Details

Autor(en) / Beteiligte

• Ballester, Eduardo Luis Cupertino
• dos Santos, Lilian Dena
• Piovesan, Vanessa
• Zadinelo, Izabel Volkweis

Titel

Gross energy levels in practical diets for the Amazon river prawn postlarvae, Macrobrachium amazonicum

Ist Teil von

• Latin american journal of aquatic research, 2023-05, Vol.51 (2), p.324-330

Ort / Verlag

Valparaiso: Pontificia Universidad Catolica de Valparaiso, Escuela de Ciencias del Mar

Erscheinungsjahr

2023

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• The present study evaluated the effect of different energy levels (15.07, 15.91, 17.17, 18.00, and 19.68 kJ [g.sup.-1] of diet) on isoproteic practical diets for Macrobrachium amazonicum during the nursery phase on the zootechnical performance and proximate composition of the whole body. Postlarvae with a mean weight of 0.043 [+ or -] 0.01 g were stored in 25 experimental units, at 150 animals per [m.sup.2], in a completely randomized design with five treatments and five replicates. The post-larvae were evaluated at the end of the experimental period according to the pre-established performance parameters. The analysis of variance for regression ([alpha] = 0.05) allowed us to estimate that the maximum final weight was observed in the treatment with 16.74 kJ [g.sup.-1]. In contrast, the lowest apparent feed conversion was observed at the 16.43 kJ [g.sup.-1] level. The best values were found in 17.29 and 17.50 kJ [g.sup.-1], respectively, for the energy and protein retention rates. As the best fit of the equation was presented for the energy retention ratio ([R.sup.2] = 0.63), which approached the treatment of 17.17 kJ [g.sup.-1], this energy level is recommended in postlarvae diets.