancing Entity Linking with Duck Typing and Polar Box Embeddings". In Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing. Stroudsburg, PA, USA: Association for Computational Linguistics, 2023. http://dx.doi.org/10.18653/v1/2023.emnlp-main.566.

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Labussière, E., S. Dubois, M. D. Bernadet, M. Laborde e J. Litt. "Dynamics of thermal heat acclimatization in force-fed ducks". In 6th EAAP International Symposium on Energy and Protein Metabolism and Nutrition. The Netherlands: Wageningen Academic Publishers, 2019. http://dx.doi.org/10.3920/978-90-8686-891-9_111.

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Elly, F. H., Z. Poli, J. K. J. Kalangi e J. Husain. "Potential and strategy of agribusiness development of local ducks". In PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE OF ANIMAL SCIENCE AND TECHNOLOGY (ICAST 2021). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0144022.

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Bugiwati, S. R. A., M. I. A. Dagong e L. Rahim. "Comparison of physical meat characteristics of local and Pekin ducks". In PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE OF ANIMAL SCIENCE AND TECHNOLOGY (ICAST 2021). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0144259.

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Sari, Aprilianna Putri Zahara Nafsina Luvita, Akhmad Fathoni, Heru Sasongko, Dwi Nur Happy Hariyono, Dewi Sari Kumalawati e Dyah Maharani. "Genetic Diversity of the Prolactin Gene in Three Indonesian Ducks". In 2nd International Conference on Smart and Innovative Agriculture (ICoSIA 2021). Paris, France: Atlantis Press, 2022. http://dx.doi.org/10.2991/absr.k.220305.054.

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Elizabeth M Pritchett, Eric R Benson, Megan P Caputo, Amy L Johnson, Hongwei Xin, Michael Persia e Robert L Alphin. "Application of wireless electroencephalogram (EEG) to measure stress in ducks". In 2012 Dallas, Texas, July 29 - August 1, 2012. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2012. http://dx.doi.org/10.13031/2013.41747.

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Relatórios de organizações sobre o assunto "Ducks"

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Cummings, John. Geese, Ducks and Coots. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, agosto de 2016. http://dx.doi.org/10.32747/2016.7208739.ws.

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Canada geese, snow geese, ducks, and American coots all have been implicated in agricultural crop and turf damage. Generally, goose, duck, and American coot damage to crops, vegetation and aircraft can be difficult to identify. Usually the damage to crops or vegetation shows signs of being clipped, torn, or stripped. Tracks, feces, or feathers found neat the damage can be used to help identify the species. Damage to aircraft is obvious if the bird is recovered, but if not, and only bird parts are recovered, a scientific analysis is required. Canada geese, snow geese, ducks, and American coots are federally protected by the Migratory Bird Treaty Act (MBTA), which stipulates that, unless permitted by regulation, it is unlawful to “pursue, hunt, take, capture, kill, possess, sell, barter, purchase, ship, export, or import any migratory birds alive or dead, or any part, nests, eggs, or products thereof.” Generally, geese, ducks, and coots can be hazed without a federal permit in order to prevent damage to agriculture crops and property with a variety of scare techniques. In most cases, live ammunition cannot be used.

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Rine, Kristin, Roger Christopherson e Jason Ransom. Harlequin duck (Histrionicus histrionicus) occurrence and habitat selection in North Cascades National Park Service Complex, Washington. National Park Service, abril de 2022. http://dx.doi.org/10.36967/nrr-2293127.

