Part 1: Laboratory culture of Centroptilum triangulifer (Ephemeroptera: Baetidae) using a defined diet of three diatoms

Weaver, Paul C.; Lazorchak, James M.; Struewing, Katherine A.; DeCelles, Susanna; Funk, David H.; Buchwalter, David B.; Johnson, Brent

doi:10.1016/j.chemosphere.2014.04.092

Cited by 23 publications

(27 citation statements)

References 29 publications

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“…We compared the relationship between pre-egg-laying weight and the number of eggs produced per female in the present study with that reported in Weaver et al [14], and although our fecundity numbers were consistently lower than those predicted by their equation (Figure 4), the slopes of the lines were quite similar whether we used only control data ( Figure 4A) or both control and exposure data ( Figure 4B). If we use our data to predict a minimum adult weight at which 1000 eggs or more would be produced in the same manner as that described in Weaver et al [14], we obtain values of 2.95 mg for control-only data, and 2.72 for control plus exposure data. These numbers bracket the previously reported value of 2.8 mg [14].…”

Section: Discussionsupporting

confidence: 58%

“…If we use our data to predict a minimum adult weight at which 1000 eggs or more would be produced in the same manner as that described in Weaver et al [14], we obtain values of 2.95 mg for control-only data, and 2.72 for control plus exposure data. These numbers bracket the previously reported value of 2.8 mg [14]. In other words, using our "controls only" equation to predict number of eggs based on a weight of 2.0 mg results in a value that is 80% of the result using the Weaver et al [14] equation, and at a weight of 3.8 mg (just above our maximum), our equation produced a number of eggs value that was 94% of that using the Weaver et al [14] equation.…”

Section: Discussionmentioning

confidence: 82%

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Full‐life chronic toxicity of sodium salts to the mayflyNeocloeon trianguliferin tests with laboratory cultured food

Soucek

Dickinson

2015

Enviro Toxic and Chemistry

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Although insects occur in nearly all freshwater ecosystems, few sensitive insect models exist for use in determining the toxicity of contaminants. The objectives of the present study were to adapt previously developed culturing and toxicity testing methods for the mayfly Neocloeon triangulifer (Ephemeroptera: Baetidae), and to further develop a method for chronic toxicity tests spanning organism ages of less than 24 h post hatch to adult emergence, using a laboratory cultured diatom diet. The authors conducted 96-h fed acute tests and full-life chronic toxicity tests with sodium chloride, sodium nitrate, and sodium sulfate. The authors generated 96-h median lethal concentrations (LC50s) of 1062 mg Cl/L (mean of 3 tests), 179 mg N-NO3 /L, and 1227 mg SO4 /L. Acute to chronic ratios ranged from 2.1 to 6.4 for chloride, 2.5 to 5.1 for nitrate, and 2.3 to 8.5 for sulfate. The endpoints related to survival and development time were consistently the most sensitive in the tests. The chronic values generated for chloride were in the same range as those generated by others using natural foods. Furthermore, our weight-versus-fecundity plots were similar to those previously published using the food culturing method on which the present authors' method was based, indicating good potential for standardization. The authors believe that the continued use of this sensitive mayfly species in laboratory studies will help to close the gap in understanding between standard laboratory toxicity test results and field-based observations of community impairment.

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Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 82%

Full‐life chronic toxicity of sodium salts to the mayflyNeocloeon trianguliferin tests with laboratory cultured food

Soucek

Dickinson

2015

Enviro Toxic and Chemistry

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“…Until relatively recently, difficulties with culturing have precluded the use of mayflies as laboratory toxicity testing organisms to any great extent; however, researchers at Stroud Water Research Center developed a method for testing a parthenogenetic species ( Neocloeon triangulifer ) that readily reproduces under laboratory conditions (Sweeney et al ). Furthermore, recent efforts to develop laboratory cultured diets and chronic toxicity testing methods for mayflies have been successful and will help us move toward standardization of methods for this species (Soucek and Dickinson ; Struewing et al ; Weaver et al ). In acute (96‐h) exposures reported by Soucek and Dickinson (), sodium chloride median lethal concentrations (LC50s) for N. triangulifer were approximately equal to those reported for the cladoceran Ceriodaphnia dubia (Mount et al ), but sodium sulfate LC50s were approximately half those for C. dubia .…”

Section: Introductionmentioning

confidence: 99%

Influence of dilution water ionic composition on acute major ion toxicity to the mayfly Neocloeon triangulifer

Soucek

Mount

Dickinson

et al. 2018

Enviro Toxic and Chemistry

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Field and laboratory studies have shown that mayflies (Ephemeroptera) tend to be relatively sensitive to elevated major ion concentrations, but little is known about how ionic composition influences these responses. The present study evaluated the acute toxicity of major ion salts to the mayfly Neocloeon triangulifer over a range of background water quality conditions. The mayfly was particularly sensitive to Na SO , with the median lethal concentration (LC50) of 1338 mg SO /L being lower than LC50s reported for 7 other species at that hardness. Increasing hardness of the dilution water from 30 to 150 mg/L (as CaCO ) resulted in doubling of LC50s for sodium salts, and an approximately 1.5-fold increase in LC50 for MgSO . Potassium salt toxicity was not strongly influenced by hardness, consistent with findings for other species. When hardness was held constant but the Ca to Mg ratio was manipulated, the ameliorative effect on Na SO and NaCl did not appear as strong as when hardness was varied; but for MgSO the amelioration relative to Ca activity was similar between the 2 experiments. The toxicity of K salts to N. triangulifer was similar to Na salts on a millimolar basis, which contrasts with several other species for which K salts have been much more toxic. In addition, the toxicity of KCl to N. triangulifer was not notably affected by Na concentration, as has been shown for Ceriodaphnia dubia. Finally, plotting LC50s in terms of ion activity (Cl, SO , Na, Mg, or K) over the range of Ca activities in dilution water resulted in significant positive relationships, with comparable slopes to those previously observed for C. dubia over the same range of Ca activities. Environ Toxicol Chem 2018;37:1330-1339. © 2018 SETAC.

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“…Progress in this context has been made in North America, with the development of toxicity tests using Neocloeon triangulifer (previously Centroptilum and Cloeon ) and Hexagenia spp. (Soucek and Dickinson 2015; Struewing et al 2015; Weaver et al 2015). In Europe, interest has focused on field‐collected Cloeon dipterum ; however, a standardized toxicity test method has yet to be developed.…”

Section: Introductionmentioning

confidence: 99%

Mayflies in Ecotoxicity Testing: Methodological Needs and Knowledge Gaps

Sibley

Lagadic

McCoole

et al. 2020

Integr Envir Assess & Manag

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Part 1: Laboratory culture of Centroptilum triangulifer (Ephemeroptera: Baetidae) using a defined diet of three diatoms

Cited by 23 publications

References 29 publications

Full‐life chronic toxicity of sodium salts to the mayflyNeocloeon trianguliferin tests with laboratory cultured food

Full‐life chronic toxicity of sodium salts to the mayflyNeocloeon trianguliferin tests with laboratory cultured food

Influence of dilution water ionic composition on acute major ion toxicity to the mayfly Neocloeon triangulifer

Mayflies in Ecotoxicity Testing: Methodological Needs and Knowledge Gaps

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