Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus

Timing of breeding to an optimal season is a requirement for a successful reproductive outcome in seasonally breeding species. Photoperiodic signals are capable of modifying the reproductive behaviour and reproductive systems in several vertebrate species. The cichlid fish Cichlasoma dimerus shows h...

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Autores principales:	Fiszbein, Ana, Cánepa, Maximiliano Martín, Maggese, María Cristina Irene, Pandolfi, Matías
Publicado:	2010
Materias:	GnRH Gonadotropins Growth hormone Pituitary Prolactin Somatolactin gonadorelin hypophysis hormone aggression animal cell animal experiment animal tissue article breeding cichlid controlled study female genital system light dark cycle male mate choice morphometrics nonhuman photoperiodicity priority journal reproduction season sexual behavior social status spawning temperature Analysis of Variance Animals Brain Choice Behavior Cichlids Female Fish Proteins Glycoproteins Gonadotropin-Releasing Hormone Hematocrit Humans Hypothalamo-Hypophyseal System Intercellular Signaling Peptides and Proteins Male Neurons Photoperiod Pituitary Hormones Pituitary-Adrenal System Pyrrolidonecarboxylic Acid Reproductive Physiological Phenomena Sexual Behavior, Animal
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v99_n4_p425_Fiszbein http://hdl.handle.net/20.500.12110/paper_00319384_v99_n4_p425_Fiszbein
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00319384_v99_n4_p425_Fiszbein
record_format	dspace
spelling	paper:paper_00319384_v99_n4_p425_Fiszbein2023-06-08T14:59:05Z Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus Fiszbein, Ana Cánepa, Maximiliano Martín Maggese, María Cristina Irene Pandolfi, Matías GnRH Gonadotropins Growth hormone Pituitary Prolactin Somatolactin gonadorelin hypophysis hormone aggression animal cell animal experiment animal tissue article breeding cichlid controlled study female genital system light dark cycle male mate choice morphometrics nonhuman photoperiodicity priority journal reproduction season sexual behavior social status spawning temperature Analysis of Variance Animals Brain Choice Behavior Cichlids Female Fish Proteins Glycoproteins Gonadotropin-Releasing Hormone Hematocrit Humans Hypothalamo-Hypophyseal System Intercellular Signaling Peptides and Proteins Male Neurons Photoperiod Pituitary Hormones Pituitary-Adrenal System Prolactin Pyrrolidonecarboxylic Acid Reproductive Physiological Phenomena Sexual Behavior, Animal Timing of breeding to an optimal season is a requirement for a successful reproductive outcome in seasonally breeding species. Photoperiodic signals are capable of modifying the reproductive behaviour and reproductive systems in several vertebrate species. The cichlid fish Cichlasoma dimerus shows highly organized breeding activities and different social status. The aim of this study is to test whether C. dimerus reproductive behaviour (male aggressive behaviour and female choice) and reproductive physiology (GnRH3 morphometric parameters, pituitary hormones content and organ-somatic indexes) are modulated by photoperiod. Before spawning, dominant pairs were isolated and kept in opposite tanks of 20 l for one week, so they could see each other but not physically interact. Afterwards, a group was exposed for four weeks to a short photoperiod (8 h light:16 h dark) (short photoperiod exposed animals: SP) while another group was exposed to a long photoperiod (14 h light:10 h dark) (long photoperiod exposed animals: LP). Temperature was maintained constant. Behavioural experiments showed that male aggression related to territory selection and its defence is reduced in SP males. Further, SP females were never chosen. At the brain level we demonstrated that GnRH3 neuronal optical density of staining was reduced. Finally, at the pituitary level we showed that SP males showed low levels of β-LH, PRL and GH in the pituitary, and that SP females showed no significant differences in the pituitary content of any hormone. Taken all together these results suggest that in C. dimerus the photoperiod is a relevant environmental cue related to reproductive behaviour and physiology. © 2009 Elsevier Inc. All rights reserved. Fil:Fiszbein, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cánepa, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Maggese, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pandolfi, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v99_n4_p425_Fiszbein http://hdl.handle.net/20.500.12110/paper_00319384_v99_n4_p425_Fiszbein
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	GnRH Gonadotropins Growth hormone Pituitary Prolactin Somatolactin gonadorelin hypophysis hormone aggression animal cell animal experiment animal tissue article breeding cichlid controlled study female genital system light dark cycle male mate choice morphometrics nonhuman photoperiodicity priority journal reproduction season sexual behavior social status spawning temperature Analysis of Variance Animals Brain Choice Behavior Cichlids Female Fish Proteins Glycoproteins Gonadotropin-Releasing Hormone Hematocrit Humans Hypothalamo-Hypophyseal System Intercellular Signaling Peptides and Proteins Male Neurons Photoperiod Pituitary Hormones Pituitary-Adrenal System Prolactin Pyrrolidonecarboxylic Acid Reproductive Physiological Phenomena Sexual Behavior, Animal
