碩士 / 國立臺灣海洋大學 / 環境生物與漁業科學學系 / 106 / The goldlined seabream (Rhabdosargus sarba) is an important economic species on the western coast of Taiwan, and it is also one of the species for release program in recent years. The main purpose of this study is to examine the reproductive biology of goldlined seabream. A total of 802 specimens (443 females and 232 males) caught by otter trawl, longline, pole and lines boots, bottom gill net or gill net between Jan. 2016 and Dec. 2016 were collected in Penghu fishing port. The relation between body weight (BW) and fork length (FL) was BW=0.0280FL^2.9234 (sexes combined)(n = 675, p<0.05). By observing the tissue sections of the oocyte development, can be divided into eight stages: Chromatin-nucleolus stage, Peri-nucleolus stage, Yolk vesicle stage, pre-yolk stage, post-yolk stage, Migratory nucleus stage, Ripe egg stage and Atretic oocytes stage by the histological examination and ovarian development measurements. By the macroscopic appearance of ovarian, histological examination of ovaries, oocyte diameter measurements, GSI, and monthly percentage in each maturity stage, R. sarba is asynchronous and batch spawner type species, which the spawning season is from December to March in the waters of Penghu. The fecundity of this species ranged from 231,493 to 679,372 eggs, with a mean of 427,166 ± 229,229 eggs. Batch fecundity of this species ranged from 105,872 to 297,557 eggs, with a mean of 179,767 ± 103,103 eggs. Both fecundity and batch fecundity increased with the fork length, body weight, and gonad weight. Size at 50% maturity was estimated to be 23.68 cm FL and 20.89 cm FL for females and males, respectively
based on the relation between proportion of maturity and fork length.
| Identifer | oai:union.ndltd.org:TW/106NTOU5451020 |
| Date | January 2018 |
| Creators | Hsu, Tse-Lin, 徐則林 |
| Contributors | Joung, Shoou-Jeng, 莊守正 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 73 |
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