Effect of In Ovo Exposure to PCBs and Hg on Clapper Rail Bone Mineral Chemistry from a Contaminated Salt Marsh in Coastal Georgia

Rodríguez‐Navarro, Alejandro B.; Romanek, Christopher S.; Álvarez‐Lloret, Pedro; Gaines, Karen F.

doi:10.1021/es060769x

Cited by 36 publications

(10 citation statements)

References 21 publications

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“…carbonates; v 1 , v 3 PO 4 : phosphates; Boskey and Mendelsohn, 2005;Rodriguez-Navarro et al, 2006). Overlapping peaks were resolved and their integrated areas measured using specifically designed curve fitting software.…”

Section: Infrared Spectrometrymentioning

confidence: 99%

“…This ratio increases as the bone mineral matures (Rey et al, 1989;Donnelly et al, 2010). 3) Total carbonate relative to mineral content (MinCO 3 _1415) determined as the ratio of the main carbonate band (v 3 CO 3 ; 1390-1440 cm -1 ) to the main phosphate (900 -1200 cm -1 ) band area ratio which decreases as bone mineral matures (Ou-Yang et al, 2001;Rodriguez-Navarro et al, 2006); Additionally, we evaluate the total amount of carbonate relative to organic matrix (CO 3 _a1415/AmideI) as the peak area ratio of the main carbonate band to the amide I band. 4) The mineral crystallinity index (CI) determined as the area ratio between phosphate sub-bands 1030 and 1020 cm -1 which increases as the mineral crystal size and perfection increases (Donnelly et al, 2010).…”

Section: Infrared Spectrometrymentioning

confidence: 99%

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Influence of physical activity on tibial bone material properties in laying hens

Rodríguez‐Navarro

McCormack

Fleming

et al. 2018

Journal of Structural Biology

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Laying hens develop a type of osteoporosis that arises from a loss of structural bone, resulting in high incidence of fractures. In this study, a comparison of bone material properties was made for lines of hens created by divergent selection to have high and low bone strength and housed in either individual cages, with restricted mobility, or in an aviary system, with opportunity for increased mobility. Improvement of bone biomechanics in the high line hens and in aviary housing was mainly due to increased bone mass, thicker cortical bone and more medullary bone. However, bone material properties such as cortical and medullary bone mineral composition and crystallinity as well as collagen maturity did not differ between lines. However, bone material properties of birds from the different type of housing were markedly different. The cortical bone in aviary birds had a lower degree of mineralization and bone mineral was less mature and less organized than in caged birds. These differences can be explained by increased bone turnover rates due to the higher physical activity of aviary birds that stimulates bone formation and bone remodeling. Multivariate statistical analyses shows that both cortical and medullary bone contribute to breaking strengthThe cortical thickness was the single most important contributor while its degree of mineralization and porosity had a smaller contribution. Bone properties had poorer correlations with mechanical properties in cage birds than in aviary birds presumably due to the greater number of structural defects of cortical bone in cage birds.

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Section: Infrared Spectrometrymentioning

confidence: 99%

Section: Infrared Spectrometrymentioning

confidence: 99%

Influence of physical activity on tibial bone material properties in laying hens

Rodríguez‐Navarro

McCormack

Fleming

et al. 2018

Journal of Structural Biology

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“…Treatment with DMSA decreased this ratio considerably. Rodriguez-Navarro et al (2006) have also noticed significantly greater Ca/P ratio in bones from the contaminated site than in the reference site. Rey et al (1991) have reported that the decrease in the crystallinity of the bone was due to a decrease in carbonate and phosphate concentration.…”

Section: Resultsmentioning

confidence: 66%

The study of the changes in the biochemical and mineral contents of bones of Catla catla due to lead intoxication