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Harlequin ducks (Histrionicus histrionicus) are sea ducks that migrate inland each spring to nest along fast-flowing mountain streams. They are considered one of the most imperiled duck species in North America and occur in two distinct populations on the Atlantic and Pacific coasts. The Pacific coast population includes Washington State, where harlequin ducks breed in the Olympic, Cascade, and Selkirk Mountains. This species is designated as a Management Priority Species by the National Park Service within North Cascades National Park Service Complex (NOCA). This report summarizes harlequin duck surveys conducted during 15 years across a 27-year period (1990 and 2017) on major streams within NOCA, and incidental observations collected from 1968–2021. The primary objectives of these surveys were to 1) document the distribution and abundance of harlequin duck observations within NOCA boundaries, 2) describe productivity (number of broods and brood size), 3) describe breeding chronology of harlequin ducks, and 4) describe habitat characteristics of breeding streams. Sixty-eight stream surveys over 15 years resulted in observations of 623 individual harlequin ducks comprising various demographics, including single adults, pairs, and broods. In addition, we collected 184 incidental observations of harlequin ducks from visitors and staff between 1968–2021. Harlequin ducks were observed on 22 separate second- to sixth-order streams throughout NOCA across the entire 53-year span of data, both incidentally and during harlequin duck surveys by Park staff. Harlequin ducks were detected on 8 of the 13 streams that were actively surveyed. Excluding recounts, 88.7% (n = 330) of individual harlequin duck observations during surveys occurred in the Stehekin River drainage. Between all surveys and incidental observations, 135 unpaired females without broods were sighted across all NOCA waterways. Thirty-nine broods were recorded between NOCA surveys and incidental observations, with a mean brood size of 3.61 (± 1.44 SD; range = 2–10). Breeding pairs were recorded as early as April 5 and were seen on streams until June 15, a period of less than seven weeks (median: May 2), but most pairs were observed within a 3-week span, between April 26 and May 17. Single females (unpaired with a male, with (an)other female(s), or with a brood) were observed on streams between April 26 and August 25 (median: July 3), though most observations were made within a 5-week period between June 12 and July 19. Habitat data collected at adult harlequin duck observation sites indicate that the birds often used stream reaches with features that are characteristic of high-energy running water. While adults occupied all instream habitat types identified, non-braided rapids and riffles were used most frequently, followed by pools and backwaters. Larger instream substrate sizes (cobbles and boulders) were present at most observation sites. Adult harlequin ducks were more often found at locations that lacked visible drifting or lodged woody debris, but drift debris was a slightly more abundant debris type. The presence of gravel bars and at least one loafing site was common. Adult harlequin ducks were more often observed in association with vegetation that offered some cover over the channel, but not where banks were undercut. The average channel width at adult observation sites was 34.0 m (range: 6-80 m; n = 114) and 27.6 m (± 15.7 m; range: 10-60 m; n = 12) at brood observation sites. Compared to adult harlequin duck sites, broods were observed more frequently in low velocity habitat (pools, backwaters), but rarely in rapids. Cobble and boulder substrates were still the most dominant substrate type. Contrary to adult ducks, broods were observed most often observed in meandering stream channels, a morphology indicative of low gradient, low velocity stream reaches. Most broods were observed in stream reaches with gravel bars, loafing sites, and...

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McCarthy, Noel, Eileen Taylor, Martin Maiden, Alison Cody, Melissa Jansen van Rensburg, Margaret Varga, Sophie Hedges et al. Enhanced molecular-based (MLST/whole genome) surveillance and source attribution of Campylobacter infections in the UK. Food Standards Agency, julho de 2021. http://dx.doi.org/10.46756/sci.fsa.ksj135.

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This human campylobacteriosis sentinel surveillance project was based at two sites in Oxfordshire and North East England chosen (i) to be representative of the English population on the Office for National Statistics urban-rural classification and (ii) to provide continuity with genetic surveillance started in Oxfordshire in October 2003. Between October 2015 and September 2018 epidemiological questionnaires and genome sequencing of isolates from human cases was accompanied by sampling and genome sequencing of isolates from possible food animal sources. The principal aim was to estimate the contributions of the main sources of human infection and to identify any changes over time. An extension to the project focussed on antimicrobial resistance in study isolates and older archived isolates. These older isolates were from earlier years at the Oxfordshire site and the earliest available coherent set of isolates from the national archive at Public Health England (1997/8). The aim of this additional work was to analyse the emergence of the antimicrobial resistance that is now present among human isolates and to describe and compare antimicrobial resistance in recent food animal isolates. Having identified the presence of bias in population genetic attribution, and that this was not addressed in the published literature, this study developed an approach to adjust for bias in population genetic attribution, and an alternative approach to attribution using sentinel types. Using these approaches the study estimated that approximately 70% of Campylobacter jejuni and just under 50% of C. coli infection in our sample was linked to the chicken source and that this was relatively stable over time. Ruminants were identified as the second most common source for C. jejuni and the most common for C. coli where there was also some evidence for pig as a source although less common than ruminant or chicken. These genomic attributions of themselves make no inference on routes of transmission. However, those infected with isolates genetically typical of chicken origin were substantially more likely to have eaten chicken than those infected with ruminant types. Consumption of lamb’s liver was very strongly associated with infection by a strain genetically typical of a ruminant source. These findings support consumption of these foods as being important in the transmission of these infections and highlight a potentially important role for lamb’s liver consumption as a source of Campylobacter infection. Antimicrobial resistance was predicted from genomic data using a pipeline validated by Public Health England and using BIGSdb software. In C. jejuni this showed a nine-fold increase in resistance to fluoroquinolones from 1997 to 2018. Tetracycline resistance was also common, with higher initial resistance (1997) and less substantial change over time. Resistance to aminoglycosides or macrolides remained low in human cases across all time periods. Among C. jejuni food animal isolates, fluoroquinolone resistance was common among isolates from chicken and substantially less common among ruminants, ducks or pigs. Tetracycline resistance was common across chicken, duck and pig but lower among ruminant origin isolates. In C. coli resistance to all four antimicrobial classes rose from low levels in 1997. The fluoroquinolone rise appears to have levelled off earlier and among animals, levels are high in duck as well as chicken isolates, although based on small sample sizes, macrolide and aminoglycoside resistance, was substantially higher than for C. jejuni among humans and highest among pig origin isolates. Tetracycline resistance is high in isolates from pigs and the very small sample from ducks. Antibiotic use following diagnosis was relatively high (43.4%) among respondents in the human surveillance study. Moreover, it varied substantially across sites and was highest among non-elderly adults compared to older adults or children suggesting opportunities for improved antimicrobial stewardship. The study also found evidence for stable lineages over time across human and source animal species as well as some tighter genomic clusters that may represent outbreaks. The genomic dataset will allow extensive further work beyond the specific goals of the study. This has been made accessible on the web, with access supported by data visualisation tools.

