Bird nest selection in forests can be influenced by the composition of key structural elements and resources. This has important consequences terms species population dynamics since it determine reproduction success. Here, we assessed Common raven nest-site reproductive success, how these might determined foraging behavior habitat structure. A previously documented breeding that exerts high pre...

Kirby (1994) has helpfully applied the terminology of signal detection theory to Watson's selection task. We agree with him that it is necessary to bring out the decision theoretic aspects of the selection task (Evans, Over & Manktelow, 1993), and Kirby makes an important contribution by doing this so fully for an abstract version of the task. However, there are problems with both the design of...

differentiate significant and trivial chemical hazards and to assess likely risks to humans. This latter justification can be illustrated by the following statement: if all chemicals that are mutagenic in vitro were mutagenic and carcinogenic to humans, and if all rodent carcinogens posed an equal carcinogenic hazard to humans, then there would be no role for mechanistic studies. The fact that ...

Citation: Georgiev H, Ravens I, Papadogianni G, Halle S, Malissen B, Loots GG, Förster R and Bernhardt G (2018) Shared and Unique Features Distinguishing Follicular T Helper and Regulatory Cells of Peripheral Lymph Node and Peyer’s Patches. Front. Immunol. 9:714. doi: 10.3389/fimmu.2018.00714 shared and Unique Features Distinguishing Follicular T helper and regulatory cells of Peripheral lymph ...

In many songbirds, the space use of breeders is well studied but poorly understood for non-breeders. In common ravens, some studies of non-breeders indicate high vagrancy with large individual differences in home range size, whereas others show that up to 40% of marked non-breeders can be regularly observed at the same anthropogenic food source over months to years. The aim of this study was to...

http://dx.doi.org/10.1016/j.anbehav.2016.11.018 0003-3472/© 2016 Published by Elsevier Ltd on beha In recent years, there has been considerable research effort to determine whether other species exhibit prosocial motivations parallel to those of humans; however, these studies have focused primarily on primates, and with mixed results. We presented captive ravens with a modified prosocial choice...

The utility of the VecTest antigen-capture assay to detect West Nile virus (WNV) in field-collected dead corvids was evaluated in Manitoba and Ontario, Canada, in 2001 and 2002. Swabs were taken from the oropharynx, cloaca, or both of 109 American Crows, 31 Blue Jays, 6 Common Ravens, and 4 Black-billed Magpies from Manitoba, and 255 American Crows and 28 Blue Jays from Ontario. The sensitivity...