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Heterotis Niloticus (Heteroti + niloticu)

Distribution by Scientific Domains
Earth and Environmental Science100%

Selected Abstracts

Influence of dietary protein levels on growth performance and body composition of African bonytongue fingerlings, Heterotis niloticus (Cuvier, 1829)

AQUACULTURE NUTRITION, Issue 2 2010
S.-E. MONENTCHAM
Abstract Two experiments were conducted to examine the influence of dietary protein levels on growth and carcass proximate composition of Heterotis fingerlings. Four isoenergetic practical diets were formulated to contain dietary protein levels from 250 to 400 g kg,1 diet. Replicate groups of young Heterotis (initial live weight 3.96 and 26.40 g in experiments 1 and 2 respectively) were handfed twice daily to apparent satiation for a period of 42 and 28 days respectively. Statistical analysis revealed that growth rate was significantly affected by dietary protein level (P < 0.01). The highest weight gain was observed in fingerlings fed with 300 and 350 g protein kg,1 diet for fish size ranging between 3,15 and 26,62 g respectively. There was no significant difference between groups fed with 300, 350 and 400 g protein kg,1 diet for Heterotis fingerlings (3,15 g) in the one hand; in the other hand, significant differences were found between fish (26,62 g) fed with 350 g protein kg,1 diet and those receiving 300 and 400 g protein kg,1 diet, with no significant difference between each other. The specific growth rate varied from 2.4% to 3.1% day,1. The whole-body protein, lipid, moisture and ash contents were not significantly affected by dietary protein levels (P > 0.05). The relationships between percentage weight gain and dietary protein levels suggested very similar dietary protein requirement (about 310 g crude protein kg,1 diet) for Heterotis ranging from 3 to 62 g. The maximum growth occurred at about 345 g protein kg,1 diet. [source]

Partial substitution of fish meal with soybean and cottonseed meals in diets for African bonytongue, Heterotis niloticus (Cuvier, 1829) fingerlings: effects on growth, feed efficiency and body composition

AQUACULTURE RESEARCH, Issue 10 2010
Serge-Eric Monentcham
Abstract A feeding trial was conducted to examine the suitability of soybean meal (SBM) and cottonseed meal (CSM) as a partial substitute for the dietary protein supplied by fish meal for H. niloticus fingerlings. Fish were fed with four isonitrogenous (350 g kg,1 crude protein) and isoenergetic (18.8 kJ g,1 GE) diets in which fish meal protein was gradually replaced by plant protein from a mixture of SBM and CSM (0%, 25%, 50% and 75% in diets 1, 2, 3 and 4 respectively). Triplicate groups of fingerlings H. niloticus (mean weight of 5 g) were handfed twice daily to apparent satiation for 60 days inside net hapas. Growth performances (SGR varied from 3.09% to 3.16% day,1) of fingerlings fed diets containing 0%, 25% and 50% plant protein were not significantly different (P>0.05). At 75% fish meal substitution, growth and feed utilization efficiency indicators were significantly reduced (P<0.05). The carcass composition were also significantly (P<0.05) affected by the replacement level of fish meal, except dry matter and ash. Results suggest that the dietary fish meal protein could efficiently be substituted by a mixture of soybean and cottonseed meals up to 50%, without adverse effects on maximal growth in practical diets for H. niloticus fingerlings. [source]

Growth, feed utilization and body composition of African bonytongue, Heterotis niloticus, fingerlings fed diets containing various protein and lipid levels

AQUACULTURE RESEARCH, Issue 10 2010
Serge-Eric Monentcham
Abstract In order to evaluate the effects of dietary protein and lipid levels on the growth, feed utilization and body composition of Heterotis niloticus fingerlings, a factorial experiment with three replicates was conducted. Six experimental diets containing three crude protein levels (28%, 32% and 36%) and two crude lipid levels (6% and 13%) were tested. Heterotis niloticus (2.34 g) were fed with the diets to apparent satiation, twice a day. For 56 days, weight gain (WG), specific growth rate (SGR), feed efficiency (FE) and protein retention (PR) were significantly affected by dietary protein and dietary lipid levels respectively (P<0.01). The highest WG, SGR and FE were observed for fingerlings fed the diet containing 36% protein and 6% lipid, but no significance difference was found between groups fed with the following diets: P28L13 (28% protein and 13% lipid), P32L6, P32L13 and P36L13. A significant interaction between dietary protein and lipid was observed for WG, SGR, FE and PR. The whole-body protein, lipid, moisture and ash content were not significantly affected by dietary lipid levels, but body protein and lipid content were significantly affected by dietary protein. The dietary protein-sparing effect was clearly demonstrated when the dietary energy of lipid increased from 17 to 19.6 kJ g,1 at 28% crude protein on H. niloticus. [source]