Survival rates of waterfowl during wing molt have rarely been described, leading to uncertainty about the importance of this annual cycle stage for management. We quantified survival probability of 247 radiomarked female harlequin ducks (Histrionicus histrionicus) during wing molt in Prince William Sound, Alaska, USA. The daily survival rate (DSR) was extremely high (DSR 1⁄4 0.999; 95% CI: 0.99...

Expression of cyclin E is believed to be a critical factor promoting cell entry into the S-phase and cell proliferation. Indeed, normal proliferating cells and most tumor cell lines are characterized by the existence of a minimal cyclin E threshold level in the G1-phase, and only those cells expressing cyclin E over this threshold enter into the S-phase of the cell cycle. However, through study...

Two commercial strains, Hy-Line W-36 and DeKalb XL, were moved to a laying house at 18 wk of age. They were housed 6 hens/layer cage at 2 densities (361 and 482 cm2/bird) with 2 replications each per strain/density combination. The high-density treatment contained 24 hens/replication and the low-density treatment contained 18 hens/replication for a total of 168 hens. Production parameters were ...

Expression of the proliferation-associated nucleolar antigen pi 20 was studied by flow cytometry in human quiescent and phytohemagglutininstimulated lymphocytes, as well as in human lymphocytic (MOLT-4) and promyelocytic (HL-60) cell lines. Divariate analysis of pl20 and DNA content made it possible to correlate p120 expression with cell position in the cycle. Proliferating lymphocytes and MOLT...

We quantified the duration and phenology of remigial molt of Barrow’s Goldeneyes (Bucephala islandica) in northwestern Alberta, Canada. We estimated that the remiges’ average (± SE) growth rate was 3.94 ± 0.13 mm day–1, slightly slower than that of most waterfowl. Barrow’s Goldeneyes regained flight with the ninth primary 77% grown, a percentage similar to or greater than that of most waterfowl...

Carotenoid-based plumage coloration plays a critical role for both inter- and intrasexual communication. Habitat and diet during molt can have important consequences for the development of the ornamental signals used in these contexts. When molt occurs away from the breeding grounds (e.g., pre-alternate molt on the wintering grounds, or stopover molt), discerning the influence of habitat and di...

From QSAR studies, a series of salicylaldehyde semicarbazones, HOC6H4CH=N-NHCONR2 (H2R2) and their Cu(II) complexes were synthesized, characterized and investigated for their biological activities previously. Results obtained showed that one of the most active compounds in this series is [Cu(HBnz2)Cl]. Thus, in this study, research was then carried out to investigate the anti-tumour property of...

Neither the cellular binding sites nor the extrahepatic reservoirs for the hepatitis C virus (HCV) are well understood. The study of Hamaia and colleagues (page 2293) investigates the characteristics of HCV binding to platelets and 2 mononuclear cell lines. Among the interesting findings of this study: (1) Most HCV (95%) circulates bound to IgG; only 1% of circulating virus is cell bound. (2) H...