Freshwater Molluscs as Indicators of Bioavailability and Toxicity of Metals in Surface-Water Systems

Elder, John F.; Collins, Jerilyn J.

doi:10.1007/978-1-4612-3198-1_2

Cited by 86 publications

(54 citation statements)

References 133 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies reported that snails are indiscriminate grazers searching for food (mainly detritus) (e.g., organic pieces, algae, silts) which adhere to the surface of macrophytes or the sediment or other substrata, and adapt their diets to the relative abundance of available sources (Elder and Collins, 1991), and other studies showed that MCs content in invertebrates depended on the toxic level in their food sources Zhang et al, 2007). Hence, we deduce that the relationship between intracellular toxin content and hepatopancreas toxin content is probably linked to the settling of cyanobacteria from the water column.…”

Section: Discussionmentioning

confidence: 99%

Spatial and temporal variations of microcystins in hepatopancreas of a freshwater snail from Lake Taihu

Zhang

Xie

Liu

et al. 2009

Ecotoxicology and Environmental Safety

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Spatial and temporal variations of microcystins in hepatopancreas of a freshwater snail from Lake Taihu

Zhang

Xie

Liu

et al. 2009

Ecotoxicology and Environmental Safety

View full text Add to dashboard Cite

“…It is also pointed out that the concentration of metals in an organism is not necessarily an indication of the level of concentration in the water column. According to Elder and Collins (1991), bioaccumulation and toxicity are extremely situation dependent; therefore, concentration levels should not be extrapolated from one particular area to other situations where the biological species or environmental conditions are different. That even within one species, individual characteristics such as size, life stage, sex, and genotype can have significant effects on responses to contaminants.…”

Section: Discussionmentioning

confidence: 99%

“…Many research interests have been generated on the integrity of aquatic environment especially as it concerns heavy metal pollution (Rashed, 2001;Tawari-Fufeyin and Ekaye, 2007;Yilmag, 2007;Yilmag et al, 2009). As Elder and Collins (1991) pointed concentration of metals in an organisms cannot be extrapolated from place to place due to differences in individual organisms and environmental characters, we work to investigate the concentration of some metals in Malletia cumingii in Okpon River.…”

Section: Introductionmentioning

confidence: 99%

“…The quantity of metals absorbed and maintained in an organisms' body depends on a lot of factors as was explained by Cheng (1987), Elder and Collins (1991), Ayotunde et al (2012) and Oehlman and Schulte-Oehlman (2003) to include; concentrations and chemical characteristics of water, ecological needs, metabolism and feeding patterns of organism tolerance, size, life stages, species, organic substances, pH, temperature, alkalinity, hardness, inorganic ligands, interactions, sediments and season. These factors can equally alter metal toxicity in the aquatic environment substantially by causing attenuating effect.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Some Metal Elements Concentration in <i>Malletia cumingii</i> (Hanley, 1860) (Bivalvia) in Okpon River, Cross River State, Nigeria

Ada

Asira²

2017

ija

View full text Add to dashboard Cite

Molluscs are important food item all over the globe. They have been harvested from the wild and some cultured for food; such that 20% of aquatic animal protein comes from molluscs. They have also been widely used as indicator of pollution. On the other hand, many are intermediate hosts of parasitic disease of many animals and man. Malletia cumingii is usually harvested in Okpon River, a tributary of Cross River in Cross River State of Nigeria. Because of the value of Molluscs as indicator of pollution, this species was analyzed to ascertain the metal elements concentration levels for reason that some of these metals are toxic to man. Samples were collected from three locations along the River. Sampling was done two times to include the two main seasons of the year (dry and wet seasons). The samples were oven-dried (MAMMART) at 100°C and were pounded in mortar to powder form. Metal concentrations were measured using flame photometer (RP 7) and atomic absorption spectro-photometer. Metals analyzed included Copper, Cadmium, Chromium, Iron, Manganese, Nickel, Lead, Zinc, Calcium and Magnesium at different wavelengths. Results showed that metal concentration was increasing from the upper reaches of the river downward except zinc. It was suggested that zinc have a point source in the upper reaches while others metals were added to the water body by anthropogenic activities. However, the concentration of the metals did not reach toxic level in the molluscs for human consumption.

