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Re: [SANET-MG] Mercury in Fish Meal
Hi Alan Ismond,
It is fiendishly difficult to find data on mercury in fish meal. There
is one report "Johnston, J.N. & Savage, G.P., 1991, Mercury consumption
and toxicity with reference to fish and fishmeal, Nutrition Abstracts
and Reviews (Series A), 61,
74-116. There are tables of mercury contents of fish meal. Most of the
mercury in the raw material is retained in the meal. High mercury
contents are found in meals from high trophic level carnivores such as
dogfish, and in fish from polluted waters, such as fish from the North
American great lakes. The median total mercury concentration in a table
of 32 fish meals, , is 0.22 mg mercury/kg. Methylmercury is about 85%
of this". In Canada fish with 0.50 mg/kg mercury are exempt from
warning on mercury consumption by people.
The chicken waste is then fed to cattle. FAO has a book on commercial
Coprophagia with many "tasty" recipes for chicken and feed lot poop. One
FAO report:http://www.fao.org/docrep/004/x6518e/X6518E04.htm
indicated that cattle fed waste litter from broiler hens had a threefold
increase in mercury in their internal organs.
It is always a shock to see how extensive poop feeding is in commercial
meat production. FAO does however, provide advice on techniques such as
fermentation of the animal waste to make it safer.; However, it is clear
that chicken poop feeding to sheep and cattle has a drawback in the
bio-magnification of mercury and arsenic in the food chain.
Hope this helps, sincerely, joe cummins
Aquatfs@AOL.COM wrote:
In a message dated 10/29/2005 20:00:21 Pacific Standard Time,
LISTSERV@LISTS.IFAS.UFL.EDU writes:
"Maybe from "fish meal" in the chicken feed? "
Yes. According to the Alternative Medicine Review, mercury in
poultry comes
from fish meal in the diet:
Wouldn't the presence and level or absence of mercury in fish meal
depend on the species of fish rendered? Is the assumption that all
fish meal contains mercury? Is there data to support this claim?
Alan Ismond, P.Eng.
Aqua-Terra Consultants
 
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