Types Of Ducks Research Articles

Experimental Study and Analysis of the Generated Electric Power of Salter Duck-Ocean Wave Energy Harvester (OWEH) due to Additional Weight Change and Wave Amplitude

Among ocean energy, wave energy is one of the energy which has not been utilized optimally. As Indonesia has the longest coastline in the world, the development of OWEH is very important. In this paper, an experimental study and analysis of the generated electric power of Salter Duck type OWEH due to additional weight change and wave amplitude was carried out. Salter Duck is geometrically similar to the duck beak invented by Stephen Salter. The incoming wave toward the nodding duck area will move the beak up and down. This up-down motion is used to rotate the gear transmission system and electric generator. In this research, various additional weight was mounted on the Salter Duck beak and its influence to the generated power was studied at various wave amplitude.The experimental results show that additional weight of 300gr and wave amplitude of 0.028m to the model of OWEH can produce maximum electric power of 19.01mWatt with maximum angular acceleration of 0.0427rad/s2. Efficiency of the Salter Duck prototype is 56%.

Comparative analysis of the complete mitochondrial genomes of two types of ducks, peking duck (Anas platyrhychos) and muscovy duck (Cairina moschata)

Peking duck (Anas platyrhychos) and Muscovy duck (Cairina moschata) are two types of domestic ducks and the most popular meat breeds on the world. In this study, we sequenced and compared complete mitochondrial genomes of both breeds. In order to investigate the phylogeny of both breeds within Anseriformes, the sequences of concatenated 12 protein-coding genes were used for phylogenetic analysis. The result was consistent with most of the previous morphological and molecular studies. Our complete mitochondrial genome sequences of both breeds will be useful information in phylogenetics, and be available as basic data for the breeding and genetics.

Perbedaan Somatometri Itik Tegal, Itik Magelang Dan Itik Pengging

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

Performa Pertumbuhan dan Produksi Karkas Mandalung Hasil Hibridisasi antara Entok Jantan (Cairina moschata) dengan Itik Betina (Anas plathyrynchos) (The Growth Performance and Production of Carcass Mandalung, Hybridized from Male Muscovy Ducks (Cairina moschata) and Female Ducks (Anas plathyrynchos))

Crossbreeding between species (hybridization) was conducted to obtain higher average value of offspring trait than the parent trait. The aim of this study was to determine the best type of mule duck and to evaluate the heterosis effect appearing on mule duck obtained. The experimental design used was a randomized block design with two levels of treatment and eight groups based on the hatching period. The treatments were the type of mule duck crossed between muscovy duck male with female cihateup duck (EC) and mule duck crossed between male muscovy duck with female alabio duck (EA). The results showed the growth performance and carcass production of EC and EA mule duck were not significantly different, but mule duck EC tended to show better results than mule duck EA. The percentage of heterosis effect produced by EC and EA mule duck in growth performance and carcass production showed advantages over the parent. EC mule duck had a higher level of heterosis than EA mule duck for some trait observed. EC mule duck can be kept as best crossbreed to produce mule duck with good performance and carcass production.Keywords: mule duck, performance, carcass production, heterosis

De novo assembly and characterization of Muscovy duck liver transcriptome and analysis of differentially regulated genes in response to heat stress.

High temperature is a major abiotic stress limiting animal growth and productivity worldwide. The Muscovy duck (Cairina moschata), sometimes called the Barbary drake, is a type of duck with a fairly unusual domestication history. In Southeast Asia, duck meat is one of the top meats consumed, and as such, the production of the meat is an important topic of research. The transcriptomic and genomic data presently available are insufficient to understanding the molecular mechanism underlying the heat tolerance of Muscovy ducks. Thus, transcriptome and expression profiling data for this species are required as important resource for identifying genes and developing molecular marker. In this study, de novo transcriptome assembly and gene expression analysis using Illumina sequencing technology were performed. More than 225 million clean reads were generated and assembled into 36,903 unique transcripts with an average length of 1,135bp. A total of 21,221 (57.50%) unigenes were annotated. Gene Ontology (GO) analysis of the annotated unigenes revealed that the majority of sequenced genes were associated with transcription, signal transduction, and apoptosis. We also performed gene expression profiling analysis upon heat treatment in Muscovy ducks and identified 470 heat-response unique transcripts. GO term enrichment showed that protein folding and chaperone binding were significant enrichment, whereas KEGG pathway analyses showed that Ras and MAPKs were activated after heat stress in Muscovy ducks. Our research enriched sequences information of Muscovy duck, provided novel insights into responses to heat stress in these ducks, and serve as candidate genes or markers that can be used to guide future efforts to breed heat-tolerant duck strains.

