Pollycultur densities of Common  carp and Silver Carp in floating cages Muthanna province _   theEuphrates River.*

	Pollycultur densities of Common carp and Silver Carp in floating cages Muthanna province _ theEuphrates River.*
Jornal of Al-Muthanna for Agricultural Sciences
Article 1, Volume 4, Issue 1, 2016, Pages 1-11
Abstract
Abstract This study was conducted to demonstrate the impact of the cultivation of different densities to the thickness of common carp and silver carp mixed education of some of the growth indicators in floating cages and distributed (680 fish Carp common , 120 Carp Silver) Weights ranged from 10_15 g on four pilot transactions consisted of the treatment of the first control (T1 intensity cultivated 50 fish / m³ Carp common) and the second treatment (T2 intensity farming 45 fish / m³ Carp common , 5 fish / m³ Carp Silver) thirdtreatment (T3 intensity farming 40 fish / m³ common Carp , 10 fish / m³ Carp Silver) fourth treatment (T4 intensity farming 35 fish / m³ common Carp, 15 fish / m³ Carp Silver) I used to experience four cages made of galvanized iron with a one-size cage 4m³.The experiment lasted for four months starting from 01/10/2014 to 30/01/2015.Fish fed the four treatment on the same bush business locally manufactured, weight was measured every 15 days and evaluated according to the study criteria for growth (weight gain rate, and the rate of relative growth, specific growth rate, feed conversion rate, the proportion of protein) efficiency. The study showed that the best growth indicators obtained in the third and fourth treatment with culture density of at least common Carp with the increase in the proportion of silver carp.

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