期刊
FISHERIES SCIENCE
卷 67, 期 5, 页码 784-793出版社
JAPANESE SOC FISHERIES SCIENCE
DOI: 10.1046/j.1444-2906.2001.00324.x
关键词
dolphin fish; fecundity; reproduction; sex ratio; spawning season
类别
The dolphin fish, Corphaena hippurus Linnaeus, is one of the most important migratory fishes on the east coast of Taiwan. Present results are based on an investigation of 1439 specimens caught using long-line and driftnet, and set net collected monthly between September 1996 and September 1997. The sex ratio of female to male and female combined was 65%, demonstrating a female predominance. Oocytes became mature and transparent when they attained 1.0 mm in diameter. The total number of oocytes per ovary was estimated to range from 2.78 x 10(5) to 23.48 x 10(5), but batch fecundity was noticeably lower than the total number of ovarian eggs, ranging 5.3-32.7% (average 30.1%), and the relative fecundity ranging 10-344/g bodyweight (mean 111/g bodyweight). Minimum body size at sexual maturity was estimated to be 51 cm for both sexes. Dolphin fish spawned throughout the year with reproductive activity peaking in February to March. It is suggested that the dolphin fish has an extended spawning season, during which it lays eggs almost continuously.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据