Biologia reprodutiva e reprodução induzida de duas espécies de Characidae (Osteichthyes, Characiformes) da bacia do São Francisco, Minas Gerais, Brasil

Sato, Yoshimi; Sampaio, Édson Vieira; Fenerich-Verani, Nelsy; Verani, José Roberto

doi:10.1590/s0101-81752006000100021

Cited by 49 publications

(61 citation statements)

References 5 publications

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“…During the experimental period, the mean values of temperature 28.67±0.73 o C, pH 6.65±0.68, and dissolved oxygen 5.23±0.85 mg L -1 were within the range considered acceptable for fish growth, according to Sato et al (2006).…”

Section: Resultsmentioning

confidence: 85%

“…This kind of fish accepts artificial feeding with ease, and has good potential for aquaculture. Its commercial importance is relevant as baits in sport fishing, appetizer and as ornamental fish (Sato et al, 2006). Lambari is omnivorous, and can reach 10.9 cm and 42 g. Depending on environmental conditions, lambari´s spawning can be whole or split (Sato et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Its commercial importance is relevant as baits in sport fishing, appetizer and as ornamental fish (Sato et al, 2006). Lambari is omnivorous, and can reach 10.9 cm and 42 g. Depending on environmental conditions, lambari´s spawning can be whole or split (Sato et al, 2006). Further research is necessary to better understand the stimulation process of gonadal maturation and spawning, as well as to improve the quality of gametes, to promote the development of fish farming based on native species in Brazil.…”

Section: Introductionmentioning

confidence: 99%

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Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods

Keley

Pereira

Navarro

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the effect of photoperiod on luteinizing hormone (LH) plasma levels and gonadal maturation of lambari females. One hundred and twenty adult lambaris, distributed into 12 aquaria of 20 L each, were randomly subjected to three different treatments, in a completely randomized design, and four replicates. Treatments were photoperiods in hours of light (L) and darkness (D): T1, 0 L:24 D; T2, 12 L:12 D; T3, 24 L:0 D. After 40 days, fish were subjected to fasting for 24 hours and, then, anesthetized. Immediately after slaughter, fish were weighed, and their gonads and livers were removed and weighed. Ovaries were weighed and immersed in Bouin's fixative solution for 24 hours and, then, kept in 70% alcohol until processing the material. Subsequently, the oocyte developmental stage was determined. No significant differences were observed between treatments for final weight, ovary weight, gonadosomatic index (GSI), hepatosomatic index (HSI) and LH levels. In all treatments, lambari females showed maturing ovaries with prevalence of vitellogenic oocytes. Photoperiod does not affect the LH levels and ovarian maturation in lambari females.Index terms: Astyanax bimaculatus, native species, gonadosomatic index, hepatosomatic index, oogenesis. Níveis plasmáticos de hormônio luteinizante e maturação gonadal de fêmeas de lambari sob diferentes fotoperíodos

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Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods

Keley

Pereira

Navarro

et al. 2013

Pesq. agropec. bras.

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“…The highest correlation was found between fecundity and gonad mass in the headwaters and between fecundity and body length in the flood area. Several studies have identified a positive relationship between the number of oocytes and fish size (Adite et al, 2006;Brickle et al, 2005;Magalhães et al, 2003;Mazzoni & Silva, 2006;Moffett et al, 2006;Sato et al, 2006;Tarkan, 2006;Martins-Queiroz et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

Costa

Mateus

2009

Neotrop. ichthyol.

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The purpose of this study was to analyze the reproductive strategy and life-history traits involved in the reproductive processes of P. mesopotamicus in two regions of the Cuiabá River basin, the first of these encompassing its headwaters (Cuiabazinho River -Rosário Oeste) and the other the flood area of the Cuiabá River (Porto Cercado -Poconé). A total of 391 individuals were sampled monthly from August 2006 to July 2007, 159 from the headwaters and 232 from the flood area. The size structure indicated that the females in the headwaters attain longer lengths than the males, while no differences in length were found in the flood area. Females predominated in the headwaters, while males outnumbered females in the flood area. The reproductive period in the headwaters extended from October to March, but was restricted to October and November in the flood area. Feeding activity showed significant differences in both sexes between the stages of gonadal maturation, with the highest values recorded in stages of gonadal inactivity. The length at first maturity was 34.89 cm and the length at which all specimens were ready for reproduction was 44 cm at both sampling sites. The spawning type was total and fecundity was positively correlated to the size of the female.O presente estudo teve como objetivo analisar a estratégia reprodutiva e os traços de história de vida relacionados aos processos reprodutivos de P. mesopotamicus em duas regiões da bacia do rio Cuiabá: uma que representa a região das cabeceiras (rio Cuiabazinho -Rosário Oeste) e outra que abrange a área de inundação do rio Cuiabá (Porto Cercado -Poconé). Indivíduos foram amostrados, mensalmente, no período de agosto de 2006 a julho de 2007. Foram amostrados 391 indivíduos, sendo 159 de ambiente de cabeceira e 232 de área alagada. A estrutura de tamanho mostrou que em ambiente de cabeceira as fêmeas atingem comprimentos maiores que os machos, enquanto que em área alagada não houve diferença nos comprimentos. Ocorreu predomínio de fêmeas em ambiente de cabeceira, e de machos em área alagada. O período reprodutivo para o ambiente de cabeceira estendeu-se de outubro a março e para a área alagada foi restrito a outubro e novembro. A atividade alimentar apresentou diferenças significativas para ambos os sexos entre os estádios de maturação gonadal com os maiores valores encontrados em estádios de inatividade gonadal. O comprimento de primeira maturação foi de 34,89 cm e o comprimento em que todos estão aptos a reproduzirem foi de 44 cm para ambos os locais. O tipo de desova é total e a fecundidade foi positivamente relacionada ao tamanho da fêmea.

