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水產研究(1993年創刊)

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  • 日期: 2019-05-24
水產研究(1993年創刊)-臺灣東南部海域鱗網帶鰆之生殖生物學研究
主題: 臺灣東南部海域鱗網帶鰆之生殖生物學研究
摘要(中):
本研究於2009年3月至2011年3月間,按月至臺東縣新港魚市場採集鱗網帶鰆 (Lepidocybium flavobrunneum) 樣本進行生殖生物學研究。總計採得299尾雌魚之生殖腺樣本,樣本體長 (FL) 介於40 ~ 155 cm,體重 (Rw) 介於0.8 ~ 45 kg。樣本之生殖腺成熟指數 (GSI) 介於0.028 ~ 12.95,顯示在2 ~ 3月有一個成熟高峰存在,經由組織學觀察所得卵巢成熟之個體所佔百分比月別變化,亦發現性成熟比例最高的季節為2 ~ 3月。根據卵母細胞卵徑分布型態判斷鱗網帶鰆產卵型式為非同步成熟型 (asynchronous)。50% 性成熟體長 (L50) 為106.5 cm,95% 性成熟體長 (L95) 為129.5 cm。觀察所有樣本卵母細胞發育階段發現,87% 處於未成熟期 (immature stage),7% 處於成熟期 (maturing stage),6% 處於休止期 (resting stage),未發現有產卵中或剛產完卵階段之樣本,亦無發現含水卵個體存在。估算總孕卵數 (total fecundity) 及平均相對孕卵數 (relative fecundity) 分別為46 ± 31 (S.D.) 百萬粒卵及每公克魚體重含有2,604 ± 700 (S.D.) 粒卵細胞。
出版日期: 2014/12/25
標題title(英): Reproductive Biology of the Escolar (Lepidocybium flavobrunneum) in the Southeastern Waters off Taiwan
作者: 許紅虹‧王勝平‧江偉全‧陳文義
卷別: 22
期別: 2
頁碼: 13-24
作者 auther(英): Hung-Hung Hsu, Sheng-Ping Wang, Wei-Chuan Chiang and Wen-Yie Chen
摘要abstract(英): The reproductive biology of the escolar (Lepidocybium flavobrunneum) was examined through monthly samples collected from the Shinkang fish market of Taitung county from March 2009 to March 2011. A total of 299 length-weight measurements were collected (fork lengths ranged from 40-155 cm and round weights ranged from 0.8-4.5 kg), and gonads were sampled. The gonadosomatic index (GSI) ranged from 0.028-12.95, with monthly changes in the GSI indicating that the mature stage peaked from February to March. Observations of the histology of the monthly variation in gonads also indicated that the greatest proportion of mature females occurred from February to March. Based on the variation in the diameters of the oocytes, the spawning pattern of the escolar is considered asynchronous. The estimated 50% length-at-maturity (L50) was 106.5 cm and the 95% length-at-maturity (L95) was 129.5 cm. In the total sample, 87% of the oocytes were immature, 7% were mature, and 6% were spent or at the rest stage. As concluded from the absence of hydrated oocytes in the samples, no spawning or recently spawned specimens were observed. The estimated total fecundity was 46±31 (S.D.) million eggs, and the relative fecundity was 2,604 ± 700 (S.D.) eggs/g.
使用語言: 中文
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