Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer

Several fish species of the suborder Notothenioidei (Perciformes) predominate in the Antarctic Convergence Zone; nevertheless, reproductive studies are scarce due to difficulties on regular sampling. This study takes the research area of reproductive biology of notothenioids to a new level by provid...

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Autores principales:	Lo Nostro, Fabiana Laura, Ansaldo, Martín, Genovese, Griselda
Publicado:	2017
Materias:	Group synchronous ovarian development Nototheniidae Potter Cove Sex steroids Vitellogenin convergence embryonic development histology morphology perciform reproductive behavior reproductive biology sex hormone sexual maturity spawning population steroid summer Antarctica King George Island South Shetland Islands Notothenia rossii Notothenioidei Perciformes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v40_n1_p_Ferreira http://hdl.handle.net/20.500.12110/paper_07224060_v40_n1_p_Ferreira
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07224060_v40_n1_p_Ferreira
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spelling	paper:paper_07224060_v40_n1_p_Ferreira2023-06-08T15:43:39Z Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer Lo Nostro, Fabiana Laura Ansaldo, Martín Genovese, Griselda Group synchronous ovarian development Nototheniidae Potter Cove Sex steroids Vitellogenin convergence embryonic development histology morphology perciform reproductive behavior reproductive biology sex hormone sexual maturity spawning population steroid summer Antarctica King George Island King George Island Potter Cove South Shetland Islands Notothenia rossii Nototheniidae Notothenioidei Perciformes Several fish species of the suborder Notothenioidei (Perciformes) predominate in the Antarctic Convergence Zone; nevertheless, reproductive studies are scarce due to difficulties on regular sampling. This study takes the research area of reproductive biology of notothenioids to a new level by providing, for the first time, data on sex hormone and vitellogenin detection in the blood of females of Notothenia rossii and N. coriiceps and correlates this data with morphological maturity indices as well as ovarian histology. Fish were captured during the Antarctic summer at Potter Cove, 25 de Mayo (King George) Island, and blood and ovary were collected. Histological analysis revealed that females of both fish possess group synchronous ovarian development with two distinct clutches of oocytes: a more advanced batch of vitellogenic oocytes ready for spawning and a second batch of previtellogenic oocytes for the next spawning event. Since liver vitellogenin synthesis is stimulated by estradiol produced by the ovaries, gonadal development, estradiol levels, and vitellogenin showed that both species were at a more advanced stage of maturation in March than in January. On the other hand and irrespectively of the month, gonadosomatic index and plasma estradiol levels of N. coriiceps were higher than those of N. rossii. Furthermore, females of N. coriiceps showed an advanced stage of vitellogenesis or were ready for spawn, contrary to results of previous studies. Our results indicate the successful use of gonadal morphology, estradiol, and vitellogenin detection for the estimation of sexual maturity stage of female adults. © 2016, Springer-Verlag Berlin Heidelberg. Fil:Lo Nostro, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ansaldo, M. 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. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v40_n1_p_Ferreira http://hdl.handle.net/20.500.12110/paper_07224060_v40_n1_p_Ferreira
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Group synchronous ovarian development Nototheniidae Potter Cove Sex steroids Vitellogenin convergence embryonic development histology morphology perciform reproductive behavior reproductive biology sex hormone sexual maturity spawning population steroid summer Antarctica King George Island King George Island Potter Cove South Shetland Islands Notothenia rossii Nototheniidae Notothenioidei Perciformes
spellingShingle	Group synchronous ovarian development Nototheniidae Potter Cove Sex steroids Vitellogenin convergence embryonic development histology morphology perciform reproductive behavior reproductive biology sex hormone sexual maturity spawning population steroid summer Antarctica King George Island King George Island Potter Cove South Shetland Islands Notothenia rossii Nototheniidae Notothenioidei Perciformes Lo Nostro, Fabiana Laura Ansaldo, Martín Genovese, Griselda Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
topic_facet	Group synchronous ovarian development Nototheniidae Potter Cove Sex steroids Vitellogenin convergence embryonic development histology morphology perciform reproductive behavior reproductive biology sex hormone sexual maturity spawning population steroid summer Antarctica King George Island King George Island Potter Cove South Shetland Islands Notothenia rossii Nototheniidae Notothenioidei Perciformes
description	Several fish species of the suborder Notothenioidei (Perciformes) predominate in the Antarctic Convergence Zone; nevertheless, reproductive studies are scarce due to difficulties on regular sampling. This study takes the research area of reproductive biology of notothenioids to a new level by providing, for the first time, data on sex hormone and vitellogenin detection in the blood of females of Notothenia rossii and N. coriiceps and correlates this data with morphological maturity indices as well as ovarian histology. Fish were captured during the Antarctic summer at Potter Cove, 25 de Mayo (King George) Island, and blood and ovary were collected. Histological analysis revealed that females of both fish possess group synchronous ovarian development with two distinct clutches of oocytes: a more advanced batch of vitellogenic oocytes ready for spawning and a second batch of previtellogenic oocytes for the next spawning event. Since liver vitellogenin synthesis is stimulated by estradiol produced by the ovaries, gonadal development, estradiol levels, and vitellogenin showed that both species were at a more advanced stage of maturation in March than in January. On the other hand and irrespectively of the month, gonadosomatic index and plasma estradiol levels of N. coriiceps were higher than those of N. rossii. Furthermore, females of N. coriiceps showed an advanced stage of vitellogenesis or were ready for spawn, contrary to results of previous studies. Our results indicate the successful use of gonadal morphology, estradiol, and vitellogenin detection for the estimation of sexual maturity stage of female adults. © 2016, Springer-Verlag Berlin Heidelberg.
author	Lo Nostro, Fabiana Laura Ansaldo, Martín Genovese, Griselda
author_facet	Lo Nostro, Fabiana Laura Ansaldo, Martín Genovese, Griselda
author_sort	Lo Nostro, Fabiana Laura
title	Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
title_short	Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
title_full	Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
title_fullStr	Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
title_full_unstemmed	Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer
title_sort	reproductive aspects of notothenia rossii and n. coriiceps (perciformes, nototheniidae) at potter cove, 25 de mayo (king george) island during austral summer
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v40_n1_p_Ferreira http://hdl.handle.net/20.500.12110/paper_07224060_v40_n1_p_Ferreira
work_keys_str_mv	AT lonostrofabianalaura reproductiveaspectsofnototheniarossiiandncoriicepsperciformesnototheniidaeatpottercove25demayokinggeorgeislandduringaustralsummer AT ansaldomartin reproductiveaspectsofnototheniarossiiandncoriicepsperciformesnototheniidaeatpottercove25demayokinggeorgeislandduringaustralsummer AT genovesegriselda reproductiveaspectsofnototheniarossiiandncoriicepsperciformesnototheniidaeatpottercove25demayokinggeorgeislandduringaustralsummer
_version_	1768546305655701504

Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer

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