Infection with an acanthocephalan helminth reduces anxiety-like behaviour in crustacean host. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2022

Infection with an acanthocephalan helminth reduces anxiety-like behaviour in crustacean host.

(1) , (1)
1

Résumé

Trophically transmitted heteroxenous parasites of diverse clades can decrease or reverse antipredator behaviours in their intermediate hosts, thereby increasing their chances of reaching their final hosts. Such behavioural alterations could result from compromised cognitive abilities affecting fear- or more generally stress-related neurophysiological pathways. We tested this hypothesis in a key model system in the study of parasitic manipulation, the fish acanthocephalan parasite Pomphorhynchus tereticollis and its intermediate crustacean host Gammarus fossarum, using the ‘threat of electric shock’ paradigm. We exposed uninfected and infected G. fossarum to chronic and/or acute electric shock programs at two different intensities (voltage), and then quantified their sheltering behaviour as a proxy for anxiety-like state. Infected gammarids did not express anxiety-like response to electric shocks, while uninfected gammarids hid more when exposed to acute treatments, and when exposed to the high intensity chronic treatment. Interestingly, the lack of response in infected gammarids depended on parasite developmental stage. Our results support the hypothesis that this acanthocephalan parasite impacts the general anxiety-like circuitry of their intermediate host. Further studies are needed to investigate whether it involves inappropriate processing of information, impaired integration, or altered activation of downstream pathways initiating behavioural action.

Dates et versions

hal-03911943 , version 1 (23-12-2022)

Identifiants

Citer

Camille-Sophie Cozzarolo, Marie-Jeanne Perrot-Minnot. Infection with an acanthocephalan helminth reduces anxiety-like behaviour in crustacean host.. Scientific Reports, 2022, 12 (1), pp.21649. ⟨10.1038/s41598-022-25484-9⟩. ⟨hal-03911943⟩
0 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More