Digestive toxicity in grass shrimp collected along an impact gradient

Seebaugh, David R.; Lamoreaux, William J.; Wallace, William G.

doi:10.1016/j.aquatox.2011.08.015

Cited by 17 publications

(13 citation statements)

References 60 publications

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“…In other studies, AE-14 C% was unresponsive to a pulse of Cd in meals or pre-exposure to dietary Cd for 15 days (Seebaugh 2010;Seebaugh et al 2012). Carbon assimilation by this species does not appear to be correlated with temperature, salinity, or gut transit time (Morgan 1980;Seebaugh et al 2011). AE-14 C% in the present work was, however, lower than values (82-83 %) reported previously (Morgan 1980;Seebaugh and Wallace 2009).…”

Section: Rate Of Casein Hydrolysis -P Pugiocontrasting

confidence: 80%

“…This phenomenon was also observed in shrimp subjected to chronic field exposure, where digestive plasticity may have played a role in maintaining nutrient assimilation (Seebaugh and Wallace 2009;Seebaugh et al 2011). In other studies, AE-14 C% was unresponsive to a pulse of Cd in meals or pre-exposure to dietary Cd for 15 days (Seebaugh 2010;Seebaugh et al 2012).…”

Section: Rate Of Casein Hydrolysis -P Pugiomentioning

confidence: 65%

“…TAM includes metal associated with specific intracellular components (i.e., metallothionein-like proteins, enzymes, and organelles) and may serve as an estimate of the dose of metal from ingested invertebrate tissues to P. pugio, subject to variability in digestion Wallace 2004, 2009;Seebaugh et al 2011). Relationships between AE by consumers and metal partitioning in their respective food organisms are, however, quite variable and must be evaluated on a case-by-case basis to determine if TAM can serve as reliable indicator of dietary metal dose (Rainbow et al 2011).…”

Section: Hg-contaminated Oligochaetesmentioning

confidence: 99%

“…Meals used to assess digestive toxicity in vivo were prepared with fluorescent or near-infrared markers in a gelatin matrix as described in previous work (Seebaugh et al 2011 and references therein). Minimum GRT was estimated for shrimp fed meals containing 0.5 lm diameter fluorescent microspheres as the first appearance of markers in feces to the nearest 30 min.…”

Section: Digestive Toxicitymentioning

confidence: 99%

“…Pre-assimilatory digestive toxicity results from solubilization and bioavailability of a pollutant in gut fluid and could potentially impact hydrolysis and absorption during a digestive cycle (Chen and Mayer 1998;Campbell et al 2005). Postassimilatory toxicity due to chronic exposure can influence digestive enzyme activities and gut fluid properties (e.g., pH) during subsequent cycles (Seebaugh et al 2011).…”

mentioning

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: Rate Of Casein Hydrolysis -P Pugiocontrasting

confidence: 80%

Section: Rate Of Casein Hydrolysis -P Pugiomentioning

confidence: 65%

Section: Hg-contaminated Oligochaetesmentioning

confidence: 99%

Section: Digestive Toxicitymentioning

confidence: 99%

mentioning

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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Crude oil toxicity to fiddler crabs (Uca longisignalis and Uca panacea) from the northern Gulf of Mexico: Impacts on bioturbation, oxidative stress, and histology of the hepatopancreas

Franco

Felgenhauer

Klerks

2017

Enviro Toxic and Chemistry

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The intensive drilling and extraction of fossil fuels in the Gulf of Mexico result in a considerable risk of oil spills impacting its coastal ecosystems. Impacts are more likely to be far-reaching if the oil affects ecosystem engineers like fiddler crabs, whose activities modify biogeochemical processes in the sediment. The present study investigated effects of oil on the fiddler crabs Uca longisignalis and Uca panacea, which are important as ecosystem engineers and as prey for a wide variety of species. The present study used mesocosms and microcosms to investigate the effects of crude oil on fiddler crab burrowing and to assess cellular and tissue damage by the oil. Fiddler crabs were exposed for periods of 5 or 10 d to oil concentrations up to 55 mg/cm on the sediment surface. Their burrowing was delayed, their burrows were smaller, and they transported less sediment in the presence of oil. The hepatopancreas had elevated levels of oxidative stress and a higher abundance of blister cells, which play a role in secretory processes. Interspecific differences were observed; most effects were strongest in U. panacea, though burrowing was more strongly affected in U. longisignalis. The present study demonstrates that crude oil is likely to impact fiddler crabs and many species that depend on them for their diet or for the ecological changes that result from their burrowing. Environ Toxicol Chem 2018;37:491-500. © 2017 SETAC.

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Feeding and Digestion

Weis

2013

Physiological, Developmental and Behavioral Effects of Marine Pollution

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Digestive toxicity in grass shrimp collected along an impact gradient

Cited by 17 publications

References 60 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

Crude oil toxicity to fiddler crabs (Uca longisignalis and Uca panacea) from the northern Gulf of Mexico: Impacts on bioturbation, oxidative stress, and histology of the hepatopancreas

Feeding and Digestion

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