haemoproteus greineri in wood ducks from the atlantic flyway.thin smears of blood were examined from 157 wood ducks (aix sponsa) trapped at savannah national wildlife refuge (south carolina, usa) and harris neck national wildlife refuge (georgia, usa) during spring and summer, 1994 and 1995. thirteen wood ducks (8%) were infected with blood parasites. eleven of these birds were infected with haemoproteus nettionis, seven with leucocytozoon simondi, and five with unidentified microfilariae. additionally, eight wood ducks (5%) were infected with haemoproteu ...19979131576
seasonal patterns of lh, testosterone and semen quality in the northern pintail duck (anas acuta).this study characterized seasonal changes in circulating lh and testosterone and in semen production and quality in the northern pintail duck. plasma lh and testosterone were measured in blood samples collected weekly throughout the year from eight males exposed to natural fluctuations in day length and temperature. semen quality was evaluated weekly in these same males from april-june, the months when spermatozoa were produced. semen quality (based on sperm concentration and normal morphology) ...200011302434
canada geese and the epidemiology of avian influenza viruses.canada geese (branta canadensis) are numerous, highly visible, and widely distributed in both migratory and resident populations in north america; as a member of the order anseriformes, they are often suggested as a potential reservoir and source for avian influenza (ai) viruses. to further examine the role of canada geese in the ecology of ai, we re-evaluated existing literature related to ai virus in this species and tested breeding populations of canada geese from three states (georgia, west ...201020688710
organochlorine and heavy metal residues in black duck eggs from the atlantic flyway, duck (anas rubripes) eggs were collected during 1978 in the atlantic flyway. one egg from each of 49 clutches was analyzed for organochlorine compounds and mercury. dde was detected in 39 eggs, ranging from 0.09 ppm to 3.4 ppm, wet weight. dde residues were highest in eggs from delaware, where the mean dde level was 2.0 ppm. ddt and tde were present at low levels in only five and four eggs, respectively. pcbs resembling aroclor 1260 were detected in 24 eggs and ranged from 0.43 ppm to 2.9 ...19807232104
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