Nutrition Studies in European Eel (Anguilla anguilla).

Abstract

Two experiments were carried out at the Department of Animal and Fish Production Faculty of Agriculture (Saba-pasha), Alexandria University for evaluating the effects of five different levels (0, 15, 30, 45, and 60 %) of poultry by- product meal (PBM) by replacement instead of fish ml protein (Expl) and effect of the supplementing diets containing poultry by product meal Biogen™ or 17- -Estradiol and Biogen™ plus 17-fl-Estradiol

mixture (Exp2) on growth performance, feed and nutrient utilization and carcass composition for two size groups of European eel A.anguilla. Twenty of the glass aquaria where used in the frrst experiment and sixteen glass aquaria were used in the second experiment. Each measure 30x40x1OOcm with full capacity of 120 litters each aquarium however was allowed only 80 litters of waters after adapted the elvers to artificial conditions (captivity and artificial feeding). European eel (elvers and glass eels) A.anguilla were collected by fisheries from Nobaria drain near the estuary in west of Alexandria at 2lkm. Eels adapted for one month to artificial conditions (captivity and artificial feeding). Experimental healthy fish were transferred to the experimental facilities in numbers depended on the experimental design. However, in two experiments each treatment was conducted m duplicates with the exception offrrst and second experiments where two sizes of fish eel (small and medium size elvers) were used, fish were distributed randomly. Each aquarium in the tow experiments stocked with 20 fish Averages of initial weights were lgm (small) and 2 gm (medium) size elvers for and, respectively. Five experimental diets were formulated with