碩士 / 國立臺灣海洋大學 / 海洋資源管理研究所 / 92 / Abstract
Fishes have various body shapes. The objective of this study was to examine whether the performances of growth equations were affected by different body shapes. This was differ from other studies fitting a single species with different growth equations.
The four most commonly used growth equations in fisheries-von Bertalanffy, Logistic, Gompertz, and Richards were fitted to the growth data of 12 samples with different body shapes. The mean square error (MSE), the Akaike’s Information Criterion (AIC) , and the deviation of the estimated asymptotic length and the maximum observed length obtained from the species were used as the criteria for determining the most suitable equations.
The results indicated that von Bertalanffy growth equation has the best fittings to fishes with all body shapes except that with elongated shape. Furthermore, the partial F-test was used to evaluate the improvement by addition a fourth parameter in these three-parameter models. The 4-parameter Richards growth equation had significantly better fitting than the other 3-parameter growth equations for elongated fishes but yield worse fitting for other body shapes. Finally, the recommendation of choosing the best growth equation for fishes with different body shapes was proposed.
Key words: Fitting, growth equation, body shape
| Identifer | oai:union.ndltd.org:TW/092NTOU5277002 |
| Date | January 2004 |
| Creators | Ping Chen, 陳屏 |
| Contributors | Kwang-Ming Liu, I-Hsun Ni, 劉光明, 倪怡訓 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 66 |
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