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題 名 | Reproductive Biology of the Redtail Prawn, Penaeus penicillatus, in the Southwestern Waters of Taiwan=臺灣西南海域長毛對蝦(Penaeus penicillatus)之生殖生物學研究 |
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作 者 | 吳伊淑; 藍揚麒; 黃建智; 陳郁凱; 翁進興; | 書刊名 | 水產研究 |
卷 期 | 31:2 2023.12[民112.12] |
頁 次 | 頁15-24 |
分類號 | 438.662 |
關鍵詞 | 長毛對蝦; 性成熟體長; 生殖腺指數; 生殖季節; Penaeus penicillatus; Length at maturity; Gonadosomatic index; Spawning season; |
語 文 | 英文(English) |
中文摘要 | 長毛對蝦 (Penaeus penicillatus) 為臺灣西南海域單船拖網及蝦桁拖網漁業重要經濟物種之一,然相 關基礎調查資料仍闕如,本研究目的即為建立其生殖生物學參數,俾利未來進行管理之用。調查期間由 2020 年 12 月起至 2021 年 12 月止,按月至嘉義東石漁港採樣,共採集雌蝦 634 尾,雄蝦 956 尾,共計 1,590 尾樣本,總性比為 0.4,雌雄比例存在顯著差異。雌蝦體長介於 84.5–253.3 mm,雄蝦則為 78.3– 181.7 mm;雌蝦體重介於 6.04–253.85 g,雄蝦則為 7.21–140.16 g,體長與體重之關係式為 BW = 8.0 × 10⁻⁵ TL2.61 (R² = 0.93,n=1,590);根據卵巢生殖腺外觀及生殖腺指數月別變動,同時參考卵巢組織切片等 數據,推估長毛對蝦有兩個生殖期,一為 2–5 月,其次為 8–11 月,高峰在 2–5 月。雌蝦最小性成熟體 長為 87.3 mm,50% 性成熟體長為 169.3 mm。 |
英文摘要 | The redtail prawn, Penaeus penicillatus, is commercially important for bottom trawling and shrimp beam trawling in the southwestern waters of Taiwan. However, no histological study of this species based on wild samples has been conducted. In this work, the reproductive biology of P. penicillatus was studied based on monthly samples collected in the southwestern waters of Taiwan from December 2020 to December 2021. The total length (TL) ranged from 84.5 to 253.3 mm for 634 females, while body weight (BW) varied from 7.2 to 140.2 g. For 956 males, minimum and maximum sizes were 78.3 and 181.7 mm TL, respectively, while BW ranged from 6.0 to 53.9 g. The relationship between TL and BW was BW = 8.0 × 10⁻⁵ TL2.61 (R² = 0.93, n = 1,590), and there were no statistically significant differences between females and males. The overall sex ratio was 0.40 (X² = 65.21, p < 0.001), but females were significantly more common among individuals larger than 165 mm TL. In addition, monthly sex ratios fluctuated from 0.19 to 0.51 without a systematic pattern. Reproductive activity, assessed using histology and the gonadosomatic index (GSI), indicated that mature females could be found during February to May and August to November, with peak spawning occurring from February to May. For females, the minimum size at maturity and estimated length at 50% maturity were 87.3 mm TL and 169.3 mm TL, respectively. |
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