M. P. Heide-Jorgensen

Strange attractor of a narwhal (Monodon monoceros)

The paper uses chaos theory to analyze narwhal diving behavior, identifying diurnal patterns and seasonal changes in diving depth and activity.

Sex and size matter: foraging ecology of offshore harbour porpoises in waters around Greenland

The paper examines sex and size differences in the foraging ecology of harbour porpoises using stable isotope analysis, finding females have higher trophic levels and larger ecological niches.

Combining δ13C and δ15N from bone and dentine in marine mammal palaeoecological research: insights from toothed whales

The paper provides correction factors to align δ13C and δ15N values from bone and dentine collagen in narwhals and belugas for paleoecological analysis.

Abundance estimation from genetic mark-recapture data when not all sites are sampled: an example with the bowhead whale

The paper develops a method to estimate population abundance using genetic mark-recapture data when not all sites are sampled, applying it to estimate the bowhead whale population size.

Strong and lasting impacts of past global warming on baleen whale and prey abundance

The paper assesses the demographic changes of baleen whales and their prey over 30,000 years, showing strong correlations with past global warming and oceanographic changes.

Abundance of whales in West and East Greenland in summer 2015

The paper estimates whale abundance in West and East Greenland in 2015, finding higher densities in East Greenland and a decline in baleen whales and white-beaked dolphins compared to 2007.

Understanding narwhal diving behaviour using Hidden Markov Models with dependent state distributions and long range dependence

This paper uses Hidden Markov Models to analyze narwhal diving behavior, finding that narwhals spend two-thirds of their time feeding during deep dives and can have up to three days without feeding.