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Microplastics disrupt hermit crab shell selection

Crump, A, Mullens, C, Bethell, EJ, Cunningham, EM and Arnott, G (2020) Microplastics disrupt hermit crab shell selection. Biology Letters, 16 (4). ISSN 1744-9561

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Abstract

Microplastics (plastics < 5 mm) are a potential threat to marine biodiversity. However, the effects of microplastic pollution on animal behaviour and cognition are poorly understood. We used shell selection in common European hermit crabs (Pagurus bernhardus) as a model to test whether microplastic exposure impacts the essential survival behaviours of contacting, investigating and entering an optimal shell. We kept 64 female hermit crabs in tanks containing either polyethylene spheres (n = 35) or no plastic (n = 29) for 5 days. We then transferred subjects into suboptimal shells and placed them in an observation tank with an optimal alternative shell. Plastic-exposed hermit crabs showed impaired shell selection: they were less likely than controls to contact optimal shells or enter them. They also took longer to contact and enter the optimal shell. Plastic exposure did not affect time spent investigating the optimal shell. These results indicate that microplastics impair cognition (information-gathering and processing), disrupting an essential survival behaviour in hermit crabs.

Item Type: Article
Additional Information: Andrew Crump, Charlotte Mullens, Emily J. Bethell, Eoghan M. Cunningham and Gareth Arnott 2020Microplastics disrupt hermit crab shell selectionBiol. Lett.1620200030 http://doi.org/10.1098/rsbl.2020.0030
Uncontrolled Keywords: 06 Biological Sciences
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QL Zoology
Divisions: Biological & Environmental Sciences (new Sep 19)
Publisher: The Royal Society
Related URLs:
Date Deposited: 30 Apr 2020 10:05
Last Modified: 30 Apr 2020 10:15
DOI or Identification number: 10.1098/rsbl.2020.0030
URI: http://researchonline.ljmu.ac.uk/id/eprint/12855

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