Reproductive and parental care physiology of Cichlasoma dimerus males

The South American cichlid fish Cichlasoma dimerus presents a high breeding frequency and biparental care of the eggs and larvae. The male parental care period was divided in four different phases according to the developmental degree of the offspring: pre-spawning activity (MP, day 0), guarding egg...

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Autores principales:	Ramallo, Martín R., Lo Nostro, Fabiana Laura, Pandolfi, Matías
Publicado:	2015
Materias:	Cichlids Leydig cells Parental care Sexual steroids Spermatogenesis 11 oxotestosterone estradiol hydrocortisone testosterone androgen adult animal cell animal experiment Article cell composition Cichlasoma dimerus cichlid controlled study female fertilization histology larva Leydig cell male male animal morphometrics nonhuman parental behavior priority journal qualitative analysis quantitative analysis reproductive behavior spawning spermatogonium spermatozoon steroid blood level animal animal behavior cytology growth, development and aging human metabolism physiology reproduction spermatogenesis testis Androgens Animals Behavior, Animal Fertilization Humans Larva Leydig Cells Male Reproduction Reproductive Physiological Processes Testis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v221_n_p193_Birba http://hdl.handle.net/20.500.12110/paper_00166480_v221_n_p193_Birba
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00166480_v221_n_p193_Birba
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spelling	paper:paper_00166480_v221_n_p193_Birba2023-06-08T14:38:21Z Reproductive and parental care physiology of Cichlasoma dimerus males Ramallo, Martín R. Lo Nostro, Fabiana Laura Pandolfi, Matías Cichlids Leydig cells Parental care Sexual steroids Spermatogenesis 11 oxotestosterone estradiol hydrocortisone testosterone androgen adult animal cell animal experiment Article cell composition Cichlasoma dimerus cichlid controlled study female fertilization histology larva Leydig cell male male animal morphometrics nonhuman parental behavior priority journal qualitative analysis quantitative analysis reproductive behavior spawning spermatogonium spermatozoon steroid blood level animal animal behavior cichlid cytology growth, development and aging human metabolism physiology reproduction spermatogenesis testis Androgens Animals Behavior, Animal Cichlids Fertilization Humans Larva Leydig Cells Male Reproduction Reproductive Physiological Processes Spermatogenesis Testis The South American cichlid fish Cichlasoma dimerus presents a high breeding frequency and biparental care of the eggs and larvae. The male parental care period was divided in four different phases according to the developmental degree of the offspring: pre-spawning activity (MP, day 0), guarding eggs (ME, one day after fertilization (1 DAF)), guarding hatched larvae (MHL, 3 DAF), and guarding swimming larvae (MSL, 8 DAF). The aim of this study was to characterize male reproductive physiology by measuring steroid hormone plasma levels and analyzing testes cellular composition. Males exhibiting pre-spawning activity showed 8.4 times higher 11-ketotestosterone and 5.63 times higher testosterone levels than MHL. No differences were observed in estradiol and cortisol levels among the different phases. The cellular composition of the testes varied during the reproductive and parental care periods. Testes of MP were composed of 50% of spermatozoa, whereas spermatogonia type B and spermatocytes were predominant in the subsequent parental phases. A morphometric analysis of Leydig cells nuclear area revealed that MP and ME's Leydig cells averaged 1.27 times larger than that those of MHL and MSL and was positively correlated with circulating 11-KT and T levels. Hence, C. dimerus males showed important changes in its hormonal profiles and testicular cellular composition throughout the reproductive and parental care period. © 2015 Elsevier Inc. Fil:Ramallo, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lo Nostro, F. 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v221_n_p193_Birba http://hdl.handle.net/20.500.12110/paper_00166480_v221_n_p193_Birba
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cichlids Leydig cells Parental care Sexual steroids Spermatogenesis 11 oxotestosterone estradiol hydrocortisone testosterone androgen adult animal cell animal experiment Article cell composition Cichlasoma dimerus cichlid controlled study female fertilization histology larva Leydig cell male male animal morphometrics nonhuman parental behavior priority journal qualitative analysis quantitative analysis reproductive behavior spawning spermatogonium spermatozoon steroid blood level animal animal behavior cichlid cytology growth, development and aging human metabolism physiology reproduction spermatogenesis testis Androgens Animals Behavior, Animal Cichlids Fertilization Humans Larva Leydig Cells Male Reproduction Reproductive Physiological Processes Spermatogenesis Testis
