Which characteristic of Albacore Tuna leads to its significantly higher mercury levels compared to Skipjack Tuna?
Answer
It comes from a larger fish
The level of mercury found in different species of tuna is directly correlated with the size and lifespan of the fish. Larger, longer-living predatory fish, such as those yielding Albacore tuna, have more time to accumulate heavy metals like mercury from their diet throughout their lives. Conversely, Skipjack tuna is noted for being smaller and reaching maturity more quickly, which limits the time available for mercury to build up in its tissues, resulting in significantly lower concentrations. This fundamental difference in size and longevity is the primary biological factor determining the necessary restrictions placed on Albacore consumption versus Skipjack consumption during pregnancy.
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