Phosphorus Requirement of Tambaqui Fingerlings

Abstract

The objective of this study was to determine the digestible phosphorus requirement in rations for tambaqui fingerlings (Colossoma macropomum). 900 fingerlings (0.51 ± 0.06 g) were used in a completely randomized design with six treatments, five replicates, and thirty fish per experimental unit. The treatments consisted of six diets with different digestible phosphorus levels (0.12, 0.33, 0.54, 0.75, 0.95, and 1.16%). The fish were fed six times a day, for 63 days. Performance, feed efficiency, and the daily protein, fat, ash, and phosphorus deposition rates of fish were evaluated. The treatments did not influence the feed intake. The elevation of phosphorus levels increased the digestible phosphorus intake linearly, and improved of quadratic form the weight gain, specific growth rate, feed:gain ratio, protein efficiency for weight gain, and daily protein, fat, ash, and phosphorus depositions up to the estimated levels of 0.64, 0.66, 0.70, 0.70, 0.62, 0.62, 0.70, 0.71%, respectively. The phosphorus efficiency for weight gain worsened with the elevation of phosphorus levels. The recommendation of digestible phosphorus level in rations for tambaqui fingerlings to optimize weight gain and body phosphorus deposition is 0.71%, which corresponds to the estimated level of 1.04% total phosphorus.

A Ostreicultura Enquanto Alternativa De Renda Para Populações Tradicionais Do Litoral Amazônico: O Caso Da Agromar

“…Melhorias na condição fisiológica sob alimentação com associação das vitaminas C (ácido ascórbico), E (tocoferol) e o mineral ferro foram verificadas para tambaqui por Aride (2003). Paralelamente ao ferro, outros minerais têm sido investigados para dietas de tambaqui, como ocorre com o fósforo (Sousa, et al, 2019). As vitaminas e minerais podem ser adicionados nas dietas comerciais como premix (Dairiki e Silva, 2011).…”

Methionine plus cystine to lysine ratio in diets for tambatinga fingerlings

“…The no variation in the BFD might be related to the fact that the experimental diets are isoproteic, since the energy expenditure did not vary significantly to metabolize amino acids due to the use of diets with similar energy to protein ratios. On the other hand, the increase in BAD might be related to the formation of bone tissues that are important for the support of muscle tissues (Sousa et al, 2019).…”