What anatomical structure is used for radiometric dating to estimate the lifespan of Orange Roughy?
Answer
Otoliths (ear bones)
Scientific estimates determining the extraordinary longevity of Orange Roughy—sometimes exceeding 200 or even 250 years—rely on analyzing their otoliths, commonly known as ear bones. Radiometric dating performed on these specific structures provides the data necessary to ascertain such advanced ages. This method underscores just how long-lived this commercial fish species is, which directly correlates with its extremely slow growth rate and delayed reproductive maturity, making it highly vulnerable to overfishing.
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