Waterborne ammonia and silver catfish, Rhamdia quelen: survival and growth

Miron, Denise dos Santos; Becker, Alexssandro Geferson; Loro, Vânia Lúcia; Baldisserotto, Bernardo

doi:10.1590/s0103-84782011000200028

Cited by 13 publications

(12 citation statements)

References 17 publications

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“…Results obtained for Na + , ammonia and nitrite were within the limits reported earlier as appropriate for silver catfish growth (LIMA et al, 2011;MIRON et al, 2011). Periodic exchange of 20% of the water volume in the experimental tanks was probably responsible for maintaining these parameters at suitable levels.…”

Section: Discussionsupporting

confidence: 82%

Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels

et al. 2016

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Section: Discussionsupporting

confidence: 82%

Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels

et al. 2016

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“…Chronic or sublethal exposure to NH 3 can also cause degeneration of tissues in the gills (MIRON et al, 2008). Sub-lethal ammonia concentrations decrease the growth rate of fish (MIRON et al, 2011;FERREIRA et al, 2013), interfering in the artificial fertilization (VIDAL et al, 2013) and may cause several physiological and histological changes (WRIGHT;WOOD, 2012;LIEW et al, 2013). For these reasons, toxicity of ammonia to fish has been intensively investigated in numerous fish species (BENLÍ;KÖKSAL, 2005;ERDOGAN et al, 2005;MIRON et al, 2008;LIEW et al, 2013;FERREIRA et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Tolerance of piava juveniles to different ammonia concentrations

et al. 2015

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The objective of this study was to evaluate the tolerance of piavas (Leporinus obtusidens) to ammonia (NH 3 ) by measuring its effects on plasma ion levels and tissue metabolic parameters. Piava juveniles (25-30 g) were exposed to five concentrations of NH 3 (mg L -1 ): 0.003 (control), 0.1, 0.4, 0.7, and 1.4; after 96 hours, plasma levels of Na + , K + , Cl -and NH 4 + ions and metabolic and enzyme activity in tissues (liver, kidneys, gills and muscle) were measured. The lethal concentration (LC50; 96h) of NH 3 was 0.27 mg L -1 . As NH 3 increased, Na + and NH 4 + in the plasma increased and K + decreased. In addition, Na + /K + -ATPase activity concomitantly increased in the gills and decreased in the kidneys. Glucose, glycogen, and protein levels decreased, while lactate and ammonia increased in the tissues of piava juveniles that were treated with higher concentrations of ammonia. The observed lethal toxicity could be due to a gradual depletion of plasma ion levels and a reduction of metabolic and Na -ATPase aumentou nas brânquias e diminuiu nos rins com o aumento das concentrações de NH 3 na água. Níveis de glicose, glicogênio e proteína (exceto no músculo) também reduziram, mas níveis de lactato aumentaram nos tecidos dos juvenis expostos as maiores concentrações de NH 3 na água. A toxicidade letal observada poderia ser devido a depleção gradual de íons no plasma, a redução do metabolismo e a atividade nos tecidos de Na + /K + -ATPase. O aumento das concentrações de amônia na água leva ao acúmulo de amônia no plasma e nos tecidos, o que reduz o gradiente de difusão plasma-água de NH 3 e induz alterações metabólicas e ionoregulatórias nas piavas, o que tem implicações para o manejo de piavas. Palavras-chave: Ionoregulação, concentração letal, Na

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“…nitrite and un-ionized ammonia levels below 1.2 mg L -1 and 0.1 mg L -1 respectively) (LIMA et al 2011, MIRON et al 2011). According to ZAIONS & BALDISSEROTTO (2000), even though silver catfish presents a marked loss of Na + at pH 4.0, this is the acidic pH threshold for the species survival, at least for 96 h. In the present assessment this assertion was confirmed by the 0% survival of fish exposed to pH 3.8 regardless the HA concentrations.…”

Section: Discussionmentioning

confidence: 99%

Effect of humic acid on survival, ionoregulation and hematology of the silver catfish, Rhamdia quelen (Siluriformes: Heptapteridae), exposed to different pHs

Costa¹,

Gressler²,

Sutili³

et al. 2015

Zoologia (Curitiba)

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| Sociedade Brasileira de Zoologia | www.sbzoologia.org.br | www.scielo.br/zool All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY-NC.Dissolved organic matter, an integral part of all ecosystems, results from the decay of plant and animal debris (THURMAN 1985). It comprises humic, fulvic, and other organic acids, and is usually quantified as dissolved organic carbon (DOC) (WOOD et al. 2011). DOC is known to positively regulate several biotic/abiotic processes (STEINBERG et al. 2007, WOOD et al. 2011. In blackwaters, such as those found in forest streams in the Amazon, coastal lagoons in southeastern Brazil, Finnish and Swedish lakes, and Canadian wetlands, DOC may range from 10 to 300 mg CL -1 , while its average content in freshwater systems elsewhere is 0.5-4.0 mg CL -1 (THURMAN 1985, KÜCHLER et al. 2000, FARJALLA et al. 2009). The high levels of DOC account for the acidity of the aquatic environment. In order to thrive in acidic environments, organisms need a certain degree of specialization in their osmoregulatory organs (MATSUO & VAL 2007).Low pH (pH 4-5) induces ion loss (ZAIONS & BALDISSEROTTO 2000, 2003, BOLNER & BALDISSEROTTO 2007, MATSUO & VAL 2007, DUARTE et al. 2013) and the interference with gill ionoregulatory mechanisms may also trigger hematological disturbances. Ionic dilution, potentiated by the plasma acidosis prompted by H + entry, affects body fluid distribution. This could promote reduction in plasma volume, swelling of erythrocytes or splenic contraction, resulting in elevation of the hematocrit (MILLIGAN & WOOD 1982). Despite being highly responsible for the acidic nature of blackwaters, there is evidence that DOC protects native fish from the deleterious effects of low pH, reducing ion loss , 2003, MATSUO & VAL 2007. According to some studies, the occurrence of various charged functional groups in the heterogeneous compounds of DOC may change fundamental properties of the gill epithelium, such as the transepithelial potential, thus altering membrane permeability and stimulating ion uptake (WOOD et al. 2011). Humic acid also reduces respiratory stress in fish exposed to slightly acidic water, but increases it at more acidic waters (HOLLAND et al. 2014) and decreases lipid peroxidation and modulates the antioxidant system (RIFFEL et al. 2014). In opposition to the several findings regarding the effects of DOC on ionoregulatory disturbances, respiratory stress and antioxidant system, no evidence has been documented about its influence on the hematology of fish subjected to acidic pH. 4.2, erythrocytes of fish not exposed to HA were smaller, an effect that was partially offset by the presence of HA, since the values at pH 7.0 were higher. Although HA showed some positive effects changes in hematological and plasma K + ª in silver catfish caused by exposure to acidic pH, the overall findings suggest that HA does not protect this species against acidic pH because it increased mortality and Cl -loss at pH 4.0. Effect of humic acid on su...

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Waterborne ammonia and silver catfish, Rhamdia quelen: survival and growth

Cited by 13 publications

References 17 publications

Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels

Growth of silver catfish ( Rhamdia quelen ) exposed to acidic pH at different humic acid levels

Tolerance of piava juveniles to different ammonia concentrations

Effect of humic acid on survival, ionoregulation and hematology of the silver catfish, Rhamdia quelen (Siluriformes: Heptapteridae), exposed to different pHs

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