Na+ and K+ body levels and survival of fingerlings of Rhamdia quelen (Siluriformes, Pimelodidae) exposed to acute changes of water pH.

Zaions, Maria Ignez; Baldisserotto, Bernardo

doi:10.1590/s0103-84782000000600020

Cited by 31 publications

(24 citation statements)

References 18 publications

(12 reference statements)

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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. As stated by WOOD & MCDONALD (1982), nonacidophilic species suffocate at pH levels below 4.0 due to gill structural damage, edema and mucification.…”

Section: Discussionsupporting

confidence: 76%

“…At each concentration of HA, four pH ranges were tested, with the following minimum values: 3.8, 4.0, 4.2 and 7.0 (Table 1). The acidic pH tested in the present study were near the most acidic pH (pH 4.0) that allows 100% survival in silver catfish (ZAIONS & BALDISSEROTTO 2000). A pH meter DMPH-2 (Digimed, São Paulo, Brazil) was used to measure the variable four times a day and adjustments to the minimum values within each range were made with sulfuric acid 1 M when necessary.…”

Section: Methodsmentioning

confidence: 99%

“…The outcome of the interaction between such variables should be investigated to improve the rearing conditions of this fish. In laboratory settings, silver catfish juveniles survive for at least 96 hours in the pH 4-9 range (ZAIONS & BALDISSEROTTO 2000), but exposure to pH 5.0 is enough to reduce growth in this species (COPATTI et al 2005). Therefore, if humic acid has a protective effect on silver catfish exposed to acidic waters, it could reduce the deleterious effect of low pH and improve growth in this species.…”

Section: Zoologia 32 (3): 215-224 June 2015mentioning

confidence: 99%

“…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.…”

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confidence: 99%

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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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Section: Discussionsupporting

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Section: Zoologia 32 (3): 215-224 June 2015mentioning

confidence: 99%

mentioning

confidence: 99%

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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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“…This species is found in almost all states of Brazil and can survive to acute pH changes within the 4.0-9.0 range without significant mortality (ZAIONS & BALDISSEROTTO, 2000). Exposure to low pH (5.5-6.0) reduced length and weight of silver catfish larvae compared to those maintained at pH 8.0-8.5 (LOPES et al, 2001), and growth of juveniles of this species is lower in acidic (pH 5.5) or alkaline (pH 9.0) soft water compared to neutral water (pH 7.0) (COPATTI et al, 2005; in press a, b).…”

Section: Introductionmentioning

confidence: 99%

Low water hardness and pH affect growth and survival of silver catfish juveniles

et al. 2011

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Biomarkers’ Responses of Rhamdia quelen Exposed In Situ on a Brazilian River Located in Agricultural Areas

Severo

Marins

Menezes

et al. 2023

Water Air Soil Pollut

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Na+ and K+ body levels and survival of fingerlings of Rhamdia quelen (Siluriformes, Pimelodidae) exposed to acute changes of water pH.

Abstract: SUMMARY

Cited by 31 publications

References 18 publications

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

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

Low water hardness and pH affect growth and survival of silver catfish juveniles

Biomarkers’ Responses of Rhamdia quelen Exposed In Situ on a Brazilian River Located in Agricultural Areas

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