نتایج جستجو برای: mallard duck
تعداد نتایج: 5348 فیلتر نتایج به سال:
Cryopreservation induces oxidative stress on sperm due to an increase in the number of reactive oxygen species (ROS), thereby resulting decreased quality. ROS's destructive potential is normally counteracted by their innate antioxidant system consisting enzymes, which include superoxide dismutase (SOD). This study aimed assess quality semen from Itik Pinas-Khaki (IP-Khaki) drakes that were cryo...
In China and South East Asia, the duck (common duck) is important in egg production for human consumption. Plumage color is a breed characteristic and of economic importance, together with egg production. Our aim in this study was to investigate the inheritance of plumage color in three Chinese indigenous egg-type duck breeds, Shan Ma (S), Putian White (F) and Putian black (P), and some of thei...
Schistosomatidae are an actively studied ecological group of trematodes. Their ability to cause various parasitic diseases in animals and humans makes them interesting object study for a number research centres worldwide. One the commonest species this is Bilharziella polonica (Kowalewsky, 1895), whose mature stages have been recorded aquatic semi-aquatic birds Uzbekistan. Our team established ...
BACKGROUND Newcastle disease (ND) caused by virulent Newcastle disease virus (NDV) is an acute, highly contagious and fatal viral disease affecting most species of birds. Ducks are generally considered to be natural reservoirs or carriers of NDV while being resistant to NDV strains, even those most virulent for chickens; however, natural ND cases in ducks have been gradually increasing in recen...
BACKGROUND: Protozoa are common in poultry and otherbirds and can cause mild to severe disease. OBJECTIVES: Thisstudy was concerned with the prevalence of parasitic protozoa inwild waterfowl in Caspian sea lagoons in the North of Iran.METHODS:Atotal of 293 waterfowl belonging to various generaincluding Tadorna tadorna (common shelduck),Aythya fuligula(Tufted duck), Aythya ferina (Common puchard...
Poyang Lake is situated within the East Asian Flyway, a migratory corridor for waterfowl that also encompasses Guangdong Province, China, the epicenter of highly pathogenic avian influenza (HPAI) H5N1. The lake is the largest freshwater body in China and a significant congregation site for waterfowl; however, surrounding rice fields and poultry grazing have created an overlap with wild waterbir...
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