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Leach, Roland M., Mark Pines, Carol V. Gay e Shmuel Hurwitz. In vivo and in vitro Chondrocyte Metabolism in Relationship to the Developemnt of Tibial Dyschondroplasia in Broiler Chickens. United States Department of Agriculture, julho de 1993. http://dx.doi.org/10.32747/1993.7568090.bard.

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Skeletal deformities are a significant financial and welfare problem for the world poultry industry. Tibial dyschondroplasia (TD) is the most prevalent skeletal abnormality found in young broilers, turkeys and ducks. Tibial dyschondroplasia results from a perturbation of the sequence of events in the epiphyseal growth plate, the tissue responsible for longitudinal bone growth. The purpose of this investigation was to test the hypothesis that TD was the result of a failure of growth plate chondrocytes to differentiate and express the chemotactic molecules required for cartilage vascularization. In this investigation in situ hybridization and immunocytochemical techniques were used to study chondrocyte gene products associated with cartilage maturation and vascularization such as osteopontin, osteonectin, type X collagen, and alkaline phosphatase. All markers were present in the growth plate tissue anter or to the TD lesion but were greatly diminished in the TD lesion. Thus, rather than not acquiring the markers for hypertrophy, it appears that the growth plate chondrocytes reach a certain stage of hypertrophy and then de-differentiate into cells which resemble chondrocytes in the prehypertrophic zone. Similar patterns were observed in all TD tissues examined whether the lesions were spontaneous or induced by dietary treatments or genetic selection. The decrease in gene expression can at least be partially explained by the fact that many of the dysplastic chondrocytes show classic signs of apoptosis. These results provide an explanation for the observation that a variety of genes show reduced expression in the TD lesion when examined by in situ hybridization. This would suggest that future research should focus on the earliest detectable stages in the development of TD and examine endocrine and autocrine factors which cause chondrocytes to de-differentiate and undergo premature apoptosis.

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Sippola, Mark Raymond. Particle deposition in ventilation ducts. Office of Scientific and Technical Information (OSTI), setembro de 2002. http://dx.doi.org/10.2172/810494.

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Lawson, R. P., e Patrick Zmarzly. Characterization of Aerosol Inlets and Ducts. Fort Belvoir, VA: Defense Technical Information Center, junho de 2001. http://dx.doi.org/10.21236/ada389706.

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Lawson, R. P. Characterization of Aerosol Inlets and Ducts. Fort Belvoir, VA: Defense Technical Information Center, outubro de 2001. http://dx.doi.org/10.21236/ada390310.

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Lawson, R. P. Characterization of Aerosol Inlets and Ducts. Fort Belvoir, VA: Defense Technical Information Center, setembro de 2001. http://dx.doi.org/10.21236/ada390399.

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Lawson, R. P., e Patrick Zmarzly. Characterization of Aerosol Inlets and Ducts. Fort Belvoir, VA: Defense Technical Information Center, outubro de 2001. http://dx.doi.org/10.21236/ada390460.

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Shapiro, C., W. Zoeller e P. Mantha. Measure Guideline: Buried and/or Encapsulated Ducts. Office of Scientific and Technical Information (OSTI), agosto de 2013. http://dx.doi.org/10.2172/1220233.

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