2019-01-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/677912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(Thunnus maccoyii)的耳石，並且從高雄冷凍廠取得南方黑鮪耳石 。所採集得的耳石將用於年齡查定，以判斷南方黑鮪的年齡。從年齡與體長資料，將可估算得南方黑鮪的成長係數。藉由年齡與體長的轉換公式，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。<br> Abstract: This project aims to train the scientific observers to collect otoliths of southern bluefin tuna (SBT, Thunnus maccoyii) from Taiwan longline fishery. We will also collect SBT otoliths from the tuna process plants in Kaohsiung. The age of each SBT sampled for otoliths will be estimated by examining the otolith annuli. These data together with length data will be used to evaluate the growth rate parameters of the SBT caught by Taiwanese longliners. Length data of all SBT caught will be transformed into age data to understand the age composition via the age-length key, which will be used to estimate the age composition of the total SBT catches.南方黑鮪耳石年齡組成southern bluefin tunaotolithage composition