Intraspecific comparisons of metal bioaccumulation in the juvenile Atlantic silverside Menidia menidia

Dutton, Jessica; Fisher, Nicholas S.

doi:10.3354/ab00276

Cited by 18 publications

(20 citation statements)

References 66 publications

(159 reference statements)

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“…Our AE value of 82% could be slightly lower because the sheepshead minnows were fed naturally, whereas the killifish used in the present study were intubated. The Cd, Hg(II), and MeHg AE values calculated from the present study fall within the range of literature values for freshwater and marine fish fed zooplankton and worm prey (2.7−39%, 8−51%, and 56−95%, respectively) (Reinfelder & Fisher 1994, Ni et al 2000, Xu & Wang 2002, Wang & Wong 2003, Pickhardt et al 2006, Mathews & Fisher 2008, Dutton & Fisher 2010 19%;Ni et al 2000, Dutton & Fisher 2011. The large range in AE values from algae observed among the metals could be due to varying cellular distributions of the metals in Dunaliella tertiolecta cells.…”

Section: Assimilation Of Metals After Algal Intubationsupporting

confidence: 64%

“…The tissue distribution of Hg(II) and MeHg presented in our study are comparable to other literature values. For Hg(II), Pickhardt et al (2006) found that 92 to 96% of Hg(II) was associated with the viscera in mosquitofish Gambusia affinis and 67.5 to 73% in redear sunfish Lepo mis microlophus, 28 to 72% was associated with the viscera in the Atlantic silverside (Dutton & Fisher 2010), and 81 to 84% was associated with the viscera in another killifish study (Dutton & Fisher 2011). For MeHg, 54% of MeHg was associated with the body in the redear sunfish and 68% in mosquitofish (Pickhardt et al 2006), 51 to 57% in the Atlantic silverside (Dutton & Fisher 2010), and 51 to 58% in 2 other killi fish studies (Mathews & Fisher 2008, Dutton & Fisher 2011, which are comparable but slightly higher than our values of 42 to 49%.…”

Section: Tissue Distribution Of Metalsmentioning

confidence: 99%

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Bioavailability of sediment-bound and algal metals to killifish Fundulus heteroclitus

Dutton¹,

Fisher²

2012

Aquat. Biol.

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We used a radiotracer technique to experimentally assess whether As(V), Cd, Cr(III), Hg(II), and methylmercury (MeHg) bound to sediment from 3 contaminated field sites (Baltimore Harbor, Elizabeth River, and Mare Island) and the green alga Dunaliella tertiolecta are bioavailable to killifish Fundulus hetero clitus. Algae are a component of the killifish diet in salt marshes, and although killifish do not actively consume sediment, some is accidentally ingested due to attachment to benthic prey. For both sediment and algae, the assimilation efficiencies (AE) of ingested metals were highest for MeHg, followed by Hg(II), As, and Cd, and lowest for Cr. Following sediment intubations, AE values ranged from 0.01−0.03% (Cr) to 10−14% (MeHg), and ranged from 0.7% (Cr) to 82% (MeHg) following algal intubation. Following sediment intubations, loss rate constants (k ef ) were similar for As, Cd, and Hg(II) and lowest for MeHg, whereas following algal intubation, the k ef values were highest for As, followed by Cr, Hg(II), and Cd, and lowest for MeHg. At the end of depuration, tissue distribution data showed that Cd and Hg(II) remained primarily associated with the viscera, whereas As and MeHg were distributed throughout the body. Calculated trophic transfer factors (TTF) showed that only MeHg bound to algae, and Elizabeth River sediment is expected to biomagnify at this trophic step (TTF > 1). Metals can accumulate to high concentrations in sediment in industrialized coastal areas, but the present study indicates that the risk of exposure for killifish from ingesting contaminated sediment is minimal.

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Section: Assimilation Of Metals After Algal Intubationsupporting

confidence: 64%

Section: Tissue Distribution Of Metalsmentioning

confidence: 99%

Bioavailability of sediment-bound and algal metals to killifish Fundulus heteroclitus

Dutton¹,

Fisher²

2012

Aquat. Biol.

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“…Higher growth efficiencies mean that fish can form more tissue per unit of ingested food, which would result in lower MeHg burdens (Harris and Bodaly 1998, Trudel and Rasmussen 2006, Ward et al 2010) contrary to the direction of our observed latitudinal MeHg gradient. Finally, the latitudinal increase in food conversion efficiency likely has an important corollary, i.e., high latitude fish are also more efficient MeHg assimilators (Dutton and Fisher 2010), given that they retain more MeHg per unit food in their bodies. We conclude that higher ingestion rates and higher MeHg assimilation efficiencies outweigh higher growth efficiencies in higher vs. lower latitude silverside populations, thus producing the latitudinal increase in juvenile [MeHg] observed in this study.…”

