Comparison of Metal Uptake Rate and Absorption Efficiency in Marine Bivalves

Wang, Wen‐Xiong

doi:10.1897/1551-5028(2001)020<1367:comura>2.0.co;2

Cited by 35 publications

(56 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, the uptake rate constants for metals in fish are 1 to 2 orders of magnitude lower than those quantified in suspension-feeding invertebrates. For example, the uptake rate constants for metals in mussels are 0.180 to 0.182, 0.019 to 0.031 and 0.350 to 0.483 l g -1 d -1 for Cd, Se and Zn, respectively (Wang 2001). This higher uptake rate constant in bivalves may primarily be due to the high clearance rate and the large permeable area of the gills and mantle.…”

Section: Discussionmentioning

confidence: 99%

Exposure and potential food chain transfer factor of Cd, Se and Zn in marine fish Lutjanus argentimaculatus

Xu¹,

Wang

2002

Mar. Ecol. Prog. Ser.

123

115

View full text Add to dashboard Cite

Radiotracer techniques were employed to quantify the rates of uptake from aqueous and dietary sources, and rates of elimination of Cd, Se and Zn by a marine predatory fish, the mangrove snapper Lutjanus argentimaculatus. The relative significance of bioaccumulation of metals by fish from water and food and the food chain transfer factor were then assessed using a kinetic modeling approach. Cd and Zn in the aqueous phase exhibited an approximately linear uptake pattern over a 1 to 2 d exposure, whereas Se exhibited a 2-compartmental uptake at a low ambient concentration, with a slow initial uptake followed by a rapid increase in Se influx. Most of the accumulated aqueous Se and Zn were incorporated into the muscles, whereas Cd was evenly distributed in the viscera and the remaining tissue, with a lower proportion in the gills. The influx rates were dependent on the ambient metal concentration and were tissue-specific for each metal. The assimilation efficiency of trace metals in fish ingesting different prey (copepods, Artemia sp. and clam tissue) ranged from 6 to 24% for Cd, 32 to 68% for Se and 15 to 46% for Zn, and decreased with an increase in ingestion rate. The efflux rate constant of Cd in fish following uptake from the dietary phase (0.047 d -1 ) was higher than that following aqueous uptake (0.025 d -1 ), whereas the efflux rate constants of Se and Zn were comparable between these 2 exposure pathways. Our modeling calculations indicate that dietary uptake of Cd and Zn dominates their accumulation in fish when zooplankton are the main prey, whereas aqueous uptake may be the dominant pathway when planktivorous fish are the dominant prey for the predatory fish. Dietary uptake always dominates Se accumulation in these fish. The modeling results also indicated that the food chain transfer factor of Cd was < 0.5 in the fish regardless of the ingestion rate and the assimilation efficiency, consistent with the results of field studies. However, Se and Zn may potentially be biomagnified when the ingestion rate and assimilation efficiency are at the high end of the range possibly encountered by the predatory fish. KEY WORDS: Metals · Mangrove snapper · Exposure · Food chain · Uptake Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 238: [173][174][175][176][177][178][179][180][181][182][183][184][185][186] 2002 2001). Organ specificity in metal accumulation may also be related to the metal speciation and the regulation of essential and non-essential metals (Hanson 1997, Baskin 2000, McGeer et al. 2000, Burgos & Rainbow 2001. Although most studies have quantified the metal concentrations in fish collected from the field, where they are exposed to metals both in the aqueous and in the dietary phases, it is difficult to quantitatively distinguish the metal uptake via food or water. Such information is useful for modeling metal transport within marine food chains and the interaction between fish and their environments.Recently, the kinetic modeling approach ha...

show abstract

Section: Discussionmentioning

confidence: 99%

Exposure and potential food chain transfer factor of Cd, Se and Zn in marine fish Lutjanus argentimaculatus

Xu¹,

Wang

2002

Mar. Ecol. Prog. Ser.

123

115

View full text Add to dashboard Cite

show abstract

“…Diante destas dificuldades, um novo conceito sobre a bioacumulação está sendo desenvolvido baseando-se na biocinética ou modelo de bioacumulação cinética 33 . Este modelo supõe que o processo de bioacumulação é o resultado do balanço de três mecanismos: taxa de entrada pela dieta, taxa de entrada por formas diversas e taxa de perdas pelo organismo 19 .…”

Section: Contribuição Do Consumo De Carne De Siri Na Ingestão Diária unclassified

Avaliação de contaminação por metais pesados em amostras de siris azuis

Virga¹,

Geraldo²,

Santos³

2007

Ciênc. Tecnol. Aliment.

