Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae)

Ribeiro, Vinicius Marques Antunes; Bazzoli, Nilo; Maria, T. A.; Santos, Gilmar B.

doi:10.1590/s1519-69842006000600002

Cited by 10 publications

(6 citation statements)

References 17 publications

(26 reference statements)

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“…Vitellogenin is manufactured in the liver from stored reserves and is translocated to the ovary where it is incorporated as yolk granules in the vitellogenic oocytes (Arukwe and Goksøyr, 2003). The variations observed in the HSI of females constitute evidence of this transference (Ribeiro et al., 2006). However, in the present work no significant differences in the HSI of A. scabripinnis were found.…”

Section: Discussionmentioning

confidence: 95%

Reproduction of the lambariAstyanax scabripinnis(Jenyns, 1842) (Pisces: Characidae) in a small stream in Southeastern Brazil

Veloso-Júnior

Guimarães-Cruz

Barros

et al. 2009

Journal of Applied Ichthyology

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The reproduction of Astyanax scabripinnis captured bimonthly in the Cristais small stream (20 o 00¢03¢S and 43 o 56¢46¢W), in the Das Velhas River basin, was studied using gross anatomical and histological techniques. Standard length of females (56 ± 8 mm) was longer than males (49 ± 6 mm). The diameter of the nucleus of the primary spermatogonia was 7.5 ± 0.9 lm and of the spermatozoon head 1.8 ± 0.4 lm. For the females, the oogonia nuclei measured 10.2 ± 2.2 lm and the vitellogenic oocyte nuclei measured 675.0 ± 66.7 lm. The following stages of the reproductive cycle were established: developing, mature, partially spent ⁄ spawned and completely spent ⁄ spawned. Maximum number of males (61.3%) and females (58.2%) at the mature stage was observed during November ⁄ December. The gonadosomatic index of males and females was highest during the mature stage (2.4 ± 0.6; 7.5 ± 1.3, respectively) and decreased in subsequent stages. In females, the hepatosomatic index was highest during the developing stage (2.8 ± 0.3), and slightly decreased in the following stages. The highest stomach repletion index found for males was observed during the partially spent stage (2.0 ± 1.2), while for the females, this index varied discretely between the reproductive stages. The highest values of FultonÕs condition factor were registered during the mature stage in both sexes (2.9 ± 0.4 for males; 3.0 ± 0.3 for females). The continuous reproductive period and the presence of partially spawned females during the entire sampling period indicated that the species has fractional spawning.

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Section: Discussionmentioning

confidence: 95%

Reproduction of the lambariAstyanax scabripinnis(Jenyns, 1842) (Pisces: Characidae) in a small stream in Southeastern Brazil

Veloso-Júnior

Guimarães-Cruz

Barros

et al. 2009

Journal of Applied Ichthyology

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“…Morphological changes in the liver may include the appearance of vacuolization of hepatocytes, glycogen depletion, alteration of capillary sinusoids, change in size of hepatocytes, and necrosis (Cengiz et al, 2001;Glover et al, 2007) which, according to some authors, may influence the synthesis of vitellogenin in the liver and the formation of vitellogenic follicles (Al-Ghais, 2013;Barni et al, 2014;Marcon et al, 2014Marcon et al, , 2015. Furthermore, hepatic physiology can be compromised differently depending on the period of exposure to pesticides, the concentration of the contaminant, and dietary habits (Ribeiro et al, 2006;Al-Ghais, 2013;Barni et al, 2014;Benze et al, 2014).…”

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confidence: 99%

Histological and Histometric Evaluation of the Liver in Astyanax Bimaculatus (Teleostei: Characidae), Exposed to Different Concentrations of an Organochlorine Insecticide

Marcon

Bazzoli

Mounteer

et al. 2015

The Anatomical Record

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To investigate possible morphological changes to the liver tissue of lambaris, Astyanax bimaculatus (Linnaeus, 1758), females were exposed to treatments of sublethal concentrations of the insecticide Thiodan V R for 96 hr. Treatments included three sublethal concentrations of 1.15, 2.3, and 5.6 lg L 21 of Thiodan V R and a control group without insecticide. The action of Thiodan V R at sublethal concentrations did not affect the morphological structure of the liver as a whole, but changes in isolated locations of the hepatic parenchyma were observed. Glycogen depletion, nuclear and cytoplasmic deformation, nuclear and cytoplasmic hypertrophy, hyperemia, and cellular degeneration in liver cells at the different concentrations studied were recorded. These observed changes in the livers were greater in groups exposed to Thiodan V R in comparison to the control group. Furthermore, there was a change in the diameter of the nuclei and cytoplasm of hepatocytes in the different treatments. The groups exposed to Thiodan V R also exhibited a larger number of hepatocyte nuclei and a reduction in the amount of cytoplasm. We conclude that for the exposure period and concentrations of Thiodan V R analyzed, the morphology of hepatic tissue had a cellular adaptive response.

