Desempenho produtivo de Pseudoplatystoma corruscans estocados em sistemas de criação: semi-intensivo (viveiro escavado) e intensivo (tanque-rede)

Liranço, Andressa Daniela de Sousa; Romagosa, Elizabeth; Scorvo-Filho, Joao Donato

doi:10.1590/s0103-84782011000300027

Cited by 14 publications

(9 citation statements)

References 2 publications

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“…The hybrid sorubim, or sorubim catfish, is a fish of the Pseudoplatystoma genus from the crossing of P. reticulatum female (Eigenmann & Eigenmann 1889) and P. corruscans male (Spix & Agassiz 1829). The population of this fish is expanding within Brazil, especially in the Brazilian Central‐West region (IBGE ), because of its commercially attractive fast growth, efficient feed conversion ratio, carcass yield and the absence of intramuscular bones (Scorvo Filho, Romagosa, Ayroza & Frascá‐Scorvo ; Liranço, Romagosa & Scorvo‐Filho ; Fantini, Rodrigues, Nunes, Sanchez, Ushizima & Campos ).…”

Section: Introductionmentioning

confidence: 99%

Liver histology and histomorphometry in hybrid sorubim (Pseudoplatystoma reticulatum × Pseudoplatystoma corruscans ) reared on intensive fish farming

2017

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This study aimed to characterize the liver histology and histomorphometry in sorubim hybrid of different categories (nursery, growth and grow-out) reared on fish farming. The categories were defined considering body weight (BW): nursery category (n = 5): BW = 37.06 AE 6.00 g (31.6-45.3 g); growth category (n = 5): BW = 310.40 AE 53.80 g (242.1-376.4 g) and grow-out category (n = 5): BW = 874.28 AE 27.59 g (846.2-913.1 g). Liver fragments were processed to paraffin inclusion, and sections were stained by haematoxylin and eosin (H&E), PAS (Periodic Acid Schiff) and Perl's staining to histology, histomorphometry and density volumetric of liver structures; glycogen analysis and to detect ferric irons (Fe 3+ ) respectively. The hepatosomatic index decreased between the categories (P < 0.01). The percentage of PAS-positive hepatocytes in the nursery category was higher (P < 0.05) in relation to the growth and grow-out categories. The hepatocytes from all fish were positive to Perl's staining. The density volumetric of liver structures did not differ among categories except to blood vessels were higher (P < 0.01) in the nursery and growth. The area (lm 2 ) and perimeter (lm) of hepatocytes, and the area (lm 2 ), perimeter (lm) and volume (lm 3 ) of the nuclei from grow-out fish were lower (P < 0.01) than those from the nursery and growth categories. Changes in morphometric characteristics of hepatocytes may result from metabolic changes associated with body growth surubins; therefore, these morphometric characteristics of liver tissue can be used as functional biomarkers for the assessment of fish health and nutrition status.

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Section: Introductionmentioning

confidence: 99%

Liver histology and histomorphometry in hybrid sorubim (Pseudoplatystoma reticulatum × Pseudoplatystoma corruscans ) reared on intensive fish farming

2017

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“…Complementation of artificial feed with natural food may be one of the factors that explains better growth performance of a given species in semi-intensive farming systems, where natural food is available, compared to intensive systems where they rely exclusively on the artificial feed provided (Liranc ßo, Romagosa & Scorvo-Filho, 2011). This may be even more noticeable with fish that are not fed diets formulated according to their nutritional requirements, a common situation for the native fish species farmed in Brazil (Cyrino, Bicudo, Sado, Borghesi & Dairiki, 2010).…”

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confidence: 99%

Natural food intake by juvenileArapaima gigasduring the grow-out phase in earthen ponds

2018

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In carnivorous fish species, zooplankton is one of the main food items in the early life stages and some fish species continue feeding on such food items further along the life stages even in the farming environment. In this study, the intake of natural food items was assessed in juvenile pirarucu Arapaima gigas reared in earthen ponds. Juvenile pirarucu (12.2 ± 4.32 g and 12.1 ± 1.13 cm) were stocked in fertilized earthen ponds (240 m²). For the analysis of the fish stomach content and plankton in the pond water, the fish and pond water were sampled weekly for 75 days and biweekly until the fish reached a mean weight of 750 g. Although artificial feed was used, pirarucu also ingested the natural food available in the pond water. Among the zooplankton, pirarucu demonstrated feeding preference for cladocerans despite the abundance of rotifers and copepods. Cladocerans were present in more than 80% of the stomach contents of fish up to 300 g and in 65%, 45% and 17% of fish of 301–500 g, 501–700 g and 701–900 g respectively. Copepods were present only in fish up to 500 g at low abundance. High ingestion of insects and plant material was observed in the stomach content of fish of all size classes. The results demonstrate that juvenile pirarucu ingest natural food available in the farming pond and suggests that the adoption of pond fertilization practices may have positive effects on fish growth performance.

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“…4), possibilita a tomada de decisão em relação à dieta a ser empregada. Segundo Liranço et al (2011), a ração é o ponto de maior custo de produção, sendo o que apresenta a maior variação nos custos operacionais. O aumento de proteína na ração acarreta maior custo desse produto, uma vez que é a fração mais onerosa desse insumo (Tashibana e Castagnolli, 2003).…”

Section: Resultsunclassified

“…Calcularam-se o índice de eficiência econômica (IEE) e o índice de custo médio, propostos por Liranço et al (2011).…”

Section: Methodsunclassified

“…Os melhores índices de crescimento e o menor custo de arraçoamento foram obtidos pelos peixes alimentados com a dieta 38%PB, sendo esta, portanto recomendada para o arraçoamento na fase final de surubins em tanque-rede. (Mayumeoshiro et al, 2012;Liranço et al, 2011;Martino et al, 2005). Os surubins apresentam grande potencial para a aquicultura, pois possuem características zootécnicas, organolépticas e de rendimento de carcaça favoráveis ao atendimento do mercado consumidor.…”

Section: Introductionunclassified

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Desempenho produtivo e econômica de surubins (Pseudoplatystoma sp.) alimentados com níveis de proteína e estocados em tanque-rede

Honorato

Ushizima²,

Santamaria³

et al. 2015

Arq. Bras. Med. Vet. Zootec.

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Desempenho produtivo de Pseudoplatystoma corruscans estocados em sistemas de criação: semi-intensivo (viveiro escavado) e intensivo (tanque-rede)

Cited by 14 publications

References 2 publications

Liver histology and histomorphometry in hybrid sorubim (Pseudoplatystoma reticulatum × Pseudoplatystoma corruscans ) reared on intensive fish farming

Liver histology and histomorphometry in hybrid sorubim (Pseudoplatystoma reticulatum × Pseudoplatystoma corruscans ) reared on intensive fish farming

Natural food intake by juvenileArapaima gigasduring the grow-out phase in earthen ponds

Desempenho produtivo e econômica de surubins (Pseudoplatystoma sp.) alimentados com níveis de proteína e estocados em tanque-rede

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