Avaliação do crescimento e da produção de Jaraquis (Semaprochilodus spp), em açude de igarapé de terra firme nos arredores de Manaus, Amazonas

Resende, E. K. de; Graef, Ernst W.; Zaniboni‐Filho, Evoy; Paixão, Ana Maria; Filho, Atilio Storti

doi:10.1590/1809-43921985152036

Cited by 3 publications

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“…The highest condition factor values were noticed in the control and 20% artificial substrate treatment and the lowest in 10% natural substrate treatment. These values were superior to those obtained in the cultivation of the same species in semi-intensive conditions (0.95 to 1.13) by Resende et al (1985).…”

Section: Growth Performance Of Fishcontrasting

confidence: 77%

“…Jaraqui production of 250 kg/ha was obtained in the present study of four-month duration, with an extrapolated production of 750 kg/ha/yr. Resende et al (1985) obtained jaraqui biomass gain of 711.6 kg/0.6 ha/yr, equivalent to a yield of 1,267 kg/ha/yr. The difference in performance is associated with the differences in growing conditions and the duration of culture.…”

Section: Growth Performance Of Fishmentioning

confidence: 96%

“…This view is supported by the presence of periphyton growth on the tank walls and visualization of its browsing by fish. Resende et al (1985) evaluated the growth potential of jaraqui (Semaprochilodus sp.) over 386 days in dam ponds intercropped with pigs.…”

Section: Growth Performance Of Fishmentioning

confidence: 99%

“…Fish survival was higher without singnificant differences (P>0.05) among artificial substrate treatments (Table 7). Resende et al (1985) recorded 100% survival of jaraqui (Semaprochilodus sp.) reared in semi-intensive conditions in dam ponds.…”

Section: Growth Performance Of Fishmentioning

confidence: 99%

“…The difference in performance is associated with the differences in growing conditions and the duration of culture. While our study was conducted in masonry tanks of 46 m 2 with average depth of 0.7 m, Resende et al (1985) conducted the experiment over 386 days under semi-intensive conditions in stream dam ponds, which among other factors, may have higher dietary sources available for the fish.…”

Section: Growth Performance Of Fishmentioning

confidence: 99%

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Tortolero¹,

Cavero²,

Brito³

et al. 2016

Turk. J. Fish. Aquat. Sci.

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Influences of two types of substrates, natural (macrophyte, Pistia stratiotes) and artificial (plastic screen) were evaluated at 3 differrent densities (10, 20, 30%) on periphyton development, water quality and growth performance of jaraqui (Semaprochilodus insignis). Fish of average initial weight 1.46-1.69 g and length 4.15-4.26 cm stocked at 1/m 2 in 46 m 2 masonry tanks were grown for 120 days. The tanks were fertilized with urea, triple superphosphate and wheat bran. The types and densities of substrates tested did not drastically influence water quality. Natural substrate harboured higher periphyton biomass (1.48±0.09 mg/cm 2 ) as well as species diversity (28 genera) than the artificial substrate (0.84±0.12 mg/cm 2 , 20 genera). Fish in 10% and 20% artificial substrate and 20% natural substrate treatments showed better mean values of body weight (24.64, 23.86, 29.26 g respectively) on termination of the experiment. Fish survival was the lowest in 30% natural substrate (84.1%) and highest in 10% artificial substrate (94.2%). Higher fish biomass was recorded in 20% natural and 10% artificial substrate treatments (25.05 and 21.71 g/m 2 ), which amounts to a four-month yield of 250 and 217 kg/ha in the two treatments.

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Section: Growth Performance Of Fishcontrasting

confidence: 77%

Section: Growth Performance Of Fishmentioning

confidence: 96%

Section: Growth Performance Of Fishmentioning

confidence: 99%

Section: Growth Performance Of Fishmentioning

confidence: 99%

Section: Growth Performance Of Fishmentioning

confidence: 99%

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Untitled

Tortolero¹,

Cavero²,

Brito³

et al. 2016

Turk. J. Fish. Aquat. Sci.

