黄渤海鹰爪虾Trochypenaeus curvirostris(Stimpson)种群结构特征的初步研究

本文探讨了鹰爪虾黄渤海群系的种群结构特征。结果如下:1.种群体长范围、生殖群体为20—107mm;越冬群体为13—101mm。2.种群的年龄结构为3个年龄组,4个世代(0—3龄)。3.头胸甲长和体重关系W=0.002421L~(2.5173),r=+0.9961。4.雌、雄性比组成为1.35:1;性成熟的年龄一般为2龄虾。

PRELIMINARY STUDY ON POPULATION STRUCTURE OF TRACHYPENAEUS CURVIROSTRIS(STIMPSON) IN HUANGHAI AND BOHAI SEAS

6778specimens were collected from the catches of Trachypenaeus curvirostris (Stimpson) in the Bohai and the mid and northein Huanghai Seas from February to December, 1984-1985. The major characteristics of population structure of the shrimp were described as follows:1. Body length composition ranges from 20-107mm in reproductive population and 13-101mm for wintering population. 2. Three phases up for the body length composition, which indicated groups by age and contained four may be summed cohorts (0 -3 years old). 3. The relationship between the carapace length (L) and body weight(W)was:W = 0.002421L2.5173 4. The Sex ratio = 1.35:1. The 2-year-old shrimp were Sexuality matured already. The lengths of minimum mating and Spawning types were 50mm and 55mm, respectively, for female shrimp.