title: Time place learning and activity profile under constant light and constant dark in zebrafish (Danio rerio).
abstract: The ability to learn about the signs of variability in space and time is known as time place learning (TPL). To adjust their circadian rhythms, animals use stimuli that change regularly, such as the light-dark cycle, temperature, food availability or even social stimuli. Because light-dark cycle is the most important environmental temporal cue, we asked how a diurnal animal would perform TPL if this cue was removed. Zebrafish has been extensively studied in the chronobiology area due to it diurnal chronotype, thus, we studied the effects of constant light and constant dark on the time-place learning and activity profile in zebrafish. Our data show that while under constant light and dark condition zebrafish was not able of TPL, after 30days under the constant conditions, constant light led to higher activity level and less significant (robust) 24h rhythm.
authors.affiliation: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Clarissa de Almeida
authors.initials: CA
authors.lastname: Moura
authors.affiliation: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Jéssica Polyana da Silva
authors.initials: JPDS
authors.lastname: Lima
authors.affiliation: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Vanessa Augusta Magalhães
authors.initials: VAM
authors.lastname: Silveira
authors.affiliation: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
authors.forename: Mário André Leocadio
authors.initials: MAL
authors.lastname: Miguel
authors.affiliation: Departamento de Fisiologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil. Electronic address: analuchiari@yahoo.com.br.
authors.forename: Ana Carolina
authors.initials: AC
authors.lastname: Luchiari
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D007858:Learning; D008027:Light; D009043:Motor Activity; D017440:Photoperiod; D013028:Space Perception; D013998:Time Perception; D015027:Zebrafish
keywords: Chronotype; Circadian rythym; Constant dark; Constant light; Time-place learning