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水產研究(1993年創刊)

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  • 點閱: 842
  • 日期: 2019-07-16
水產研究(1993年創刊)-臺灣西南海域杜氏叫姑魚之生殖生物學研究
主題: 臺灣西南海域杜氏叫姑魚之生殖生物學研究
摘要(中):
杜氏叫姑魚 (Johnius dussumieri) 為臺灣西南海域拖網漁業主要漁獲經濟魚種之一,本研究2014年2月至2015年2月間,按月至高雄梓官蚵仔寮及屏東東港魚市場採集由底拖網捕獲之杜氏叫姑魚,共採集676尾樣本,其中雌魚292尾、雄魚384尾,全長範圍為137.2–290.4 mm,體重範圍為37.5–320.5 g。雌魚全長 (TL) 與體重 (BW) 之迴歸關係式為BW = 7.0 × 10-6TL3.120 (R² = 0.947, n = 292, p < 0.05)。根據肉眼觀察生殖腺外觀、組織切片、生殖腺指數等,得知本魚種生殖期為2–8月,生殖高峰為5–8月,平均孕卵數為111,804 ± 61,471粒卵,單次平均產卵數為30,259 ± 22,015粒卵,雌魚比例 (雌魚數∕全部樣本數) 為0.43,性比會隨著全長增加而提高。雌魚50% 性成熟體長為221.8 mm,成熟百分比與全長關係式為 Pr = 1/(1+e5.42-0.0244TL)。
出版日期: 2018/6/30
標題title(英): Reproductive Biology of Sin Croaker (Johnius dussumieri) in the Waters off Southwestern Taiwan
作者: 何珈欣‧吳伊淑‧蕭琍婷‧陳羿惠‧余淑楓‧吳龍靜
卷別: 26
期別: 1
頁碼: 13-26
作者 auther(英): Jia-Shin He, Yi-Shu Wu, Li-Ting Hsiao, Yi-Hui Chen, Shwu-Feng Yu and Long-Jing Wu
摘要abstract(英): The sin croaker (Johnius dussumieri) is one of the important commercial species for trawl fisheries in southwestern Taiwan. Monthly samples of specimens taken from the trawl landings at the Ziguan and Tungkang fishing ports from February 2014 to February 2015 added up to a total of 676 specimens (292 females and 384 males). The total length (TL) and body weight (BW) of the collected fish ranged from 137.2 to 290.4 mm and from 37.5 to 320.5 g, respectively. For females, the relationship between TL and BW was estimated as BW = 7.0×10-6TL3.120 (R² = 0.947, n = 292). Based on the macroscopic appearance, histological examination of ovaries, and gonadosomatic index for these specimens, the spawning season for the sin croaker in the coastal waters off southwestern Taiwan likely lasts from February to August and peaks from May to August. The mean fecundity and mean batch fecundity of this species were estimated as 111804±61471 and 30259±22015, respectively. The sex ratio (female/total) was 0.43. The size (in TL) at 50% maturity (L50) was estimated to be 221.8 mm. Logistic curves describing the relationship between the proportion of maturity at each length interval and TL were estimated as Pr = 1/(1+e5.42-0.0244TL).
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