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- Author:
- Somoza, Gustavo Manuel, et al. ; Scaia, María Florencia; Morandini, Leonel; Noguera, CristobalAlejandro; Trudeau, Vance L.; Pandolfi, Matías; Show all 6 Authors
- Source:
- Physiology & behavior 2018 v.194 pp. 481-490
- ISSN:
- 0031-9384
- Subject:
- Cichlasoma dimerus; aggression; aromatization; estrogens; females; males; physiological regulation; testosterone
- Abstract:
- ... Territorial aggression has been widely studied in males and it has been historically suggested that androgens are key mediators of this behavior. However, more recent evidence suggests that it is the aromatization to estrogens, rather than androgens themselves, that is key to regulating this behavior. Females also display aggressive behaviors, but the physiological regulation of female aggression ...
- DOI:
- 10.1016/j.physbeh.2018.06.028
-
https://dx.doi.org/10.1016/j.physbeh.2018.06.028
- Author:
- Somoza, Gustavo Manuel, et al. ; Scaia, María Florencia; Morandini, Leonel; Noguera, Cristobal Alejandro; Ramallo, Martín Roberto; Pandolfi, Matías; Show all 6 Authors
- Source:
- Behavioural processes 2018 v.147 pp. 61-69
- ISSN:
- 0376-6357
- Subject:
- Cichlasoma dimerus; aggression; conflict management; females; fish; males; motivation
- Abstract:
- ... Aggression is an extremely complex behaviour and female aggression is understudied when compared to males. Despite the fact that it has been suggested that conflict among females may be more frequently resolved peacefully, in many species females show high levels of aggression. We used Cichlasoma dimerus to describe dynamics and conflict outcome in intrasexual agonistic encounters. We performed en ...
- DOI:
- 10.1016/j.beproc.2017.12.015
-
https://dx.doi.org/10.1016/j.beproc.2017.12.015
- Author:
- Somoza, Gustavo Manuel, et al. ; Young, Brian Jonathan; López, Gabriela Carina; Cristos, Diego Sebastián; Crespo, Diana Cristina; Carriquiriborde, Pedro; Show all 6 Authors
- Source:
- Environmental toxicology and chemistry 2017 v.36 no.7 pp. 1738-1745
- ISSN:
- 0730-7268
- Subject:
- Cnesterodon decemmaculatus; adults; chronic exposure; fish; histology; liver; males; necrosis; oocytes; secretion; streams; testes
- Abstract:
- ... The aim of the present study was to assess the responses of the gonopodium morphology and the gonadal and liver histology of adult male Cnesterodon decemmaculatus to sublethal long‐term exposure concentrations of 17α‐ethinylestradiol (EE2). Two experiments were conducted exposing the fish to waterborne concentrations of EE2 ranging from 20 ng/L to 200 ng/L for 8 wk, 12 wk, and 16 wk. Intersex gona ...
- DOI:
- 10.1002/etc.3547
-
http://dx.doi.org/10.1002/etc.3547
- Author:
- Somoza, Gustavo Manuel, et al. ; Bach, Nadia Carla; Natale, Guillermo Sebastián; Ronco, Alicia Estela; Show all 4 Authors
- Source:
- Environmental science and pollution research international 2016 v.23 no.23 pp. 23959-23971
- ISSN:
- 0944-1344
- Subject:
- Leptodactylus; active ingredients; agroecosystems; bioassays; exposure duration; frogs; glyphosate; larvae; mortality; mouthparts; sublethal effects; swimming; Argentina
- Abstract:
- ... We evaluated the acute lethal and sublethal effects of technical-grade glyphosate (GLY) and the GLY-based commercial formulation Roundup ULTRA MAX® (RU) on two Gosner stages (Gss) 25 and 36 of the South-American Creole frog, Leptodactylus latrans. Bioassays were performed following standardized methods within a wide range of concentrations (0.0007–9.62 mg of acid equivalents per liter—a.e./L—of RU ...
- DOI:
- 10.1007/s11356-016-7631-z
-
http://dx.doi.org/10.1007/s11356-016-7631-z
- Author:
- Somoza, Gustavo Manuel, et al. ; Blasco, Martín; Vizziano-Cantonnet, Denise; Show all 3 Authors
- Source:
- Fish physiology and biochemistry 2013 v.39 no.1 pp. 71-74
- ISSN:
- 0920-1742
- Subject:
- androgens; enzyme activity; gonads; high performance liquid chromatography; histology; larvae; peritoneum; sexual development; temperature; thin layer chromatography
- Abstract:
- ... The involvement of androgens during sex differentiation period was investigated in the pejerrey Odontesthes bonariensis, by classic biochemical studies and gonadal histology. We studied in particular whether the enzyme activities involved in 11-oxygenated androgen production were active in a gonadal/peritoneum complex (GPC) of very small larvae exposed to masculinizing temperatures previous to mor ...
- DOI:
- 10.1007/s10695-012-9651-z
- PubMed:
- 22580925
-
http://dx.doi.org/10.1007/s10695-012-9651-z
- Author:
- Somoza, Gustavo Manuel, et al. ; Valdés, María Eugenia; Marino, Damián José; Wunderlin, Daniel Alberto; Ronco, Alicia Estela; Carriquiriborde, Pedro; Show all 6 Authors
- Source:
- Bulletin of environmental contamination and toxicology 2015 v.94 no.1 pp. 29-33
- ISSN:
- 0007-4861
- Subject:
- estradiol; estrone; estuaries; risk; screening; sewage; sewage effluent; streams; surface water; water supply; Argentina
- Abstract:
- ... Concentrations of estrone (E1), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) were investigated for the first time in sewage effluents and receiving waters of the “Río de la Plata” estuary and neighboring areas by means of LC–MS/MS. E2 and EE2 were ubiquitous in the evaluated sewage effluent samples showing concentrations ranging between 122–631 and 65–187 ng/L, respectively. In surface waters ...
- DOI:
- 10.1007/s00128-014-1417-0
-
http://dx.doi.org/10.1007/s00128-014-1417-0