The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture

Detalhes bibliográficos
Autor(a) principal: Mello, Paulo H. de [UNESP]
Data de Publicação: 2021
Outros Autores: Lancerotto, Stefano, Fakriadis, Ioannis, Tsoukali, Panagiota, Papadaki, Maria, Mylonas, Constantinos C.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.12681/mms.25806
http://hdl.handle.net/11449/210186
Resumo: We examined the effect of constant water temperature throughout the year on gametogenesis, spawning success and egg/sperm/embryo quality in meagre (Argyrosomus regius). Two broodstocks were exposed to simulated natural photoperiod, and either attenuated seasonal water temperature (SeasT, 16.4 to 19.6 degrees C) or relatively constant water temperature (CoT, 19.4 +/- 0.6 degrees C). In the spawning period (May), 4 couples per group were induced to spawn with gonadotropin releasing hormone agonist (GnRHa). Gonadal stage of development, sperm quality parameters and plasma levels of sex steroids were evaluated prior to the GnRHa treatment. Spawning success and egg/sperm quality were examined over the following 4 weeks. Constant temperature did not prevent gametogenesis, but exposure to attenuated seasonal water temperature with the inclusion of winter low temperature was beneficial to both sexes. The mean (+/- SD) diameter of the largest vitellogenic oocytes prior to GnRHa administration was significantly higher in the SeasT compared to the CoT group (598 +/- 27 vs 520 +/- 17 mu m). Testosterone plasma levels in the females were significantly higher in the SeasT group, but all other hormones were similar in both sexes. SeasT females spawned more consistently with higher relative fecundity, and 24-h embryo survival of the produced eggs. A more pronounced negative effect of constant water temperature was observed in males, since CoT males exhibited a spermiation index of 0 prior to GnRHa treatment, the latter clearly having a beneficial effect over the following 4 weeks. The study demonstrated that meagre do undergo gametogenesis to a significant extent even under constant water temperatures during the year. However, a seasonal thermal regime -even an attenuated one- was necessary for the proper development of the gametes, allowing for the successful spawning induction using the established GnRHa induction protocol.
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spelling The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquacultureArgyrosomus regiusGnRHaspawningtemperaturegametogenesissperm qualityWe examined the effect of constant water temperature throughout the year on gametogenesis, spawning success and egg/sperm/embryo quality in meagre (Argyrosomus regius). Two broodstocks were exposed to simulated natural photoperiod, and either attenuated seasonal water temperature (SeasT, 16.4 to 19.6 degrees C) or relatively constant water temperature (CoT, 19.4 +/- 0.6 degrees C). In the spawning period (May), 4 couples per group were induced to spawn with gonadotropin releasing hormone agonist (GnRHa). Gonadal stage of development, sperm quality parameters and plasma levels of sex steroids were evaluated prior to the GnRHa treatment. Spawning success and egg/sperm quality were examined over the following 4 weeks. Constant temperature did not prevent gametogenesis, but exposure to attenuated seasonal water temperature with the inclusion of winter low temperature was beneficial to both sexes. The mean (+/- SD) diameter of the largest vitellogenic oocytes prior to GnRHa administration was significantly higher in the SeasT compared to the CoT group (598 +/- 27 vs 520 +/- 17 mu m). Testosterone plasma levels in the females were significantly higher in the SeasT group, but all other hormones were similar in both sexes. SeasT females spawned more consistently with higher relative fecundity, and 24-h embryo survival of the produced eggs. A more pronounced negative effect of constant water temperature was observed in males, since CoT males exhibited a spermiation index of 0 prior to GnRHa treatment, the latter clearly having a beneficial effect over the following 4 weeks. The study demonstrated that meagre do undergo gametogenesis to a significant extent even under constant water temperatures during the year. However, a seasonal thermal regime -even an attenuated one- was necessary for the proper development of the gametes, allowing for the successful spawning induction using the established GnRHa induction protocol.project NewTechAqua (European Unions Programme H2020)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Hellen Ctr Marine Res, Inst Marine Biol Biotechnol & Aquaculture, Iraklion, Crete, GreeceSao Paulo State Univ, Aquaculture Ctr, Jaboticabal, SP, BrazilUniv Crete, Dept Biol, Iraklion, Crete, GreeceSao Paulo State Univ, Aquaculture Ctr, Jaboticabal, SP, Brazilproject NewTechAqua (European Unions Programme H2020): GA 862658FAPESP: FAPESP - 2019/05290-3Natl Centre Marine ResearchHellen Ctr Marine ResUniversidade Estadual Paulista (Unesp)Univ CreteMello, Paulo H. de [UNESP]Lancerotto, StefanoFakriadis, IoannisTsoukali, PanagiotaPapadaki, MariaMylonas, Constantinos C.2021-06-25T15:00:40Z2021-06-25T15:00:40Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article218-231http://dx.doi.org/10.12681/mms.25806Mediterranean Marine Science. Hellinikon: Natl Centre Marine Research, v. 22, n. 2, p. 218-231, 2021.1108-393Xhttp://hdl.handle.net/11449/21018610.12681/mms.25806WOS:000636430200001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMediterranean Marine Scienceinfo:eu-repo/semantics/openAccess2024-04-09T15:10:46Zoai:repositorio.unesp.br:11449/210186Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:09:49.477641Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
title The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
spellingShingle The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
Mello, Paulo H. de [UNESP]
Argyrosomus regius
GnRHa
spawning
temperature
gametogenesis
sperm quality
title_short The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
title_full The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
title_fullStr The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
title_full_unstemmed The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
title_sort The importance of thermoperiod for proper gametogenesis and successful egg and sperm production in meagre (Argyrosomus regius) breeders in aquaculture
author Mello, Paulo H. de [UNESP]
author_facet Mello, Paulo H. de [UNESP]
Lancerotto, Stefano
Fakriadis, Ioannis
Tsoukali, Panagiota
Papadaki, Maria
Mylonas, Constantinos C.
