Age and Growth of the Taiwan Abalone, Haliotis diversicolor,in Maoaw Bay of the Northeastern Taiwan
Date Issued
2004
Date
2004
Author(s)
Peng, Hui-Min
DOI
zh-TW
Abstract
Stable oxygen isotope analyses in shell carbonate from the outer shell layer have been used to validate the periodicity of clearly defined growth rings on the outer shell layer and to estimate the age and growth of the Taiwan abalone, Haliotis diversicolor. Living specimens used in this study were collected in Maoaw Bay of the northeastern Taiwan from 1997 to 2003. The criteria of the external visible shell growth bands were built under the relationship between the stable oxygen isotope and temperature. The results indicated that oxygen isotope analyses can be used to avoid the subjectivity of interpreting external lines, and then to estimate each individual's age. Age determination of more than one growth band of all the specimens have been used annual formation of shell growth bands visible and eleven specimens less than one growth band was determined by stable isotope analysis. Then, the age of all the specimens was determined. The von Bertalanffy growth function was fitted using the size-at-age data. The calculated von Bertalanffy growth equations are Lt=111.15(1-e-0.2575(t+0.6749)) . Comparing the studies in Hualian and Taitung area showed the latitudinal gradient. That is the von Bertalanffy growth parameter values increased with latitude and values are inversely. In addition, the settle down time of the larvae was suggested about from August to December.
Subjects
von Bertalanffy成長方程式
穩定氧同位素分析
九孔
年齡決定
輪紋
von Bertalanffy growth function
age determination
Haliotis diversicolor
growth rings
stable isotope analysis
Type
other
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