Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)

In this study, we analyzed gene expression profiles, plasma steroids concentrations, and gonadal morphology throughout the reproductive cycle of female Cichlasoma dimerus (Heckel, 1840), a monogamous cichlid fish exhibiting social hierarchies. Fish were analyzed at six phases encompassing their annu...

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Autores principales:	Da Cuña, Rodrigo Hernán, Lo Nostro, Fabiana Laura, Genovese, Griselda, Meijide, Fernando Javier
Publicado:	2017
Materias:	Acará cichlid Asynchronous ovarian development Cichlasoma dimerus Gene expression Gonadal histology Plasma steroids Reproductive cycle biochemical composition blood cichlid correlation gene expression histology maturation monogamy morphology morphometry Neotropical Region physiology reproductive cycle spawning steroid Cichlasoma Cichlidae Teleostei
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v95_n7_p485_Varela http://hdl.handle.net/20.500.12110/paper_00084301_v95_n7_p485_Varela
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00084301_v95_n7_p485_Varela
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spelling	paper:paper_00084301_v95_n7_p485_Varela2023-06-08T14:32:04Z Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes) Da Cuña, Rodrigo Hernán Lo Nostro, Fabiana Laura Genovese, Griselda Meijide, Fernando Javier Acará cichlid Asynchronous ovarian development Cichlasoma dimerus Gene expression Gonadal histology Plasma steroids Reproductive cycle biochemical composition blood cichlid correlation gene expression histology maturation monogamy morphology morphometry Neotropical Region physiology reproductive cycle spawning steroid Cichlasoma Cichlidae Teleostei In this study, we analyzed gene expression profiles, plasma steroids concentrations, and gonadal morphology throughout the reproductive cycle of female Cichlasoma dimerus (Heckel, 1840), a monogamous cichlid fish exhibiting social hierarchies. Fish were analyzed at six phases encompassing their annual cycle, namely resting (during the nonreproductive period), prespawning, 30 h post spawning, 4 days post spawning, 10 days post spawning, and subordinate (during the reproductive period). The histological and histomorphometric analysis showed that C. dimerus exhibits asynchronous ovarian development. Similar to resting females, subordinate females showed low gonadosomatic index, reduced expression levels of vitellogenin (vtgAb), zona pellucida (zpB), gonadal aromatase (cyp19a1A), and low concentrations of plasma sex steroids, thus indicating that social intimidation by dominant conspecifics elicited reproductive arrest. In reproductively active females, a direct positive correlation between plasma estradiol, vtgAb expression, percentage of late vitellogenic oocytes, and gonadosomatic index was observed. These parameters were maximal at the prespawning phase, decreased at 30 h post spawning and 4 days post spawning, and then reached a peak at 10 days post spawning. Our results indicate that female C. dimerus become spawning capable after 10 days post spawning, coincidently with the shortest time interval between successive spawns recorded in captivity. © 2017, Canadian Science Publishing. All rights reserved. Fil:Da Cuña, R.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lo Nostro, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Genovese, G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Meijide, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v95_n7_p485_Varela http://hdl.handle.net/20.500.12110/paper_00084301_v95_n7_p485_Varela
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Acará cichlid Asynchronous ovarian development Cichlasoma dimerus Gene expression Gonadal histology Plasma steroids Reproductive cycle biochemical composition blood cichlid correlation gene expression histology maturation monogamy morphology morphometry Neotropical Region physiology reproductive cycle spawning steroid Cichlasoma Cichlidae Teleostei
spellingShingle	Acará cichlid Asynchronous ovarian development Cichlasoma dimerus Gene expression Gonadal histology Plasma steroids Reproductive cycle biochemical composition blood cichlid correlation gene expression histology maturation monogamy morphology morphometry Neotropical Region physiology reproductive cycle spawning steroid Cichlasoma Cichlidae Teleostei Da Cuña, Rodrigo Hernán Lo Nostro, Fabiana Laura Genovese, Griselda Meijide, Fernando Javier Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
topic_facet	Acará cichlid Asynchronous ovarian development Cichlasoma dimerus Gene expression Gonadal histology Plasma steroids Reproductive cycle biochemical composition blood cichlid correlation gene expression histology maturation monogamy morphology morphometry Neotropical Region physiology reproductive cycle spawning steroid Cichlasoma Cichlidae Teleostei
description	In this study, we analyzed gene expression profiles, plasma steroids concentrations, and gonadal morphology throughout the reproductive cycle of female Cichlasoma dimerus (Heckel, 1840), a monogamous cichlid fish exhibiting social hierarchies. Fish were analyzed at six phases encompassing their annual cycle, namely resting (during the nonreproductive period), prespawning, 30 h post spawning, 4 days post spawning, 10 days post spawning, and subordinate (during the reproductive period). The histological and histomorphometric analysis showed that C. dimerus exhibits asynchronous ovarian development. Similar to resting females, subordinate females showed low gonadosomatic index, reduced expression levels of vitellogenin (vtgAb), zona pellucida (zpB), gonadal aromatase (cyp19a1A), and low concentrations of plasma sex steroids, thus indicating that social intimidation by dominant conspecifics elicited reproductive arrest. In reproductively active females, a direct positive correlation between plasma estradiol, vtgAb expression, percentage of late vitellogenic oocytes, and gonadosomatic index was observed. These parameters were maximal at the prespawning phase, decreased at 30 h post spawning and 4 days post spawning, and then reached a peak at 10 days post spawning. Our results indicate that female C. dimerus become spawning capable after 10 days post spawning, coincidently with the shortest time interval between successive spawns recorded in captivity. © 2017, Canadian Science Publishing. All rights reserved.
author	Da Cuña, Rodrigo Hernán Lo Nostro, Fabiana Laura Genovese, Griselda Meijide, Fernando Javier
author_facet	Da Cuña, Rodrigo Hernán Lo Nostro, Fabiana Laura Genovese, Griselda Meijide, Fernando Javier
author_sort	Da Cuña, Rodrigo Hernán
title	Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
title_short	Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
title_full	Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
title_fullStr	Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
title_full_unstemmed	Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)
title_sort	dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish cichlasoma dimerus (teleostei, cichliformes)
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00084301_v95_n7_p485_Varela http://hdl.handle.net/20.500.12110/paper_00084301_v95_n7_p485_Varela
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Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes)

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