What biological trait of skipjack tuna contributes to naturally lower mercury levels compared to albacore?

Answer

Its shorter life cycle and rapid maturation

The difference in life history strategy between the two species directly impacts mercury accumulation. Skipjack tuna (*Katsuwonus pelamis*) has a much shorter lifespan and achieves sexual maturity much more quickly than albacore. Since the accumulation of environmental contaminants like mercury is a process linked to longevity—the longer a fish lives, the more toxins it integrates into its tissues—the shorter lifespan of the skipjack inherently limits the total amount of mercury it accumulates. This biological feature positions skipjack as the safer option for populations that require frequent consumption, such as young children, minimizing heavy metal exposure risks associated with dietary habits.

What biological trait of skipjack tuna contributes to naturally lower mercury levels compared to albacore?

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