Investigating the fecundity of pond produced breeders of Astacus leptoductylus

Crayfish is one of the most important and expensive aquatics of freshwater that in recent years,because of increasing in fishing activity ,its stoks in natural water resources had been threatened seriously and even been extinct. In order to help to rebuild the resources and producing Crayfish breeder, a project was done that named “producing Crayfish in the pool environment, with three treatment and repeating and with dencities of 3,5,7 pieces per square meter .The results of studying of Investigation and the number if eggs clinging to the swimming legs(Pleopodal eggs) and its relation to length,weight and age parameters, indicates their direct connection. That ,relative Investigation of three years old breeders have been more that two years old breeders,this difference have been statiscally significant. The breedres with more length, more weight and more age,have larger eggs and as a resuit, have less fecundity and are the opposite. Two years old female breedres with an average of 101/62 mm in length and 55.96g in weight,have relative fecundity of 2/08±0/53 and the breeders with an average,of 132/78 mm in length and 87/20g in weight,have relative Investigation of 2/18±0/64 . The Resulting data, statistically analyzed by using of spss14  software and with confidence level of 0/05 .