title: My stress, our stress: blunted cortisol response to stress in isolated housed zebrafish.
abstract: Here, we show that individually housed zebrafish presented a reduced cortisol response to an acute stressor (persecution with a pen net for 120 s) compared to zebrafish housed in groups of 10. We hypothesized that the cortisol response to stress was reduced in individually housed zebrafish because they depend solely on their own perceptions of the stressor, whereas among grouped zebrafish, the stress response might be augmented by chemical and/or behavioral cues from the other members of the shoal. This hypothesis was based on previous described chemical communication of stress in fish as well on individual variation in stressor perception and potential individual differences in fish personality.
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil; Universidade de Passo Fundo (UPF), Passo Fundo, RS, Brazil. Electronic address: anacvg@upf.br.
authors.forename: Ana Cristina Vendrametto Varrone
authors.initials: AC
authors.lastname: Giacomini
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Electronic address: abreu_murilo@hotmail.com.
authors.forename: Murilo Sander
authors.initials: MS
authors.lastname: de Abreu
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Electronic address: gessikoakoski@gmail.com.
authors.forename: Gessi
authors.initials: G
authors.lastname: Koakoski
authors.affiliation: Programa de Pós-Graduação em Bioexperimentação, Universidade de Passo Fundo (UPF), Passo Fundo, RS, Brazil.
authors.forename: Renan
authors.initials: R
authors.lastname: Idalêncio
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Electronic address: fabikalichak@hotmail.com.
authors.forename: Fabiana
authors.initials: F
authors.lastname: Kalichak
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Electronic address: thiago_a.oliveira@hotmail.com.
authors.forename: Thiago Acosta
authors.initials: TA
authors.lastname: Oliveira
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Electronic address: joaogabriel.sr@hotmail.com.
authors.forename: João Gabriel Santos
authors.initials: JG
authors.lastname: da Rosa
authors.affiliation: Universidade de Passo Fundo (UPF), Passo Fundo, RS, Brazil. Electronic address: guss.d@hotmail.com.
authors.forename: Darlan
authors.initials: D
authors.lastname: Gusso
authors.affiliation: Departamento de Farmacologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. Electronic address: angelopiato@gmail.com.
authors.forename: Angelo Luis
authors.initials: AL
authors.lastname: Piato
authors.affiliation: Programa de Pós-Graduação em Farmacologia, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil; Programa de Pós-Graduação em Bioexperimentação, Universidade de Passo Fundo (UPF), Passo Fundo, RS, Brazil. Electronic address: lbarcellos@upf.br.
authors.forename: Leonardo José Gil
authors.initials: LJ
authors.lastname: Barcellos
mesh_terms: D000818:Animals; D005260:Female; D006799:Housing, Animal; D006854:Hydrocortisone / Q000378:metabolism*; D008297:Male; D010465:Perception; D012919:Social Behavior; D012934:Social Isolation / Q000523:psychology; D013315:Stress, Psychological / Q000503:physiopathology*; D015027:Zebrafish / Q000502:physiology*
chemical_list: D006854:Hydrocortisone
keywords: Cortisol; HPI axis modulation; Shoaling behavior; Stress