title: Chronic exposure to sub-lethal concentration of a glyphosate-based herbicide alters hormone profiles and affects reproduction of female Jundiá (Rhamdia quelen).
abstract: This work was carried out to verify the effect of a glyphosate-based herbicide on Jundiá hormones (cortisol, 17β-estradiol and testosterone), oocyte and swim-up fry production. Earthen ponds containing Jundiá females were contaminated with glyphosate (3.6mg/L); blood samples were collected from eight females from each treatment immediately before, or at 1, 10, 20, 30 and 40 days following contamination. A typical post-stress rise in cortisol levels was observed at the 20th and 40th days following exposure to glyphosate. At the 40th day, 17β-estradiol was decreased in the exposed females. A similar number of oocytes were stripped out from females from both groups; however, a lower number of viable swim-up fry were obtained from the herbicide exposed females, which also had a higher liver-somatic index (LSI). The results indicate that the presence of glyphosate in water was deleterious to Rhamdia quelen reproduction, altering steroid profiles and egg viability.
authors.affiliation: Centro de Aqüicultura da Universidade Estadual Paulista-CAUNESP, Jaboticabal, São Paulo, SP, Brazil.
authors.forename: Auren Benck
authors.initials: AB
authors.lastname: Soso
authors.forename: Leonardo José Gil
authors.initials: LJ
authors.lastname: Barcellos
authors.forename: Maria José
authors.initials: MJ
authors.lastname: Ranzani-Paiva
authors.forename: Luiz Carlos
authors.initials: LC
authors.lastname: Kreutz
authors.forename: Rosmari Mezzalira
authors.initials: RM
authors.lastname: Quevedo
authors.forename: Deniz
authors.initials: D
authors.lastname: Anziliero
authors.forename: Marina
authors.initials: M
authors.lastname: Lima
authors.forename: Leonardo Bolognesi da
authors.initials: LB
authors.lastname: Silva
authors.forename: Filipe
authors.initials: F
authors.lastname: Ritter
authors.forename: Alexandra Calliari
authors.initials: AC
authors.lastname: Bedin
authors.forename: Jovani Antônio
authors.initials: JA
authors.lastname: Finco