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Human Health Risk Assessment of Mercury in Fish March 20070 f# b+ E# c8 K9 N, P6 ^: H
and Health Benefits of Fish Consumption
- ]: |) z* G9 l3 r6 b' T* tWith respect to the types of mercury found in fish, both inorganic and organic mercury may be0 G* T( t M! B6 ?" ^! k
present. However, methyl mercury is the predominant form of mercury in fish. It’s chemical
8 O: ]8 `. L1 W/ A8 Gproperties allow it to rapidly diffuse and tightly bind to proteins in aquatic biota, including the
: ~" C2 z% j# x8 E& fproteins in the muscle tissue of fish. This leads to bioaccumulation in the fish, with the mercury
" l4 v( I T" p6 e" \level increasing with age of the fish. In turn, bio magnification along the food chain leads to. m1 N* n; P( `5 o0 Z9 E+ A# a
higher mercury levels in piscivorous fish that are higher in the food chain than in fish and other
9 H) V' x: ]7 ]! V5 M; Jorganisms that are low in the food chain. Inorganic mercury can also bio accumulate but to a far
% v$ b/ H3 c$ e/ e6 [lesser extent than methyl mercury.% M" s/ N8 E; S4 {
APPENDIX I
$ q# S; B z8 g! TSummary data for those samples of fish that were found by the Canadian Food Inspection Agency J4 d N! N# L; J
(unless otherwise noted) to contain, on average, approximately 0.2 ppm or less total mercury.
6 j8 z3 m# b$ aSamples were collected at the importers= or at domestic processing plants during the periods April 1,2 D1 J5 a4 n8 a
2002 to March 31, 2003 and April 1, 2003 to October 7, 2004 (unless otherwise noted). A% `7 f! |; Z/ c% d" M) i
concentration of zero indicates that mercury was not detected above the analytical detection limit., F# ^! l1 B7 z2 a: T
Total Mercury Concentration4 w% f/ l( ]7 {1 L5 v0 z
(ppm)
' }- j, `- h+ k/ V8 F& TSpecies6 m! f V; E6 J. b
No. of
0 x" ^# j9 V" A0 esamples$ [ U; l: t2 n9 B- A, a0 M
(N) Mean Median Min Max6 K- r- _* ]; A: B' v! `
Amberjacks 3 0.17 0.14 0.11 0.27: a0 x% T, ~! E6 H- a7 B/ U
Barracouta 1 0.06 0.06 0.06 0.06' G+ p: n: \8 e5 q; W& B
Basa 5 0.02 0.02 0.02 0.02
8 e5 B% V- j" g& V5 p/ eBullhead, Brown 2 0.09 0.09 0.07 0.1
4 i# s* O, I5 i( l; Z2 FCapelin 4 0.02 0.02 0 0.05
: l$ J; X" e8 \- d: e# A( KCarp 1 0.1 0.1 0.1 0.1& [: N1 L; i- b' F, d( f( E* W
Catfish (Channel or unspecified) 16 0.15 0.14 0.02 0.37; m3 e2 U$ G! R& L9 W* a
Char, Arctic 5 0.09 0.10 0.05 0.05" y$ e- ~8 U' ~% R5 b5 x
Clam (various species) 40 0.03 0.01 0 0.08
/ O: }) v5 f( b; [' h, MCockle, Greenland 1 0.05 0.05 0.05 0.05: D* Y+ R H6 N9 n
Cod (Atlantic, Pacific or unspecified) 34 0.06 0.06 0 0.28
9 Y1 u4 f# |/ L# tCrab (Dungeness, Rock, Snow) 19 0.09 0.07 0 0.375 c+ W) _7 m: k2 @
Crawfish 1 0.1 0.1 0.1 0.1
: H9 ]. c% ?' }8 u8 RDrum, Freshwater 2 0.22 0.22 0.03 0.4
6 E0 s& O$ c. vEel (American, Conger/sea, Spiny/spotted) 52 0.19 0.10 0 0.76! b# O& G" F3 y6 L$ A X, P
Eel (species not specified) 107 0.24 0.16 0.01 1.70
/ f* O1 P4 n' \" Q' [$ EFlounder (various species) 22 0.06 0.06 0.03 0.12
$ |& F- a" w iHaddock 3 0.05 0.05 0.03 0.07 |
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发表于 2012-10-27 10:21
