Density-dependent behavioural interactions influence coexistence between a native and a non-native mesopredator

Show simple item record Jakubaviciute, Egle Candolin, Ulrika 2021-10-18T05:30:01Z 2021-10-18T05:30:01Z 2021-11
dc.identifier.citation Jakubaviciute , E & Candolin , U 2021 , ' Density-dependent behavioural interactions influence coexistence between a native and a non-native mesopredator ' , Biological Invasions , vol. 23 , pp. 3427-3434 .
dc.identifier.other PURE: 161430798
dc.identifier.other PURE UUID: f6f35363-5c7a-447b-b598-7ecd19840152
dc.identifier.other WOS: 000665766400001
dc.identifier.other ORCID: /0000-0001-8736-7793/work/101663218
dc.description.abstract The invasion of non-native species into an ecosystem can markedly alter the structure and functioning of the system. Yet, we have limited knowledge of the factors that determine invasion success. Behavioural interactions have been suggested as critical determinants of invasion success in animals, but the exact mechanisms are less well known. We investigated if density-dependent behavioural interactions could have facilitated the invasion of the shrimp Palaemon elegans into the spawning habitat of the threespine stickleback Gasterosteus aculeatus in the Baltic Sea. This was done by manipulating the densities of the two species in mesocosms. We found the stickleback to dominate behaviourally over the shrimp through higher aggression, but that the impact on the shrimp was density-dependent; a high density of sticklebacks increased aggressive interactions, which caused the shrimps to decrease their activity and restrict their habitat use to dense vegetation, while a low density of sticklebacks had no impact on the distribution and activity of the shrimps. The density of the shrimps had no impact on stickleback behaviour. These results suggest that the present density of the stickleback has allowed the invasion of the shrimp into the habitat. However, a current increase in stickleback abundance caused by human-induced ecological disturbances could limit the further expansion of the shrimp. Thus, our results indicate that a behavioural mechanism-density-dependent aggression-can influence invasion success and subsequent population expansion. At a broader level, our results stress the importance of considering density-dependent behavioural interactions when investigating the mechanisms behind invasion success. en
dc.format.extent 8
dc.language.iso eng
dc.relation.ispartof Biological Invasions
dc.rights cc_by
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject Aggression
dc.subject DECAPODA
dc.subject Density dependence
dc.subject FRAMEWORK
dc.subject Foraging
dc.subject Habitat use
dc.subject IMPACTS
dc.subject Invasion
dc.subject Nonindigenous species
dc.subject POPULATIONS
dc.subject PRAWNS
dc.subject 1181 Ecology, evolutionary biology
dc.title Density-dependent behavioural interactions influence coexistence between a native and a non-native mesopredator en
dc.type Article
dc.contributor.organization Organismal and Evolutionary Biology Research Programme
dc.contributor.organization Biosciences
dc.contributor.organization Behavioural Ecology - Candolin Research Lab
dc.description.reviewstatus Peer reviewed
dc.relation.issn 1387-3547
dc.rights.accesslevel openAccess
dc.type.version publishedVersion

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