Development of secondary sexual characters and their relationship to ontogeny and seasonal reproductive period in <i>Hyphessobrycon igneus</i> (Ostariophysi: Characiformes)

Longoni, Lucas Schönhofen; Giora, Julia; Fialho, Clarice Bernhardt

doi:10.1111/jfb.13499

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…The male and female germ cells allowed the characterization of gonadal development phases according to the proposal of Brown-Peterson et al (2011), which was adopted in the upper Paraná River floodplain in the study of the reproduction of other invaders Serrasalmus marginatus (Melo, Santana, & Dei Tos, 2017), Loricariichthys platymetopon (Cardim, Pereira, Santana, & Dei Tos, 2019) and Auchenipterus osteomystax (Dei Tos et al, 2021). This scale has been adopted for investigations of freshwater fish reproduction in Brazil since 2013 for Hoplias malabaricus and Sorubim lima (Quagio-Grassiotto et al, 2013), Pimelodus maculatus and Serrasalmus maculatus (Wildner, Grier, & Quagio-Grassiotto, 2013), and more recently for Hyphessobrycon igneus (Longoni, Giora, & Fialho, 2018), Devario aequipinnatus (Jesus-Silva, Oliveira, Ribeiro, Ninhaus-Silveira, & Veríssimo-Silveira, 2018) Astyanax aff. bimaculatus (Araújo, Nascimento, Gomes, Sales, & Oliveira, 2019) and Rhamdia quelen (Mazzoni, Bombardelli, & Quagio-Grassiotto, 2020).…”

Section: Discussionmentioning

confidence: 99%

Reproduction and fecundity of invader of internal insemination Trachelyopterus galeatus in a Neotropical floodplain

Schmidt

Pereira

Antunes

et al. 2021

Acta Sci. Biol. Sci.

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After the formation of Itaipu Reservoir, the invader Trachelyopterus galeatus colonized the upper Paraná River. Light microscopy was used to describe gametogenesis and the reproductive phases of females and males. The following data were verified: diameter of the oocytes, spawning type, batch fecundity by ovary weight, standard length, and total weight of the fish, along with the regions where this species reproduced in the upper Paraná River floodplain. A total of 470 specimens were collected quarterly in 2016, 2018 and 2019, and bimonthly in 2017. The gonads were fixed in a Karnovsky solution, dehydrated, infiltrated, and embedded in historesin. The histological slides were stained using PAS + iron hematoxylin + metanil yellow, analyzed and photographed under an image-capturing microscope. As regards diameter of the oocytes and fecundity estimates, ovaries whose oocytes were measured under a stereomicroscope were sampled. In the oogenesis, undifferentiated and differentiated oogonia, early primary growth oocytes, secondary growth oocytes, full-grown oocytes and maturing oocytes were recorded. In the spermatogenesis, primary and secondary spermatogonia, primary and secondary spermatocytes, spermatids and spermatozoa were recorded. The reproductive phases found for females and males were: immature, early development, late development, spawning/sperm-releasing capable, regression, and regeneration. Trachelyopterus galeatus prefers to occupy and reproduce in the Ventura, Patos, Guaraná, Fechada, Garças, and Pau Véio lagoons. The diameter of the oocytes varied from 0.4 to 2.9 mm. Females spawn, on average, 113 oocytes per batch. Batch fecundity variation shows that the larger the ovary, standard length, and total weight, the larger the number of oocytes to be spawned. This invader possesses reproductive success in the upper Paraná River floodplain, especially in lagoons.

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Section: Discussionmentioning

confidence: 99%

Reproduction and fecundity of invader of internal insemination Trachelyopterus galeatus in a Neotropical floodplain

Schmidt

Pereira

Antunes

et al. 2021

Acta Sci. Biol. Sci.

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“…Meanwhile, the development of ICPP shows an intimate association with the levels of vitamin-D, sex hormones, insulin-like growth factor-1 (IGF-1), leptin, etc. 9 Gonadotropin-releasing hormone (GnRH) stimulation test has been accepted to be the gold standard for diagnosing ICPP so far, 10 which is also extensively employed to assist in the differential diagnosis of precocious puberty in children. In this study, the time point of conversion from PT to ICPP was discussed by monitoring the levels of vitamin-D, sex hormone, IGF-1 and leptin, as well as uterine and ovarian volumes in children.…”

Section: Introductionmentioning

confidence: 99%

The clinical value of serum-related indexes in differentiating simple premature thelarche from idiopathic central precocious puberty

Cui,

Liu,

Liu

et al. 2023

Pak J Med Sci

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Objective: To explore the changes of serum-related indexes at different time points, so as to identify the critical time of converting from simple premature thelarche (PT) to idiopathic central precocious puberty (ICPP). Methods: This is a retrospective study. The subjects of the study were 50 girls with PT who were admitted to the Children’s Hospital of Hebei Province from January 2019 to September 2020. The enrolled 50 children were divided into the conversion group(n=12) and the non-conversion group(n=38) according to whether PT was converted into ICPP during follow-up. Furthermore, the levels of serum-related indexes and uterine and ovarian volumes were compared after the diagnosis of PT. Results: The IGF-1 and IGFBP-3 levels of children in the conversion group began to change significantly from six months after the diagnosis, with statistically significant differences when compared with the levels of children at the initial diagnosis, three months and those of the non-conversion group at the same time points (p<0.05). The levels of vitamin-D, DHEA and leptin began to change significantly at nine months after the diagnosis (p<0.05). Besides, uterine and ovarian volumes in the conversion group began to increase significantly six months after the diagnosis, with statistically significant differences when compared with those in the non-conversion group (p<0.05). Conclusion: Findings in our study suggest that regular monitoring of vitamin-D, IGF-1, IGFBP-3, DHEA and leptin levels, and uterine and ovarian volumes can predict the conversion from PT to ICPP at an early stage. doi: https://doi.org/10.12669/pjms.40.3.7447 How to cite this: Cui H, Liu P, Liu X, Du W, Wang X. The clinical value of serum-related indexes in differentiating simple premature thelarche from idiopathic central precocious puberty. Pak J Med Sci. 2024;40(3):---------. doi: https://doi.org/10.12669/pjms.40.3.7447 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Gonadal development period and sexual differentiation through histological analysis in Brycon orbignyanus (Valenciennes, 1850) (Characiformes: Bryconidae)

et al. 2021

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Development of secondary sexual characters and their relationship to ontogeny and seasonal reproductive period in Hyphessobrycon igneus (Ostariophysi: Characiformes)

Cited by 6 publications

References 36 publications

Reproduction and fecundity of invader of internal insemination Trachelyopterus galeatus in a Neotropical floodplain

Reproduction and fecundity of invader of internal insemination Trachelyopterus galeatus in a Neotropical floodplain

The clinical value of serum-related indexes in differentiating simple premature thelarche from idiopathic central precocious puberty

Gonadal development period and sexual differentiation through histological analysis in Brycon orbignyanus (Valenciennes, 1850) (Characiformes: Bryconidae)

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