NDLI: Assessment of Nonlethal Methods for Predicting Muscle Tissue Mercury Concentrations in Coastal Marine Fishes

Content Provider	Springer Nature Link
Author	Pirai, Maria N. Taylor, David L.
Copyright Year	2013
Abstract	Caudal fin clips and dorsolateral scales were analyzed as a potential nonlethal approach for predicting muscle tissue mercury (Hg) concentrations in marine fish. Target fish were collected from the Narragansett Bay (Rhode Island, USA) and included black sea bass Centropristis striata [n = 54, 14–55 cm total length (TL)], bluefish Pomatomus saltatrix (n = 113, 31–73 cm TL), striped bass Morone saxatilis (n = 40, 34–102 cm TL), summer flounder Paralichthys dentatus (n = 64, 18–55 cm TL), and tautog Tautoga onitis (n = 102, 27–61 cm TL). For all fish species, Hg concentrations were greatest in muscle tissue [mean muscle Hg = 0.47–1.18 mg/kg dry weight (dw)] followed by fin clips (0.03–0.09 mg/kg dw) and scales (0.01–0.07 mg/kg dw). The coefficient of determination (R 2) derived from power regressions of intraspecies muscle Hg against fin and scale Hg ranged between 0.35 and 0.78 (mean R 2 = 0.57) and 0.14–0.37 (mean R 2 = 0.30), respectively. The inclusion of fish body size interaction effects in the regression models improved the predictive ability of fins (R 2 = 0.63–0.80; mean = 0.71) and scales (R 2 = 0.33–0.71; mean = 0.53). According to the high level of uncertainty within the regression models (R 2 values) and confidence interval widths, scale analysis was deemed an ineffective tool for estimating muscle tissue Hg concentrations in the target species. In contrast, the examination of fin clips as predictors of muscle Hg had value as a cursory screening tool; however, this method should not be the foundation for developing human consumption advisories. It is also noteworthy that the efficacy of these nonlethal techniques was highly variable across fishes and likely depends on species-specific life-history characteristics.
Starting Page	715
Ending Page	723
Page Count	9
File Format	PDF
ISSN	00904341
Journal	Archives of Environmental Contamination and Toxicology
Volume Number	65
Issue Number	4
e-ISSN	14320703
Language	English
Publisher	Springer US
Publisher Date	2013-08-09
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecotoxicology Pollution Environmental Health Environmental Chemistry Soil Science & Conservation Environmental Monitoring/Analysis
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Medicine Toxicology

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