View full text Add to dashboard Cite

ResumoMetais pesados por não serem biodegradáveis podem se acumular nos tecidos vivos ao longo da cadeia alimentar chegando ao ser humano principalmente por meio da alimentação. Siris e outros organismos que se alimentam de matéria orgânica existente em sistemas aquáticos, podem absorver uma carga maior destes elementos tóxicos e assim, representar um risco potencial à saúde da população da região. Neste trabalho, foram realizados estudos quantitativos sobre o teor de Pb, Cd, Cr, Zn e Cu em amostras (n = 144) de siris azuis do gênero Callinectes sp., coletados ao longo do rio Cubatão, utilizando um Espectrofotômetro de Absorção Atômica por Chama (FSAA). Exceto para o Cr, onde o valor médio obtido neste trabalho ficou acima do estabelecido para qualquer tipo de alimento pela legislação brasileira, todos os outros resultados estiveram abaixo dos limites máximos recomendados por agências de saúde. Uma discussão é apresentada sobre a contribuição ao valor provisório de ingestão diária tolerável (PTDI), sugerido pela Organização Mundial de Saúde, devido ao consumo de carne de siri pela população. Palavras-chave: metal pesado; contaminação; siri-azul; Callinectes sp.; espectrometria por absorção atômica. AbstractBecause they are nonbiodegradable, heavy metals can accumulate in the living tissues along the food chain, reaching humans mainly through food. Swimming crabs and other organisms which feed on organic matter that is present in aquatic systems can ingest high loads of these toxic elements; hence, they pose a potential risk to the health of regional populations. This work involved a quantitative analysis of Pb, Cd, Cr, Zn and Cu in blue crab specimens of the genus Callinectes sp. (n = 144) collected along the Cubatão river, using Flame Atomic Absorption Spectrophotometry (FAAS). Except for Cr, whose average value exceeded the limit allowed for any type of food by Brazilian regulations, all the other elements fell below the maximum content recommended by health agencies. This paper also discusses the contribution of crab meat consumed by the population to the provisional tolerable daily intake (PTDI) suggested by the World Health Organization.

show abstract

“…The temperature might increase metal uptake rate by both increasing the metabolic rate and decreasing viscosity, which control the clearance rate of bivalves. Wang (2001) showed the significant relationship between the inter-specific clearance rates and metal uptake rates of various bivalves, while no significant relationship between the intra-specific clearance rates and metal uptake rates of each bivalve species observed in his study.…”

Section: Influx From the Dissolved Phasementioning

confidence: 77%

Effects of salinity, temperature and food type on the uptake and elimination rates of cd, cr, and zn in the asiatic clamcorbicula fluminea

Lee

2005

Ocean Sci. J.

View full text Add to dashboard Cite

− Laboratory radiotracer experiments were conducted to determine assimilation efficiencies (AE) from ingested algal food and oxic sediment particles, uptake rates from the dissolved phase, and the efflux rates of Cd, Cr and Zn in the Asiatic clam Corbicula fluminea. Among three elements, AE from both algal and sediment food was greatest for Cd, followed by Zn and Cr. The AEs of tested elements from algal food (Phaeodactylum tricornutum) were consistently higher than those from sediments at a given salinity and temperature. The influence of salinity (0, 4 and 8 psu) and temperature (5, 13 and 21 o C) on the metal AEs was not evident for most tested elements, except Cd AEs from sediment. The rate constant of metal uptake from the dissolved phase (k u ) was greatest for Cd, followed by Zn and Cr in freshwater media. However, in saline water, the k u of Zn were greater than those of Cd. The influx rate of all tested metals increased with temperature. The efflux rate constant was greatest for Cr (0.02 d ). The efflux rate constant for Zn in clam tissues depurated in 0 psu (0.017 d −1 ) was faster than that in 8 psu (0.010 d −1 ). Overall results showed that the variation of salinity and temperature in estuarine systems can considerably influence the metal bioaccumulation potential in the estuarine clam C. fluminea. The relatively high Cd accumulation capacity of C. fluminea characterized by the high AE, high dissolved influx rate and low efflux rate, suggested that this clam species can be used as an efficient biomonitor for the Cd contamination in freshwater and estuarine environments.

show abstract

Comparison of Metal Uptake Rate and Absorption Efficiency in Marine Bivalves

Cited by 35 publications

References 26 publications

Exposure and potential food chain transfer factor of Cd, Se and Zn in marine fish Lutjanus argentimaculatus

Exposure and potential food chain transfer factor of Cd, Se and Zn in marine fish Lutjanus argentimaculatus

Avaliação de contaminação por metais pesados em amostras de siris azuis

Effects of salinity, temperature and food type on the uptake and elimination rates of cd, cr, and zn in the asiatic clamcorbicula fluminea

Contact Info

Product

Resources

About