There are two zones in otoliths indicating growth – a dark translucent zone representing a period of fast growth and a white opaque zone called annuli representing a period of slower growth. mark-recapture of chemically-tagged fish) are necessary to validate that one whole annulus is indeed equal to one year of growth.
Annuli formation is likened to tree ring growth, both are used for age estimations. Combining this data with comparisons on the size of the fish sheds light on how fast the species grows.
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For samples that do require lab pretreatment, results are reported in 14 business days.
Please contact the lab for sample sizes and prices. You only need to include the confirmation code in the package.
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Despite the many techniques that can be used for age validation, only radiocarbon dating can provide the absolute age in a variety of fishes particularly the long-lived ones.
applied to samples directly affect the final result.
You can contact the lab to discuss the pretreatment or request to be contacted once the pretreatment has been completed before the samples are analyzed in the accelerator mass spectrometer.
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