碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 98 / This study analyzed the relationship between age and growth of swordfish (Xiphias gladius) in the Indian Ocean using anal fin rays. A total 1152 (525 males and 627 females) specimens collected from May 2007 to April 2008 were used for age determination and they were divided into eastern and western Indian Ocean based on 70。E. Among specimens, 630 (281 males and 349 females) were collected from eastern Indian Ocean and 522 (244 males and 278 females) were collected from western Indian Ocean. The lengths of specimens ranged from 60 to 270 cm and from 61 to 252 cm for females and males respectively. The results of likelihood ratio test indicated that there were significant differences in the relationship between weight (RW) and lower jaw fork length (LJFL) for females and males. For the eastern Indian Ocean, the length-weight relationship were RW=1.02×10-5LJFL2.99 and RW=1.39×10-5LJFL2.91, for female and male respectively. For the western Indian Ocean, the length-weight relationship were RW=1.17×10-5LJFL2.97 and RW=1.36×10-5LJFL2.95, for female and male respectively.
The back-calculated lengths-at-age were estimated using Fraser-Lee’s and Monastyrsky methods. The sexually and spatially specific parameters of the standard von Bertalanffy and the generalized von Bertalanffy growth functions were tested using likelihood ratio test. The results of AIC-based model selection indicated that the standard von Bertalanffy growth function fitted to the back-calculated lengths-at-age estimated by Monastyrsky method were most appropriate for swordfish in the Indian Ocean. For the eastern Indian Ocean, the estimates of standard von Bertalanffy parameters were L∞=279.63, k=0.15, t0=-0.37 for female, and L∞=237.34, k=0.23, t0=-0.89 for male. For the western Indian Ocean, the estimates were L∞=265.35, k=0.14, t0=-2.69 for female, and L∞=187.87, k=0.32, t0=-1.27 for male. The results of likelihood ratio test indicated that there were significant differences in growth functions between males and females.
| Identifer | oai:union.ndltd.org:TW/098NTOU5451032 |
| Date | January 2010 |
| Creators | Chi-Hung Lin, 林圻鴻 |
| Contributors | Sheng-Ping Wang, Wei-Chuan Chiang, 王勝平, 江偉全 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 114 |
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