Controle do eixo hipotálamo-hipófise-gônadas do surubim do Paraíba Steindachneridion parahybae (Siluriformes:Pimelodidae) em relação ao ciclo reprodutivo e à reprodução induzida em cativeiro

Honji, Renato Massaaki

doi:10.11606/t.41.2011.tde-18012012-112928

Cited by 7 publications

(18 citation statements)

References 182 publications

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“…Macroscopic and microscopic analysis of the gonads of S. parahybae may help explain the small quantity of eggs released. The pattern of oocyte development seems to be multiple-batch groupsynchronous (Rocha & Rocha, 2006) during the reproductive season (Honji, 2011), a reproductive strategy also suggested for another Pimelodidae, P. corruscans (Godinho et al, 2007), a species commonly known as single spawners for most authors so far (Bazzoli, 2003;Sato & Godinho 2003;Campos, 2005).…”

Section: Discussionmentioning

confidence: 83%

“…The small quantity of eggs released during the artificial induction of S. parahybae can reflect the gonadossomatic index values, which increased during the final gonadal maturation and were similar after the hormonal induction of domesticated broodstock (Honji, 2011). Macroscopic and microscopic analysis of the gonads of S. parahybae may help explain the small quantity of eggs released.…”

Section: Discussionmentioning

confidence: 94%

“…Similarly, conservation efforts in the field could be more successful if corroborated by captivity studies. Therefore, study of the development of various fish species in captivity is one of the first steps in helping conservation biologists rescue endangered species, such as, many Pimelodidae: Steindachneridion parahybae (Honji, 2011), S. melanodermatum (Feiden et al, 2006), S. scripta (Adamante et al, 2007), S. scriptum (Schütz et al, 2008), Rhamdia quelen (Soso et al, 2007), Pseudoplatystoma corruscans, and Lophiosilurus alexandri (Santos & Luz, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

et al. 2012

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Steindachneridion parahybae is a freshwater catfish endemic to the Paraíba do Sul River and is classified as an endangered Neotropical species. An increasing number of conservation biologists are incorporating morphological and physiological research data to help conservation managers in rescue these endangered species. This study investigated the embryonic and larval development of S. parahybae in captivity, with emphasis in major events during the ontogeny of S. parahybae. Broodstocks were artificially induced to reproduce, and the extrusion occurred 200-255 degree-hours after hormonal induction at 24°C. Larval ontogeny was evaluated every 10 minutes under microscopic/stereomicroscopic using fresh eggs samples. The main embryogenic development stages were identified: zygote, cleavage, including the morula, blastula, gastrula phase, organogenesis, and hatching. The extruded oocytes showed an average diameter of 1.10 ± 0.10 mm, and after fertilization and hydration of eggs, the average diameter of eggs increased to about 1.90 ± 0.60 mm, characterized by a large perivitelline space that persisted up to embryo development, the double chorion, and the poles (animal and vegetative). Cell division started about 2 minutes after fertilization (AF), resulting in 2, 4, 8 (4 x 2 arrangement of cells), 16 (4 x 4), 32 (4 x 8) and 64 (2 x 4 x 8) cells. Furthermore, the blastula and gastrula stages followed after these cells divisions. The closed blastopore occurred at 11 h 20 min AF; following the development, the organogenetic stages were identified and subdivided respectively in: early segmentation phase and late segmentation phase. In the early segmentation phase, there was the establishment of the embryonic axis, and it was possible to distinguish between the cephalic and caudal regions; somites, and the optic vesicles developed about 20 h AF. Total hatching occurred at 54 h AF, and the larvae average length was 4.30 ± 0.70 mm. Gradual yolk sac reduction was observed during the first two days of larval development. The first feeding occurred at the end of the second day. During the larval phase, cannibalism, heterogeneous larval growth and photophobia were also observed. This information will be important in improving the artificial reproduction protocols of S. parahybae in controlled breeding programs.Steindachneridion parahybae é um bagre de água doce, endêmico do rio Paraíba do Sul e é classificado como espécie neotropical ameaçada. Um número crescente de biólogos conservacionistas estão incorporando dados de pesquisas morfológicas e fisiológicas para ajudar os gestores de conservação no resgate destas espécies ameaçadas de extinção. Este estudo investigou o desenvolvimento embrionário e larval de S. parahybae em cativeiro, com ênfase nos principais eventos durante a ontogenia de S. parahybae. Reprodutores foram artificialmente induzidos à reprodução e a extrusão ocorreu com 200-255 horas-graus após a indução hormonal a 24°C. A ontogenia larval foi avaliada a cada 10 minutos sob microscópio/ estereomicroscópio, utiliz...

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

et al. 2012

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“…Then, they were randomly divided into two ponds (200 m 2 ) (duplicate) with concrete walls and a sandy bottom. During the experiment, the broodstocks were fed with commercial extruded feed for carnivorous fish containing 40% of crude protein at a rate of 2% biomass/day, offered twice a day (according to CESP fish farm routine), at 08:00 and 16:00h, following previously studies (Honji, 2011;Honji et al, 2012Honji et al, , 2013Honji et al, , 2016. During the experiment, the water temperature was 21.10 ± 0.14 ºC and the dissolved oxygen was 7.58 ± 0.36 mg/L, without significant variation between tanks.…”

