Increased rates of dispersal of free-ranging cane toads (Rhinella marina) during their global invasion.

Autor: Shine R; Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia. rick.shine@mq.edu.au., Alford RA; College of Science and Engineering, James Cook University, Townsville, QLD, 4811, Australia., Blennerhasset R; Rollins College, Winter Park, Florida, 32789, USA., Brown GP; Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia., DeVore JL; School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia., Ducatez S; UMR 241 EIO (UPF, IRD, IFREMER, ILM), Institut de Recherche Pour le Développement (IRD), Papeete, Tahiti, French Polynesia., Finnerty P; School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia., Greenlees M; Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia., Kaiser SW; Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia., McCann S; School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia., Pettit L; School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia., Pizzatto L; School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia.; School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW, 2308, Australia., Schwarzkopf L; College of Science and Engineering, James Cook University, Townsville, QLD, 4811, Australia., Ward-Fear G; Department of Biological Sciences, Macquarie University, Sydney, NSW, 2109, Australia., Phillips BL; School of BioSciences, University of Melbourne, Parkville, VIC, 3010, Australia.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2021 Dec 07; Vol. 11 (1), pp. 23574. Date of Electronic Publication: 2021 Dec 07.
DOI: 10.1038/s41598-021-02828-5
Abstrakt: Invasions 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.
(© 2021. The Author(s).)
Databáze: MEDLINE
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