How many routes lead to migration? Comparison of methods to assess and characterize migratory movements (pages 54–68)
Francesca Cagnacci, Stefano Focardi, Anne Ghisla, Bram van Moorter, Evelyn H. Merrill, Eliezer Gurarie, Marco Heurich, Atle Mysterud, John Linnell, Manuela Panzacchi, Roel May, Torgeir Nygård, Christer Rolandsen and Mark Hebblewhite
Article first published online: 1 DEC 2015 | DOI: 10.1111/1365-2656.12449
The authors compared three methods to identify migration, drawn from existing definitions of migration and fitted into theoretical frameworks of movement. They consistently classified population as complete or partial migration, but not individual cases of migration. The authors argue that inconsistent classification by methods points to less-stereotyped behaviours in the residency-to-migratory continuum, and put forward the need for an ‘index of migratoriness’.