| AutorIn | | Name: | Abelneh Yimer Melaku | Beurteilende(r)| Name: | Ao.Univ.Prof. Dr.phil. Herwig Waidbacher | | Herkunftsbetrieb: | | | 1.Mitwirkender | | Name: | Ao.Univ.Prof. Dipl.-Ing. Dr.nat.techn. Werner Zollitsch | | Herkunftsbetrieb: | | | Arbeit | | Typ der Arbeit: | Masterarbeit | | Sprache der Arbeit: | Englisch | | Titel der Arbeit in Originalsprache: | Effects of feed additives (premix) on growth performance of three Oreochromis niloticus L., (1758) Ethiopian strains in concrete ponds, Sebeta Ethiopia | | Titel der Arbeit in deutsch: | Effects of feed additives (premix) on growth performance of three Oreochromis niloticus L., (1758) Ethiopian strains in concrete ponds, Sebeta Ethiopia | | Titel der Arbeit in englisch: | Effects of feed additives (premix) on growth performance of three Oreochromis niloticus L., (1758) Ethiopian strains in concrete ponds, Sebeta Ethiopia | | Publikationsmonat: | 06.2014 | | Seitenanzahl: | 84 | | Online-Katalog der Universitätsbibliothek Bodenkultur | | AC-Nummer: | AC11808645 | | Abstract | | Abstract in Deutsch: | This study was conducted to evaluate the effects of feed additives (premix) on growth performance of three strains of Juvenile Nile tilapia (Oreochromis Niloticus l., (1758)) in concrete ponds. The feeding trial was conducted in eighteen experimental units of 25m2 each. The experimental groups were run in triplicates with stocking density of 2fish/m2. The treatment groups were fed at 5% of their body weight with the respective test feeds (with and without premix). The result of the experiment shows that fish which received premix grew faster (p < 0.05) than the fish which received no premix. Regarding the effects of adding the premix, the Chamo strain grew faster (p < 0.05) than the Hashenge and Tana strains; it had a growth rate of 0.33 g/day. The reason for the better growth performance of fish which received the premix can be explained by better metabolic activities, better health and a balanced diet as compared to the fish which received no premix. Generally, the growth rate of the fish was low as compared to other studies. This was attributed to low temperature condition and mixed sex culture (highly social hierarchy was observed during sampling period). There were no differences in the water quality, phytoplankton and zooplankton composition between the two treatments observed. Additionally it is shown that the usage of feeding plates have several positive aspects in aquaculture. | | Abstract in Englisch: | This study was conducted to evaluate the effects of feed additives (premix) on growth performance of three strains of Juvenile Nile tilapia (Oreochromis Niloticus l., (1758)) in concrete ponds. The feeding trial was conducted in eighteen experimental units of 25m2 each. The experimental groups were run in triplicates with stocking density of 2fish/m2. The treatment groups were fed at 5% of their body weight with the respective test feeds (with and without premix). The result of the experiment shows that fish which received premix grew faster (p < 0.05) than the fish which received no premix. Regarding the effects of adding the premix, the Chamo strain grew faster (p < 0.05) than the Hashenge and Tana strains; it had a growth rate of 0.33 g/day. The reason for the better growth performance of fish which received the premix can be explained by better metabolic activities, better health and a balanced diet as compared to the fish which received no premix. Generally, the growth rate of the fish was low as compared to other studies. This was attributed to low temperature condition and mixed sex culture (highly social hierarchy was observed during sampling period). There were no differences in the water quality, phytoplankton and zooplankton composition between the two treatments observed. Additionally it is shown that the usage of feeding plates have several positive aspects in aquaculture. | | Schlagworte | | Schlagwörter Deutsch: | Oreochromis niloticus, premix, vitamines, minerals, Pond culture, water quality, nutrients, plankton composition, growth performance, Length-weight relationship, strains, feeding plate | | Schlagwörter Englisch: | Oreochromis niloticus, premix, vitamines, minerals, Pond culture, water quality, nutrients, plankton composition, growth performance, Length-weight relationship, strains, feeding plate | | Sonstiges | | Signatur: | D-17092 | | Organisationseinheit, auf der die Arbeit eingereicht wird: | H81200 Institut für Hydrobiologie und Gewässermanagement (IHG) | |
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