Section: Discussionmentioning

confidence: 99%

“…1978, Karimi et al 2016) also affect MeHg bioaccumulation. Assimilation of inorganic forms of dietary Hg, on the other hand, is thought to be negligible (<15%) given the much faster turnover rate of assimilated inorganic Hg compared to MeHg (Dutton and Fisher 2010). Overall, MeHg bioaccumulation is the net result of interacting physiological processes and environmental factors.…”

Section: Introductionmentioning

confidence: 99%

“…According to the growth dilution hypothesis (Trudel and Rasmussen, 2006) MeHg concentrations in fish are inversely related to growth efficiency, thus predicting declining MeHg concentrations with latitude in M. menidia populations. On the other hand, a higher assimilation efficiency of MeHg and slower loss in northern compared to southern M. menidia populations (Dutton and Fisher 2010) may attenuate or reverse this pattern. Given the counteracting influences of ingestion, growth efficiency, and MeHg assimilation, the goal of the present study was to measure and then examine latitudinal patterns in MeHg concentrations M. menidia in both the juveniles and adults.…”

Section: Introductionmentioning

confidence: 99%

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Mercury bioaccumulation increases with latitude in a coastal marine fish (Atlantic silverside,Menidia menidia)

Baumann

Conover

Balcom³

et al. 2017

Can. J. Fish. Aquat. Sci.

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Human exposure to the neurotoxic methylmercury (MeHg) occurs primarily via the consumption of marine fish, but the processes underlying large-scale spatial variations in fish MeHg concentrations [MeHg], which influence human exposure, are not sufficiently understood. We used the Atlantic silverside (Menidia menidia), an extensively studied model species and important forage fish, to examine latitudinal patterns in total Hg [Hg] and [MeHg]. Both [Hg] and [MeHg] significantly increased with latitude (0.014 and 0.048 μg MeHg g−1 dw per degree of latitude in juveniles and adults, respectively). Four known latitudinal trends in silverside traits help explain these patterns: latitudinal increase in MeHg assimilation efficiency, latitudinal decrease in MeHg efflux, latitudinal increase in weight loss due to longer and more severe winters, and latitudinal increase in food consumption as an adaptation to decreasing length of the growing season. Given the absence of a latitudinal pattern in particulate MeHg, a diet proxy for zooplanktivorous fish, we conclude that large-scale spatial variation in growth is the primary control of Hg bioaccumulation in this and potentially other fish species.

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Actinide Speciation and Bioavailability in Fresh and Marine Waters

Markich¹,

Brown²

2018

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The actinides comprise a group of 15 metals (with atomic numbers ranging from 89 to 103) that are all radioactive and occur as cations in natural surface waters. Only the first 10 actinides are covered in this study, as these are the most environmentally relevant, where the dominant oxidation states are as follow: actinium(III), thorium(IV), protactinium(V), uranium(VI), neptunium(V), plutonium(IV) and (V), americium(III), curium(III), berkelium(III), and californium(III). The physicochemical form, or speciation, of an actinide (e.g., free metal ion, or complexes with inorganic or organic ligands) in natural surface waters can be determined using a range of analytical techniques. However, such methods are seldom commercially available and rarely determine a complete distribution of all metal species. A complementary approach, which is more cost effective, time efficient, and predictive, is the application of geochemical speciation modeling, which calculates the percentage distribution of all actinide species based on known or postulated chemical reactions. The general consensus is that geochemical speciation models can provide useful results if applied correctly with an understanding of the differences between simulated and real systems. This is the first study to use an internally consistent equilibrium database within a geochemical model (WHAM) to calculate the speciation of the first 10 actinides across fresh, estuarine, and marine waters that incorporates natural dissolved organic matter (DOM) (i.e., fulvic acid). The speciation of a metal (actinide) largely governs its uptake and/or toxicity (bioavailability) in aquatic organisms. The general consensus is that bioavailability is best predicted by the concentration of the free metal ion (M z+ ) and that metals complexed with most inorganic ligands (e.g., carbonate or sulfate) or natural DOM, typically have low bioavailability. There is also evidence to suggest that colloidal thorium is bioavailable to freshwater organisms. The study correlates observed actinide speciation with bioavailability (where available) or utilizes predicted actinide speciation to determine the likely magnitude of bioavailability, as applied to aquatic organisms. This study also addresses the likely effects of global ocean acidification and increased natural DOM concentrations in fresh surface waters on actinide speciation and bioavailability.

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Intraspecific comparisons of metal bioaccumulation in the juvenile Atlantic silverside Menidia menidia

Cited by 18 publications

References 66 publications

Bioavailability of sediment-bound and algal metals to killifish Fundulus heteroclitus

Bioavailability of sediment-bound and algal metals to killifish Fundulus heteroclitus

Mercury bioaccumulation increases with latitude in a coastal marine fish (Atlantic silverside,Menidia menidia)

Actinide Speciation and Bioavailability in Fresh and Marine Waters

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