Terrestrial emigration behaviour of two invasive crayfish species

Thomas, John Rhidian, Masefield, Stephanie, Hunt, Rhiannon, Wood, Matthew J ORCID: 0000-0003-0920-8396, Hart, Adam G ORCID: 0000-0002-4795-9986, Hallam, Jane, Griffiths, Siân W. and Cable, Jo (2019) Terrestrial emigration behaviour of two invasive crayfish species. Behavioural Processes. p. 103917. ISSN 0376-6357 (In Press)

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Abstract

To disperse between isolated waterbodies, freshwater organisms must often cross terrestrial barriers and many freshwater animals that are incapable of flight must rely on transport via flooding events, other animals or anthropogenic activity. Decapods such as crayfish, on the other hand, can disperse to nearby waterbodies by walking on land, a behaviour that has facilitated the spread of invasive species. Overland movement could play a key role in the management of non-native crayfish, though to what extent terrestrial emigration occurs in different species is poorly understood. Here, we directly compared the terrestrial emigration tendency of two non-native crayfish species in Great Britain; red swamp (Procambarus clarkii) and signal (Pacifastacus leniusculus) crayfish. We found that both species emigrated from the water and that there was no significant difference in terms of their terrestrial emigration tendency, suggesting that there is a risk both of these species will migrate overland and disperse to new habitats. This study shows that terrestrial emigration is an important behavioural trait to consider when preventing the escape of crayfish from aquaculture and further spread of invasive species.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Emigration; Invasive species; Pacifastacus leniusculus; Procambarus clarkii; Overland movement
Subjects: Q Science > QH Natural history
Divisions: Schools and Research Institutes > School of Natural & Social Sciences > Environmental Sciences
Research Priority Areas: Environmental Dynamics & Governance
Depositing User: Anne Pengelly
Date Deposited: 26 Jul 2019 14:11
Last Modified: 13 Aug 2019 09:16
URI: http://eprints.glos.ac.uk/id/eprint/7064

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