A broad range of metrics of movement are collected by ecologists and biologists. Common forms of measurement are tracking individuals using radio-telemetry, satellite tagging, or other methods, mark-release-recapture, mass mark-recapture, observations of colonization of habitat patches over some period of time, and indirect estimates from genetic data. Using genetic data requires making assumptions about effective population size and the equilibrium ofdynamics, and the neutrality ofgenetic markers. Rolf Ims and Nigel Yoccoz reviewed the different measures of measuring movement and discussed the advantages and disadvantages of different metric. The most accurate measures are those that are most labor intensive to collect and these will necessarily be spatially limited.
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