波エネルギー吸収機構を有する浮体の最適形状の変化について

A wave-power generation is rich in type of method; the methods of various sizes have been devised so far. For example, Salter’s Duck type and Pelamis type are famous as the device using the motion of the floating body. Studies on these shapes have been done a lot. And there are a lot of indicators for evaluation of the optimal shape. So, we examined the difference among the optimal shapes obtained by various evaluation factors such as. And recently some studies are attempting to increase the energy absorption efficiency by arranging the multiple units. In such studies, the multi-column array often consists of a floating body which is obtained as an optimal shape in solo use. The shape which is suitable for multiple units, however, does not necessarily coincide with the shape which is suitable for single unit. Therefore, we also examined the difference of the optimal shape between multi-unit and single-unit. As a result, we have confirmed that the optimal shape changes in case of changing number of floating body and the evaluation method.

Seleksi Primer LCO – HCO, Primer bird-f1 – HCO Dan Primer bch – bcl Untuk Amplifikasi Gen COI DNA Mitokondria Itik Magelang (Anas javanica)

Magelang duck is a wild type of local duck from Indonesia. The advantagesof Magelangduckcompare tootherlocalduck from Indonesiaareabilityto livein the highlandsandlowlands and high production of egg and meat. Geneticcharacterization of Magelangduck still not available until now.The aim of the research is selectprimers forampliflying COIgeneof mitochondrialDNAof MagelangduckusingLCO-HCO, bird-f1 -HCO, andbcl-bch primers.The research methodwas DNAisolationfrom Magelangduck. Followed by, selection of primer in silicoto find homologywithin COIsequenceusing ClustalX, Genedoc, and FastPCR programs. Amplification of COIgenewas performedusing PCRwith all primerpairs. Result showed partial homology with all primer in COI sequence. TheamplificationusingtheLCO-HCO primer produced primerdimer.Primerbirdf1-HCOand bch-bcl primers showed no amplification. Key words: Magelang duck, COI gene, mitochondrial DNA, primer

Analysis of abietic acid and dehydroabietic acid residues in raw ducks and cooked ducks

Rosin was once widely used for removal of duck feathers in China and is still being used secretly in some poultry processing enterprises. Abietic acid (AA) and dehydroabietic acid (DHAA) are the major compounds of rosin. In the present study, 90 duck samples were collected for investigation of AA and DHAA residues. Abietic acid and DHAA were simultaneously detected in 13 out 40 raw ducks, 8 out of 26 water-boiled salted ducks, and 7 out of 24 roasted ducks, respectively. In positive samples, averages of AA were significantly higher than those of DHAA in positive samples of the 3 types of ducks (P < 0.05). Averages of AA and DHAA in positive raw ducks were significantly higher than those in positive roasted ducks (P < 0.05). The results indicated that almost one-third of raw ducks were defeathered by means of rosin-containing defeathering agent, and cooking processes could reduce the AA and DHAA residues to some extent, but could not eliminate them completely.

Characterization of Clade 2.3.2.1 H5N1 Highly Pathogenic Avian Influenza Viruses Isolated from Wild Birds (Mandarin Duck and Eurasian Eagle Owl) in 2010 in Korea

Starting in late November 2010, the H5N1 highly pathogenic avian influenza (HPAI) virus was isolated from many types of wild ducks and raptors and was subsequently isolated from poultry in Korea. We assessed the genetic and pathogenic properties of the HPAI viruses isolated from a fecal sample from a mandarin duck and a dead Eurasian eagle owl, the most affected wild bird species during the 2010/2011 HPAI outbreak in Korea. These viruses have similar genetic backgrounds and exhibited the highest genetic similarity with recent Eurasian clade 2.3.2.1 HPAI viruses. In animal inoculation experiments, regardless of their originating hosts, the two Korean isolates produced highly pathogenic characteristics in chickens, ducks and mice without pre-adaptation. These results raise concerns about veterinary and public health. Surveillance of wild birds could provide a good early warning signal for possible HPAI infection in poultry as well as in humans.

