臺灣博碩士論文加值系統

黃錫鯛（Rhabdosargus sarba）為臺灣西部沿海重要的經濟性魚種，亦是近年來國內主要的魚苗放流對象魚種之一，為探究其生殖生物學特性，本研究於2016年1月至2016年12月間，按月於澎湖地區購買底拖網漁業、延繩釣漁業、一支釣漁業、底刺網漁業或刺網漁業所捕獲之黃錫鯛，共採得802尾黃錫鯛樣本，其中雌魚計443 尾，雄魚計232尾，性別無法判別者68尾，雌雄同體（同時觀察到卵巢、精巢組織）共59尾。黃錫鯛雌雄魚尾叉長（FL）體重（BW）之迴歸關係經檢定，結果顯示雌雄兩者之間沒有顯著差異（p>0.05），因此將雌雄魚之資料合併處理。尾叉長與體重之迴歸關係式為 BW=0.0280FL^2.9234（n = 675，p<0.05）。由組織切片之觀察可將卵細胞發育過程細分為染色質核仁期、周邊核仁期、卵黃胞期、卵黃球前期、卵黃球後期、胚胞移動期、完熟期、及產後期八個階段。利用肉眼觀察卵巢外觀、卵徑測量、組織切片觀察以及生殖腺指數（GSI）月變化別，推估本種為非同步成熟（Asynchronous）型之魚種，生殖期在12 - 3月間。成熟雌魚之孕卵數在231,493 ~ 679,372粒間，平均427,166 ± 229,229粒。本研究依據卵徑大於0.32 mm估得之批次產卵數在105,872 ~ 297,557粒間，平均179,767 ± 103,103粒。孕卵數及產卵數均有隨尾叉長、體重及卵巢重增加而增多的趨勢。利用各體長組距中成熟個體所佔百分比與尾叉長之邏輯曲線關係來推估50%性成熟體長（Lmat），結果雌雄分別為23.68 cm及20.89 cm FL。

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.

第一章、前言 1
一、漁業概況 1
二、形態特徵與生態習性 1
三、研究概況 2
四、研究動機與目的 3
第二章、材料與方法 4
一、樣本來源 4
二、樣本處理 4
三、資料分析 6
第三章、結果 10
一、尾叉長與體重關係 10
二、採卵部位之選擇實驗 10
三、性比 11
四、生殖腺外部形態特徵及組織切片觀察 11
五、生殖腺成熟階段畫分 15
六、生殖期判定 17
七、孕卵數及批次產卵數 18
八、50% 性成熟體長 19
第四章、討論 20
一、樣本之探討 20
二、生殖策略之探討 20
三、產卵形式之判斷 21
四、生殖期之探討 22
五、孕卵數與產卵數的推估 23
六、性成熟體長之探討 23
七、性別、性轉之探討 24
參考文獻 26

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