TY - JOUR
T1 - Bioaccumulation of mercury in muscle tissue of yellowfin tuna, Thunnus albacares, of the eastern Pacific Ocean
AU - Ordiano-Flores, Alfredo
AU - Galván-Magaña, Felipe
AU - Rosiles-Martínez, Rene
PY - 2011/12
Y1 - 2011/12
N2 - Tuna, like most large pelagic fish, are highly exploited by man, and it is, therefore, important to determine mercury (Hg) levels in these species in order to establish allowable limits for their consumption and/or contamination levels in the environment. In this study, we evaluated Hg accumulation in yellowfin tuna (Thunnus albacares) muscle in two different geographic sites of the eastern Pacific Ocean. There was a positive association between Hg content and tuna size in the equatorial zone (EQZ). Using adjusted sizes, the site of origin was a determinant factor in Hg accumulation. Sex, by contrast, did not affect Hg levels, suggesting that males and females have similar feeding habits. No Hg concentration was over the Hg content thresholds for large marine predators adopted by Mexican norms and by North American authorities (1 μg g -1 w.w.). Hg input due to yellowfin tuna consumption represented from 9.84% to 35.87% in Baja California Sur and from 14.78% to 53.87% in EQZ of the provisional tolerable weekly intake adopted by the World Health Organization. The target hazard quotient for Hg was <1 in each group of the population studied, which indicates that consumption of yellowfin tuna is not a threat to human health.
AB - Tuna, like most large pelagic fish, are highly exploited by man, and it is, therefore, important to determine mercury (Hg) levels in these species in order to establish allowable limits for their consumption and/or contamination levels in the environment. In this study, we evaluated Hg accumulation in yellowfin tuna (Thunnus albacares) muscle in two different geographic sites of the eastern Pacific Ocean. There was a positive association between Hg content and tuna size in the equatorial zone (EQZ). Using adjusted sizes, the site of origin was a determinant factor in Hg accumulation. Sex, by contrast, did not affect Hg levels, suggesting that males and females have similar feeding habits. No Hg concentration was over the Hg content thresholds for large marine predators adopted by Mexican norms and by North American authorities (1 μg g -1 w.w.). Hg input due to yellowfin tuna consumption represented from 9.84% to 35.87% in Baja California Sur and from 14.78% to 53.87% in EQZ of the provisional tolerable weekly intake adopted by the World Health Organization. The target hazard quotient for Hg was <1 in each group of the population studied, which indicates that consumption of yellowfin tuna is not a threat to human health.
KW - Bioaccumulation
KW - Eastern Pacific Ocean
KW - Health threat
KW - Mercury
KW - Thunnus albacares
UR - http://www.scopus.com/inward/record.url?scp=84155165488&partnerID=8YFLogxK
U2 - 10.1007/s12011-011-9136-4
DO - 10.1007/s12011-011-9136-4
M3 - Artículo
SN - 0163-4984
VL - 144
SP - 606
EP - 620
JO - Biological Trace Element Research
JF - Biological Trace Element Research
IS - 1-3
ER -