The in vivo activities of inulin and ascorbic acid were evaluated experimentally via using 450 Nile tilapia (Oreochromis niloticus) that were distributed into 3 equal groups (each of three replicates). Fish of the first group served as a control and received a balanced diet free from inulin and vitamin C. The second fed on balanced diet supplemented with inulin (5 g kg1), whereas, the third one received a balanced diet supplemented with vitamin C (500 mg kg1). The survival and growth perf...
The purpose of this study was to examine the effect of some immunostimulants and probiotics on the survival rate, final weight, and disease resistance of overwintered tilapia fry. There were five treatments: T1 (control) fed a balanced diet (35% protein) without additives. Treatments 2 to 5 were fed diets supplemented with 4% garlic, 4 g/kg Echinacea, 4 g/kg Organic Green or 4 g/kg Vet-Yeast, respectively. Growth and resistance to disease challenge with Aeromonas hydrophila and Pseudom...
This study was conducted in order to evaluate the potential bene¢t of Bacillus pumilus and a commercial product (‘Organic Green’TM) as a probiotic in the culture of the tilapia nilotica. Two doses of B. pumilus (106 and 1012 g1 diet fed) and Organic GreenTM (1 and 2 g kg1 diet fed) were used as feed additives and administered for periods of 1 (groups 2, 3, 4 and 5 respectively) and 2 (groups 6, 7, 8 and 9 respectively) months; group 1 served as a control. Each group consisted of...
A total of one thousand Oreochromis niloticus held in earthen ponds of the WorldFish Center were used in this study. Forty of these were randomly collected from the ponds and subjected to bacteriological and pathological examination where a variety of 80 bacteria were isolated. Among those 15 bacterial isolates were examined for their probiotic activity through studies performed in vitro and in vivo. Aeromonas hydrophila, Citrobacter freundii, Pseudomonas species and two Gram-positive isola...
Three dosage levels of black seed, garlic and commercial Biogen were administered for three months in summer and six months in winter to test their stimulation effect on growth, survival and response to challenge infection in Oreochromis niloticus. At the end of summer, no significant difference was observed in the growth performance of O. niloticus with most treatments, but the level of non-specific mortalities was reduced in all treatment groups compared to the control group. Significant...
The probiotic activity of two bacteria (Bacillus subtilis and Lactobacillus acidophilus) was evaluated by its effect on the immune response of Nile tilapia (Oreochromis niloticus), beside its protective effect against challenge infections. Furthermore, their in-vitro inhibitory activity was evaluated. The in-vitro antimicrobial assay showed that Bacillus subtilis and Lactobacillus acidophilus inhibited the growth of A. hydrophila. The B. subtilis inhibited the development of P. fluorescen...
To evaluate the effect of some immunostimulants on growth performance parameters, survival rate and diseases resistance of Nile tilapia fry reared under different stocking densities, a total number of 2250 Oreochromis niloticus fries (0.3 ±0.05 g) were stocked at (2, 4, and 6 fry/m3) and provided with dietary supplementation of (Garlic 40 g/kg, purpurea extract 4 g/kg, Organic GreenTM 4 g/kg and Vet-YeastTM 4 g/kg of the diet) for a five-month period. The obtained results indicated that, sto...
This work aimed to investigate the role of some immunostimulants and probiotics in improving the response of overwintered tilapia to Aeromonas hydrophila vaccine. In this study, 15000 Nile tilapia fry (Orechromis niloticus) were collected and divided into five groups. Group 1 was the control, groups 2 to 5 were fed diet supplemented with garlic, Echinacea, Organic GreenTM and Vet-YeastTM respectively for 5 months. Vaccination with A. hydrophila bacteria was done by the end of the feeding e...
Our aim was to detect potential pathogens in diseased tilapia that might account for the high summer mortalities observed in Egyptian fish farms. To this end, diseased fish were examined from eight farms in different areas of the Nile delta. Here, we report the detection of Aeromonas species and, for the first time, the presence of TiLV in Egyptian tilapia aquaculture.
Egyptian fish farms have faced unexplained mortality of tilapia during the summer months in recent years. Epidemiological surveys indicated that 37% of fish farmswere affected in 2015with an averagemortality rate of 9.2% and a potential economic impact of around US$ 100 million. Despite a number of researchers and organizations investigating potential causes results so far have been inconclusive. Meanwhile recent reports emerged of the presence of a new orthomyxovirus, Tilapia Lake Virus ...
ABSTRACT This project work was carried out to determine the Effects of Dietary Supplementation of Eucalyptus globulus leaves in the diet of Heterobranchus bidorsalis Fingerlings. Growth and nutrient utilization was studied for 70 days in 50 liters rectangular plastic tanks. Tanks were grouped into five (5) treatments in triplicates (ControlR1-3), (EG1R1-3), (EG2R1-3), (EG3R1-3) and (EG4R1-3). One hundred and fifty (150) fingerlings of Heterobranchus bidorsalis used were randomly distributed ...
ABSTRACT Physical water quality parameters were conducted to assess raised fish pond waters in South Eastern Kenya University in relation to their potential for catfish culture uses. Water conductivity, TDS, salinity DO and temperature were monitored for a time period of two months in relation to feeding and growth of Clarias gariepinus. The physical water quality parameters results revealed a rising trend behavior thought the study. The result revealed that the physical water quality variab...
ABSTRACT This project details the results of a research work carried out to develop fish feed compounded from locally available materials in the institute of oceanography fish farm and analyzed its nutritional values, in the biochemistry department all in the University of Calabar. On the basis of the feed production, it is recommended that the feeding regime of the animal (fish) for intended culture is known, a dry diet formulation of two distinct feed lines was produced (fingerlings and adu...
Table of Content ACKNOWLEDGEMENT List of Tables Chapter One 11.1 Introduction 11.2 Problem of statement 1.3 Justification of the study 1.5 Objectives 1.6 Hypothesis Chapter Two 2.0 Literature Review 2.1 Morphometric variations of catfish species 2.2 Length- weight relationship of Clariid family 2.3 Condition factor of Clarias 3.0 Chapter three 3.1 Materials and methods 4a) Study area 4b) Sample collection 3.2 Data analysis 20a) Morphometric variations among three C. Liocephalus, C. gari...
ABSTRACT This study, proximate and mineral compositions of Macrobrachium macrobrachion, was conducted to evaluate the nutritive quality of the prawn. Thirteen samples of Macrobrachium macrobrachion were procured from prawn mongers at Igbokoda in Ondo State, and were identified using Identification sheet by FAO and Powell. Prawn samples were prepared for analysis: smoke-dried, separated into whole body, flesh (edible portion) and waste, and weighed. The flesh were ground into fine powder and s...