Ducks - Science topic

For many complex optimization problems, the solution process often involves exploring multidimensional space, balancing global and local solutions, and improving the efficiency of the algorithm. In order to improve the optimization efficiency, this paper proposes a new metaheuristic algorithm called the Duck Foraging Algorithm (DFA). The algorithm...

The article presents the results of breeding hybrid ducklings of the Agidel 34 cross when the probiotic drugs Vitafort and Lactobifadol are included in the diet. It was found that periodic feeding with probiotics for seven days followed by a one-week break from the age of one day to the end of cultivation (42 days) provides an increase in livestock...

ÖZET Evcil kümes hayvanlarından olan kazların lokal cinslerin hastalıklara direncinin yüksek olduğu ve kaliteli ete sahip oldukları bilinmektedir. Dünyada olduğu gibi Türkiye'de kaz yetiştiriciliği yapılmaktadır. Ancak ülkemizde kazlar için kullanımı ruhsatlı ilaç bulunmamaktadır. Genel olarak ördeklerde kullanılan antibiyotikler (amoksisilin, klor...

Riemerella anatipestifer infection is a critical disease that is a major threat to the poultry industry worldwide. The adhesion and invasion of host cells are key steps in the primary stages of bacterial infection. However, the outer membrane proteins that mediate these events in R. anatipestifer are poorly characterized. In this study, the PorV an...

In recent years, duck meat products have been widely promoted in supermarkets and retail outlets, because of their distinctive flavor. The research aimed to assess the mycotoxin content and veterinary drug residues in duck meat purchased from 8 markets in Taizhou, China. Aflatoxin B1(AFB1), Aflatoxin M1(AFM1), Ochratoxin A(OTA), Ochratoxin T-2(OTAT...

Anthropogenically mediated hybridization can lead to several outcomes, with the most severe being hybrid swarms and the genetic extirpation of local populations. With the frequency of introductions by humans increasing, understanding the genetic consequences is critical for future conservation actions. Here, we investigate the consequences of domes...

Livestock Production and Management (LPM) refers to the application of scientific principles to the care, breeding, feeding, housing, and overall management of domesticated animals for optimum productivity and economic gain. It encompasses both traditional and modern systems of animal husbandry across species such as: • Cattle and buffaloes-primari...

The objective of this study was to discuss the influence of the environment on the macro–microstructure features of the eyelids of two birds: hooded crow, Corvus cornix, and Muscovy duck, Cairina moschata, which also show lymphoid follicles, lymphocytes and some immune cells in the eyelid mucosa and their effect on healthy eyes. In both birds, nume...

An 11‐year‐old intact female Nova Scotia Duck Tolling Retriever presented to the authors’ referral hospital with acute abdominal pain and vaginal discharge and suspicion of pyometra. Ultrasonographic examination revealed a large echogenic mass in the caudal abdomen in the region of the left uterine horn. Computed tomography (CT) demonstrated a larg...

The current study investigated the optimal standardized ileal digestible (SID) methionine (Met) requirement for the growth performance of white Pekin ducks from hatching to 21 days of age. A total of 288 one-day-old male white Pekin ducklings were initially weighed and randomly assigned to six dietary groups, with six replicates per group. Eight du...

In this article, I explore how films such as Princely India (Owen Crump, 1948) and Royal Duck Shoot (Owen Crump, 1948) produced by the Short Subjects Department at Warner Bros. reflect tensions between historical accuracy and documentary aesthetics. I juxtapose these films with a set of photographs taken by an unknown American soldier stationed in...

Knowledge of physical-morphological attributes of plant diaspores contributes to correct description, conservation and optimized agronomic use of the species. The objective of the study was to perform the physical and morpho-biometric characterization and establish biometric correlations of fruits and seeds of Copaifera arenicola. For the study, th...

In "Classic Literature and Animation: All Adaptations are Equal, but Some are More Equal than Others" (2007), Paul Wells states that, when “pure”, animation is “clearly the most effective and transparent translator of the original text” (p. 202). However, in counter to the praise that he awards the animated adaptation, Wells adds a condition, in th...

