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Reproduction and life-cycle To initiate courting, some roosters may dance in a circle around or near a hen (a circle dance), often lowering the wing which is closest to the hen. [ 32 ] The dance triggers a response in the hen [ 32 ] and when she responds to his call, the rooster may mount the hen and proceed with the mating.
This species has a monoxenous life cycle with the only definitive host as chickens; it is extremely host-specific.Acquired via fecal contamination of food and water (oral-fecal route), it undergoes endogenous merogony in the crypts of Lieberkuhn (intestinal ceca of chicken) and gametogony in epithelial cells of the small intestines.
H. gallinarum has a direct lifecycle involving birds such as chickens, turkeys, ducks, geese, grouse, guineafowl, partridges, pheasants, and quails as definitive hosts. Eggs of H. gallinarum are passed in feces by the host. At optimal temperature (22 °C), they become infective in 12–14 days and remain infective for years in soil.
Eimeria. Eimeria is a genus of apicomplexan parasites that includes various species capable of causing the disease coccidiosis in animals such as cattle, poultry and smaller ruminants including sheep and goats. [2] Eimeria species are considered to be monoxenous because the life cycle is completed within a single host, and stenoxenous because ...
The moorhen is a distinctive species, with predominantly black and brown plumage, with the exception of a white under-tail, white streaks on the flanks, yellow legs and a red frontal shield. The bill is red with a yellow tip. The young are browner and lack the red shield. The frontal shield of the adult has a rounded top and fairly parallel ...
Beyer, 1900. The chicken turtle (Deirochelys reticularia) is a turtle native to the southeastern United States. It is the only extant member of the genus Deirochelys and is a member of the freshwater marsh turtle family Emydidae. The chicken turtle's scientific name refers to its extremely long neck and distinctive net-like pattern on its upper ...
The greater prairie-chicken was almost extinct in the 1930s due to hunting pressure and habitat loss. In Illinois alone, in the 1800s, the prairie-chicken numbered in the millions. It was a popular game bird, and like many prairie birds, which have also suffered massive habitat loss, it is now on the verge of extinction, with the wild bird ...
The chicken embryo is a unique model that overcomes many limitations to studying the biology of cancer in vivo. The chorioallantoic membrane (CAM), a well-vascularized extra-embryonic tissue located underneath the eggshell, has a successful history as a biological platform for the molecular analysis of cancer including viral oncogenesis, [8] carcinogenesis, [9] tumor xenografting, [1] [10] [11 ...