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Journal of Taiwan Fisheries Research
Characteristics of Ovarian Development of the Sergestid Shrimp (Sergia lucens) on the Southwestern Coast of Taiwan
- Date：2005-12-30
- Volume：13
- No：2
- Page：11-23
- Auther：Yi-Hui Chen, Shou-Ren Chen, Cheng-Fang Chang, Jiun
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.