The Use of Aquatic Invertebrate Toxicity Tests and Invertebrate Enzyme Biomarkers to Assess Toxicity in the States of Aguascalientes and Jalisco, Mexico

Rico‐Martínez, Roberto; Velázquez-Rojas, César Alberto; Pérez‐Legaspi, Ignacio Alejandro; Santos-Medrano, Gustavo Emilio

doi:10.1007/978-1-4615-1305-6_22

Cited by 10 publications

(8 citation statements)

References 8 publications

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“…[4] In Mexico, in spite of the continued use of the cladoceran Daphnia magna as the test organism, [5] efforts are being made to include rotifers as a supplement, if not a substitute, for establishing water quality criteria. [6,7] Absence of published information often impedes inclusion of diverse species as bioassay organisms for mandatory procedures. This is particularly true of Mexico where quantitative data of the toxic effects of heavy metals are available for only a handful rotifer species in spite of the fact that Mexican rotifer diversity is relatively high.…”

Section: Introductionmentioning

confidence: 99%

Population growth of Brachionus macracanthus (Rotifera) in relation to cadmium toxicity: Influence of algal (Chlorella vulgaris) density

Nandini

Chaparro-Herrera

Cárdenas-Arriola

2007

Journal of Environmental Science and Health, Part A

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In the present work, we quantified the harmful effects of Cd(+ 2) to Brachionus macracanthus using both acute (median lethal) and chronic (population growth) toxicity tests. Chronic toxicity tests were conducted under 4 different concentrations (0.000625-0.005 mg L(- 1)) of cadmium chloride at 23 degrees C under 3 food (Chlorella vulgaris) levels (0.5 x 10(6), 1.0 x 10(6) and 2.0 x 10(6) cells mL(- 1)) using static renewal system for three weeks. The median lethal concentration bioassayed at 24 h (LC(50)) for B. macracanthus was 0.19 mg L(- 1) of CdCl(2). Cadmium adversely affected the population growth of B. macracanthus at all tested concentrations. Increase in algal food had a positive effect on the rotifer growth in controls; with increase in Cd levels, the population growth of B. macracanthus decreased even under the highest food level tested. The peak population abundance of B. macracanthus in controls at the highest food level of 2.0 x 10(6) cells mL(- 1) was 40 ind. mL(- 1). Depending on the heavy metal concentration and the algal level, the population growth rate (r) of B. macracanthus varied from 0.02 to 0.28 day(- 1). The relatively higher sensitivity of B. macracanthus to cadmium toxicity is discussed in relation to other species of the same genus.

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Section: Introductionmentioning

confidence: 99%

Population growth of Brachionus macracanthus (Rotifera) in relation to cadmium toxicity: Influence of algal (Chlorella vulgaris) density

Nandini

Chaparro-Herrera

Cárdenas-Arriola

2007

Journal of Environmental Science and Health, Part A

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“…The PLA2 activity in vivo was assayed using the protocol of Burbank and Snell [7], with slight modifications suggested by Rico‐Martínez et al [18]. The neonates used in the tests were hatched from parthenogenetic eggs rather than cysts, as in Burbank and Snell [7].…”

Section: Methodsmentioning

confidence: 99%

Phospholipase A2 activity in three species of littoral freshwater rotifers exposed to several toxicants

Pérez‐Legaspi

Rico‐Martínez

2003

Enviro Toxic and Chemistry

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We analyzed three species of Lecane, a littoral rotifer, for susceptibility to six metals and four organic toxicants using a fluorometric assay based on inhibition of activity of the enzyme phospholipase A2. The metallic toxicants that we tested included Cd, Cr, Cu, Pb, Hg (as HgCl2), and Ti; the organic toxicants included benzene, ethyl acetate, toluene, and vinyl acetate. The three species differed greatly with respect to their susceptibility to the various toxicants. Lecane quadridentata, for example, was particularly sensitive to the four organic compounds (median effective concentration values [EC50] ranged from 6.6 x 10(-4)-0.987 mg/L). Lecane luna, in contrast, seemed particularly sensitive to metals (EC50 values ranged from 2 x 10(-6)-1.92 mg/L). Lecane hamata was relatively insensitive to organic solvents (EC50 values ranged from 4.25-126.5 mg/L).

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“…[12,13] In Aguascalientes we have been using several biomarkers to conduct a preliminary evaluation of the content of toxicity of diverse discharges of the industries in the State. [14] Although the San Pedro River and its tributaries have been highly contaminated through time, in recent years construction of several water treatment plants around the city of Aguascalientes to treat wastewater entering the river have slowly improved its water quality. The aim of this contribution is to conduct a study of the toxicity levels of 22 sampling points in the San Pedro River and its 2 main tributaries (El Chicalote and San Francisco creeks) around the city of Aguascalientes (obtaining comparable LC 50 values in units of toxicity for each sampling point).…”

Section: Study Sitementioning

confidence: 99%

Determination of toxicity levels in the San Pedro River Watershed, Aguascalientes, Mexico

Santos-Medrano

Ramírez-López

Hernández-Flores

et al. 2007

Journal of Environmental Science and Health, Part A

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A quantitative study of toxicity levels of the San Pedro River and its main tributaries around the city of Aguascalientes, Mexico was conducted. Our study determined individual CL(50) values for each sampling point at 3 different times of the year corresponding to the main seasons of the year in terms of the hydrological cycle (dry, low rain and high rain season). Those LC(50) values were used to calculate the acute. Toxicity Units (aTU) that allowed us to compare levels of toxicity along the San Pedro River and two of its main tributaries. The sample that showed highest toxicity was IPIVA. This is due to the large quantity of industrial discharges that receives. Its effluent was responsible for the largest contribution of toxicity to the San Pedro River over the three rounds of sampling of this study. Our study classified an important portion of the San Pedro River and two of its main tributaries in toxic, moderately toxic and lightly toxic. No portion of the river studied was free of toxicity, either acute or sublethal. This study demonstrated that in spite of the operation of several water treatment plants along the San Pedro River, for the most part, the water quality of the river is still unacceptable.

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The Use of Aquatic Invertebrate Toxicity Tests and Invertebrate Enzyme Biomarkers to Assess Toxicity in the States of Aguascalientes and Jalisco, Mexico

Cited by 10 publications

References 8 publications

Population growth of Brachionus macracanthus (Rotifera) in relation to cadmium toxicity: Influence of algal (Chlorella vulgaris) density

Population growth of Brachionus macracanthus (Rotifera) in relation to cadmium toxicity: Influence of algal (Chlorella vulgaris) density

Phospholipase A2 activity in three species of littoral freshwater rotifers exposed to several toxicants

Determination of toxicity levels in the San Pedro River Watershed, Aguascalientes, Mexico

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