Availability of minerals in rendered meat and bone meal for Nile tilapia: Preliminary observations |
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| Authors: | L B de Moura T O Xavier D A V Campelo M Michelato F L Alves de Almeida L V O Vidal W M Furuya |
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| Affiliation: | 1. Universidade Estadual de Maringá, Maringá, Brasil;2. Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil;3. Universidade Federal da Bahia, Salvador, Brasil |
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| Abstract: | A digestibility trial was conducted with 180 Nile tilapia (32.65 ± 4.52 g) fed a reference diet containing 350 g/kg crude protein and 4,500 kcal/kg gross energy. Five different meat and bone meals (MBMs) were evaluated. The test diets compound by 70% of reference diet and 30% of each MBM were elaborated and classified according to ash content: MBM‐430, MBM‐400, MBM‐370, MBM‐340 and MBM‐310. The apparent availability coefficient (AAC) of minerals and the apparent digestibility coefficient (ADC) of dry matter (DM) were subjected to one‐way analysis of variance (p < .05). Differences among ADC and AAC were determined by Tukey's multiple range test (p < .05). When appropriate, a polynomial regression analysis was performed. Linear correlation analyses between MBM chemical composition and the AAC and ADC were performed (p < .01). Higher values of ADCDM, AACCa and AACP were observed in MBM‐310, while low values were observed in MBM‐430. Quadratic effects of ash, P and Ca contents on AACCa, AACP and ADCDM were observed. The AACCa, AACP and ADCDM indicated a negative correlation with ash, P and Ca contents. MBM‐310 exhibited the highest mineral AAC, which could be used as a mineral source for Nile tilapia. |
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| Keywords: | animal by‐products antagonism calcium correlation
Oreochromis niloticus
phosphorus |
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