For illustrative purposes, in this article we use “Johansen Plots” as a graphical way of simultaneously visualizing the inter-connected variables that compose convective steps gas transport cascade. These plots are used to reflect on some physiological characteristics seen five species birds, four which sojourn to, or native high altitudes (the barnacle goose, bar-headed Andean speckled teal an...

BACKGROUND Waterfowl parvoviruses cause serious loss in geese and ducks production. Goose parvovirus (GPV) is infectious for geese and ducks while Muscovy duck parvovirus (MDPV) infects Muscovy ducks only. So far, for these viruses' sensitive detection polymerase chain reaction (PCR) and loop-mediated isothermal amplification (LAMP) were applied. However, there was no molecular biology method f...

Sarcocystis-infected muscles from ducks, cowbirds, and grackles were fed to cats, opossums, rats, and a dog. Only the opossum (Didelphis virginiana) was a suitable definitive host. All opossums that were fed Sarcocystis-infected cowbirds (Molothrus ater) and grackles (Cassidix mexicanus and Quiscalus quiscula) passed sporocysts in their feces. Opossums that ate the cowbirds had prepatent period...

The maternally inherited mitochondrial DNA (mtDNA) D-loop region is widely used for exploring genetic relationships and for investigating the origin of various animal species. Currently, domestic ducks play an important role in animal protein supply. In this study, partial mtDNA D-loop sequences were obtained from 145 samples belonging to six South-East Asian duck populations and commercial duc...

The 667 bp control region of mitochondrial DNA from 8 representative domestic duck breeds in China, which were all native preserved duck breeds, and a mallard (6 Anas zonorhyncha individuals) were sequenced. The genetic polymorphism and the origin of the 8 domestic ducks were analysed. The result showed that the haplotype diversity (Hd) and average nucleotide diversity (Pi) were 0.67136 and 0.1...

Identification of the agent: The virus may be isolated from the liver, spleen and kidneys of birds dying from this infection. Virus may be recovered by infecting susceptible ducklings, in which the disease can be reproduced; by inoculating embryonated Muscovy duck eggs on the chorioallantoic membrane; or by inoculating cell cultures of duck embryo or Muscovy duck embryo origin. The identity of ...

Egg yolk phospholipids from seven different species were purified (purity > 96%) using SPE columns, and subsequently the phospholipid profiles identified quantified by ultra-high-performance liquid chromatography-electrospray ionization-triple time-of flight mass spectrometry (UHPLC-ESI-Triple TOF-MS). Eight classes 87 molecular characterized. Principal component analysis showed that concentrat...