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• W4288760250 endingPage "114034" @default.
• W4288760250 startingPage "114034" @default.
• W4288760250 abstract "The open field is a suitable task to analyze the sequential organization of exploratory activity and the homebase formation represents an important feature of environmental recognition. Although the zebrafish can define homebase locations, there are no data reporting how stressful conditions modulate complex behaviors of this aquatic species in the open field so far. Here, we aimed to characterize the spatio-temporal exploratory activity of adult zebrafish in the open field test, as well as to verify the responsiveness of homebase-related parameters to acute stress (AS) and unpredictable chronic stress (UCS) protocols. Animals were exposed to conspecific alarm substance for 5 min or subjected to a 7-days stress protocol using distinct stressors in an unpredictable manner. Immediately after exposure to AS or 24 h after UCS, fish were individually placed in a circular tank and their behaviors were recorded for 30 min to identify the respective homebase for each animal. We observed that UCS, but not AS, increased thigmotaxis compared to the non-stressed fish. Notably, the sequential organization of exploratory activity showed robust differences depending on the stress protocol. After the first 15 min of trial, AS-challenged fish apparently used the homebase to organize briefly explorations to the environment. Conversely, the UCS group was more immobile in the homebase after periodically performing 'swimming bursts' to the periphery with a greater number of stops per trip. Physiological stress responses were confirmed by the increased whole-body cortisol in both AS and UCS groups. In conclusion, our novel findings report a different exploratory profile related to stress responses in adult zebrafish tested in the open field, supporting the sensitivity of homebase-related parameters to manipulations that modulate affective-like states." @default.
• W4288760250 created "2022-07-30" @default.
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• W4288760250 date "2022-10-01" @default.
• W4288760250 modified "2023-10-17" @default.
• W4288760250 title "Influence of acute and unpredictable chronic stress on spatio-temporal dynamics of exploratory activity in zebrafish with emphasis on homebase-related behaviors" @default.
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• W4288760250 doi "https://doi.org/10.1016/j.bbr.2022.114034" @default.
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