Mechanisms of acid-base and ionoregulation in white suckers (Catostomus commersoni) in natural soft water

Hõbe, Helve; Wood, Chris M.; McMahon, Brian R.

doi:10.1007/bf00683214

Cited by 46 publications

(10 citation statements)

References 45 publications

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“…The aetiology of these plasma ion disturbances are not clear from the data. Plasma protein levels have been suggested to be a possible indicator of alterations in plasma volume via changes in plasma water (Wood & McDonald, 1982) in acid-exposed freshwater teleosts, and have been used as such by other authors (Brown et al, 1984;Hobe et al, 1984;Haux et al, 1985). If this hypothesis is valid then the data would suggest that the elevated plasma ion levels in flounder may have occurred partly as a consequence of a reduced plasma volume since the plasma protein levels were significantly elevated at a time of greatest osmoregulatory disturbance.…”

Section: Discussionmentioning

confidence: 99%

The effects of handling on flounder (Platichthys flesus L.) and Atlantic salmon (Salmo salar L.)

Waring

Stagg

Poxton

1992

Journal of Fish Biology

107

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The effect of 9 min of net confinement on two marine teleost species, the flounder and the Atlantic salmon, was investigated in order to gauge how different species respond to the same stress stimulus. Net confinement in both species induced significant elevations in plasma cortisol, glucose, lactate, osmolality, and monovalent ion levels; the responses to net confinement in salmon were generally of a greater magnitude. In both species, handling induced significant alterations in PFFA levels though there were marked species differences in the qualitative and quantitative aspects of this response. Plasma protein levels were significantly elevated only in the flounders. In general, the two species responded similarly to the net confinement with differences only in the absolute levels and durations of the responses.

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Section: Discussionmentioning

confidence: 99%

The effects of handling on flounder (Platichthys flesus L.) and Atlantic salmon (Salmo salar L.)

Waring

Stagg

Poxton

1992

Journal of Fish Biology

107

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“…Low pH inhibits influx of Na þ by increasing the [H þ ] gradient against which the NHE or VHA act [106][107][108]. Low pH also increases gill epithelial ion permeability, resulting in increased Na þ efflux [109][110][111][112]. The result is a large decrease in blood [Na þ ] in fish, although sensitivity can vary significantly among species.…”

Section: Sodium (Na þ )mentioning

confidence: 99%

Toxicological perspective on the osmoregulation and ionoregulation physiology of major ions by freshwater animals: Teleost fish, crustacea, aquatic insects, and Mollusca

Griffith

2016

Enviro Toxic and Chemistry

146

136

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Anthropogenic sources increase freshwater salinity and produce differences in constituent ions compared with natural waters. Moreover, ions differ in physiological roles and concentrations in intracellular and extracellular fluids. Four freshwater taxa groups are compared, to investigate similarities and differences in ion transport processes and what ion transport mechanisms suggest about the toxicity of these or other ions in freshwater. Although differences exist, many ion transporters are functionally similar and may belong to evolutionarily conserved protein families. For example, the Na+/H+-exchanger in teleost fish differs from the H+/2Na+ (or Ca2+)-exchanger in crustaceans. In osmoregulation, Na+ and Cl− predominate. Stenohaline freshwater animals hyperregulate until they are no longer able to maintain hypertonic extracellular Na+ and Cl− concentrations with increasing salinity and become isotonic. Toxic effects of K+ are related to ionoregulation and volume regulation. The ionic balance between intracellular and extracellular fluids is maintained by Na+/K+-adenosine triphosphatase (ATPase), but details are lacking on apical K+ transporters. Elevated H+ affects the maintenance of internal Na+ by Na+/H+ exchange; elevated HCO3− inhibits Cl− uptake. The uptake of Mg2+ occurs by the gills or intestine, but details are lacking on Mg2+ transporters. In unionid gills, SO42− is actively transported, but most epithelia are generally impermeant to SO42−. Transporters of Ca2+ maintain homeostasis of dissolved Ca2+. More integration of physiology with toxicology is needed to fully understand freshwater ion effects.

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“…Located within the gills and the epithelia of fish, invertebrates, and amphibians, ionocytes are densely packed with mitochondria. Ionocytes use adenosine triphosphatase (ATP), to move ions across the cell membrane [23][24][25]. An enzyme involved in this process, sodium-potassium adenosine triphosphatase, (Na þ /K þ ATPase), also known as the Na þ /K þ pump, is likely affected by exposure to HCO 3 À .…”

Section: Mode Of Toxicitymentioning

confidence: 99%

Acute toxicity of sodium bicarbonate, a major component of coal bed natural gas produced waters, to 13 aquatic species as defined in the laboratory

Harper

Farag

Skaar

2014

Enviro Toxic and Chemistry

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Water produced during coal bed natural gas (CBNG) extraction in the Powder River Structural Basin of Wyoming and Montana (USA) may contain concentrations of sodium bicarbonate (NaHCO3) of more than 3000 mg/L. The authors evaluated the acute toxicity of NaHCO3, also expressed as bicarbonate (HCO3(-)), to 13 aquatic organisms. Of the 13 species tested, 7 had a median lethal concentration (LC50) less than 2000 mg/L NaHCO3, or 1300 mg/L HCO3(-). The most sensitive species were Ceriodaphnia dubia, freshwater mussels (Lampsilis siliquoidea), pallid sturgeon (Scaphirhynchus albus), and shovelnose sturgeon (Scaphirhynchus platorynchus). The respective LC50s were 989 mg/L, 1120 mg/L, 1249 mg/L, and 1430 mg/L NaHCO3, or 699 mg/L, 844 mg/L, 831 mg/L, and 1038 mg/L HCO3(-). Age affected the sensitivity of fathead minnows, even within life stage. Two days posthatch, fathead minnows were more sensitive to NaHCO3 and HCO3(-) compared with 4-d-old fish, even though fish up to 14 d old are commonly used for toxicity evaluations. The authors recommend that ion toxicity exposures be conducted with organisms less than 24 h posthatch to ensure that experiments document the most sensitive stage of development. The results of the present study, along with historical and current research regarding the toxicity of bicarbonate, may be useful to establish regulatory standards for HCO3(-). This article is a US Government work and is in the public domain in the USA.

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Mechanisms of acid-base and ionoregulation in white suckers (Catostomus commersoni) in natural soft water

Cited by 46 publications

References 45 publications

The effects of handling on flounder (Platichthys flesus L.) and Atlantic salmon (Salmo salar L.)

The effects of handling on flounder (Platichthys flesus L.) and Atlantic salmon (Salmo salar L.)

Toxicological perspective on the osmoregulation and ionoregulation physiology of major ions by freshwater animals: Teleost fish, crustacea, aquatic insects, and Mollusca

Acute toxicity of sodium bicarbonate, a major component of coal bed natural gas produced waters, to 13 aquatic species as defined in the laboratory

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