show abstract

“…Several studies report that freshwater bivalves are excellent freshwater biomonitors of the ecosystem status, in particular as accumulators of metals and trace elements (Elder and Collins, 1991;Ravera et al 2003;Rodrigues et al 2012) and being exposed to suspended solids and turbulence (Aldridge et al 1987). Freshwater bivalves can also represent a great conservational tool because of their high longevity and particular sensitivity to water quality changes (Heller, 1990;Elder and Collins, 1991).…”

Section: Introductionmentioning

confidence: 99%

Phytoplankton composition of the water and gastrointestinal tract of the mussel Diplodon enno (Ortmann, 1921) from São Francisco river (Bahia, Brazil)

Alves

Lima

et al. 2016

Braz. J. Biol.

View full text Add to dashboard Cite

The knowledge on diet composition of the freshwater mussel Diplodon enno (Ortmann) would aid in its culture and propagation allowing, this way, the replacement of natural endangered populations in Brazil. Microalgae are the main food source for captive mussels and unionids have displayed an ability to sort algae based on the cellular characteristics prior to ingestion. The main objective of the present work is to analyze the phytoplankton composition of the water from and of the gastrointestinal contents of the mussel D. enno, as an initial step for development of a suitable rearing diet. Therefore, water samples and bivalve specimens were collected from S. Francisco River, city of Paulo Afonso, Bahia, Brazil. The microalgal composition found in water and stomach/gut content samples was very diverse being represented by the following divisions: Cyanophyta, Chlorophyta, Dinophyta and Heterokontophyta (Diatoms). Concerning the relative abundance of microalgae divisions, it is possible to state, for the water and gastrointestinal contents, that Cyanophyta represents 15% and 14%, Chlorophyta 54% in both, Heterokontophyta 31% and 27% and Dinophyta 0% and 5%, respectively. According to the Brazilian CETESB criteria for phytoplankton species classification, 50% of Cyanophyta and 15% of Chlorophyta species observed in the water samples were classified as "very frequent", as were 68% of Heterokontophyta and 33% of Chlorophyta species in the gut/stomach tract samples. Focusing at a species level, although in the water only Coelastrum sp. and Chroococcus sp. were observed in 100% and 75% of the samples, respectively, in the gastrointestinal tract the species Staurastrum sp., Aulacoseira sp., Scenedesmus sp. and Fragilaria crotonensis occurred in 80% to 100% of the samples. The present results showed that D. enno feeds not only on small chlorophytes microalgae, due to their convenient size that facilitates higher feeding rates, but also on large size diatoms, due to a possible nutritional advantage for the bivalves. Thus, a diet composed by large diatoms and small chlorophytes microalgae may be considered as the most reasonable for the maintenance of D. enno populations.Keywords: phytoplankton, gastrointestinal tract, Diplodon enno, São Francisco River. Composição fitoplanctônica da água e do trato gastrointestinal do moluscoDiplodon enno (Ortmann) do rio São Francisco (BA -Brasil) ResumoO conhecimento da composição da dieta do molusco de água doce Diplodon enno é de extrema importância para a sua cultura e propagação, permitindo desta forma a recuperação de populações em perigo de extinção no Brasil.As microalgas são a principal fonte de alimento para moluscos filtradores e os uniónidos sendo selecionadas por estes com base nas suas características celulares. O principal objectivo deste trabalho é analisar a composição fitoplanctônica da água e do conteúdo gastrointestinal do molusco D. enno, de forma a desenvolver uma dieta apropriada ao seu cultivo. Para isso, amostras de água e espécimes de bivalves foram recolh...

show abstract

Freshwater Molluscs as Indicators of Bioavailability and Toxicity of Metals in Surface-Water Systems

Cited by 86 publications

References 133 publications

Spatial and temporal variations of microcystins in hepatopancreas of a freshwater snail from Lake Taihu

Spatial and temporal variations of microcystins in hepatopancreas of a freshwater snail from Lake Taihu

Some Metal Elements Concentration in <i>Malletia cumingii</i> (Hanley, 1860) (Bivalvia) in Okpon River, Cross River State, Nigeria

Phytoplankton composition of the water and gastrointestinal tract of the mussel Diplodon enno (Ortmann, 1921) from São Francisco river (Bahia, Brazil)

Contact Info

Product

Resources

About