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<p>The inadequate management of slaughter residues from trout and chicken viscera generates environmental and health problems. Only in Colombia, in 2020, 153,879 tons of chicken viscera and 2869 tons of trout viscera were produced. Therefore, in this research, the feasibility of using an enzymatic hydrolyzate of chicken and trout viscera as a nutritional alternative to fishmeal for feeding red Tilapia juveniles was evaluated. A completely randomized design was used with four treatments and three replicates, including a reference diet without hydrolyzate (T1) and three experimental diets with 10% (T2), 20% (T3), and 30% (T4) including hydrolyzate. 120 red Tilapia juveniles were fed until apparent satiety, and feces were collected for 42&#xa0;days to analyze digestibility and nutrient absorption. The results showed that the hydrolyzate had an adequate nutritional composition with a degree of hydrolysis of 65.07. Significant differences were observed in the apparent digestibility of dry matter, crude protein, crude energy, ethereal extract, digestible energy, and ash, calcium, and phosphorus absorption between the different treatments. The inclusion of 10% and 20% hydrolyzate showed the best results. These findings support the possibility of using trout by-products and chicken entrails as a healthier and more sustainable alternative in fish feed, reducing the environmental impact associated with inadequate management of these residues in aquaculture.</p> Graphical Abstract <p></p>

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Animal Slaughter Residues as a Nutritional Alternative to Fish Meal in Diets for Red Tilapia (Oreochromis spp)

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月5日

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  • Críspulo Perea Román,
  • Marly-Andreina Jiménez-Chamorro,
  • Yerika Jeslanny Morales Bravo,
  • Yeny-Judith Garces-Caicédo,
  • Nelson-Jose Vivas-Quila,
  • José-Luis Hoyos-Concha,
  • Ricardo Benitez-Benitez

摘要

The inadequate management of slaughter residues from trout and chicken viscera generates environmental and health problems. Only in Colombia, in 2020, 153,879 tons of chicken viscera and 2869 tons of trout viscera were produced. Therefore, in this research, the feasibility of using an enzymatic hydrolyzate of chicken and trout viscera as a nutritional alternative to fishmeal for feeding red Tilapia juveniles was evaluated. A completely randomized design was used with four treatments and three replicates, including a reference diet without hydrolyzate (T1) and three experimental diets with 10% (T2), 20% (T3), and 30% (T4) including hydrolyzate. 120 red Tilapia juveniles were fed until apparent satiety, and feces were collected for 42 days to analyze digestibility and nutrient absorption. The results showed that the hydrolyzate had an adequate nutritional composition with a degree of hydrolysis of 65.07. Significant differences were observed in the apparent digestibility of dry matter, crude protein, crude energy, ethereal extract, digestible energy, and ash, calcium, and phosphorus absorption between the different treatments. The inclusion of 10% and 20% hydrolyzate showed the best results. These findings support the possibility of using trout by-products and chicken entrails as a healthier and more sustainable alternative in fish feed, reducing the environmental impact associated with inadequate management of these residues in aquaculture.

Graphical Abstract