03023cam a2200349 a 4500 EG-GiCUC 20250223032557.0 200913s2020 ua do f m 000 0 eng d EG-GiCUC eng EG-GiCUC eng Deposite Ph.D Cai01.07.03.Ph.D.2020.Am.I Amany Abdelaal Galal Abdelaal Influence of local climate and dietary protein level on growth and feed performance of nile tilapia under integrated biofloc and aquaponic conditions / Amany Abdelaal Galal Abdelaal ; Supervised Mohamed Elnady Ahmed Mohamed , Mohamed Ali Ibrahim Salem , Neveen Elsayed Metwally تأثير المناخ المحلى و مستوى بروتين العليقة على أداء النمو و التغذية فى البلطى النيلى تحت الظروف التكاملية للبيوفلوك و الأكوابونيك Cairo : Amany Abdelaal Galal Abdelaal , 2020 170 P. : charts , photpghrphs ; 25cm Thesis (Ph.D.) - Cairo University - Faculty of Agriculture - Department of Animal Production The current experiment was designed to test the effect of crude protein content (25, 30 and 35% C.P.) as well as restricted feeding in biofloc culture on growth performance of Nile tilapia (Oreochromis niloticus),and water quality dynamics and aquaponic production of lettuce plants (red leaves lettuce).Starting with average initial weights of 13.5 to 20.3 grams/fish, Nile tilapia juveniles grew to harvest weight of 310.2 to 342.1 grams/fish. Increasing dietary protein from 30% to 35% within the biofloc treatments did not improve final body weight at harvest. It is recommended to feed Nile tilapia at crude protein level 30% in order to obtain acceptable growth with economic returns. Among the dietary treatments, Nile tilapia had higher FCR with the 25% crude protein treatment (2.23:1) compared to all FCR values obtained by other treatments (1.51 - 1.87). The deterioration in feed conversion ratios in 25% crude protein treatment was due to the slightly slow growth rate of Nile tilapia which was negatively affected by lower protein content. The results of the current study demonstrated that when Juveniles of Nile tilapia were reared in the biofloc tanks, the amount of daily feed inputs can be reduced without affecting the production costs. Aquaponic production of plants included three cycles lettuce production during fall, winter and 2nd summer.The duration of lettuce culture lasted for 30 day during each season Issued also as CD Crude protein Nile tilapia Restricted feeding Mohamed Ali Ibrahim Salem , Supervisor Mohamed Elnady Ahmed Mohamed , Supervisor Neveen Elsayed Metwally , Supervisor http://172.23.153.220/th.pdf Nazla Revisor Shimaa Cataloger ddc TH 77718 77718 ddc 0 CUCL cl210 2024-02-11 Cai01.07.03.Ph.D.2020.Am.I 01010110081523000 2023-09-22 00:00:00 TH ddc 0 CUCL cl2u8 2024-02-11 Cai01.07.03.Ph.D.2020.Am.I 01020110081523000 2023-09-22 00:00:00 81523.CD CD