Scholarlink

<p>This study evaluated the effects of partial feed restriction at 1% and 0.5% of live weight (LW) on tambaqui (<i>Colossoma macropomum</i>) juveniles, focusing on growth, carcass composition, health, and tissue morphology. A total of 576 fish (initial weight: 168.7 ± 9.40&#xa0;g) were distributed across 18 tanks (<i>n</i> = 6 per treatment) and fed a commercial extruded diet with 32% crude protein. Fish were assigned to three groups: PR1 (1% LW), PR0.5 (0.5% LW), and CG (control), in a recirculating aquaculture system. After 28 days of restriction, all groups were re-fed at 3% LW for 56 days and 2.5% LW for 28 days, totaling 112 days. Biometric, organ, and blood analyses were performed on days 0, 28, and 112. Statistical analysis used one-way ANOVA and Tukey’s test (<i>p</i> &lt; 0.05).On day 28, PR1 and PR0.5 showed lower body weight, condition factor, cholesterol, triglycerides, and reduced hepatosomatic and visceral fat indices vs. CG (<i>p</i> &lt; 0.05), without hematological or histological impairment. By day 56, weight gain and feed efficiency improved in both restricted groups. On day 84, PR1 matched CG, while PR0.5 remained lower. At the end (day 112), no significant differences were observed among treatments.. In conclusion, restricting feed up to 0.5% LW for 28 days, followed by refeeding, supports compensatory growth without compromising health, carcass traits, or muscle morphology, representing a feasible and sustainable feeding strategy for tambaqui farming.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Partial feed restriction and refeeding in rearing Colossoma macropomum juveniles in a recirculating aquaculture system

  • 期刊论文

  • 发表日期：

    2025年6月9日

查看全文
  • Thiago Santana Cotrim,
  • Jayme Aparecido Povh,
  • Danilo Henrique Aguiar,
  • Susana Amaral Texeira,
  • Lucas de Oliveira Brasileiro,
  • Louise Nex Spica,
  • Rebeca Maria Sousa,
  • Giovanna Rodrigues Stringhetta,
  • Rafaela Martins Ferreira,
  • Bruna Vougado da Silva,
  • Raychson de Oliveira Ferreira,
  • Ricardo Henrique Bastos de Souza,
  • Ruy Alberto Caetano Corrêa Filho

摘要

This study evaluated the effects of partial feed restriction at 1% and 0.5% of live weight (LW) on tambaqui (Colossoma macropomum) juveniles, focusing on growth, carcass composition, health, and tissue morphology. A total of 576 fish (initial weight: 168.7 ± 9.40 g) were distributed across 18 tanks (n = 6 per treatment) and fed a commercial extruded diet with 32% crude protein. Fish were assigned to three groups: PR1 (1% LW), PR0.5 (0.5% LW), and CG (control), in a recirculating aquaculture system. After 28 days of restriction, all groups were re-fed at 3% LW for 56 days and 2.5% LW for 28 days, totaling 112 days. Biometric, organ, and blood analyses were performed on days 0, 28, and 112. Statistical analysis used one-way ANOVA and Tukey’s test (p < 0.05).On day 28, PR1 and PR0.5 showed lower body weight, condition factor, cholesterol, triglycerides, and reduced hepatosomatic and visceral fat indices vs. CG (p < 0.05), without hematological or histological impairment. By day 56, weight gain and feed efficiency improved in both restricted groups. On day 84, PR1 matched CG, while PR0.5 remained lower. At the end (day 112), no significant differences were observed among treatments.. In conclusion, restricting feed up to 0.5% LW for 28 days, followed by refeeding, supports compensatory growth without compromising health, carcass traits, or muscle morphology, representing a feasible and sustainable feeding strategy for tambaqui farming.