Sympatrically breeding congeneric seabirds ( spp.) from Arctic Canada migrate to four oceans.

Polar systems of avian migration remain unpredictable. For seabirds nesting in the Nearctic, it is often difficult to predict which of the world's oceans birds will migrate to after breeding. Here, we report on three related seabird species that migrated across four oceans following sympatric breeding at a central Canadian high Arctic nesting location.

The mitogenome of freshwater loach (Teleostei: Nemacheilidae) with phylogenetic analysis of Nemacheilidae.

The complete mitogenome can provide valuable genetic information to reconstruct relationships between species. In this study, we sequenced a stone loach, (Teleostei: Nemacheilidae), which is found in the northern region of the Qinling Mountains in China. The size of the mitogenome is 16,570 bp, which contains 37 typical mitochondrial genes including 13 protein-coding genes, 22 transfer RNAs, two ribosomal RNAs, and a control region (D-loop) with a total AT content of 55.

Stable isotopes can be used to infer the overwintering locations of prebreeding marine birds in the Canadian Arctic.

Although assessments of winter carryover effects on fitness-related breeding parameters are vital for determining the links between environmental variation and fitness, direct methods of determining overwintering distributions (e.g., electronic tracking) can be expensive, limiting the number of individuals studied.

Honey bee-collected pollen in agro-ecosystems reveals diet diversity, diet quality, and pesticide exposure.

European honey bees are important commercial pollinators that have suffered greater than normal overwintering losses since 2007 in North America and Europe. Contributing factors likely include a combination of parasites, pesticides, and poor nutrition. We examined diet diversity, diet nutritional quality, and pesticides in honey bee-collected pollen from commercial colonies in the Canadian Maritime Provinces in spring and summer 2011.

Population structure of Purple Sandpipers () as revealed by mitochondrial DNA and microsatellites.

The Purple Sandpiper () is a medium-sized shorebird that breeds in the Arctic and winters along northern Atlantic coastlines. Migration routes and affiliations between breeding grounds and wintering grounds are incompletely understood. Some populations appear to be declining, and future management policies for this species will benefit from understanding their migration patterns.