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Personality, density and habitat drive the dispersal of invasive crayfish

Galib, S.M.; Sun, J.; Twiss, S.D.; Lucas, M.C.

Personality, density and habitat drive the dispersal of invasive crayfish Thumbnail


Authors

S.M. Galib

J. Sun



Abstract

There is increasing evidence that personality traits may drive dispersal patterns of animals, including invasive species. We investigated, using the widespread signal crayfish Pacifastacus leniusculus as a model invasive species, whether effects of personality traits on dispersal were independent of, or affected by, other factors including population density, habitat, crayfish size, sex and limb loss, along an invasion gradient. Behavioural traits (boldness, activity, exploration, willingness to climb) of 310 individually marked signal crayfish were measured at fully-established, newly-established and invasion front sites of two upland streams. After a period at liberty, recaptured crayfish were reassessed for behavioural traits (newly-established, invasion front). Dispersal distance and direction of crayfish movement, local population density, fine-scale habitat characteristics and crayfish size, sex and limb loss were also measured. Individual crayfish exhibited consistency in behavioural traits over time which formed a behavioural syndrome. Dispersal was both positively and negatively affected by personality traits, positively by local population density and negatively by refuge availability. No effect of size, sex and limb loss was recorded. Personality played a role in promoting dispersal but population density and local habitat complexity were also important determinants. Predicting biological invasion in animals is likely to require better integration of these processes.

Citation

Galib, S., Sun, J., Twiss, S., & Lucas, M. (2022). Personality, density and habitat drive the dispersal of invasive crayfish. Scientific Reports, 12, Article 1114. https://doi.org/10.1038/s41598-021-04228-1

Journal Article Type Article
Acceptance Date Dec 17, 2021
Online Publication Date Jan 21, 2022
Publication Date 2022
Deposit Date Jan 21, 2022
Publicly Available Date Jan 21, 2022
Journal Scientific Reports
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 12
Article Number 1114
DOI https://doi.org/10.1038/s41598-021-04228-1

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.





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