Author:
Shine Richard,Alford Ross A.,Blennerhasset Ryan,Brown Gregory P.,DeVore Jayna L.,Ducatez Simon,Finnerty Patrick,Greenlees Matthew,Kaiser Shannon W.,McCann Samantha,Pettit Lachlan,Pizzatto Ligia,Schwarzkopf Lin,Ward-Fear Georgia,Phillips Benjamin L.
Abstract
AbstractInvasions often accelerate through time, as dispersal-enhancing traits accumulate at the expanding range edge. How does the dispersal behaviour of individual organisms shift to increase rates of population spread? We collate data from 44 radio-tracking studies (in total, of 650 animals) of cane toads (Rhinella marina) to quantify distances moved per day, and the frequency of displacement in their native range (French Guiana) and two invaded areas (Hawai’i and Australia). We show that toads in their native-range, Hawai’i and eastern Australia are relatively sedentary, while toads dispersing across tropical Australia increased their daily distances travelled from 20 to 200 m per day. That increase reflects an increasing propensity to change diurnal retreat sites every day, as well as to move further during each nocturnal displacement. Daily changes in retreat site evolved earlier than did changes in distances moved per night, indicating a breakdown in philopatry before other movement behaviours were optimised to maximise dispersal.
Funder
Australian Research Council
Publisher
Springer Science and Business Media LLC
Cited by
16 articles.
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