O conhecimento de atributos físico-morfológicos de diásporos vegetais contribui para a descrição correta, para a conservação e uso agronômico otimizado da espécie. O objetivo do estudo é realizar a caracterização física e morfobiométrica e correlações biométricas de frutos e sementes de Copaifera arenicola endêmica da Caatinga. No Laboratório de An...

Understanding the influence of cultural practices on maternal health is crucial in addressing the nutritional challenges faced by pregnant women in rural Bangladesh. Despite improvements in maternal and child health indicators, food taboos remain prevalent, impacting nutritional and health outcomes of vulnerable populations. This qualitative study...

The study conducted in one of the private fields for raising Peking ducks in Al-Muthanna Governorate, starting from 14/2/2025 to10/4/2025. 60 one-day-old Peking ducklings were raised from unsexed Peking ducks with an average weight of 42g. The ducklings were prepared from the local markets in Diwaniyah Governorate, to demonstrate the effect of stud...

The study was conducted in the field of waterfowls birds breeding / College of Agriculture / University of Basrah during the period from 5/12/2023 to 1/30/2024, to detect the genetic polymorphism of the (DCT) gene. In this study (270 chicks from three genetic groups of local ducks were used according to the feather colours (white, gray) and mallard...

In order to show the impact of fermented feed including Iraqi bio-enhancer on some immune and physiological aspects of ducks, this study was carried out at one of the domestic duck breeding farms in the Al-Muthanna Governorate between January 14, 2025, and March 10, 2025. I raised 75 one-day-old chicks, each weighing 42 grams on average. The duckli...

Background: Duck eggs are one of the foodstuffs that are very susceptible to damage caused by microbes. The types of microbes that contaminate eggs are mainly from the Gram-negative bacteria type, including Salmonella. Objectives: The purpose of this study was to determine the salmonella sp bacteria in duck eggs sold in Larangan village Materials a...

Metabolic syndrome is a growing global health problem. Long-term treatment for metabolic syndrome causes side effects. Therefore, the use of nutraceuticals could also be considered. This study analyzed the effect of the administration of striped catfish oil and turmeric extract on tumor necrosis factor-α (TNF-α) levels and homeostasis model assessm...

Dam construction, a common anthropogenic activity, leads to significant habitat loss and fragmentation, mainly impacting aquatic ecosystems and also the surrounding terrestrial habitats. In addition, dams alter natural river flow impacting heavily on water-dependent bird species and other aquatic fauna. In this study, we examined a dam site abandon...

This study investigates the effects of incorporating paper mulberry (Broussonetia papyrifera L.) powder into the diets of Cherry Valley ducks on growth performance, serum biochemistry, and the gut microbiome. A total of 350 14-day-old male Cherry Valley ducks were randomly assigned to five groups receiving diets with 0%, 4%, 6%, 8%, and 10% paper m...

Objective To investigate the intracellular localization and binding of duck invariant chain (Ii) to major histocompatibility complex (MHC) class Iα or MHC class IIβ molecules. Methods First, the genes of duck Ii , MHC Iα , and MHC IIβ were amplified by PCR, cloned into expression plasmids, and then sequenced to compare homology between ducks and s...

As the coastal population continues to expand, the risk of experiencing social and economic losses due to the effects of a changing climate also increases. Although considerable advances have been achieved in terms of developing numerical process-based models for shoreline change, ensuring reliable predictions remains a formidable task. We propose...

Global climate change and sea level rise pose a dire threat to life and property of coastal communities. Vegetation has been shown to act as a vanguard against coastal hazards in the nearshore regions by attenuating wave energy, reducing storm surges, and preventing erosion (Jadhav et al., 2013; Zhu et al., 2023). To improve our understanding of wa...

Duck enteritis virus (DEV), goose parvovirus (GPV), and muscovy duck parvovirus (MDPV) all have similar symptoms after infection, such as severe diarrhea, which seriously affects the healthy development of the waterfowl industry. Hence, it is important to devise a rapid and precise assay for the detection of these three viruses. In this study, a Ta...

