Assessment of size-dependent mercury distribution in King Mackerel, Scomberomorus cavalla

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The assessment of health risks from fish contamination and the issuance of advisories require accurate characterizations of the actual contaminant concentrations in fish of every relevant size. Such characterizations should not only contain statistical measures of location and variation, but provide a complete parameterization of the contaminant distribution for each given size class. This paper proposes two methods for determining such distributions from scatter diagrams of contaminant concentration versus fish length and illustrates them with an analysis of mercury contaminant in king mackerel, Scomberomorus cavalla. The first method consists of fitting contamination data with a family of S-distributions. This family ... continued below

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8 p.

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Voit, E.O. & Balthis, W.L. December 31, 1994.

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  • Voit, E.O. Medical Univ. of South Carolina, Charleston, SC (United States). Dept. of Biometry and Epidemiology
  • Balthis, W.L. National Marine Fisheries Service, Charleston, SC (United States). Southeast Fisheries Science Center

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Description

The assessment of health risks from fish contamination and the issuance of advisories require accurate characterizations of the actual contaminant concentrations in fish of every relevant size. Such characterizations should not only contain statistical measures of location and variation, but provide a complete parameterization of the contaminant distribution for each given size class. This paper proposes two methods for determining such distributions from scatter diagrams of contaminant concentration versus fish length and illustrates them with an analysis of mercury contaminant in king mackerel, Scomberomorus cavalla. The first method consists of fitting contamination data with a family of S-distributions. This family shows trends in its defining parameter values, and these trends provide a comprehensive characterization of the measured contaminant concentrations. Each S-distribution has a rather simple mathematical structure from which one readily obtains secondary characteristics like quantiles, which are necessary for advanced simulation purposes. The second method takes into account that contaminant accumulation is the outcome of a metabolic process. When this process is modeled as a system of differential equations, it can be reformulated in such a way that it describes how the contaminant distribution changes over a given period of time. The resulting distributions have a more complicated structure than those obtained with the first method, but they allow them to bridge the gap between individual metabolic accumulation processes and trends in populations.

Physical Description

8 p.

Notes

OSTI as DE95016660

Source

  • 5. international conference on environmental sciences, Burlington (Canada), 11-15 Aug 1994

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  • Other: DE95016660
  • Report No.: CONF-9408105--1-VUGRAPHS
  • Grant Number: FG01-92EW50625
  • DOI: 10.2172/102157 | External Link
  • Office of Scientific & Technical Information Report Number: 102157
  • Archival Resource Key: ark:/67531/metadc623256

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  • December 31, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Nov. 30, 2015, 3:48 p.m.

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Voit, E.O. & Balthis, W.L. Assessment of size-dependent mercury distribution in King Mackerel, Scomberomorus cavalla, report, December 31, 1994; United States. (digital.library.unt.edu/ark:/67531/metadc623256/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.