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<p>This study evaluated the effects of different stocking densities (high density–HD: 14 fish/tank; low density–LD: 7 fish/tank) on productive performance, lipidomic profile, and fatty acid composition in GIFT tilapia juveniles. Zootechnical parameters were analyzed, including relative growth, weight gain, feed conversion ratio, and fillet yield, along with lipidomic markers and fatty acids. Results showed that high density promoted better apparent feed conversion (<i>p</i> &lt; 0.0001). However, low density led to higher apparent feed intake (<i>p</i> &lt; 0.0001) and greater fillet yield (<i>p</i> = 0.0009), suggesting these fish utilized ingested nutrients to maximize fillet production. Lipidomic analysis revealed higher phospholipid turnover in low density (LD), with increased lysophosphatidylcholines (LPC) and lysophosphatidylethanolamines (LPE), while high density (HD) showed phosphatidylcholine (PC) accumulation, indicating less efficient lipid metabolism under stress. Additionally, LD had higher concentrations of polyunsaturated fatty acids (PUFAs) (<i>p</i> &lt; 0.05), highlighting density’s influence on nutritional quality. We conclude that low stocking density suggests an improvement in productive performance and fish quality, whereas high density induces metabolic responses indicative of chronic stress related to lipid metabolism.</p>

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Stocking density modulates tilapia (Oreochromis niloticus) performance and fillet quality through phospholipid remodeling

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月25日

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  • Gabriel Roldi,
  • Samuel Robath,
  • Carla Porto,
  • Eduardo Pilau,
  • Percilia Giaquinto,
  • Joao Favero Neto,
  • Bruno Lala,
  • Gracielle Caroline Mari,
  • Carolina Toledo Santos,
  • Gabriel Naziazeno Anastácio,
  • Gabriela Hernandes Cangianelli,
  • Andre Lima Ferreira,
  • Caio César Ouros,
  • Gustavo Henrique Coelho Chavesk,
  • Maria Luiza Rodrigues Souza,
  • Diogo de Oliveira Marques,
  • Stefania Caroline Claudino-Silva

摘要

This study evaluated the effects of different stocking densities (high density–HD: 14 fish/tank; low density–LD: 7 fish/tank) on productive performance, lipidomic profile, and fatty acid composition in GIFT tilapia juveniles. Zootechnical parameters were analyzed, including relative growth, weight gain, feed conversion ratio, and fillet yield, along with lipidomic markers and fatty acids. Results showed that high density promoted better apparent feed conversion (p < 0.0001). However, low density led to higher apparent feed intake (p < 0.0001) and greater fillet yield (p = 0.0009), suggesting these fish utilized ingested nutrients to maximize fillet production. Lipidomic analysis revealed higher phospholipid turnover in low density (LD), with increased lysophosphatidylcholines (LPC) and lysophosphatidylethanolamines (LPE), while high density (HD) showed phosphatidylcholine (PC) accumulation, indicating less efficient lipid metabolism under stress. Additionally, LD had higher concentrations of polyunsaturated fatty acids (PUFAs) (p < 0.05), highlighting density’s influence on nutritional quality. We conclude that low stocking density suggests an improvement in productive performance and fish quality, whereas high density induces metabolic responses indicative of chronic stress related to lipid metabolism.