The aim of this study was to evaluate selected reproductive traits and estimate selected meat traits of male and female ducks of strains P-11 and P-22 during the rearing period, in order to analyse the differences between the two duck populations in terms of these traits in three consecutive generations, i.e., in the years 2020–2022. The birds were...

Scanning terrestrial lidars can simultaneously measure beach topography and sea-surface elevations across the surf-zone at high resolution. These maps of sea-surface elevations can be used to extract wave properties, which can then be inverted for depth and combined with beach topography observations, offering an exciting avenue for quantifying the...

Tembusu virus (TMUV), an emerging avian orthoflavivirus, causes severe economic losses due to egg-drop syndrome and fatal encephalitis in domestic waterfowl. To combat this threat, the host immune system plays a crucial role in controlling and eliminating TMUV infection. Understanding the mechanisms of this immune response is thus vital for develop...

In Fennoscandia, waterbirds have declined over several decade, and this decline could be linked to problems in the breeding success and loss of foraging habitat provided by wetlands. Availability of aquatic invertebrates is crucially important for ducks during the breeding season, and especially for young ducklings. However, the relationship of inv...

In this 2024 report for the province of Buenos Aires Argentina, progress was made with the distribution models of the 14 species of ducks as numerical tools. These combine observations of the presence and abundance of species with environmental estimates to predict distribution in different landscapes.

The mottled duck ( Anas fulvigula ) is nonmigratory and a priority species for regional conservation and management because of its limited range and declining population trajectory in the western Gulf Coast (WGC) of Louisiana and Texas, USA. We developed multistate dead‐recovery models for banding and recovery data (1997–2020) to evaluate potential...

Pulsed electric field (PEF), a novel non-thermal processing technology, shows great potential in meat processing by regulating macromolecule metabolism and food quality. This study examined the effects of PEF pretreatment at varying electric field strengths (1, 2, and 3 kV/cm) and durations (30, 60, and 90 s) on the color, texture, moisture distrib...

Objectives This study aimed to explore food taboos among indigenous pregnant women in Bangladesh. Methods A mixed-method study was conducted among the Tripura, Chakma, and Marma communities in Khagrachari district of Bangladesh. To identify the list of existing tabooed foods, six focus group discussions were conducted with 36 women aged 15 years a...

Hatiya and Nijhum Dwip are the most two important islands in the Meghna River Estuary in Bangladesh, especially in terms of marine fisheries resources. The purpose of the study was to investigate the diversity and community structure of marine fishes in these areas during pre-monsoon. A total of 27 fish species were found under 9 orders, among whic...

Morphometric traits or body conformation traits also called linear body measurements are important in predicting marketing body weight especially for commercial breeders and producers. The total number of reared Domyati ducklings are 168 hatched, at marketing age (8 wks.) 44 brown and 14 white Domyati ducks were used to estimate the body weight and...

Desde hace años, pequeños agricultores de la Amazonía peruana plantan árboles en predios privados o comunales para asegurar madera, aumentar ingresos y prevenir la degradación ambiental. Sin embargo, estos esfuerzos, a menudo sin asistencia técnica, logran resultados moderados debido a la falta de conocimientos en gestión, selección de especies, si...

This study was conducted to evaluate the effects of feeding regimens and dietary methionine (Met) levels on the growth performance and feather growth of Cherry Valley ducks from 29 to 49 days of age. A 2 × 3 factorial arrangement was employed, consisting of two feeding regimens (ad libitum or “5+2” feed restriction: 5 days ad libitum + 2 days of fa...

The Kerinci duck is a breed native of Jambi Province in Indonesia, is noteworthy for its various eggshell color. This study's primary objective was to explore the connection between genetic variations in the LOC101800257 gene and the eggshell color and egg weight of Kerinci ducks. For this investigation, a total of 46 Kerinci ducks were utilized fo...

BACKGROUND Improving the permeability of eggshell (ES) and eggshell membrane (ESM), while decreasing the albumen viscosity are conducive to accelerate the penetration rates of sodium chloride (NaCl) during the processing of salted duck eggs. This study systematically evaluated the effect of mono‐ and multi‐frequency ultrasound (US) on ES/ESM permea...

