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Evidences of the action of essential fatty acids on sea bream neuronal activity

Evidences of the action of essential fatty acids on sea brea...

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The 14th International Symposium on Fish Nutrition & Feeding

作者： Tibiábin Benítez-Santana Mnica Betancor M~a José Caballero Eyad Atalah Eduardo Juárez-Carrillo Silvia Torrecillas Carmen M.Hernández-Cruz Marisol Izquierdo Grupo de Investigacion en Acuicultura(GIA) Instituto Canario de Ciencias Marinas and Universidad de Las Palmas de Gran Canaria.P.O.Box 35200 TeldeCanary IslandsSpain

Highly unsaturated fatty acids(HUFA),particularly docosahexaenoic acid,are known to be essential for normal development of fish neural system and,subsequently fish ***, there is a limited information on the type of effect of these fatty acids on neuron development and *** on those essential fatty acids impairs larval response to different stressors, reducing the escaping *** cells are certain neurons particularly responsible for the escaping behaviour in *** objective of the present study was to evaluate the effect of EFA on larval behaviour and mauthner cells development and *** experiments were conducted feeding 18 dah larvae for 2 weeks on different dietary sources of HUFA to evaluate their effects on larval behaviour and brain development,particularly in relation to mauthner cells. In trial 1,larvae were fed with microdiets containing soybean,linseed,rapeseed or fish oil,while in trial 2 microdiets contained different ratios of EPA/DHA(4/1;4/3;1.5/9;0.3/0.6).Behaviour was determined by measuring swimming speed of larvae from all groups was measured to obtain burst-swimming speed to sonorous *** cells activity was studied by ChAT immuno-fluorescence since acetylcholine is a major neurotransmitter in the enteric nervous system. Behaviour showed a higher response in fish fed either fish oil and or 1.5/9 microdiets suggesting the importance of DHA for the to sonorous ***,a marked inmunoreactivity was found in mauthner neurons from those fish denoting the requirement of DHA for the correct activity of those neurons and their implications on burst swimming *** intake of n-3 PUFA can leads to increased amounts of DHA in brain membranes and to associated learning and behavioural *** results show the first evidences of the action of EFA on fish neuronal activity and their implications in fish behaviour.

关键词： Sea bream mauthner cells Behaviour Essential fatty acids

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