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Freshwater fishes of the Amazon River basin: their biodiversity, fisheries, and habitats

Junk

Soares

Bayley

2007

Aquatic Ecosystem Health &Amp; Management

156

101

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Stretching more than seven million square kilometers, the Amazon River basin is the largest river basin in the world and discharges about one-sixth of all freshwater from the continents to the oceans of the world. The age of this ecosystem, its position near the equator and the enormous diversity of its aquatic habitats, have produced the most diverse fish fauna on the planet. About 2,500 fish species have already been described and it is estimated that more than 1,000 new species remain to be discovered. Knowledge concerning this multitude of fish species is still insufficient, which makes their management and protection difficult. About 50% of the species are thought to occur in the large rivers and connected floodplains and another 50% in headwater streams. Inland fisheries give rise to 450,000 t of fish each year and thus contribute substantially to the protein supply of local populations. However, despite their economic importance, these fisheries receive little attention from the respective governments. The fisheries are highly selective and several stocks of large species with high market value have been over fished. Fish culture is still in its infancy but its development is expected to provide high-quality species during periods of low supply. Over large areas, aquatic habitats are still in near-natural conditions because of the low densities of resident human populations. Nonetheless, over the last few decades, the pressure on aquatic ecosystems and habitats has steadily increased, mainly due to large-scale destruction of natural vegetation cover by agro-industries in the savanna belt (cerrado), small-scale agriculture in the Andean hill slopes, and logging in rain forests. These activities have placed aquatic biodiversity, including fishes, at serious risk. Many headwater species have restricted distributions and are therefore particularly vulnerable to large-scale environmental degradation. Moreover, the construction of large reservoirs for hydroelectric power generation has serious consequences for fish fauna. Currently, about 16.4% of the Amazon River basin is protected, and another 15.2% is under partial protection in indigenous reserves in Brazil. Another 9.1% will be implemented as reserves in the next 10 years in the Brazilian part of the basin. The formulation by the Amazonian countries of a coherent policy that integrates long-term management of the river basin with sustainable management of aquatic and wetland habitats, including their fauna and flora, is urgently needed

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Parâmetros Limnológicos Em Viveiros De Piscicultura Semi-Intensiva De Tambaqui Com Abastecimento Em Disposição Sequencial

et al. 2018

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A piscicultura é um dos segmentos da produção animal que mais cresce no cenário mundial; neste ramo a qualidade da água é preocupação constante, pois quando esta apresenta má qualidade causa problemas na produção e pouca lucratividade. Objetivou-se avaliar a qualidade da água com base em algumas variáveis limnológicas em viveiros de piscicultura de engorda de tambaqui (Colossoma macropomum) com abastecimento em disposição sequencial. Os resultados indicaram que o regime de chuvas e o manejo durante o ciclo de produção influenciaram os parâmetros avaliados. No universo temporal da pesquisa (ago./2013 a jul./2014), os valores de pH, amônia e nitrito estiveram de acordo com a resolução Conama 357/2005; a alcalinidade e temperatura estiveram dentro dos padrões indicados para piscicultura, o contrário para a maioria dos valores amostrados para o oxigênio dissolvido e fósforo total. Em ago./2013, mês dos menores índices pluviométricos na região, os viveiros apresentaram condutividade elétrica acima do estabelecido pela resolução Conama 357/2005; em out./2013 houve aumento expressivo da densidade da comunidade fitoplanctônica com florações pontuais, acarretando a menor transparência e oxigênio dissolvido em todos os viveiros. Os resultados indicam a necessidade de adoção sistemática de boas práticas de manejo a fim de melhorar a qualidade ambiental das criações, como também contribuir para a sustentabilidade da atividade aquícola.

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Avaliação do crescimento e da produção de Jaraquis (Semaprochilodus spp), em açude de igarapé de terra firme nos arredores de Manaus, Amazonas

Cited by 3 publications

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Freshwater fishes of the Amazon River basin: their biodiversity, fisheries, and habitats

Parâmetros Limnológicos Em Viveiros De Piscicultura Semi-Intensiva De Tambaqui Com Abastecimento Em Disposição Sequencial

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