OLDENDORF, Germany, Nov. 9 -- Endangered Species Research, a peer-reviewed journal that says it covers endangered life, the threats faced by species and their habitats and the steps that must be taken to ensure conservation, published research articles on the following topics in its Vol. 49, No. 1 edition:

* Annual, seasonal, and diel patterns in blue whale call occurrence off eastern Canada

* Classifying the effects of human disturbance on denning polar bears