Características morfométricas e crescimento do cachara, Pseudoplatystoma fasciatum (Linnaeus, 1766), em cativeiro

Romagosa, Elizabeth; Paiva, P.D.O.; Godinho, Heloisa Maria; Andrade-Talmelli, Elaine Fender de

doi:10.4025/actascianimsci.v25i2.2002

Cited by 6 publications

(9 citation statements)

References 4 publications

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“…The species quality of flesh, fast growth rate and good feed conversion ratio, added to the decline of wild populations as a result of over‐fishing and altered environmental conditions, encouraged their use in fish culture, starting from the late 1980s onwards (Campos 2005). In spite of the species importance for fisheries and aquaculture alike, research with both speckled and striped catfish are relatively recent and scarce (Miranda 1997; Miranda & Ribeiro 1997; Romagosa et al. 2003).…”

Section: Introductionmentioning

confidence: 99%

Intestinal morphology and histology of the striped catfishPseudoplatystoma fasciatum(Linnaeus, 1766) fed dry diets

Rodrigues

Pauletti

Kindlein

et al. 2009

Aquaculture Nutrition

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This study unveils histological features of the intestinal tract of juvenile striped catfish Pseudoplatystoma fasciatum (Linnaeus, 1776) in three size classes (weight, standard length): I – 36.84 ± 10.19 g, 14.52 ± 1.54 cm; II – 59.03 ± 11.47 g, 17.17 ± 1.06 cm; III – 89.72 ± 18.70 g, 20.79 ± 1.55 cm, respectively. Histological organization of the juvenile speckled catfish intestine bears features common to the carnivorous fish, but the organ presents some convolutions that indicate a certain degree of dietary flexibility, a surprising trend, common only to omnivorous Siluriforms. The architecture of the mucosa of the speckled catfish intestine indicates that the species concentrates digestion and absorption of nutrients in the medium intestine, a common feature among carnivorous Teleosts.

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Section: Introductionmentioning

confidence: 99%

Intestinal morphology and histology of the striped catfishPseudoplatystoma fasciatum(Linnaeus, 1766) fed dry diets

Rodrigues

Pauletti

Kindlein

et al. 2009

Aquaculture Nutrition

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“…Em P. fasciatum, mantidos nos VE na mesma região, obtiveram o valor de "b" inferior (machos 3,128 e fêmeas 3,484) (ROMAGOSA et al, 2003b). Em geral, as informações encontradas na literatura referem-se à fase de alevinos até atingirem aproximadamente 1,0kg, quando recebem rações comerciais com peletes de diâmetro de até 8 mm (BURKET, 2002).…”

Section: Resultsunclassified

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

2011

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RESUMO Objetivou-se comparar o desempenho produtivo e custos de produção de exemplares de pintado, Pseudoplatystoma corruscans, estocados em dois sistemas de criação: semi-intensivo (viveiro escavado, VE) e intensivo (tanque-rede, TR). Trezentos (300) Palavras-chave: desempenhos zootécnicos e econômicos,Pseudoplatystoma corruscans. (300) ABSTRACT The objective of this study was to compare the growth performance and cost of production of Pseudoplatystoma corruscans stocked in two culture systems: semi-intensive (ponds, P) and intensive (cage, C). From three hundred

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“…Another important characteristic of this species is the sexual dimorphism of the juveniles. The females are larger and grow faster than males (Romagosa et al ., ), suggesting that monosex female rearing could potentially increase production in captivity.…”

Section: Introductionmentioning

confidence: 99%

Ovarian differentiation and development in cachara Pseudoplatystoma fasciatum

Valentin

Batlouni

Nascimento

et al. 2016

Journal of Fish Biology

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One thousand five hundred cachara or tiger shovelnose catfish Pseudoplatystoma fasciatum, obtained from induced reproduction, were used to determine the onset of ovarian differentiation and development and to record the main characteristics of this process. Samples were collected from 0 to 240 days post-fertilization (dpf) and the results classified into stages I-XII. Ovarian formation was histologically detected for the first time when juveniles measured mean ± s.d. 51·5 ± 8·3 mm total length (LT ) at 39-45 dpf (stages I-V), with intense somatic cell proliferation originating in the ovarian cavity. Both LT and age of fish had a positive correlation (P < 0·001) with ovarian differentiation, but LT showed a greater correlation (r(2) = 0·95) than age (r(2) = 0·85), especially during the initial stages of development. From stages VI to VII, the ovarian cavity was enlarged and undifferentiated oogonia were present. At stage VIII, small projections formed in the ovarian stroma towards the ventral region of the gonad (future ovarian lamellae) and the basal membrane and differentiated oogonia nests could be seen. At stages IX and X, the germ cells entered meiosis and folliculogenesis was completed by stages XI and XII, which can be considered late in comparison to other Siluriformes. This study has demonstrated that ovarian differentiation in P. fasciatum begins with an intense proliferation of squamous epithelial cells (somatic cells) during the early stages of development and that sex inversion protocols could, thus, be applied successfully before this period. Furthermore, the results have demonstrated that both size and age can influence gonad differentiation and development in this species.

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Características morfométricas e crescimento do cachara, Pseudoplatystoma fasciatum (Linnaeus, 1766), em cativeiro

Cited by 6 publications

References 4 publications

Intestinal morphology and histology of the striped catfishPseudoplatystoma fasciatum(Linnaeus, 1766) fed dry diets

Intestinal morphology and histology of the striped catfishPseudoplatystoma fasciatum(Linnaeus, 1766) fed dry diets

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

Ovarian differentiation and development in cachara Pseudoplatystoma fasciatum

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