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Lack of sex-specific movement patterns in an alien species at its invasion front - consequences for invasion speed

Herfindal, Ivar and Melis, Claudia and Åhlén, Per-Arne and Dahl, Fredrik (2016). Lack of sex-specific movement patterns in an alien species at its invasion front - consequences for invasion speed. Ecology and evolution. 6:16, 5570-5584
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Official URL: http://dx.doi.org/10.1002/ece3.2300

Abstract

Efficient targeting of actions to reduce the spread of invasive alien species relies on understanding the spatial, temporal, and individual variation of movement, in particular related to dispersal. Such patterns may differ between individuals at the invasion front compared to individuals in established and dense populations due to differences in environmental and ecological conditions such as abundance of conspecifics or sex-specific dispersal affecting the encounter rate of potential mates. We assessed seasonal and diurnal variation in movement pattern (step length and turning angle) of adult male and female raccoon dog at their invasion front in northern Sweden using data from Global Positioning System (GPS)-marked adult individuals and assessed whether male and female raccoon dog differed in their movement behavior. There were few consistent sex differences in movement. The rate of dispersal was rather similar over the months, suggesting that both male and female raccoon dog disperse during most of the year, but with higher speed during spring and summer. There were diurnal movement patterns in both sexes with more directional and faster movement during the dark hours. However, the short summer nights may limit such movement patterns, and long-distance displacement was best explained by fine-scale movement patterns from 18:00 to 05:00, rather than by movement patterns only from twilight and night. Simulation of dispersing raccoon dogs suggested a higher frequency of male-female encounters that were further away from the source population for the empirical data compared to a scenario with sex differences in movement pattern. The lack of sex differences in movement pattern at the invasion front results in an increased likelihood for reproductive events far from the source population. Animals outside the source population should be considered potential reproducing individuals, and a high effort to capture such individuals is needed throughout the year to prevent further spread.

Authors/Creators:Herfindal, Ivar and Melis, Claudia and Åhlén, Per-Arne and Dahl, Fredrik
Title:Lack of sex-specific movement patterns in an alien species at its invasion front - consequences for invasion speed
Series/Journal:Ecology and evolution (2045-7758)
Year of publishing :2016
Volume:6
Number:16
Page range:5570-5584
Number of Pages:15
Publisher:Wiley & Sons Ltd.
ISSN:2045-7758
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Dispersal, invasive species, movement ecology, Nyctereutes procyonoides, raccoon dog
URN:NBN:urn:nbn:se:slu:epsilon-e-3906
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3906
Additional ID:
Type of IDID
Web of Science (WoS)000381578400002
DOIUNSPECIFIED
ID Code:13997
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:26 Jan 2017 07:10
Metadata Last Modified:26 Jan 2017 07:10

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