Theory 63/Population/Migration
Migration Depends on Season Length
The claim
Whether a species migrates is set by the ratio of season length to travel time, so long journeys are only worth it where the season is long.
01Mechanism
Migration pays only if the time at the destination exceeds the time lost travelling and the risk incurred.
02Prediction
Migration should track the ratio.
03Refutation
Migration tracking resource difference would remove travel time.