2010-02-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/671665摘要：本計畫將訓練科學觀察員於延繩釣漁船上採集南方黑鮪的耳石。所採集得的耳石將用於年齡查定，以判斷南方黑鮪的年齡。從年齡與體長，體重資料，將可估算得南方黑鮪的成長係數。藉由年齡與體長(體重)的轉換公式，大量的漁業記錄資料，將可用於建立我國所捕獲的南方黑鮪之年齡組成與成長。改進耳石穩定性氧同位素的分析技術將可以增進我等對鮪類洄游環境史與係群結構之了解。<br> Abstract: This project aims to train the scientific observers to collect otoliths of southern bluefin tuna (SBT, Thunnus maccoyii) from Taiwan longline fishery. The age of each SBT whose otolith was collected will be estimated by examining the otolith annuli. These data together with length and weight data will be used to evaluate the growth rate parameters of the SBT caught by Taiwanese longliners. Length and weight data of all SBT caught will be transformed into age data to develop the age composition via the age-length (weight) key. The improvement of otolith δ18O and δ13C analysis will let us better understand the migratory environmental history and population structure of the tuna species.南方黑鮪年齡成長耳石Southern Bluefin TunaAge and growthOtolith