LABORATORY STUDY OF THE EFFECT OF HEXADECANOL MONOLAYER ON THE AQUATIC FAUNA (CASE OF Tilapia nilotica)

S SAGGAÏ; M.M SAGGAÏ; N HANCOCK

S SAGGAÏ UniversitéKasdi Merbah Ouargla, LaboratoireGénie de l’Eau et de l’Environnement en Milieu Saharien., Faculté des Sciences et Technologies et des Sciences de le Matière, Ouargla Algérie.2.Université Kasdi Merbah Ouargla, LaboratoireExploitation et Valorisation des Ressources Naturelles en Zones Arides, Faculté des Sciences et Technologies et des Sciences de le Matière, OuarglaAlgérie
M.M SAGGAÏ Université Kasdi Merbah Ouargla. Laboratoire Bioressources Sahariennes: Préservation et Valorisation. Faculté des Sciences de la Nature et de la Vie,Ouargla, Algérie.
N HANCOCK Universityof Southern Queensland. National Centre for Engineering inAgriculture. University of Southern Queensland. Toowoomba, Queensland 4350, Australia.

Keywords: Tilapia nilotica, Hexadecanol, glass aquaria, evaporation

Abstract

The present study aimed to investigate the effect of monolayer on the larva of Tilapia nilotica. An experiment was device consisted of 174 larva distributed in three aquariums during five weekswas installed. The first aquarium was not covered by the monolayer and considered as the control, the second one was covered by a monolayer of Hexadecanol (quantity of 0,09 g/m2) and The last aquarium was covered by a monolayer of the same alcohol (quantity of 0,15 g/m2). The results showed that the monolayer did not have a big effect on the physical parameters of the aquatic environment, but it affected the dissolved oxygen and delayed the growth of larva (size and weight) without killing them.