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Titel
Growth performance and survival rate of African catfish larvae Clarias gariepinus (Burchell 1822) fed on different types of live and formulated feeds / by: Tarekegn Arage Ayele
VerfasserAyele, Tarekegn Arage
Betreuer / BetreuerinWaidbacher, Herwig ; Dagne, Adamneh ; Meulenbroek, Paul ; Alemayehu Esayas
Erschienen2015
UmfangVII, 79 Bl. : Ill., graph. Darst.
HochschulschriftWien, Univ. für Bodenkultur, Masterarb., 2015
SpracheEnglisch
DokumenttypMasterarbeit
Schlagwörter (DE)Clarias.gariepinus, feeds, Daphnia magna, Ostracoda, commercial feed, fish meal mix and soybean meal mix, growth, Crude protein
Schlagwörter (EN)Clarias.gariepinus, feeds, Daphnia magna, Ostracoda, commercial feed, fish meal mix and soybean meal mix, growth, Crude protein
Schlagwörter (GND)Clarias gariepinus / Aquakultur / Fischfutter
URNurn:nbn:at:at-ubbw:1-6920 Persistent Identifier (URN)
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Growth performance and survival rate of African catfish larvae Clarias gariepinus (Burchell 1822) fed on different types of live and formulated feeds [2.67 mb]
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Zusammenfassung (Deutsch)

Catfish (Clarias gariepinus) is one of the best candidate aquaculture species. Feed plays the major role on culturing fish, especially at early stages. In thirty two days of the experimental period, this study investigated growth and survival rates of Clarias gariepinus larvae by feeding Daphnia magna, Ostracoda (Heterocypris incongruens), commercial feed, fish meal mix and soybean meal mix. The trials were conducted in 25 tanks, with 150 fish per tank, 5 treatments and 5 replicas. Water flow with the help of oxygen aerator was allowed, and a feeding frequency of three times per day was applied. Water quality was in an accepted range of a mean temperature 26.3 1OC, Oxygen 5.8 0.35mg/L (94.3 4.5 %), pH 7.7 0.1 and ammonia concentrations was less than 0.2mg/l in all treatments. Before weaning strategy was practiced, Artemia nauplii were used as starter feeds that gave an overall average growth of 6.03 mm TL and 2.25 mg TW. Among the five treatments, larvae fed on Daphnia demonstrated the highest growth performance in terms of mean monthly weight gain (79.75 mg) and change in length (14.77 mm). The next on the ranking is commercial feed (57.75mg and 12.87mm), followed by Ostracoda (53.75mg and 12.07mm), then fish meal mix (23.75mg and 8.67mm) and lastly, soybean meal mix (21.75mg and 8.27). There was a significant difference recorded between treatments (P<0.05). Best survival rate of 84.46.6% was documented on commercial feed. Whereas 76.3 7%, 70.96.4%, 59.5 4.9%, 56.3 2.5 was recorded retrospectively on the groups Ostracoda, Daphnia, fish meal mix, soybean meal mix. Significant difference between each treatments (P <0.05) was also recorded. The lowest result was due to low digestibility and palatability, this drive for more study on locally formulated feed. More studies on Ostracoda will be needed. The data were analysed to determine the significant difference and homogeneity among treatments by one-way ANOVA.

Zusammenfassung (Englisch)

Catfish (Clarias gariepinus) is one of the best candidate aquaculture species. Feed plays the major role on culturing fish, especially at early stages. In thirty two days of the experimental period, this study investigated growth and survival rates of Clarias gariepinus larvae by feeding Daphnia magna, Ostracoda (Heterocypris incongruens), commercial feed, fish meal mix and soybean meal mix. The trials were conducted in 25 tanks, with 150 fish per tank, 5 treatments and 5 replicas. Water flow with the help of oxygen aerator was allowed, and a feeding frequency of three times per day was applied. Water quality was in an accepted range of a mean temperature 26.3 1OC, Oxygen 5.8 0.35mg/L (94.3 4.5 %), pH 7.7 0.1 and ammonia concentrations was less than 0.2mg/l in all treatments. Before weaning strategy was practiced, Artemia nauplii were used as starter feeds that gave an overall average growth of 6.03 mm TL and 2.25 mg TW. Among the five treatments, larvae fed on Daphnia demonstrated the highest growth performance in terms of mean monthly weight gain (79.75 mg) and change in length (14.77 mm). The next on the ranking is commercial feed (57.75mg and 12.87mm), followed by Ostracoda (53.75mg and 12.07mm), then fish meal mix (23.75mg and 8.67mm) and lastly, soybean meal mix (21.75mg and 8.27). There was a significant difference recorded between treatments (P<0.05). Best survival rate of 84.46.6% was documented on commercial feed. Whereas 76.3 7%, 70.96.4%, 59.5 4.9%, 56.3 2.5 was recorded retrospectively on the groups Ostracoda, Daphnia, fish meal mix, soybean meal mix. Significant difference between each treatments (P <0.05) was also recorded. The lowest result was due to low digestibility and palatability, this drive for more study on locally formulated feed. More studies on Ostracoda will be needed. The data were analysed to determine the significant difference and homogeneity among treatments by one-way ANOVA.