Palaniappan

Krishnakumar

Vadivelu

et al. 2009

Environmental Toxicology

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In the present study, an attempt has been made to analyze the changes in the biochemical and mineral contents of lead-intoxicated bones of Catla catla at subchronic (15.5 ppm) exposure, and also to determine whether the effects of Pb intoxication can be reversed with the chelating agent meso 2, 3-dimercaptosuccinic acid (DMSA) on the bones of freshwater fingerlings Catla catla by using Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), and atomic absorption spectrophotometer techniques. The FT-IR spectra of the lead-exposed bones show significant alteration in the biochemical constituents. The XRD analysis showed a decrease in crystallinity due to lead exposure. Further, the Ca, Mg, and P contents of the lead-exposed bones were less than those of the control group, and there was an increase in the mineral contents of the bones after DMSA treatment. In conclusion, the present study suggests that the subchronic lead exposure results in severe loss of bone minerals. The overall decrease in the FT-IR band intensity of Pb-exposed bones relative to the control indicates a decrease in the biochemical constituents like proteins and lipids. The increase in the band intensity after treatment with chelating agent DMSA indicates increased biochemical constituents, showing that the subchronic effects of lead can be reversed by DMSA. The amide I bands observed at 1654 cm(-1) in the present study suggest that the protein is dominated by alpha-helical structure.

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“…However, for some of these species, information on diet composition remains largely ancillary (based on gut content analysis and cast pellets), a situation particularly true for the clapper rail (Rallus longirostris). Despite limited understanding of the clapper rail's diet, this species has been suggested as an indicator of tidal marsh ecosystem integrity (Novak et al 2005), specifically, as bioindicators of contaminant dynamics through food webs (Rodriguez-Navarro et al 2006;Cumbee et al 2008). Collectively, these studies assume fiddler crabs (genus Uca) are the clapper rail's principle prey item within northern Gulf of Mexico estuaries (Heard 1982a;citations in Eddleman and Conway 1998).…”

Section: Introductionmentioning

confidence: 99%

Trophic Relationships of a Marsh Bird Differ Between Gulf Coast Estuaries

Rush

Olin

Fisk

et al. 2010

Estuaries and Coasts

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Much of North America's tidal marsh habitat has been significantly altered by both natural and man-made processes. Thus, there is a need to understand the trophic ecology of organisms endemic to these ecosystems. We applied carbon (δ 13 C) and nitrogen (δ 15 N) stable isotope analysis, along with isotope mixing models, to egg yolk, liver, and muscle tissues of clapper rails (Rallus longirostris) and their likely prey items. This analysis enabled us to explore variation in trophic niche and diet composition in this important marsh bird in two northern Gulf of Mexico tidal marshes that are river and ocean-dominated. For the riverassociated estuary, δ 13 C and δ 15 N of egg yolks, liver, and pectoral muscle tissue samples provided evidence that clapper rails maintained a similar diet during both the winter and the breeding season. A trophic link between C 3 primary productivity and the clapper rail's diet was also indicated as the δ 13 C of clapper rail egg yolks related negatively with the aerial cover of C 3 macrophytes. Clapper rails from the ocean-dominated estuary had a narrower trophic niche and appeared to be utilizing marine resources, particularly, based on modeling of liver stable isotope values. Variation in stable isotope values between egg yolk and liver/muscle in both systems suggests that endogenous resources are important for egg production in clapper rails. These results demonstrate that diet composition, prey source, and niche width of clapper rails can vary significantly across different estuaries and appear to be influenced by hydrological conditions.

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Effect of In Ovo Exposure to PCBs and Hg on Clapper Rail Bone Mineral Chemistry from a Contaminated Salt Marsh in Coastal Georgia

Cited by 36 publications

References 21 publications

Influence of physical activity on tibial bone material properties in laying hens

Influence of physical activity on tibial bone material properties in laying hens

The study of the changes in the biochemical and mineral contents of bones of Catla catla due to lead intoxication

Trophic Relationships of a Marsh Bird Differ Between Gulf Coast Estuaries

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