農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

白帶魚廣泛分布於臺灣沿海，為重要的經濟性魚種之一。本研究主要針對臺灣北部 海域白帶魚進行體長組成及生殖研究。採樣期間自2017年9月至2018年11月，總計蒐 集日本帶魚共1556尾並測量樣本之肛前長(PAL)、體重(BW)及生殖腺重(GW)。樣本肛 前長(PAL)介於88 - 511 mm，體重(BW)介於0.04 – 1231.28 g；其中雌魚1082尾 (PAL = 234.41 ± 49.94 mm；BW = 191.21 ± 149.36 g)，雄魚421尾 (PAL = 218.16 ± 31.01 mm；BW = 140.47 ± 77.92 g) ，性別不明共53尾。總性比為65.6 %(雌魚數/總樣本數)。雌、雄魚體長 (FL) 與體重 (BW) 之迴歸關係經共變異分析 (ANCOVA) 檢定結果顯示有顯著差異 ( P< 0.05) ，關係式分開表示雌性為：BW = 2.481 × 10 -5 PAL2.884(r 2 = 0.911，n = 1503)、雄性為：BW = 5.360 × 10 -6 PAL3.157 (r 2 = 0.882，n = 419)。根據組織切片、生殖腺指數(GSI)等方法推測本種生殖期在 2月有一個GSI高峰值，1-4月為主要生殖期。

The cutlassfish ( Trichirus spp. ) is commercial fishery targeted species which lives in the surrounding waters of Taiwan. This study focuses on Pre-Anal length (PAL) frequency and reproduction of cutlassfish which caught off northern Taiwan waters. From Sep. 2017 to Nov. 2018, totally 1556 cutlassfish were caught per month sampling, and the Pre-Anal length (PAL, 88 – 551 mm), body weight (BW, 8.46 – 1231.0 g) and gonad weight (GW) were measured. The sex ratio (female/total) was 65.6 % belong to 1082 female (234.41 ± 49.94 mm PAL; 191.21 ± 149.36 g BW) and 421 male (218.16 ± 31.01 mm PAL; 140.47 ± 77.92 g BW). The ANCOVA test showed that there was significant difference in the relationship between PAL and BW for both sexes (p<0.05). The relationship formula of female was BW = 2.481 × 10 -5 FL 2.884(r 2 = 0.991，n = 1503), male was BW = 5.360 × 10 -6 FL 3.157 (r 2 = 0.882，n = 419). From the results of histological examination of ovaries, estimation of gonadosomatic index (GSI) that shows the indices was high in February.