| anticoagulant rodenticides in three owl species from western canada, 1988-2003. | anticoagulant rodenticides are widely used to control rodent infestations. previous studies have shown that nontarget organisms, such as birds, are at risk for both primary and secondary poisoning. this paper presents rodenticide residue information on the livers from 164 strigiformes which included barn owls (tyto alba), barred owls (strix varia), and great horned owls (bubo virginianus), collected from 1988 to 2003 in the province of british columbia and the yukon territory, canada. livers wer ... | 2010 | 19826750 |
| impact of high predation risk on genome-wide hippocampal gene expression in snowshoe hares. | the population dynamics of snowshoe hares (lepus americanus) are fundamental to the ecosystem dynamics of canada's boreal forest. during the 8- to 11-year population cycle, hare densities can fluctuate up to 40-fold. predators in this system (lynx, coyotes, great-horned owls) affect population numbers not only through direct mortality but also through sublethal effects. the chronic stress hypothesis posits that high predation risk during the decline severely stresses hares, leading to greater st ... | 2014 | 25234370 |