Barcellos Leonardo J G, Woehl Viviane M, Koakoski Gessi, Oliveira Thiago A, Ferreira Daiane, da Rosa João Gabriel S, de Abreu Murilo S, Quevedo Rosmari Mezzalira, Fagundes Michele
Universidade de Passo Fundo (UPF), Programa de Pós-Graduação em Bioexperimentação, Campus I, Bairro São José, Caixa Postal 611, Passo Fundo, RS, Brazil.
Universidade Federal de Santa Catarina (UFSC), Centro de Ciências Biológicas, Departamento de Morfologia, Campus Universitário Reitor João David Ferreira Lima, Trindade, Florianópolis, SC, Brazil.
Physiol Behav. 2014 Apr 10;128:232-6. doi: 10.1016/j.physbeh.2014.02.023. Epub 2014 Feb 15.
We investigated a group of Rhamdia quelen females during their entire first reproductive cycle and beginning of the 2nd cycle by evaluating the stress response at different phases of gonadal maturation. In mammals, including humans, pubertal development modulates stress response reactivity due to the maturation of the neuroendocrine stress axis. These shifts in the stress reactivity were also detected in salmonid fishes. This effect comes from changes in the sensitivity of the stress axis glands or in the capacity of the adrenal tissue to synthesise glucocorticoids. Here, for the first time, we show that similar to mammals and salmonid fishes, pre-pubertal female R. quelen exhibit a protracted stress response compared to adult fish, pointing to puberty as a key event on HPI axis modulation.
