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: Ferreira, M.F., Varela, M.L., Lo Nostro, F., Ansaldo, M., Genovese, G.
Formato: JOUR
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: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
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spelling todo:paper_07224060_v40_n1_p_Ferreira2023-10-03T15:37:10Z Reproductive aspects of Notothenia rossii and N. coriiceps (Perciformes, Nototheniidae) at Potter Cove, 25 de Mayo (King George) Island during austral summer Ferreira, M.F. Varela, M.L. Lo Nostro, F. Ansaldo, M. Genovese, G. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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
Ferreira, M.F.
Varela, M.L.
Lo Nostro, F.
Ansaldo, M.
Genovese, G.
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.
format JOUR
author Ferreira, M.F.
Varela, M.L.
Lo Nostro, F.
Ansaldo, M.
Genovese, G.
author_facet Ferreira, M.F.
Varela, M.L.
Lo Nostro, F.
Ansaldo, M.
Genovese, G.
author_sort Ferreira, M.F.
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
url http://hdl.handle.net/20.500.12110/paper_07224060_v40_n1_p_Ferreira
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