CAPTURED STANDARD AND GROWTH CHARACTERISTICS OF SILVER CARP(HYPOPHTHALMICHTHYS MOLITRIX) AND BIGHEAD CARP(ARISTICHTHYS MOBILIS) IN JINSHAHE RESERVOIR

Age composition and growth characters were studied to silver carp(Hypophthalmichthys molitrix) and bighead carp(Aristichthys mobilis) specimens collected from September to November 2007 in Jinshahe reservoir.The results showed that the age composition of silver carp and bighead carp in the reservoir was dominated by 3-and 4-years old fishes in catches.The interrelation formulas between the body length(L) and weight(W) of silver carp and bighead carp were WH=1.0×10-4L2.513 5 and WA=2.7×10-5L2.870 5,respectively.Their growth could be described by the von Bertalanffy equation.The equation of silver carp were LH=112.124 4[1-e-0.154 4(t+0.137 1)]and WH=14 189.16[1-e-0.154 4(t+0.137 1)]2.513 5.The equation of bighead carp were LA=68.538 2[1-e-0.396(t-0.323 9)] and WA=5 101.875[1-e-0.396(t-0.323 9)]2.870 5.The growth inflection point of silver carp and bighead carp were 5.83 and 3.0.Compared with different reservoirs,the growth of silver carp is faster than bighead carp in Jinshahe reservoir.At last,the paper put forward the suggestion about stocking and fishing of silver carp and bighead carp to Jinshahe reservoir.