spellingShingle	Cichlids Leydig cells Parental care Sexual steroids Spermatogenesis 11 oxotestosterone estradiol hydrocortisone testosterone androgen adult animal cell animal experiment Article cell composition Cichlasoma dimerus cichlid controlled study female fertilization histology larva Leydig cell male male animal morphometrics nonhuman parental behavior priority journal qualitative analysis quantitative analysis reproductive behavior spawning spermatogonium spermatozoon steroid blood level animal animal behavior cichlid cytology growth, development and aging human metabolism physiology reproduction spermatogenesis testis Androgens Animals Behavior, Animal Cichlids Fertilization Humans Larva Leydig Cells Male Reproduction Reproductive Physiological Processes Spermatogenesis Testis Ramallo, Martín R. Lo Nostro, Fabiana Laura Pandolfi, Matías Reproductive and parental care physiology of Cichlasoma dimerus males
topic_facet	Cichlids Leydig cells Parental care Sexual steroids Spermatogenesis 11 oxotestosterone estradiol hydrocortisone testosterone androgen adult animal cell animal experiment Article cell composition Cichlasoma dimerus cichlid controlled study female fertilization histology larva Leydig cell male male animal morphometrics nonhuman parental behavior priority journal qualitative analysis quantitative analysis reproductive behavior spawning spermatogonium spermatozoon steroid blood level animal animal behavior cichlid cytology growth, development and aging human metabolism physiology reproduction spermatogenesis testis Androgens Animals Behavior, Animal Cichlids Fertilization Humans Larva Leydig Cells Male Reproduction Reproductive Physiological Processes Spermatogenesis Testis
description	The South American cichlid fish Cichlasoma dimerus presents a high breeding frequency and biparental care of the eggs and larvae. The male parental care period was divided in four different phases according to the developmental degree of the offspring: pre-spawning activity (MP, day 0), guarding eggs (ME, one day after fertilization (1 DAF)), guarding hatched larvae (MHL, 3 DAF), and guarding swimming larvae (MSL, 8 DAF). The aim of this study was to characterize male reproductive physiology by measuring steroid hormone plasma levels and analyzing testes cellular composition. Males exhibiting pre-spawning activity showed 8.4 times higher 11-ketotestosterone and 5.63 times higher testosterone levels than MHL. No differences were observed in estradiol and cortisol levels among the different phases. The cellular composition of the testes varied during the reproductive and parental care periods. Testes of MP were composed of 50% of spermatozoa, whereas spermatogonia type B and spermatocytes were predominant in the subsequent parental phases. A morphometric analysis of Leydig cells nuclear area revealed that MP and ME's Leydig cells averaged 1.27 times larger than that those of MHL and MSL and was positively correlated with circulating 11-KT and T levels. Hence, C. dimerus males showed important changes in its hormonal profiles and testicular cellular composition throughout the reproductive and parental care period. © 2015 Elsevier Inc.
author	Ramallo, Martín R. Lo Nostro, Fabiana Laura Pandolfi, Matías
author_facet	Ramallo, Martín R. Lo Nostro, Fabiana Laura Pandolfi, Matías
author_sort	Ramallo, Martín R.
title	Reproductive and parental care physiology of Cichlasoma dimerus males
title_short	Reproductive and parental care physiology of Cichlasoma dimerus males
title_full	Reproductive and parental care physiology of Cichlasoma dimerus males
title_fullStr	Reproductive and parental care physiology of Cichlasoma dimerus males
title_full_unstemmed	Reproductive and parental care physiology of Cichlasoma dimerus males
title_sort	reproductive and parental care physiology of cichlasoma dimerus males
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166480_v221_n_p193_Birba http://hdl.handle.net/20.500.12110/paper_00166480_v221_n_p193_Birba
work_keys_str_mv	AT ramallomartinr reproductiveandparentalcarephysiologyofcichlasomadimerusmales AT lonostrofabianalaura reproductiveandparentalcarephysiologyofcichlasomadimerusmales AT pandolfimatias reproductiveandparentalcarephysiologyofcichlasomadimerusmales
_version_	1768545908943749120

Reproductive and parental care physiology of Cichlasoma dimerus males

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