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“…No entanto, no estudo de Taranger et al (2006) machos e fêmeas de bacalhau do Atlântico (Gadus morhua) sob regime de luz contínua (LL) apresentaram maiores valores de IHS em relação ao regime de luz natural (LN), indicando que o grupo de LL investiu menos energia para a reprodução. Ribeiro et al (2006) também constataram em Steindachnerina (Characiforme: Curimatidae) diferenças no IHS, que diminuiu da fase de repouso para a fase de maturação.…”

Section: Resultsunclassified

Efeito Do Fotoperíodo No Crescimento, Consumo Alimentar E Qualidade Da Carcaça De Tilápias Invertidas

Navarro

Ferreira

Navarro

2016

ArqVet

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FERREIRA, T. M. S.; NAVARRO, F. K. S. P. Efeito do fotoperíodo no crescimento, consumo alimentar e qualidade da carcaça de tilápias invertidas. Arq. Ciênc. Vet. Zool. UNIPAR, Umuarama, v. 19, n. 2, p. 77-80, abr./jun. 2016. RESUMO:A incidência luminosa pode induzir diversos efeitos sobre o crescimento, alimentação, desenvolvimento e reprodução de peixes. O fotoperíodo é sinal principal para maior influência sobre o ritmo circadiano dos peixes e pode afetar o ganho de peso, a ingestão de alimento e a utilização de energia. O objetivo deste trabalho foi avaliar os efeitos de diferentes regimes de fotoperíodo no crescimento, consumo alimentar e qualidade da carcaça de tilápias invertidas, em um sistema fechado. Foram utilizados 150 alevinos de tilápias invertidas, provenientes da estação de piscicultura. Os peixes foram acondicionados e distribuídos em 15 aquários com a capacidade de 65 litros cada um, em delineamento inteiramente ao acaso, com três tratamentos e cinco repetições. Os tratamentos diferenciarão nas simulações dos fotoperíodos emerais (horas de luz) que durarão T1= 24 horas de escuro, T2= 12 horas de escuro e 12 horas de Luz, T3= 24 horas de luz. Cada peixe foi considerado uma unidade experimental. Não houve diferença significativa para desempenho, mas houve diferença para Índice gonadossomático (IGS). Conclui-se que o fotoperíodo (12L:12E) promove melhor índice gonadossomático em tilápia. Para melhor qualidade de carcaça e desempenho produtivo sugere o fotoperíodo (24L:0E). PALAVRA-CHAVE: Escuro. Fotoperiodo. Oreochomis niloticus. Ritmo biológico. PHOTOPERIOD EFFECT ON GROWTH, FEED INTAKE AND CARCASS QUALITY REVERSED TILAPIAABSTRACT: The light incidence can induce different effects on growth, feeding and development and reproduction of fish. The photoperiod is the main signal for greater influence on the circadian rhythm of the fish and can affect weight gain, feed intake and energy use. This study aimed to demonstrate the effects of different photoperiodic regimes on growth, feed intake and carcass tilapia quality reversed in a closed system. 150 were used fry reversed tilapia, from fish farming station. The fish were packed and distributed in 15 tanks with a capacity of 65 liters each, in a completely randomized design with three treatments and five repetitions. Treatments differentiate in the simulations of emerais photoperiod (light hours) that will last T1 = 24 hours dark, T2 = 12 hours of darkness and 12 hours light, T3 = 24 hours of light. Each fish was considered an experimental unit. There was no significant difference in performance, but there were differences for IGS. I conclude that the photoperiod (12L: 12D) promotes better GSI in tilapia. To better carcass quality and growth performance suggests the photoperiod (24L: 0D). KEYWORDS: Biological rhythm. Dark. Oreochomis niloticus. Photoperiod. EFECTO DE FOTOPERIODO EN EL CRECIMIENTO, CONSUMO ALIMENTAR Y CALIDAD DE CAPARAZÓN DE TILAPIAS INVERTIDASRESUMEN: La incidencia de luz puede inducir diversos efectos sobre el crecimiento, alimentación...

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Ultrastructural changes in female hepatocytes during ovarian maturation of Steindachnerina insculpta (Pisces: Curimatidae)

Cited by 10 publications

References 17 publications

Reproduction of the lambariAstyanax scabripinnis(Jenyns, 1842) (Pisces: Characidae) in a small stream in Southeastern Brazil

Reproduction of the lambariAstyanax scabripinnis(Jenyns, 1842) (Pisces: Characidae) in a small stream in Southeastern Brazil

Histological and Histometric Evaluation of the Liver in Astyanax Bimaculatus (Teleostei: Characidae), Exposed to Different Concentrations of an Organochlorine Insecticide

Efeito Do Fotoperíodo No Crescimento, Consumo Alimentar E Qualidade Da Carcaça De Tilápias Invertidas

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