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“…Esta espécie, de pequeno porte, aceita alimentação artificial com bastante facilidade e apresenta bom potencial para a aqüicultura, podendo ser utilizados como iscas em pesca esportivas, como petiscos e como peixes ornamentais (SATO et al, 2006). Além disso, os lambaris possuem grande importância ecológica ao fazerem parte da dieta de vários vertebrados e serem dispersores secundários de sementes auxiliando na preservação das matas ciliares (FERNANDES; MARTINS-SANTOS, 2004).…”

Section: Efeito De Diferentes Intensidades De Luz Sobre a Resposta Aounclassified

EFEITO DE DIFERENTES INTENSIDADES DE LUZ SOBRE A RESPOSTA AO ESTRESSE, CRESCIMENTO E ÍNDICE REPRODUTIVO EM FÊMEAS DE LAMBARI (Astyanax bimaculatus)

Navarro¹,

Navarro²,

Murgas³

2013

Nucleus Animalium

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RESUMO:Este trabalho teve como objetivo verificar o efeito de diferentes intensidades de luz sobre a resposta ao estresse, crescimento e maturação ovariana em fêmeas de lambari (Astyanax bimaculatus). Vinte juvenis de lambari foram mantidos em aquários de 20L cada um, em delineamento inteiramente ao acaso, com intensidade luminosa de 1173lux, provida de uma lâmpada fluorescente. Outras 20 fêmeas de lambaris foram distribuídas em uma apa situada em um tanque retangular de alvenaria, com intensidade de luz natural de 890lux. Após 40 dias de experimento os peixes, mantidos a jejum de 24 horas, foram previamente anestesiados com benzocaína. Dados de peso final, peso da gônada, comprimento total e índice gonadossomático foram mensurados. Amostras de sangue, através de punção caudal, foram coletadas para as dosagens de glicose e cortisol. Em relação aos resultados, não foram observadas diferenças significativas para níveis plasmáticos de cortisol e glicose entre os tratamentos, porém a taxa de sobrevivência do tratamento com 1173lux foi significativamente menor em relação ao tratamento com 890lux. Os peixes do tratamento com 890lux de intensidade luminosa apresentaram, significativamente, maior peso final, maior peso de gônada e maior IGS em relação ao tratamento de 1173lux. Para comprimento total, não foi observado diferença significativa. Os resultados obtidos neste estudo permitem concluir que a intensidade de luz desempenha um importante papel no bem-estar e na maturação ovariana de fêmeas de lambaris.Palavras-chave: Lambari. Intensidade de luz. Estresse. Índice gonadossomático. EFFECT OF DIFFERENT LIGHT INTENSITIES ON THE STRESS RESPONSE, GROWTH AND OVARIAN MATURATION IN FEMALE OF LAMBARI (Astyanax bimaculatus)SUMMARY: This study aimed to evaluate the effect of different intensities of light on the stress response, growth and ovarian maturation in female of lambari (Astyanax bimaculatus). Twenty juveniles were kept in aquariums tetra 20L each, in a completely randomized design, with light intensity of 1173lux fitted with a fluorescent lamp. Another 20 females were distributed in a tetra apa located in a rectangular tank of masonry with light intensity of natural 890lux. After 40 days of the experiment the fish kept on fasting for 24 hours, were previously anesthetized. Data from the final weight, gonad weight, total length and gonadosomatic index were measured. Samples of blood, through caudal puncture, were collected for assay of glucose and cortisol. In the results, there were no significant differences in plasma levels of cortisol and glucose between treatments, but the survival rate of treatment with 1173lux was significantly lower compared to treatment with 890lux. Fish treatment with 890lux light intensity had significantly higher final weight, weight of gonad higher and higher GSI in relation to the treatment of 1173lux. For total length, there was no significant difference. The results of this study indicate that the intensity of light plays an important role in welfare and ovarian maturation of female of...

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Biologia reprodutiva e reprodução induzida de duas espécies de Characidae (Osteichthyes, Characiformes) da bacia do São Francisco, Minas Gerais, Brasil

Cited by 49 publications

References 5 publications

Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods

Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods

Reproductive biology of pacu Piaractus mesopotamicus (Holmberg, 1887) (Teleostei: Characidae) in the Cuiabá River Basin, Mato Grosso, Brazil

EFEITO DE DIFERENTES INTENSIDADES DE LUZ SOBRE A RESPOSTA AO ESTRESSE, CRESCIMENTO E ÍNDICE REPRODUTIVO EM FÊMEAS DE LAMBARI (Astyanax bimaculatus)

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