Since 2021, an epidemic disease characterized with hydrosalpinx fluid syndrome (HFS) has been circulating in the breeding and laying Sheldrake ducks in China, which seriously endangers the healthy development of the duck industry. The pathogen of the disease was tract to avian metapneumovirus subtype C (aMPV/C) causing egg-drop and acute upper resp...

Marriage, as a topic of ethnographic and historical exploration, ties together kinship, politics, economics, and faith in complex and significant ways. In the United States, federal and state governments have used legal marriage to create insiders and outsiders along lines of “race,” sexuality, and religion. Those who have not been allowed to marry...

This study aims to identify and compare the reproduction performance of the second generation (F2) of reciprocal crossbred between Tegal and Magelang duck. Crossing male (♂) Magelang duck and female (♀) Tegal duck produces Maggal duck while crossing male (♂) Tegal duck and female (♀) Magelang duck produces Gallang duck. Maggal duck and Gallang duck...

The current study was conducted to compare the effect of beak trimming and feather spraying with bitter taste compound (almond oil) on feather pecking behavior and duck welfare. A total of 63 healthy male 2-weeks-old Muscovy ducklings were randomly allocated to 3 groups. The first group was the control group (no beak trimming and no feather sprayin...

A field‐calibrated morphodynamic model (MIKE21) is used to investigate the importance of the dimensions of a rip channel across an outer sand bar to the hydrodynamics and morphological evolution of an inner sand bar and rip channel for a range of initial bathymetries and wave conditions. The model was driven with offshore wave conditions and ideali...

Introduction Phosphatase and tensin homolog (PTEN) is a well-established tumor suppressor gene that antagonizes the PI3K/AKT signaling pathway and plays a critical role in regulating both innate and adaptive immune responses. However, its function in avian species, particularly in ducks, remains largely unexplored. Methods In this study, the full-...

The egg yolks play a significant role in preventing temperature related damages to the sperm’s acrosome and plasma membrane during cryopreservation. The present study aims to evaluate various egg yolk extenders in relation to quality indicators of post-thawed semen from Tapri goat bucks. Thus, total 60 ejaculates (n= 15/ animal) were collected from...

PRL Rajo Tigo Selo Farmer Group is a community service partner of Bukittinggi Prima Nusantara University in 2024. The partner is an environmentally friendly farmer group located in Jorong Babukik, Nagari Kamang Mudiak, Agam Regency, with 21 group members. These partners are divided into three divisions: the Agriculture Division, the Livestock Divis...

This study aimed to characterize the duck circovirus circulating in Northern Vietnam based on complete genome sequences. Between 2023 and 2025, 45 pooled tissue samples were collected from nine duck flocks in several provinces in Northern Vietnam. Of the 45 samples tested, 16 (35.56%) were positive for the DuCV genome, as determined using conventio...

In response to intensified agricultural impacts on Aotearoa New Zealand's river systems, our study sought to demonstrate a novel approach for assessing freshwater quality through environmental DNA (eDNA) and promote a holistic understanding of ecological health. Employing 13 eDNA tree‐of‐life metabarcoding assays alongside 11 standard physicochemic...

This paper examines how the slope of the merit-order curve and the share of non-zero-dollar dispatched energy affect photovoltaic (PV) price cannibalization and the declining market value of all generation types. Using historical merit-order data from Alberta, Canada—during its coal-to-gas transition—we simulated the introduction of zero-marginal-c...

Egg weight is a primary economic trait in poultry breeding. Putian Black duck, an excellent local laying duck breed in Fujian Province, includes two different strains, black feather strain and white feather strain. The white feather strain of Putian Black duck is also known as Putian White duck. Except for the different feather colors, these two st...

The United Kingdom (UK) is home to many local and rare livestock breeds. The local breed populations are highly adapted to specific environments in the UK and these and other rare breeds provide solutions to niche needs. Rare breeds often contribute more than expected to overall species genetic diversity, which is important because genetic variatio...

The remaining feed in the feed troughs affects the feeding management of flat-raised meat ducks. Ground-contact detection methods all involve modifications to the feeding troughs, but the breeding setting of flat-raised meat ducks does not allow for on-site electrical wiring installation. Additionally, the existing non-contact methods do not direct...

