碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 107 / Yellow seabream (Acanthopagrus latus) distributed globally, and it lived in the shallow sea. In Taiwan, it is an important species in both aquaculture and coastal fisheries, with high economic value. However, research about age and growth of yellow seabream wild population has not been established completed so far. And in the case of yellow seabream resources increasingly recession, it is necessary to establish the growth model to comtribute for the following resource assessment and other related management measures, and combine fry releasing programe and other fisheries policies to enhancing the fishery resources of yellow seabream. The purpose of this study is to estimating growth parameters for yellow seabream by otolith reading and the otolith morphological characteristics (including the length, width and weight of the otolith). Random forest analysis method was used to determine whether the otolith morphological characteristics is a feasible ageing tool. There were 643 specimens collected in this study between September 2016 and March 2018. The specimen from Miaoli accounted for more than 80% of the total specimen. Therefore, only the yellow seabream specimen in Miaoli area will be further analyzed in this study. According to the marginal increment ratio analyses, the formation periodicity of opaque zone was determined to be annual, and a new opaque zone will be formed from June to July. The growth parameters estimated by using VBGE, Robertson and Gompertz were 35.68, 41.19, and 38.85 cm for L∞, 0.43, 0.31, and 0.34 yr-1 for k respectively, and the AIC value was lowest by VBGE. The female and male VBGE growth function for yellow seabream were Lt = 36.35 (1- e -0.425( t+1.56 ) ) for female, and Lt = 33.52 (1 - e -0.431( t+1.90 ) ) for male, and was significant different between sex. According to Random forest analysis, the otolith weight has the most explained rate, and the average correction ratio was 60.08%. Therefore, after collecting more specimens, this method should be able to replace otolith section ageing method to increase efficiency.
| Identifer | oai:union.ndltd.org:TW/107NTOU5451018 |
| Date | January 2019 |
| Creators | Chiu, Shao-Jhu, 邱劭竹 |
| Contributors | Wang, Chia-Hui, 王佳惠 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 60 |
Page generated in 0.0015 seconds