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頁籤選單縮合
| 題 名 | 澎湖海域之遠海梭子蟹(Portunus pelagicus)繁殖特性研究=Reproductive Characteristics of the Blue Swimmer Crab, Portunus pelagicus, in the Waters off Penghu |
|---|---|
| 作 者 | 陳彥愷; 劉祐瑜; 陳東本; 曹鈺萌; 鄭維毅; 謝恆毅; | 書刊名 | 水產研究 |
| 卷 期 | 33:2 2025.12[民114.12] |
| 頁 次 | 頁39-57 |
| 分類號 | 438.662 |
| 關鍵詞 | 遠海梭子蟹; 生殖生物學; 生殖腺指數; 澎湖海域; Portunus pelagicus; Reproductive biology; Gonadosomatic index; GSI; Penghu waters; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究旨在分析澎湖沿岸水域遠海梭子蟹 (Portunus pelagicus) 之生殖生物學參數。於 2023 年 3 月至 2024 年 2 月間,透過潛水採集共 372 隻樣本,性比為 0.51 (雌蟹數 / 總樣本數),經統計 檢定無顯著差異 (p > 0.05)。雌蟹甲殼寬 (carapace width, CW) 範圍為 110 – 191 mm,體重 (body weight, BW) 範圍為 80.5 – 463 g;雄蟹 CW 為 111 – 188 mm,BW 為 83.3 – 480 g。雌蟹 CW-BW 迴 歸關係式為 BW=1.01×10-4CW2.9097;雄蟹為 BW=1.72×10-4CW2.8297,兩者具顯著差異 (p < 0.05)。根 據生殖腺指數 (gonadosomatic index, GSI) 與成熟度觀察,推測其生殖季為 12 月至隔年 7 月,生殖 高峰為 3 月和 4 月。另,按月潛水調查發現,終年皆可發現抱卵雌蟹,故推斷本海域之遠海梭子蟹 全年均有繁殖現象。單次抱卵數 (fecundity, F) 為 31.5 萬至 130 萬粒卵,平均單次抱卵數為 79.2 萬 粒卵。比較三種體型 (200 g 以下、200–300 g、300 g 以上) 抱卵雌蟹所孵出之初期幼體存活率, 以 200 g 以上個體者表現為佳。 |
| 英文摘要 | The blue swimmer crab, Portunus pelagicus, is one of the most significant fishery resources in Taiwan. A total of 372 specimens (188 females and 184 males) were collected from the coastal waters of Penghu between March 2023 and February 2024. Chi-square tests indicated a sex ratio of 0.51, which does not significantly deviate from the expected 0.5 (p > 0.05). The carapace width (CW) and body weight (BW) of female samples ranged from 110 to 191 mm and 80.5 to 463 g, respectively; for males, the ranges were 111 to 188 mm in CW and 83.3 to 480 g in BW. The relationship between CW and BW for both sexes was determined using the following regression equations: BW=1.01 × 10-4CW2.9097(females); BW=1.72 × 10-4CW2.8297(males). Maximum likelihood ratio tests revealed significant differences between these equations (p < 0.05), justifying the use of sex-specific regression models. Monthly trends in the gonadosomatic index (GSI) and the proportion of ripe-stage gonads suggest that the spawning season extends from December to July, with peaks occurring in March and April. Monthly diving surveys confirmed the presence of ovigerous females year-round. Consequently, P. pelagicus in Penghu waters reproduces throughout the year, peaking in spring. Batch fecundity ranged from 315,420 to 1,302,070 eggs, with a mean value of 792,076. Furthermore, a comparison of early larval survival rates among three maternal size classes (< 200 g, 200–300 g, and > 300 g) showed significantly higher survival rates in crabs exceeding 200 g. |
本系統中英文摘要資訊取自各篇刊載內容。