2014
DOI: 10.2331/suisan.80.917
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Age determination and validation using internal growth rings in shell cross-sections of Ezo abalone <i>Haliotis discus hannai</i>, Iwate Prefecture, Japan

Abstract: We developed an age determination method for Ezo abalone Haliotis discus hannai using the internal growth rings in the cross-section of the inner lip shell. A laboratory experiment showed that 1-year-old juveniles had one internal growth ring that was deposited during the season of lowest seawater temperature. Tagged juveniles (2 years old) were released into their natural habitat and recaptured after 2 5 years from the date of release. The recaptured individuals (n=3) had the same number of internal growth r… Show more

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