Periodic movement of organisms between alternative habitats e.g. between areas for reproduction and one or more areas non-reproductive activity, or between areas of foraging and areas used for other activities. Most migrations occur at predictable intervals triggered by stimuli e.g. un-favourable conditions. NB: Movements that do not include an obligatory return journey are classified as dispersal (Baretta-Bekker et al., 1992).
|Non migratory / resident||Remaining within the same area (from Lincoln et al.,1998).|
|Diel||Daily, pertaining to a 24 hour period.|
|Seasonal (feeding)||A seasonal migration for the purpose of following or moving to suitable feeding grounds.|
|Seasonal (reproduction)||A seasonal migration in order to reproduce.|
|Seasonal (environment)||A seasonal migration in order to remain within suitable environmental conditions.|
|Ontogenetic migration||Different life stages migrate into different habitats, or part of habitat (e.g. copepods, Arenicola etc) (Lincoln et al., 1998).|