Abstract:
:We measured Cd and Pb in the muscle and stomach contents of Thunnus albacares and Katsuwonus pelamis to define the distribution of the elements in the tissues and their degrees of biomagnification. (210)Po was measured in the livers of both species and compared to the results of similar studies. The trophic position of the tuna species was determined by N isotope measurements. The average activity of (210)Po in the liver ranged from 119 to 157 (Bq kg(-1) wet weight) in K. pelamis and T. albacares. The trophic position of T. albacares (4.60) was higher than that of K. pelamis (3.94). The Cd content of the muscle increased significantly with the trophic position of the tuna. δ(13)C in T. albacares and K. pelamis varied, with values of 3.13 and 1.88‰, respectively. The δ(15)N values in yellowfin tuna were higher than in skipjack tuna. The trophic position of T. albacares (4.60 ± 0.67) was therefore more elevated than that of K. pelamis (3.94 ± 1.06). Pb was biomagnified in T. albacares (transfer factor=1.46).
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Ruelas-Inzunza J,Soto-Jiménez MF,Ruiz-Fernández AC,Ramos-Osuna M,Mones-Saucedo J,Páez-Osuna Fdoi
10.1016/j.marpolbul.2014.08.006subject
Has Abstractpub_date
2014-10-15 00:00:00pages
98-103issue
1-2eissn
0025-326Xissn
1879-3363pii
S0025-326X(14)00533-5journal_volume
87pub_type
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