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: Varela, M.L., Ferreira, M.F., Da Cuña, R.H., Lo Nostro, F.L., Genovese, G., Meijide, F.J.
Formato: JOUR
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: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 todo:paper_00084301_v95_n7_p485_Varela
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spelling todo:paper_00084301_v95_n7_p485_Varela2023-10-03T14:06:07Z Dynamics of ovarian maturation throughout the reproductive cycle of the neotropical cichlid fish Cichlasoma dimerus (Teleostei, Cichliformes) Varela, M.L. Ferreira, M.F. Da Cuña, R.H. Lo Nostro, F.L. Genovese, G. Meijide, F.J. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Varela, M.L.
Ferreira, M.F.
Da Cuña, R.H.
Lo Nostro, F.L.
Genovese, G.
Meijide, F.J.
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.
format JOUR
author Varela, M.L.
Ferreira, M.F.
Da Cuña, R.H.
Lo Nostro, F.L.
Genovese, G.
Meijide, F.J.
author_facet Varela, M.L.
Ferreira, M.F.
Da Cuña, R.H.
Lo Nostro, F.L.
Genovese, G.
Meijide, F.J.
author_sort Varela, M.L.
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)
url http://hdl.handle.net/20.500.12110/paper_00084301_v95_n7_p485_Varela
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