| trace elements in the feathers of waterfowl from nanhaizi wetland, baotou, china. | the trace element concentrations (cr, ni, pb, hg, cu, zn, mn, and fe) of feathers from ferruginous duck (aythya nyroca), gadwall (anas strepera), and green-winged teal (anas crecca) from nanhaizi wetland, china were measured. (1) there were significant differences in the concentrations of the cr, ni, and pb among the waterfowl species. the concentrations of cr and ni in gadwall feathers and pb in green-winged teal feathers were higher than the concentrations of cr, ni and pb in ferruginous duck. ... | 2019 | 30918995 |
| selected hematologic and plasma biochemistry analysis of ferruginous ducks (aythya nyroca) in israel. | the ferruginous duck (aythya nyroca) is a medium-sized chestnut-colored diving duck that inhabits wetlands of europe and asia. in recent years, this species has been declining throughout much of europe--a decline that is attributed mainly to destruction of natural habitats, and to hunting and pollution. the ferruginous duck is listed as "near threatened" by the international union for conservation of nature, and as a critically endangered nesting species in israel. in 2009, a captive-breeding/re ... | 2016 | 27010302 |
| [distribution of cestodes among domestic ducks and free-living aquatic birds]. | in 1959-1975, 3404 water birds of 18 species belonging to six orders were examined for the presence of cestodes. the birds came from 52 localities (ponds) in bohemia and moravia where domestic ducks were kept by the state fishery and where also wild water fowl occurred. cestodes of 31 species of the families hymenolepididae, dilepididae, amabiliidae and diploposthidae were found. the total number of examined birds included 2476 domestic ducks (1406 of them, i. e. 56.8%, were positive for cestode ... | 1983 | 6407178 |