author_role author
author2 Lancerotto, Stefano
Fakriadis, Ioannis
Tsoukali, Panagiota
Papadaki, Maria
Mylonas, Constantinos C.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Hellen Ctr Marine Res
Universidade Estadual Paulista (Unesp)
Univ Crete
dc.contributor.author.fl_str_mv Mello, Paulo H. de [UNESP]
Lancerotto, Stefano
Fakriadis, Ioannis
Tsoukali, Panagiota
Papadaki, Maria
Mylonas, Constantinos C.
dc.subject.por.fl_str_mv Argyrosomus regius
GnRHa
spawning
temperature
gametogenesis
sperm quality
topic Argyrosomus regius
GnRHa
spawning
temperature
gametogenesis
sperm quality
description We examined the effect of constant water temperature throughout the year on gametogenesis, spawning success and egg/sperm/embryo quality in meagre (Argyrosomus regius). Two broodstocks were exposed to simulated natural photoperiod, and either attenuated seasonal water temperature (SeasT, 16.4 to 19.6 degrees C) or relatively constant water temperature (CoT, 19.4 +/- 0.6 degrees C). In the spawning period (May), 4 couples per group were induced to spawn with gonadotropin releasing hormone agonist (GnRHa). Gonadal stage of development, sperm quality parameters and plasma levels of sex steroids were evaluated prior to the GnRHa treatment. Spawning success and egg/sperm quality were examined over the following 4 weeks. Constant temperature did not prevent gametogenesis, but exposure to attenuated seasonal water temperature with the inclusion of winter low temperature was beneficial to both sexes. The mean (+/- SD) diameter of the largest vitellogenic oocytes prior to GnRHa administration was significantly higher in the SeasT compared to the CoT group (598 +/- 27 vs 520 +/- 17 mu m). Testosterone plasma levels in the females were significantly higher in the SeasT group, but all other hormones were similar in both sexes. SeasT females spawned more consistently with higher relative fecundity, and 24-h embryo survival of the produced eggs. A more pronounced negative effect of constant water temperature was observed in males, since CoT males exhibited a spermiation index of 0 prior to GnRHa treatment, the latter clearly having a beneficial effect over the following 4 weeks. The study demonstrated that meagre do undergo gametogenesis to a significant extent even under constant water temperatures during the year. However, a seasonal thermal regime -even an attenuated one- was necessary for the proper development of the gametes, allowing for the successful spawning induction using the established GnRHa induction protocol.
publishDate 2021
dc.date.none.fl_str_mv 2021-06-25T15:00:40Z
2021-06-25T15:00:40Z
2021-01-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.12681/mms.25806
Mediterranean Marine Science. Hellinikon: Natl Centre Marine Research, v. 22, n. 2, p. 218-231, 2021.
1108-393X
http://hdl.handle.net/11449/210186
10.12681/mms.25806
WOS:000636430200001
url http://dx.doi.org/10.12681/mms.25806
http://hdl.handle.net/11449/210186
identifier_str_mv Mediterranean Marine Science. Hellinikon: Natl Centre Marine Research, v. 22, n. 2, p. 218-231, 2021.
1108-393X
10.12681/mms.25806
WOS:000636430200001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Mediterranean Marine Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 218-231
dc.publisher.none.fl_str_mv Natl Centre Marine Research
publisher.none.fl_str_mv Natl Centre Marine Research
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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