Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)

The present study aimed at analyzing spermatogenesis and the changes occurring in the testis throughout the reproductive cycle in the South American perciform fish Cichlasoma dimerus. Testes were studied using light and electron microscopy techniques. This species has an unrestricted lobular testis...

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Detalles Bibliográficos
Autores principales: Meijide, Fernando Javier, Guerrero, Graciela Alicia
Publicado: 2012
Materias:
Biflagellate spermatozoa
Cichlidae
Reproductive cycle
Spermatogenesis
Testicular structure
breeding season
cichlid
cytology
laboratory method
maturation
reproductive behavior
reproductive biology
reproductive cycle
sperm
Cichlasoma
Perciformes
Teleostei
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v93_n3_p338_Vazquez
http://hdl.handle.net/20.500.12110/paper_00017272_v93_n3_p338_Vazquez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00017272_v93_n3_p338_Vazquez
record_format dspace
spelling paper:paper_00017272_v93_n3_p338_Vazquez2023-06-08T14:21:24Z Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes) Meijide, Fernando Javier Guerrero, Graciela Alicia Biflagellate spermatozoa Cichlidae Reproductive cycle Spermatogenesis Testicular structure breeding season cichlid cytology laboratory method maturation reproductive behavior reproductive biology reproductive cycle sperm Cichlasoma Cichlidae Perciformes Teleostei The present study aimed at analyzing spermatogenesis and the changes occurring in the testis throughout the reproductive cycle in the South American perciform fish Cichlasoma dimerus. Testes were studied using light and electron microscopy techniques. This species has an unrestricted lobular testis composed of two compartments: germinal, containing Sertoli and germ cells, exhibiting a cystic mode of spermatogenesis; and interstitial, composed of Leydig cells and connective tissue elements. Spermatozoa belong to the anacrosomal type I aquasperm and possess two flagella, this being the first report of an externally fertilizing cichlid exhibiting biflagellate sperm. Under laboratory conditions, C. dimerus proved to be a multiple spawner throughout the year, with a season of higher reproductive activity extending from September to March, during which fish spawned on average every 29.4days. Changes in the germinal epithelium and the germ cell stages present allowed the description of five reproductive classes: regressed, early, mid-, and late maturation, and regression. During the high reproductive season, each cycle went through the first four classes. The regressed class overlapped with the late maturation class, because sperm was being released while spermatogonia were proliferating. The regression class occurred solely in sexually inactive males during the period of low reproductive activity. © 2011 The Authors. Acta Zoologica © 2011 The Royal Swedish Academy of Sciences. Fil:Meijide, F.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Guerrero, G.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v93_n3_p338_Vazquez http://hdl.handle.net/20.500.12110/paper_00017272_v93_n3_p338_Vazquez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Biflagellate spermatozoa
Cichlidae
Reproductive cycle
Spermatogenesis
Testicular structure
breeding season
cichlid
cytology
laboratory method
maturation
reproductive behavior
reproductive biology
reproductive cycle
sperm
Cichlasoma
Cichlidae
Perciformes
Teleostei
spellingShingle Biflagellate spermatozoa
Cichlidae
Reproductive cycle
Spermatogenesis
Testicular structure
breeding season
cichlid
cytology
laboratory method
maturation
reproductive behavior
reproductive biology
reproductive cycle
sperm
Cichlasoma
Cichlidae
Perciformes
Teleostei
Meijide, Fernando Javier
Guerrero, Graciela Alicia
Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
topic_facet Biflagellate spermatozoa
Cichlidae
Reproductive cycle
Spermatogenesis
Testicular structure
breeding season
cichlid
cytology
laboratory method
maturation
reproductive behavior
reproductive biology
reproductive cycle
sperm
Cichlasoma
Cichlidae
Perciformes
Teleostei
description The present study aimed at analyzing spermatogenesis and the changes occurring in the testis throughout the reproductive cycle in the South American perciform fish Cichlasoma dimerus. Testes were studied using light and electron microscopy techniques. This species has an unrestricted lobular testis composed of two compartments: germinal, containing Sertoli and germ cells, exhibiting a cystic mode of spermatogenesis; and interstitial, composed of Leydig cells and connective tissue elements. Spermatozoa belong to the anacrosomal type I aquasperm and possess two flagella, this being the first report of an externally fertilizing cichlid exhibiting biflagellate sperm. Under laboratory conditions, C. dimerus proved to be a multiple spawner throughout the year, with a season of higher reproductive activity extending from September to March, during which fish spawned on average every 29.4days. Changes in the germinal epithelium and the germ cell stages present allowed the description of five reproductive classes: regressed, early, mid-, and late maturation, and regression. During the high reproductive season, each cycle went through the first four classes. The regressed class overlapped with the late maturation class, because sperm was being released while spermatogonia were proliferating. The regression class occurred solely in sexually inactive males during the period of low reproductive activity. © 2011 The Authors. Acta Zoologica © 2011 The Royal Swedish Academy of Sciences.
author Meijide, Fernando Javier
Guerrero, Graciela Alicia
author_facet Meijide, Fernando Javier
Guerrero, Graciela Alicia
author_sort Meijide, Fernando Javier
title Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
title_short Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
title_full Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
title_fullStr Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
title_full_unstemmed Spermatogenesis and changes in testicular structure during the reproductive cycle in Cichlasoma dimerus (Teleostei, Perciformes)
title_sort spermatogenesis and changes in testicular structure during the reproductive cycle in cichlasoma dimerus (teleostei, perciformes)
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00017272_v93_n3_p338_Vazquez
http://hdl.handle.net/20.500.12110/paper_00017272_v93_n3_p338_Vazquez
work_keys_str_mv AT meijidefernandojavier spermatogenesisandchangesintesticularstructureduringthereproductivecycleincichlasomadimerusteleosteiperciformes
AT guerrerogracielaalicia spermatogenesisandchangesintesticularstructureduringthereproductivecycleincichlasomadimerusteleosteiperciformes
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