The bioaccumulation of arsenic (As) in the muscle, liver, kidneys, and brain of the shark Sphyrna lewini was measured in 40 juvenile specimens from southeast Gulf of California. Additionally, the biomagnification factor was calculated through prey items from stomach contents of the analyzed specimens. The concentrations of As (mg kg⁻¹, wet weight) were higher in the muscle (10.1 ± 0.3) and liver (9.4 ± 0.5) than in the brain (4.5 ± 0.3) and kidneys (4.2 ± 0.2), which may be attributed to the biological functions of each tissue. Positive correlations were found between the levels of As in muscle and liver with the biological parameters of S. lewini. Hammerhead sharks feed mainly of teleost fishes with low As values (Clupeidae fishes, 1.1 ± 0.5; Sciaenidae fishes, 1.0 ± 0.6; Scomber japonicus, 1.2 ± 0.6; and Etropus crossotus 2.1 ± 0.4) compared with the predator, indicating biomagnification. Inorganic arsenic (As_i) in muscle was estimated as 3% of the total As, although muscle consumption is unlikely to represent a risk (HQ < 1) in humans. Moreover, the probabilities of developing cancer were estimated as low (3.99 × 10^–5 to 3.32 × 10^–6). To avoid health risks related to As, a weekly ration must not exceed 69.3 and 484.8 g in children and adults, respectively.

在来自加利福尼亚州东南部海湾的40个少年标本中，测量了鲨鱼Sphyrna lewini的肌肉，肝脏，肾脏和大脑中砷（As）的生物累积。另外，通过从被分析样品的胃内容物中的猎物计算出生物放大因子。肌肉（10.1±0.3）和肝脏（9.4±0.5）中的As（mg kg ^-1，湿重）的浓度高于大脑（4.5±0.3）和肾脏（4.2±0.2）的As（mg kg ^-1，湿重）。归因于每个组织的生物学功能。肌肉和肝脏中As水平与S. lewini的生物学参数之间呈正相关。锤头鲨主要捕食As值低的硬骨鱼（C科鱼类，1.1±0.5; cia科鱼类，1.0±0.6; com鱼，1.2±0.6;刺肠E（Etropus crossotus） 2.1±0.4），表明其具有生物放大作用。肌肉中的无机砷（As _i）估计占总砷的3％，尽管肌肉消耗不太可能对人类构成风险（HQ <1）。此外，患癌症的可能性估计较低（3.99×10 ^–5至3.32×10 ^–6）。为避免与砷有关的健康风险，儿童和成人的每周定量分别不得超过69.3 g和484.8 g。