Dinâmica da maturação testicular durante o ciclo reprodutivo de Salminus hilarii (Teleostei, Characidae) em ambiente natural

Honji, Renato Massaaki; Amaral, Juliane Suzuki; Borella, Maria Inês; Batlouni, Sérgio Ricardo; Moreira, Renata Guimarães

doi:10.7594/revbio.19.01.04

Cited by 3 publications

(4 citation statements)

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“…The number of mitotic divisions observed in B. orbignyanus is similar to that described for the Characiform Astyanax lacustris (= A. altiparanae ) with approximately nine spermatogonial generations (Rodrigues et al, 2017), unlike that observed in the Characiform Hoplias malabaricus (Bizzoto & Godinho, 2007) and the Cypriniform species Danio rerio and Cyprinus carpio (Vigoya, 2016), which were estimated to have eight spermatogonial generations. It is not possible to determine whether spermatogonial generations are related to species order, indicating that this number is species‐specific (Honji et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…The reason for an increase in the number of Sertoli cells in the meiotic phase and their persistence in spermiogenesis may be related to the complexity of this phase, in which diploid germ cells undergo nuclear divisions and genetic recombination to become haploid germ cells, thus increasing the number of cells within the cyst and consequently lacking more Sertoli cells to support the cyst (Grier, 1981; Honji et al, 2020; Schulz et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…In the spermiogenic process, which originated at the end of the meiotic phase, we identified three types of spermatids in B. orbignyanus , similar to other species of teleost fish (Chagas et al, 2016; Nóbrega et al, 2009; Schulz & Nóbrega, 2011; Souto et al, 2017). Differentiation among the three cell types was based on nuclear condensation and the size of the nuclear diameter (Honji et al, 2020; Rodrigues et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

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Stereological analysis of spermatogenesis in Brycon orbignyanus (Characiformes: Bryconidae)

Benevente

Quirino

Gomes‐Silva

et al. 2022

Aquaculture Research

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Piracanjuba, Brycon orbignyanus, is an important rheophilic species for aquaculture studies on genetic diversity, spermatogenesis, semen cryopreservation and taxonomy.Due to anthropic actions its population has been declining, resulting in the loss of natural stocks, thus pushing the species to near extinction. No stereological analysis of spermatogenesis in piracanjuba has been performed. The present study aimed to evaluate spermatogenesis in B. orbignyanus using stereological analysis to quantify the number of germ cells and Sertoli cells, spermatogonial generations, spermatogenesis yield, meiotic index and the percentage of cell death. Testes of five 1-year-old B. orbignyanus specimens were collected, fixed in 2.5% glutaraldehyde and 4% paraformaldehyde and processed for light microscopy. Three types of spermatogonia were identified. Based on the number of B spermatogonia per cyst, it was estimated that spermatogonia underwent approximately nine mitotic divisions before differentiating into primary spermatocytes. Three types of spermatids were identified. In the final spermatid cyst, there were 1204 germ cells, indicating a spermatogenic yield of 58%. An increase in germ cells resulted in a subsequent increase in the number of Sertoli cells, with growth halted at the spermiogenic phase. Thus, stereological analysis of spermatogenesis is essential for better understanding of the reproductive processes in this species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Stereological analysis of spermatogenesis in Brycon orbignyanus (Characiformes: Bryconidae)

Benevente

Quirino

Gomes‐Silva

et al. 2022

Aquaculture Research

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“…The choice of the time for the process must be considered, avoiding the months of October to March, as it coincides with the period of migration and reproduction of fish, such as P. lineatus (Valenciennes, 1837) (curimbatá), Salminus hilarii (Valenciennes, 1850) (tabarana), and Brycon orbignyanus (Valenciennes, 1850) (Honji et al 2019). Antunes (2010) suggested that dredging should be carried out from the end of the rainy season to the beginning of the dry season, minimizing the effects of dredging due to the dispersion of sediments.…”

Section: Mitigating Measures and Solutionsmentioning

confidence: 99%

Dredging on water bodies and margin interventions: effects on fish

et al. 2022

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The urbanization process deeply affects rivers and streams, with numerous impacts, such as the discharge of sewers, dams, and pipework, causing profound changes in the water bodies characteristics and in their biota. In this scenario, the silting of rivers suffers one of the most impactful changes, as it undergoes a reduction in the depth and width of the rivers, triggering physical and chemical changes in the water, as well as in the structure of fish population, its feeding and reproduction habitats. As a palliative measure, it is normal to carry out the desilting (dredging) of rivers, an activity that is also very impacting. Floodings are one of the main factors that demand dredging to be carried out. This review was made to analyze desilting activities, their effects on biota and migratory fish, as well as to evaluate the best management strategies and mitigation of impacts on fish population. The shifting and removal of sediment from the riverbed can cause burial and massive death of eggs and larvae, in addition to interfering in the upward and downward migration of eggs, larvae, and adults of migratory fish. In addition, breeding and feeding sites can be impacted by sediment movement, dredging, and deposition. Some actions minimize the impacts of the silting activity recovering riparian forests, inspect the use of soil on the banks, move urban settlements away, assess the dredging site, consider the spawning sites and reduce the suspension of bottom sediments, as well as choose the best equipment and time for the performance of activities. Therefore, the development of research on the effect of dredging of water bodies on fish would contribute to a better management of the activity.

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Induced reproduction and early development in dourado,Salminus franciscanusLima & Britski, 2007 (Pisces: Characiformes)

Paschoalini

Eloi

Santos

et al. 2021

Zygote

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Summary Our study aimed to establish the response of Salminus franciscanus to hypophysation and describe the main morphological events of its embryonic process. Wild fish were captured in São Francisco River and selected broodstock (females: 66.4 ± 11.1 cm and 4.04 ± 2.32 kg; males: 58.3 ± 10.2 cm and 3.62 ± 1.12 kg) were kept at 26.1 ± 0.6°C for induction of final maturation/gamete release via the hypophysation technique. In females, two doses (0.8 and 5.6 mg/kg body weight) of crude pituitary extract of common carp (Cyprinus carpio) were administered with a 14 h interval. For males, a single dose (2.7 mg/kg body weight) of crude pituitary extract was applied at the same time as the females’ second dose. Oocytes and sperm were manually stripped 8 h after a females’ second hormonal dose. Fertilization was carried out using the dry method. Eggs were kept in funnel-type 60 L incubators at 24.3 ± 0.3°C and were analyzed and photographed every 10 min. After hormonal induction, 60% of females and 100% of males reacted positively and no broodstock mortality was recorded. The females released an average of 385.2 ± 78.4 g of oocytes and the fertilization rate observed was 50.4 ± 12.3%. The blastopore closure occurred at 7.5 h, somite formation at 12 h and hatching at 20 h post-fertilization. In general, the results of this study improve the understanding of the reproductive biology of dourado and confirm its potential for fish farming in the neotropical region.

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Dinâmica da maturação testicular durante o ciclo reprodutivo de Salminus hilarii (Teleostei, Characidae) em ambiente natural

Cited by 3 publications

References 0 publications

Stereological analysis of spermatogenesis in Brycon orbignyanus (Characiformes: Bryconidae)

Stereological analysis of spermatogenesis in Brycon orbignyanus (Characiformes: Bryconidae)

Dredging on water bodies and margin interventions: effects on fish

Induced reproduction and early development in dourado,Salminus franciscanusLima & Britski, 2007 (Pisces: Characiformes)

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