Differences in Pathogenicity, Response to Vaccination, and Innate Immune Responses in Different Types of Ducks Infected with a Virulent H5N1 Highly Pathogenic Avian Influenza Virus from Vietnam

In a previous study, we found clear differences in pathogenicity and response to vaccination against H5N1 highly pathogenic avian influenza (HPAI; HA dade 2.3.4) between Pekin (Anas platyrhynchos var. domestica) and Muscovy (Cairina moschata) ducks vaccinated using a commercial inactivated vaccine (Re-1). The objective of the present study was to further investigate the pathogenicity of H5N1 HPAI viruses in different species of ducks by examining clinical signs and innate immune responses to infection with a different strain of H5N1 HPAI virus (HA clade 1) in two domestic ducks, Pekin and Muscovy, and one wild-type duck, mallard (Anas platyrhynchos). Protection conferred by vaccination using the Re-1 vaccine against infection with this virus was also compared between Pekin and Muscovy ducks. Differences in pathogenicity were observed among the virus-infected ducks, as the Muscovy ducks died 2 days earlier than did the Pekin and mallard ducks, and they presented more-severe neurologic signs. Conversely, the Pekin and mallard ducks had significantly higher body temperatures at 2 days postinfection (dpi) than did the Muscovy ducks, indicating possible differences in innate immune responses. However, similar expression of innate immune-related genes was found in the spleens of virus-infected ducks at this time point. In all three duck species, there was up-regulation of IFN-alpha, IFN-gamma, IL-6, CCL19, RIG-I, and MHC class I and down-regulation of MHC class II, but variable expression of IL-18 and TLR7. As in our previous study, vaccinated Muscovy ducks showed less protection against virus infection than did Pekin ducks, as evidenced by the higher mortality and higher number of Muscovy ducks shedding virus when compared to Pekin ducks. In conclusion, infection with an H5N1 HPAI virus produced a systemic infection with high mortality in all three duck species; however, the disease was more severe in Muscovy ducks, which also had a poor response to vaccination. The differences in response to virus infection could not be explained by differences in the innate immune responses between the different types of ducks when examined at 2 days dpi, and earlier time points need to be evaluated.

Truncation of the NS1 Protein Converts a Low Pathogenic Avian Influenza Virus into a Strong Interferon Inducer in Duck Cells

The NS1 protein of influenza A viruses is known as a nonessential virulence factor inhibiting type I interferon (IFN) production in mammals and in chicken cells. Whether NS1 inhibits the induction of type I IFNs in duck cells is currently unknown. In order to investigate this issue, we used reverse genetics to generate a virus expressing a truncated NS1 protein. Using the low pathogenic avian influenza virus A/turkey/Italy/977/1999 (H7N1) as a backbone, we were able to rescue a virus expressing a truncated NS1 protein of 99 amino acids in length. The truncated virus replicated poorly in duck embryonic fibroblasts, but reached high titers in the mammalian IFN-deficient Vero cell line. Using a gene reporter system to measure duck type I IFN production, we showed that the truncated virus is a potent inducer of type I IFN in cell culture. These results show that the NS1 protein functions to prevent the induction of IFN in duck cells and underline the need for a functional NS1 protein in order for the virus to express its full virulence.

Sex chromosome linkage of chicken and duck type I interferon genes: further evidence of evolutionary conservation of the Z chromosome in birds.

Type I interferons (IFNs) are a family of proteins that are predominantly expressed in response to viral infection. Two serologically distinct forms of type I IFN, designated ChIFN1 and ChIFN2, have recently been recognized in the chicken. ChIFN1 is encoded by a cluster of ten or more intronless genes, whereas ChIFN2, whose primary sequence is 57% identical, is encoded by a single intronless gene. By fluorescence in situ hybridization we now demonstrate that the genes for ChIFN1 and ChIFN2 are all located on the short arm of the chicken Z chromosome. This assignment was confirmed by results that showed that DNA from male (ZZ) chickens yielded approximately twofold stronger Southern blot signals with ChIFN1 and ChIFN2 hybridization probes than DNA from females (ZW). Attempts to determine differences in IFN production between male and female chickens failed owing to a high degree of variation in virus-induced IFN expression between individuals of both sexes. Sex linkage of IFN genes was also observed in domestic ducks: fluorescence in situ hybridization of duck metaphase chromosomes with a duck type I IFN probe was confined to the terminal region of the long arm of the Z chromosome. Thus, in contrast to mammals, which have their IFN genes on autosomes, birds have the type I IFN genes on the sex chromosome.

Isolation and characterization of muscovy (Cairna moschata) duck insulin

Ducks (Anatidae Family, Anseriform order) are divided in two genera: Pekin duck (Anas platyrhynchos genus) and Muscovy duck (Cairina moschata genus) and differ for their number of liver insulin receptors (despite rather similar plasma insulin levels). The possibility that the presence of different endogenous insulins account for the difference in insulin receptor number between the two duck species led us to purify, sequence and characterize the binding properties of Muscovy duck insulin. The sequence of Muscovy duck insulin (measured mass: 5729. 11) was indentical to that described in two other species from the Anseriforme order: Pekin duck or goose. The binding affinity of Muscovy duck insulin for rat liver insulin receptors (either membrane bound or solubilized receptors) was lower than that of porcine insulin (0.3), which most likely accounts for the low biological potency of Pekin duck insulin previously described. In contrast, liver receptors from chicken and both duck species exhibited the same affinity for duck and porcine insulin suggesting the presence of specific changes in the structure of binding sites of bird liver insulin receptors. The decrease in the number of insulin receptors in Muscovy duck liver is not therefore the consequence of a change at the level of the insulin molecule itself. As discussed, among bird insulins, the hypoactive “duck type” insulin would have appeared after the hyperactive “chicken type” insulin during the evolution of Aves.