Quantifying uncertainty of regional shoreline evolution is critical for success in risk-based coastal protection practices. Shoreline changes result from multiple interactive coastal processes such as subaqueous sediment transport processes driven by nearshore waves, currents, and sea level change. By considering those driving forces as stochast...

Meat color is the most intuitive measure of meat quality and has a significant impact on consumer preference. To explore the molecular mechanisms affecting duck pectoralis meat color, the phenotypic traits of Cherry Valley duck (CV, eight males and eight females) and Huai Fu duck (HF, eight males and eight females) were compared; three males and th...

Technical article about the production methods of earthworms and utilization of earthworm meal as an alternative protein source in meat type ducks

An experiment was conducted to determine whether adding duckweed fertilized with bioslurry to the diet corresponds to duck performance and heavy metal concentration in their meat. The study was designed using a completely randomized design. The treatments were different levels of adding duckweed as a diet component, as follows: Basal feed (control,...

Background: Antimicrobial resistance (AMR) is an escalating concern in both human and veterinary medicine, particularly in the poultry sector, where antibiotic usage is substantial. Streptococcus spp. and Staphylococcus aureus are important pathogens in waterfowl, causing systemic infections. However, there is a significant lack of data regarding t...

In February 2024, H5N1 highly pathogenic avian influenza viruses (HPAIVs)of clade 2.3.4.4b were first reported in dairy cows in the USA. Subsequent multiple outbreaks on dairy farms and sporadic human infections have raisedsubstantial public health concerns. In the same year, four H5N1 HPAIVs ofclade 2.3.4.4b were isolated from ducks and geese in l...

Prevalence of diseases and commonly used drugs in poultry in Jamalpur district, Bangladesh. Arnab Kumer Sutra Dhar1, Ashing Marma2 and Dr. Sajeda Sultana3* Abstract An investigation was carried out to assess the prevalence of diseases, method of diagnosis, and commonly used drugs in poultry farms in Sadar Upazila, Jamalpur, Bangladesh. A total of...

Effective genetic diversity assessment is pivotal for sustainable fisheries management, yet standardized DNA extraction methods for non-model marine species like Harpadon nehereus (Bombay duck) remain limited. This study optimizes DNA extraction protocols to enhance the reliability of Random Amplified Polymorphic DNA (RAPD)-PCR analysis for H. nehe...

Background: Antimicrobial resistance (AMR) poses a growing threat to veterinary medicine and food safety. This study examines Escherichia coli antibiotic resistance patterns in ducks, focusing on multidrug-resistant (MDR) strains. Understanding resistance patterns and predicting MDR occurrence are critical for effective intervention strategies. Met...

Wadden Sea chapter in the East Atlantic Flyway Assessment 2023 with current results of long-term monitoring of migratory birds in the international Wadden Sea of Denmark, Germany and the Netherlands. The Wadden Sea is of great importance for many of the waterbird populations that occur in the East Atlantic flyway. The area is a crucial stopover and...

The innovative genetically engineered vaccinations can address the drawbacks of traditional vaccines, including atavism, virulence return, and risk of virus transmission, which are essential for limiting the spread of duck plague and ultimately eradicating it. ICP8 is the only single‐stranded DNA‐binding protein (SSB) of herpesviruses and is requir...

Background Birds have evolved morphologically diverse neck structures in order to adapt to different foraging styles. Studying avian neck structure and function can not only help us understand their evolutionary processes and ecological roles, but also use them as a research model for modular structure, providing a valuable reference for exploring...

Duck circovirus (DuCV) infection is an immunosuppressive disease that affects ducks and causes severe damage to their immune system. To elucidate the epidemiological characteristics of DuCV infection in China, a total of 2944 waterfowl samples were collected from 17 provinces from January to October 2022, and 612 DuCV-positive samples were identifi...

Croton cajucara Benth and Copaifera reticulata Ducke are prominent species in the traditional medicine of the Amazon region of Brazil. Copaifera species produce oil resin rich in bioactive diterpenes, and C. cajucara is a prolific producer of the diterpene 19-nor-clerodane trans-dehydrocrotonin (t-DCTN). This research aimed to develop a self-nanoem...

