Trophic accumulation and depuration of mercury by blue crabs (Callinectes sapidus) and pink shrimp (Penaeus duorarum)

Evans, David W.; Kathman, R. Deedee; Walker, William W.

doi:10.1016/s0141-1136(99)00083-5

Cited by 35 publications

(23 citation statements)

References 16 publications

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“…Genetic resistance to inorganic Hg has been reported for this species, which may be related to detoxification and storage (by way of metallothionein-like proteins or metal-rich granules) or to accumulation and subsequent loss of metal through autotomy of caudal segments (Klerks and Bartholomew 1990;Horne 2003a, 2003b). Penaeid shrimp, fed field-exposed Hg-contaminated fish tissue, accumulated tissue Hg concentrations after 2 weeks of feeding that were approximately 17 times greater (approximately 1.7 lg g -1 wet wt) than for grass shrimp fed contaminated worms in the present work (Evans et al 2000).…”

Section: Discussioncontrasting

confidence: 41%

“…Data that did not fit a normal distribution were analyzed using Spearman rank correlation (r s ) AE-203 Hg% by field-collected shrimp fed laboratorycontaminated amphipod prey (exposed to approximately 0.005 lM dissolved Hg) was greater (approximately 61-78 %) than the maximum value observed for Hg pre-exposed shrimp (Seebaugh and Wallace 2009). Hg assimilation by penaeid shrimp fed field-contaminated fish tissue was approximately 72 % (Evans et al 2000). There was, however, overlap between the range of AE-109 Cd% values (approximately 54-75 %) for field-collected shrimp after consumption of amphipods (exposed to approximately 0.025 lM dissolved Cd) and values in the present study (Seebaugh and Wallace 2009).…”

Section: Discussionmentioning

confidence: 99%

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Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

Seebaugh

Wallace

Lamoreaux

et al. 2012

Arch Environ Contam Toxicol

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Grass shrimp Palaemonetes pugio were fed mercury (Hg)-contaminated oligochaetes for 15 days and analyzed for Hg, cadmium (Cd), and carbon assimilation efficiencies (AE) as well as toxicological end points related to digestion. Disproportionate increases in stable Hg concentrations in shrimp did not appear to be related to partitioning to trophically available Hg in worms. Hg AE by pre-exposed shrimp reached a plateau (approximately 53 %), whereas Cd AE varied (approximately 40-60 %) in a manner that was not dose-dependent. Carbon AE did not differ among treatments (approximately 69 %). Gut residence time was not impacted significantly by Hg pre-exposure (grand median approximately 465 min), however, there was a trend between curves showing percentages of individuals with markers in feces over time versus treatment. Feces-elimination rate did not vary with dietary pre-exposure. Extracellular protease activity varied approximately 1.9-fold but did not exhibit dose-dependency. pH increased over the range of Hg pre-exposures within the anterior (pH approximately 5.33-6.51) and posterior (pH approximately 5.29-6.25) regions of the cardiac proventriculus and Hg assimilation exhibited a negative relationship to hydrogen ion concentrations. The results of this study indicate that previous Hg ingestion can elicit post-assimilatory impacts on grass shrimp digestive physiology, which may, in turn, influence Hg assimilation during subsequent digestive cycles.

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Section: Discussioncontrasting

confidence: 41%

Section: Discussionmentioning

confidence: 99%

Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

Seebaugh

Wallace

Lamoreaux

et al. 2012

Arch Environ Contam Toxicol

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“…Contribution from environmental contamination (namely the dissolved fraction) seems low, reflected by the reduced mercury burden in gill tissue. It is known that mercury biomagnifies along food webs (Watras and Bloom, 1992;Lawson and Mason, 1998) and that higher trophic level organisms accumulate mercury mostly from food (Evans et al, 2000), hence even in low contamination areas dietary items will be enriched in mercury, and mainly in organic form, which is the most prone to bioaccumulate (Lawson and Mason, 1998).…”

Section: Discussionmentioning

confidence: 99%

“…This species is one of the most important and exploited natural resources in temperate estuarine systems, and therefore represent a major pathway for Human contamination. Most of the previous research on this species consist of laboratory studies, focusing on mercury mediated osmoregulatory impairment (Péqueux et al, 1996), the combined effects of salinity and pH on the bioaccumulation of mercury (Laporte et al, 1997) or feeding experiments using mercury contaminated food (Evans et al, 2000). Studies on a different decapod crustacean, the blue crab, focused on the transport mechanisms and fluxes of mercury across the membranes (gills and intestine) and suggest that inorganic and organic mercury uptake into the gills and intestine of this invertebrate is by a variety of pathways, both active and passive Laporte et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Pattern and pathways for mercury lifespan bioaccumulation in Carcinus maenas

