Scholarlink

<p>Feed efficiency (FE) is a crucial determinant of economic viability in aquaculture, with feed costs constituting 30–70% of production expenses. This study investigated the effects of temperature, diet, and age on the FE traits of the Pacific abalone (<i>Haliotis discus hannai</i>, DD) and its hybrid (<i>H. discus hannai</i> ♀ × <i>H. fulgens</i> ♂, DF) using individual-level measurements. The results from three individual feeding experiments demonstrated that the feed efficiency ratio (FER) of the abalone exhibited greater stability and lower environmental sensitivity than the residual feed intake (RFI). DF outperformed DD in FER across all temperatures, particularly at 27 °C (DD: 0.28 and DF: 0.54), highlighting its suitability for high-temperature farming. Dietary shifts revealed that DF maintained a higher FER and lower variability when fed non-preferred feeds, while commercial formulated feed improved FER in the low-efficiency groups (DD: from 0.25 to 0.50 and DF: from 0.31 to 0.60). A correlation analysis of the changes in dietary structure revealed that the FER of the abalone was moderately stable across different developmental stages (DD: <i>r</i> = 0.63 and DF: <i>r</i> = 0.69), whereas the RFI was less consistent. These findings not only demonstrate the significant heterosis of DF in FE traits but also confirm the reliability of the FER as a key indicator of efficiency in abalone breeding programs. The results provide important practical guidance for optimizing FE under varying environmental conditions and physiological states, offering valuable insights for aquaculture breeding practices.</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

Comparative analysis of feed efficiency in Pacific abalone and its hybrid under varied environmental conditions

  • 期刊论文

  • 发表日期：

    2025年10月29日

查看全文
  • Wenchao Yu,
  • Ziheng Yin,
  • Yuehan Yan,
  • Lin Cong,
  • Miaoqin Huang,
  • Xuan Luo,
  • Caihuan Ke,
  • Weiwei You

摘要

Feed efficiency (FE) is a crucial determinant of economic viability in aquaculture, with feed costs constituting 30–70% of production expenses. This study investigated the effects of temperature, diet, and age on the FE traits of the Pacific abalone (Haliotis discus hannai, DD) and its hybrid (H. discus hannai ♀ × H. fulgens ♂, DF) using individual-level measurements. The results from three individual feeding experiments demonstrated that the feed efficiency ratio (FER) of the abalone exhibited greater stability and lower environmental sensitivity than the residual feed intake (RFI). DF outperformed DD in FER across all temperatures, particularly at 27 °C (DD: 0.28 and DF: 0.54), highlighting its suitability for high-temperature farming. Dietary shifts revealed that DF maintained a higher FER and lower variability when fed non-preferred feeds, while commercial formulated feed improved FER in the low-efficiency groups (DD: from 0.25 to 0.50 and DF: from 0.31 to 0.60). A correlation analysis of the changes in dietary structure revealed that the FER of the abalone was moderately stable across different developmental stages (DD: r = 0.63 and DF: r = 0.69), whereas the RFI was less consistent. These findings not only demonstrate the significant heterosis of DF in FE traits but also confirm the reliability of the FER as a key indicator of efficiency in abalone breeding programs. The results provide important practical guidance for optimizing FE under varying environmental conditions and physiological states, offering valuable insights for aquaculture breeding practices.