Introduction Duck production in Egypt plays a significant role in the poultry sector. However, viral infections, such as avian influenza virus (AIV), Newcastle disease virus (NDV), and duck hepatitis A virus (DHAV), pose a significant threat to ducks, leading to substantial economic losses. Despite their impact, data on these duck pathogens in Egyp...

Feral dogs (Canis familiaris) are an emerging threat to biodiversity on Navarino Island, Chile, where they have become apex predators in the absence of natural carnivores. This study evaluated the spatial distribution of feral dogs and their impacts on native species, including guanacos (Lama guanicoe) , upland geese (Chloephaga picta) , and flight...

Accurate body dimension and weight measurements are critical for optimizing poultry management, health assessment, and economic efficiency. This study introduces an innovative deep learning-based model leveraging multimodal data—2D RGB images from different views, depth images, and 3D point clouds—for the non-invasive estimation of duck body dimens...

Since their emergence in Guangdong, China, in 1996, Gs/GD H5 highly pathogenic avian influenza viruses (HPAIVs) have diversified into multiple clades, spreading globally through wild bird migrations and causing substantial losses in poultry and wildlife. In South Korea, HPAIVs, including H5N1, H5N8, and H5N6 subtypes, have been repeatedly introduce...

Purpose: The aim of this community service program is to increase entrepreneurship knowledge and skills in making a variety of food products from duck eggs and duck meat from ducks that are no longer productive. Method: The activity method is providing training about entrepreneurship, and demonstrations of processing ducks into various ready-to-eat...

There is nothing wrong or unusual about the food at Ang's Chinese restaurant. In fact, the roast duck served there is excellent, and the Lonely Planet's guidebook assures you that its hot-and-sour soup is special. It's just the way the place looks. The yard is surrounded by high walls with razor wire and surveillance cameras. Two security guards wa...

In the last few weeks, Kim Jong Il has inspected a pig farm, a mine, a solar thermal energy research unit, a restaurant, an orchestra, and even gave field guidance to the Tudan Duck Farm on how to raise these pesky birds, where he reportedly enjoyed an art performance given by the members of the art group of the Pyongyang Poultry Guidance Bureau at...

The remarkable morphological disparity of the animal kingdom is underpinned by changes in embryonic development across the tree of life; as such, deciphering evolutionary patterns of developmental divergence depends on investigations of different species across a range of comparable developmental stages. Among the most influential ideas regarding s...

The Critically Endangered Brazilian Merganser Mergus octosetaceus is currently found at only three locations in Brazil. For nest-sites, it depends on pre-existing natural cavities, including tree holes, terrestrial crevices or crevices in rocky outcrops. During the 2023 and 2024 breeding seasons, we used a camera trap to monitor breeding behaviour...

As an emerging flavivirus, Duck Tembusu virus (DTMUV) causes severe neurological disorder and acute egg drop syndrome in poultry. Herein, we report the development of a highly effective mRNA vaccine against DTMUV using lipid nanoparticle (LNP) delivery technology. We engineered an mRNA construct encoding the pre-membrane (prM) and envelope (E) prot...

This research explores the interaction between postmodernism and socio-political transformations in Philip Tew’s novel "Clark Gable and His Plastic Duck." Through an in-depth examination of the narrative strategies and thematic investigations utilized by Tew, the study clarifies how the narrative mirrors and analyzes the socio-political environment...

Toxoplasma gondii is an obligate intracellular protozoan parasite which affects humans and a wide range of animals. The aim of this study was to investigate the seroprevalence of T. gondii in domestic birds from family farms in north central Algeria. Blood samples of 121 chickens, 14 geese and 7 ducks were collected and examined for the presence of...

Copaiba oleoresin is a natural product widely used in traditional Amazonian medicine in the treatment and cure of various ailments, having various biological activities such as anti-inflammatory, cicatrizant, antiseptic and antimicrobial. Cancer is one of the main public health problems, being the cause of thousands of deaths around the world. In v...