Coelho

Reis

Ventura

et al. 2008

Marine Pollution Bulletin

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a b s t r a c tCarcinus maenas is an important and exploited natural resource in temperate estuaries, being consumed by local populations and also used as fish bait. Through bioaccumulation and bioamplification processes occurring in polluted estuarine ecosystems, this species may directly or indirectly represent a major pathway for Human contamination. No information is available on the overall lifespan bioaccumulation pattern of mercury for this species, which would be an invaluable tool for assessing the risks associated with C. maenas harvest in contaminated areas. Taking that in mind, the main objectives of this work were to clarify the lifespan bioaccumulation pattern of mercury for this species. A consistent lifespan accumulation pattern was found for this species, both for total and organic mercury, and coherent differences were found between genders, suggesting different physiological responses to contamination. From our results two scenarios emerge: (a) for low mercury contamination areas where the diet is the major pathway for metal uptake, with higher levels in muscle and hepatopancreas (twice as high as in gills) and higher organic mercury fractions (as high as 80-90% in muscle), crabs bioaccumulate with age and (b) on high contaminated areas, environmental exposure is predominant, with higher levels found in gills (reaching 0.8 mg kg À1 ), lower organic fractions and no mercury increment with age. Detoxification strategies, dietary differences and species mobility may account for these two accumulation patterns.

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“…Major sources of human exposure to Hg are primarily from eating high levels of marine fish or inland fish raised in waters contaminated by the past industrial activities, such as chlorine production [32,33] and chronic inhalation of Hg gas associated with metal ore mining and processing (e.g. gold).…”

Section: Implication Of Environmental Factors In Autismmentioning

confidence: 99%

Oxidative Stress in Autism: Elevated Cerebellar 3-nitrotyrosine Levels

Sajdel-Sulkowska¹,

Lipiński²,

Windom³

et al. 2008

American J. of Biochemistry and Biotechnology

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It has been suggested that oxidative stress and/or mercury compounds play an important role in the pathophysiology of autism. This study compared for the first time the cerebellar levels of the oxidative stress marker 3-nitrotyrosine (3-NT), mercury (Hg) and the antioxidant selenium (Se) levels between control and autistic subjects. Tissue homogenates were prepared in the presence of protease inhibitors from the frozen cerebellar tissue of control (n=10; mean age, 15.5 years; mean PMI, 15.5 hours) and autistic (n=9; mean age 12.1 years; mean PMI, 19.3 hours) subjects. The concentration of cerebellar 3-NT, determined by ELISA, in controls ranged from 13.69 to 49.04 pmol g 1 of tissue; the concentration of 3-NT in autistic cases ranged from 3.91 to 333.03 pmol g 1 of tissue. Mean cerebellar 3-NT was elevated in autism by 68.9% and the increase was statistically significant (p=0.045). Cerebellar Hg, measured by atomic absorption spectrometry ranged from 0.9 to 35 pmol g 1 tissue in controls (n=10) and from 3.2 to 80.7 pmol g 1 tissue in autistic cases (n=9); the 68.2% increase in cerebellar Hg was not statistically significant. However, there was a positive correlation between cerebellar 3-NT and Hg levels (r=0.7961, p=0.0001). A small decrease in cerebellar Se levels in autism, measured by atomic absorption spectroscopy, was not statistically significant but was accompanied by a 42.9% reduction in the molar ratio of Se to Hg in the autistic cerebellum. While preliminary, the results of the present study add elevated oxidative stress markers in brain to the growing body of data reflecting greater oxidative stress in autism.

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Trophic accumulation and depuration of mercury by blue crabs (Callinectes sapidus) and pink shrimp (Penaeus duorarum)

Cited by 35 publications

References 16 publications

Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

Assimilation of Elements and Digestion in Grass Shrimp Pre-Exposed to Dietary Mercury

Pattern and pathways for mercury lifespan bioaccumulation in Carcinus maenas

Oxidative Stress in Autism: Elevated Cerebellar 3-nitrotyrosine Levels

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