spellingShingle	GnRH Gonadotropins Growth hormone Pituitary Prolactin Somatolactin gonadorelin hypophysis hormone aggression animal cell animal experiment animal tissue article breeding cichlid controlled study female genital system light dark cycle male mate choice morphometrics nonhuman photoperiodicity priority journal reproduction season sexual behavior social status spawning temperature Analysis of Variance Animals Brain Choice Behavior Cichlids Female Fish Proteins Glycoproteins Gonadotropin-Releasing Hormone Hematocrit Humans Hypothalamo-Hypophyseal System Intercellular Signaling Peptides and Proteins Male Neurons Photoperiod Pituitary Hormones Pituitary-Adrenal System Prolactin Pyrrolidonecarboxylic Acid Reproductive Physiological Phenomena Sexual Behavior, Animal Fiszbein, Ana Cánepa, Maximiliano Martín Maggese, María Cristina Irene Pandolfi, Matías Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
topic_facet	GnRH Gonadotropins Growth hormone Pituitary Prolactin Somatolactin gonadorelin hypophysis hormone aggression animal cell animal experiment animal tissue article breeding cichlid controlled study female genital system light dark cycle male mate choice morphometrics nonhuman photoperiodicity priority journal reproduction season sexual behavior social status spawning temperature Analysis of Variance Animals Brain Choice Behavior Cichlids Female Fish Proteins Glycoproteins Gonadotropin-Releasing Hormone Hematocrit Humans Hypothalamo-Hypophyseal System Intercellular Signaling Peptides and Proteins Male Neurons Photoperiod Pituitary Hormones Pituitary-Adrenal System Prolactin Pyrrolidonecarboxylic Acid Reproductive Physiological Phenomena Sexual Behavior, Animal
description	Timing of breeding to an optimal season is a requirement for a successful reproductive outcome in seasonally breeding species. Photoperiodic signals are capable of modifying the reproductive behaviour and reproductive systems in several vertebrate species. The cichlid fish Cichlasoma dimerus shows highly organized breeding activities and different social status. The aim of this study is to test whether C. dimerus reproductive behaviour (male aggressive behaviour and female choice) and reproductive physiology (GnRH3 morphometric parameters, pituitary hormones content and organ-somatic indexes) are modulated by photoperiod. Before spawning, dominant pairs were isolated and kept in opposite tanks of 20 l for one week, so they could see each other but not physically interact. Afterwards, a group was exposed for four weeks to a short photoperiod (8 h light:16 h dark) (short photoperiod exposed animals: SP) while another group was exposed to a long photoperiod (14 h light:10 h dark) (long photoperiod exposed animals: LP). Temperature was maintained constant. Behavioural experiments showed that male aggression related to territory selection and its defence is reduced in SP males. Further, SP females were never chosen. At the brain level we demonstrated that GnRH3 neuronal optical density of staining was reduced. Finally, at the pituitary level we showed that SP males showed low levels of β-LH, PRL and GH in the pituitary, and that SP females showed no significant differences in the pituitary content of any hormone. Taken all together these results suggest that in C. dimerus the photoperiod is a relevant environmental cue related to reproductive behaviour and physiology. © 2009 Elsevier Inc. All rights reserved.
author	Fiszbein, Ana Cánepa, Maximiliano Martín Maggese, María Cristina Irene Pandolfi, Matías
author_facet	Fiszbein, Ana Cánepa, Maximiliano Martín Maggese, María Cristina Irene Pandolfi, Matías
author_sort	Fiszbein, Ana
title	Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
title_short	Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
title_full	Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
title_fullStr	Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
title_full_unstemmed	Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus
title_sort	photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish cichlasoma dimerus
publishDate	2010
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v99_n4_p425_Fiszbein http://hdl.handle.net/20.500.12110/paper_00319384_v99_n4_p425_Fiszbein
work_keys_str_mv	AT fiszbeinana photoperiodicmodulationofreproductivephysiologyandbehaviourinthecichlidfishcichlasomadimerus AT canepamaximilianomartin photoperiodicmodulationofreproductivephysiologyandbehaviourinthecichlidfishcichlasomadimerus AT maggesemariacristinairene photoperiodicmodulationofreproductivephysiologyandbehaviourinthecichlidfishcichlasomadimerus AT pandolfimatias photoperiodicmodulationofreproductivephysiologyandbehaviourinthecichlidfishcichlasomadimerus
_version_	1768542448763535360

Photoperiodic modulation of reproductive physiology and behaviour in the cichlid fish Cichlasoma dimerus

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