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- Title
Effect of replacing different levels of dietary fishmeal with Jatropha curcas kernel meal on the development of Nile tilapia Oreochromis niloticus ( Linnaeus, 1758).
- Authors
Krome, C.; Jauncey, K.; Fedderke, S.; Focken, U.
- Abstract
The present trial tested the applicability of Jatropha curcas kernel meal ( JKM) as a protein source in diets for Nile tilapia ( Oreochromis niloticus) in terms of growth and body composition. Four diets were produced replacing 0% (Control), 50% (J50), 75% (J75) and 100% (J100) of fishmeal with JKM. In a fifth diet, 70% of fishmeal was replaced by JKM, and another 20% replaced by blood meal to minimize crystalline lysine addition. Body mass gain of fish fed the control diet was significantly higher than in all other treatments. However, specific growth rate ( SGR) and feed conversion ratio ( FCR) were not significantly different between diets J50, J75 and the control. Fish fed the control diet had a lower body protein content, but higher body fat and energy content than fish fed the JKM-based diets. An adaptation of fish fed diets J50, J75 and J100 could also be observed, as these diets showed worse FCR-values over most of the first three quarters of the experiment and equal (or in the case of J75, even significantly better) FCR-values over the final 2 weeks. Despite slightly slower growth, JKM should be further included in the search of alternative plant-feedstuffs in diets for tilapia, as the growth observed here for up to 75% replacement of fishmeal was very promising.
- Subjects
NILE tilapia; JATROPHA; FISH food; BODY composition; PROTEINS; LYSINE
- Publication
Journal of Applied Ichthyology, 2014, Vol 30, Issue 3, p507
- ISSN
0175-8659
- Publication type
Article
- DOI
10.1111/jai.12414