EFFECT OF DIFFERENT WEIGH OF COMMON CARP FISH BY USING TWO DIFFERENT NUTRITION SYSTEM ON ZOOPLANKTON IN PRODUCTIVE CULTURE PONDS

S. Sabri, M.; A. Ahamed, H.; A. Salah, K.

	EFFECT OF DIFFERENT WEIGH OF COMMON CARP FISH BY USING TWO DIFFERENT NUTRITION SYSTEM ON ZOOPLANKTON IN PRODUCTIVE CULTURE PONDS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 5, 2009, Pages 0-0
Authors
M. S. Sabri; H. A. Ahamed; K. A. Salah
Abstract
The aim of the present investigation was to study the coexistence of plantation of different weights of common carp fish Cyprinus carpio (W1=200, W2=50,W3=15,W4=5gm) in the earthen ponds on the productively of ponds and natural food in productive ponds. This project was carried out in AL-Shark AL-Awsat fish farm for production and the marking of the fish (stock company) during the period from first of March 2004 to the first of November 2004. Carp Fish was planted with different weights (5،15، 50و200g) in 16 earthen ponds. The area of each pond was 40 dounnm. The fish were distributed randomly on 8 treatments and in duplicate. Fish were fed on diet (1) contain 14.5% crude protein during the period from first of April till the end of September, and used the diet (1) for feeding the fish planted in the first group (W1، W2، W3، W4) during the period from first of March till 15 of July and was fed diet (2) contained 18.16%crude protein during the period from 16 of July till the end of September. Data were analyzed by a complete randomized design and the mean value was compared by Duncan's multiples range tests. The ecological study showed no changes among the ponds during the same month, the results showed slight difference during culture period for water temperature of earthen ponds that ranged from 14.c-28.5cº, 6.55- 9.75mg/ L, pH ranged from 0.26 – 1.00 ppt and the transparency ranged from 22-40 cm.،the whole changes in the physical and chemical characters of the water of earthen ponds were within the range tolerable by the common carp, grass carp and silver carp The result showed increased zooplankton population or density in earthen ponds through April and May and decreased in June and July for and after that slight increased through August, September and October for the fish in the treatments fed on diet (1), while the fish for the treatments fed on diet (1) and diet (2) the zooplankton in the earthen ponds through April and May were highly increase and after that the zooplankton in earthen ponds was slightly decreased in the June and July, after the earthen pond fertilized the zooplankton was increased. Thus it is appeared that fertilization of ponds flourished the natural food available for fish during rearing period.

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