Resumen

LLANES, José E; BORQUEZ, Aliro; TOLEDO, José  y  LAZO DE LA VEGA, José M. Apparent digestibility of fishing waste silage in red tilapia (Oreochromis mossambicus x O. niloticus). Zootecnia Trop. [online]. 2010, vol.28, n.4, pp.499-506. ISSN 0798-7269.

By means of a design completely randomized with three repetitions, in vivo digestibility of nutrients and energy in fishing waste silages were determined for red tilapia (Oreochromis mossambicus x O. niloticus). Chemical silage prepared with sulphuric acid 98 % (20 ml/kg) and formic acid (10 ml/kg) and the biological with sugar cane molasses (150 g/kg) and of yogurt (Lactobacilus bulgaris and streptococcus acidophilus; 30 g/kg). The chromic oxide was used as inert indicator and fecal sample were recollected by siphon from the bottom of tanks. As a result, the apparent digestibility of some nutrients differed from silage type; meanwhile protein was bigger for the chemical silage and the dry matter, calcium and phosphorus for the biological silage. Similar digestibility (P>0,05) was presented for lipids, ashes and energy. In conclusion, all this showed that the fishing waste silages present high nutritional value, that constitute an alternative- protein source in the formulation of rations for red tilapias.

Palabras clave : digestibility; silage; fishing waste; tilapia.

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