E3S Web Conf.
Volume 37, 2018The Sixth International Congress “Water, Waste and Environment” (EDE6-2017)
|Number of page(s)||9|
|Section||Protection of Water Resources – Groundwater Contract|
|Published online||25 May 2018|
Assessment of the effects rejections of feed fish on water resources.: (Ouedoumerrbia, Morocco)
Environnemental engineering Teams. Department of Biology, Facylty of Sciences and Techniques Beni-Mellal. University Sultan Moulay Slimane. M’ Ghila, B.O 523. 23 000 Beni-Mellal, Morocco
(2. Fish Farming AinAghbal, Azrou – Morocco.
Khadija Ouaissa1 : Email firstname.lastname@example.org
In order to compare the effects of three types of extruded food (A, B and C) on the growth of rainbow trout, an experimental test was conducted on June 15, 2015 at a rainbow trout farming station near river of Oumerrrabi .Morocco.
The comparison of three foods of different composition and energy is performed in isoenergetic conditions.
Six basins were used for this comparative test. These basins are fed with fresh water according to the open circuit with a renewal of twice an hour. The initial feeding conditions were the same for the three food types and the initial density of 1, 58 kg/m3 (kg by volume) and an initial flow rate of 1, 04 m3/h.
Fish are fed by ratios two to three times a day depending on the magnification stage.
The sampling frequency is fortnightly, where we measure the zootechnical performance of fish and collect water samples for physicochemical analyses in order to assess the quality of the water leaving in the basins before their discharge into the river of Oum Er-Rbia.
The comparative trial of three fish foods (A, B, and C) revealed that diet B is the better formulation reflected by the zootechnical performances and low phosphate release than diet A and C.
Key words: Food / biochemical / Performance / Releases / Environment / OumErRbia / Morocco
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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