碩士 / 國立高雄海洋科技大學 / 漁業生產與管理研究所 / 96 / This study is aiming to investigate the age and growth of Indian albacore tuna, based on length frequency analyses and otoliths reading methods.
The historic length data and catch statistics of the Indian albacore were kindly made available by the Overseas Fisheries Development Council (OFDC). Owing to the apparent peaks in the length frequency distributions for the year of 1980-1983, the length data of this time period were adopted to estimate the age and growth of Indian albacore. These data were debugged, summed up and expanded to the total albacore catch in numbers. The MULTIFAN program was applied to estimate the von Bertalanffy’s growth equation, and the k and L∞ were then obtained as 0.157yr-1 and 144 cm, respectively. In addition, 54 otolith samples of albacore were provided by the observers worked on board. The otoliths were then examined under microscope after preliminary treatments, such as cleaning, embedding, and grinding. Some of these otoliths were difficult to be identified their rings, and only 34 of them were carried on the ring-count procedures. Each of these otoliths was examined two times independently, and the APE was calculated as 4.58%. For those ring-count were different between two readings, their otoliths were examined for the third time. However, ring-count of 30 otoliths were finally confirmed. Based on the length of the fish and their ring-count on otoliths, the mean lengths of albacore at age of 4-13 were obtained, respectively. These estimated lengths at age were found to be smaller than the von Bertalanffy’s growth equation derived from the length frequency analyses.
| Identifer | oai:union.ndltd.org:TW/095NKIM8451009 |
| Date | January 2008 |
| Creators | Shih, Chia Lung, 石佳隴 |
| Contributors | 陳志遠博士,邱萬敦博 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 77 |
Page generated in 0.0018 seconds