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Butyltins in Dolphin, Shark, and Tuna 23

Table 3. Mean concentrations of butyltin compounds (ng/g wet wt) in immature female blue sharks collected from the Mediterranean Sea
Body wt Length
(kg) (cm) Organ/Tissue n Fat (%) MBT DBT TBT BTs a
6.2 110 Subcutaneous fat 5 0.88 <5 < 1 3.4 3.4
(2-19) b (86-170)
(0.44-I.6) (<5) (<1) (1-9) (1-9)
Liver 5 30 6.6 5.1 19 30
(21M-0) (4-13) (4.3-6) (11-23) (20-36)
Kidney 5 4.3 8.7 26 105 140
(3.1-5.6) (4-15) (13-36) (53-180) (75-220)
aBTs = MBT+DBT+TBT, i.e., total butyltins (BTs) is the sum of mono-(MBT), di-(DBT), and tributyltin (TBT)
bValues in parentheses indicate the range

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