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本文对高产养鱼池塘中白鲢鱼苗鱼种阶段的生长特性和规律进行了研究。经统计分析表明:1、白鲢鱼苗鱼种阶段的生长过程中,全长和时间的关系均呈直线相关(L=a+bt)。鱼种全长以7-8两月生长最快。日增长率、瞬时增长率以鱼苗阶段居高,鱼种阶段次之。2、白鲢鱼苗阶段体重和时间呈指数相关(W=ae~(bt)),体重生长之速度(dw/dt)和加速度(d~2w/dt~2)与时间成正比。3、鱼种阶段体重与时间呈“S”形曲线相关(W=K/1+ae~(-bt)),体重的生长则以7～9月间最快。生长曲线拐点在t=-1n(1/a)/b;W=k/2。体重生长之速度和加速度分别呈“正态”和“正弦”曲线形。日增重率、瞬时增重率和相对增重率亦以鱼苗阶段较大,鱼种阶段次之。
In this paper, the growth characteristics and regularity of silver carp seedlings in high-yield fish ponds were studied. The statistical analysis showed that: 1, silver carp seedlings during the growth stage, the total length and time were linearly correlated (L = a + bt). The full length of the species grows fastest in 7-8 months. Daily growth rate, the instantaneous growth rate to fish fry stage high, followed by species stage. The weight and time of silver carp fry stage were exponential (W = ae ~ (bt)), the weight growth rate (dw / dt) and acceleration (d ~ 2w / dt ~ 2) were proportional to time. In the stage of fish species, the weight and time were correlated with “S” curve (W = K / 1 + ae ~ (-bt)), while the growth of body weight was the fastest between July and September. The inflection point of growth curve is at t = -1n (1 / a) / b; W = k / 2. Body weight growth and acceleration were “normal” and “sinusoidal” curve. Daily weight gain, instantaneous weight gain and relative weight gain rate are also larger fry stage, followed by species stage.