Section: Methodsmentioning

confidence: 99%

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

et al. 2018

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This study aimed at analyzing the energetic substrate (ES) in the main storage tissues of Steindachneridion parahybae, throughout the reproductive cycle in captivity. Differently from wild, in captivity, feeding is not interrupted during the reproductive period, the females do not spawn spontaneously, and they are sedentary. Adult females were sampled monthly and based on their histology and gonadosomatic index (GSI), ovaries were classified into: previtellogenic (PRV), vitellogenic (VTG), and regression (REG) stages. Ovaries at the VTG stage showed higher protein and lipids levels than at the PRV stage with a positive correlation between these substrates and the GSI. Muscle was the main source of proteins transferred to the ovaries, according to the negative correlation between these organs. Lipids remained unchanged in the liver, which is an important supplier in vitellogenesis, a pattern that probably occurs due to the continuous feeding. Muscular glycogen levels were higher at the VTG and REG than at the PRV stages. Plasma triglycerides were also higher during REG, while glucose levels were more elevated during the VTG stage. These results suggest that with constant food supply, the pattern of deposition of ES in S. parahybae is different from that described for other wild potamodromous species.Keywords: Glycogen, Lipids, Metabolic substrate, Protein, Reproductive cycle.O objetivo deste estudo foi analisar a composição do substrato energético (SE) nos principais tecidos de armazenamento de Steindachneridion parahybae, durante todo o ciclo reprodutivo em cativeiro. Diferentemente do ambiente natural, em cativeiro, a alimentação desses animais não é interrompida durante o período reprodutivo, as fêmeas não desovam espontaneamente, e são sedentárias. Fêmeas adultas foram amostradas mensalmente e baseada na histologia e no índice gonadossomático (IGS), os ovários foram classificados: estádios pré-vitelogênico (PRV), vitelogênico (VTG) e regressão (REG). Os ovários no estádio VTG apresentaram uma maior concentração de lipídeos e proteínas em relação ao estágio PRV. Esses substratos correlacionaram-se positivamente com o IGS. O músculo foi a principal fonte de proteína transferida aos ovários, como foi confirmado pela análise de correlação negativa entre esses órgãos. Os lipídeos mantiveram-se inalterados no fígado, considerado um importante órgão fornecedor de lipídeos para a vitelogênese, padrão que possivelmente ocorreu devido à contínua alimentação. A concentração do glicogênio muscular foi mais elevada durante os estágios VTG e REG em relação ao PRV. A concentração de triglicerídeos plasmática apresentou maiores valores no estádio REG enquanto a concentração de glicose no plasma foi maior durante os estádios VTG. Esses resultados sugerem que com alimentação constante, as fêmeas de S. parahybae apresentam um distinto padrão de mobilização dos substratos energéticos em relação ao que já foi descrito para outras espécies potamódromas de ambiente natural. Palavras-chaves:Ciclo reprodutivo, Glicogênio, Lipídeos, P...

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“…Estudos de Caneppele et al (2009) e Honji et al (2013, estabeleceram o protocolo de indução artificial à reprodução de S. parahybae em cativeiro (respectivamente, de reprodutores selvagens e de origem de cativeiro (F1)); desenvolvimento embrionário e larval (Honji et al, 2012a;Lopes et al, 2015), e a qualidade dos gametas de S. parahybae tem sido descrito também (Honji, 2011;Sanches et al, 2013Sanches et al, , 2014Sanches et al, , 2015Caneppele et al, 2015;Okawara et al, 2015). A reprodução dessa espécie em cativeiro ocorre entre novembro e março, apresentando desenvolvimento oocitá-rio sincrônico, no entanto, durante o período reprodutivo apresenta uma desova em diferentes grupos, ou seja, entre os meses de novembro e março, as fêmeas de S. parahybae podem desovar várias vezes durante o período reprodutivo (Honji, 2011). Ainda neste sentido, S. parahybae não pode ser caracterizado como uma espécie com determinação sexual por temperatura, no entanto, estudos preliminares indicam que a temperatura pode influenciar a determinação e diferenciação sexual de S. parahybae (Honji et al, 2014).…”

Section: Biologia Básica E Aplicadaunclassified

Biodiversidade e conservação da ictiofauna ameaçada de extinção da bacia do rio Paraíba do Sul

Honji¹,

Tolussi²,

Caneppele³

et al. 2017

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# Estes autores contribuíram igualmente para a realização deste trabalhoAbstract. The Paraíba do Sul river basin is the second largest basin of Brazilian east spreading over the São Paulo, Rio de Janeiro and Minas Gerais states, however the anthropic actions are contributing for the process of extinction of endemic species. Therefore, the Instituto Chico Mendes de Conservação de Biodiversidade with other institutions elaborated a National Action Plan (PAN) of Paraíba do Sul, which aimed to preserve these threatened species. In this review, we assembled the recent advances of studies of basic and applied biology of five threatened teleost fish. Beyond the biological data also gathered the main threats, conservation strategies and the possible presence of these species in conservation units. Then, the PAN has been achieving important outcomes showing that the maintenance of the study, especially on the knowledge of the target species is essential to successfully maintain these animals in the basin.

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Controle do eixo hipotálamo-hipófise-gônadas do surubim do Paraíba Steindachneridion parahybae (Siluriformes:Pimelodidae) em relação ao ciclo reprodutivo e à reprodução induzida em cativeiro

Cited by 7 publications

References 182 publications

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

Embryonic development and larval stages of Steindachneridion parahybae (Siluriformes: Pimelodidae): implications for the conservation and rearing of this endangered Neotropical species

Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

Biodiversidade e conservação da ictiofauna ameaçada de extinção da bacia do rio Paraíba do Sul

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