Embryonic origin of skeletal muscle cells in the iris of the duck and quail.

The origin of skeletal muscle cells in avian iris muscle was investigated by quantitative analysis of heterochromatin profiles at the electron-microscopic level in irides of six types of quail-duck chimeras. Each of the following tissues was transplanted into the head region from quail to duck between stages 9 and 10: cranial neural crest; trunk neural crest; midbrain and adjacent mesoderm; forebrain; forebrain without neural crest; and forebrain without neural crest and mesoderm. The average ratio of heterochromatin profile to nucleus profile in iris skeletal muscle cells was high (quail type) in the dorsal iris, but low (duck type) in the ventral iris of the chimeras resulting from isotopic transplantation of cranial neural crest. Heterotopic transplantation of trunk neural crest to cranial position resulted in failure of development of skeletal muscle cells in the dorsal iris, but not in the appearance of skeletal muscle cells in the ventral iris. The average ratio of heterochromatin profile to nucleus profile in iris skeletal muscle cells was high in the chimeras resulting from transplantation of midbrain region and the chimeras resulting from transplantation of forebrain region, intermediate in the chimeras resulting from transplantation of forebrain region without neural crest, and low in the chimeras resulting from transplantation of forebrain region without neural crest and mesoderm. These results indicate that the skeletal muscle cells in the dorsal iris are of cranial neural crest origin while those in the ventral iris are not, and could possibly arise from cranial mesoderm.

Resultats d'une enquete serologique effectuee en France (vendee) Chez le canard a rotir

The sera of domestic ducks were examined for antibodies to several infectious agents of palmipeds during the winter of 1982 in the abattoirs in la Vendée, an important region of duck production in the West of France. The performance of each batch and their antecedents was also studied. In Barbary ducks and crossbred ducks (from male wild ducks and female domestic ducks), antibodies were found to the virus of egg drop syndrome 16 (EDS 76), to Newcastle disease virus (NDV), to duck hepatitis virus and to chlamydia psittici. In Nantais ducks (resulting from a cross between Khaki Campbell and Pekin ducks), antibodies were detected against EDS 76 virus, duck hepatitis virus and chlamydia. The frequency and levels of antibodies varied between types or strains of ducks. About 50% of the Barbary ducks had high levels of antibodies to EDS 76 virus, whereas 70 to 80% of crossbred and Nantais ducks had these antibodies but at very low levels. Virtually 100% of Barbary ducks had high levels of antibodies against Derzsy's disease virus whereas only 10% of the batches of crossbred ducks had antibodies at varying levels. The proportion of batches with antibodies against NDV was higher in crossbred ducks (25%) than in Barbary ducks (2%) and the titres were low. Antibodies to duck hepatitis virus, when present, were of a high titre irrespective of type or strain of duck. Infection by chlamydia was suspected in 3% of lots of Barbary ducks, in 33% of lots of crossbred ducks, and in 3.7% of lots of Nantais ducks. These findings are discussed and considered in relation to breeding history and performance of the flocks. The EDS 76 virus could in certain circumstances cause weight loss in male Barbary ducks. These epidemiological observations need to be confirmed experimentally.

Fundamental Research on Multi-Hull-Type Floating Wave Energy Converter

A new multi-hull-type floating wave energy converter, which consists of multi floating bodies with asymmetrical cross section and the bars connecting these bodies, is proposed and fundamental studies on this converter are conducted. Wave energy absorbed by this converter is induced from the motions of the floating bodies and the connecting bars in waves.The authors developed the method to calculate the hydrodynamic forces and moments acting on this converter by using Okusu method, in which the hydrodynamic interaction between the floating bodies are taken into account. Here they derived the equation of the motions of floating bodies and connecting bars in waves by balancing the hydrodynamic forces on floating bodies with the forces on connecting bars.For the twin-hull-type floating wave energy converter which consists of two salter duck type bodies and a connecting bar, hydrodynamic forces, motions, efficiencies of wave energy absorption etc. were calculated as model experiments were carried out.It is found that the results of calculation by this method are in agreement with the ones by model experiments and the twin-hull-type floating wave energy converter is capable of absorbing more stable wave energy than that of the single-hull-type.