Abstract The Little Auk Alle alle is a small planktivorous auk breeding colonially in the High
Arctic. Owing to its large population size and bi-environmental lifestyle, resulting in the large …

It is often argued that anisogamy causes alternative reproductive tactics (ARTs) to be more
common in males than females. We challenge this view by pointing out logical flaws in the …

Highlights•Little auks are very colonial seabirds with strong partner and nest fidelity.•We
investigated identity coding in vocalizations of 29 known individuals.•Calls could be reliably …

Many seabird species breed in colonies counting up to hundreds of thousands of
individuals. Life in such crowded colonies might require special coding–decoding systems …

Individual recognition (IR) abilities may result from various ecological and naturally selected
features of a species. Complex IR mechanisms should develop when the risk of …

Source–filter theory posits that an individual's size and vocal tract length are reflected in the
parameters of their calls. In species that mate assortatively, this could result in vocal …

The Arctic experiences a rapid retreat of sea-ice, particularly in spring and summer, which
may dramatically affect pagophilic species. In recent years, the decline of many Arctic …

Foraging ecology of chick rearing seabirds is affected mainly by the food availability on
feeding grounds, but it can be also modulated by environmental conditions during the …

Studies on time allocation of various activities are crucial to understand which behavioural
strategy is the most profitable in a given context, and so why animals behave in a particular …

In species with biparental care, one parent may relieve him-/herself of the costs of parental
care by deserting and leaving the mate to care for the offspring. Offspring desertion by a …