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

本研究探討臺灣產正櫻蝦的卵巢成熟特性，包括卵巢特徵、卵細胞的發育、成熟階段之生殖腺指數、成熟卵巢之季節變化及產卵期等。從1999年 9月起至2000年10月止，共採集8,191尾之雌蝦，其中有效樣品2,820尾作為卵巢組織切片觀察用。依據卵巢外觀及GSI，正櫻蝦的卵巢發育可分為未成熟、發育中、部分成熟及完全成熟等4期。其卵母細胞的發育則分為10期，即卵原細胞與染色質核仁期、周邊核仁前期、周邊核仁後期、脂肪球期、卵黃顆粒期、卵黃球前期、卵黃球後期、胚胞移動期、前成熟期、成熟期。當GSI小於0.53，無成熟卵；GSI在0.60～2.00時，成熟卵佔4.47%；2.01～3.00時，成熟卵佔24.41%；大於3.01時，成熟卵佔39.88%。由於全年均可發現孕卵雌蝦，本研究推測正櫻蝦係週年性產卵，另由GSI分析顯示，在12月、4月及7月為正櫻蝦的產卵高峰期。

In this study, we investigated the ovarian development of a sergestid shrimp (Sergia lucens) in the coastal waters of southwestern Taiwan by histological methods. Data were collected including ovarian characteristics, state of oogenesis, and the gonadosomatic index (GSI). In total, 8191 individuals were collected between September 1999 and October 2000. The seasonal change of maturity was observed in 2820 specimens using histological analyses.Four phases of ovarian development were determined using the GSI. Oogenesis was divided into ten stages, which ranged from immature to ripe. No mature eggs were found when the GSI was < 0.53. When the GSI was 0.60~2.00, 2.01~3.00, and > 3.01, 4.47%, 24.41%, and 39.88% mature eggs were found, respectively.All female shrimp possessed ovaries with maturing or mature eggs throughout the year. Seasonal changes in the GSI showed three peaks in April, July, and December. Consequently, the study concluded that Sergia lucens in this area spawns year-round, but mainly from April to July.