Seasonal changes in water temperature affect the utilization of dietary fatty acids in Atlantic salmon (Salmo salar L.). Furthermore, fatty acid profiles of terrestrial oils dictate their suitability in terms of provision of metabolic energy and final product quality. An on‐farm, growth trial of Atlantic salmon was conducted in Tasmania, Australia over the final year of grow‐out (323 days), consisting of a ‘summer phase’ and a ‘winter phase’. Poultry by‐product oil, canola oil and tallow were fed at high dietary lipid inclusion level (80%) to assess growth, fillet fatty acid composition and sensorial attributes. In the summer phase, the tallow diet appeared to provide added substrate for metabolic energy, potentially enhancing the deposition of n‐3 LC PUFA into the fillet, despite lower final weight and a reduced apparent lipid digestibility. Subsequent winter phase results suggested all diets adequately provided metabolic energy and fillet n‐3 LC PUFA concentrations were comparable. Additionally, this study highlights the importance of a well‐considered experimental design and subsequent statistical interpretation, for commercial scale, on‐farm feeding trials. Ultimately, this study demonstrates the importance of seasonally tailored diets for Atlantic salmon, using high terrestrial oil inclusion, under challenging Australian farming conditions.

中文翻译：

---

通过长期的农场生长试验评估，大西洋鲑饲喂含陆油的饲料对生长和产品质量的季节性影响

水温的季节性变化影响大西洋鲑鱼（Salmo salar L）。此外，在提供代谢能和最终产品质量方面，陆地油的脂肪酸谱决定了它们的适用性。在养殖的最后一年（323天）中，在澳大利亚塔斯马尼亚州进行了大西洋鲑鱼的农场生长试验，该试验由“夏季期”和“冬季期”组成。家禽副产品油，低芥酸菜子油和牛脂以高饮食脂质含量（80％）进食，以评估生长，鱼片脂肪酸组成和感官特性。在夏季阶段，牛脂饮食似乎为代谢能量提供了额外的底物，尽管最终重量降低且表观脂质消化率降低，但可能会增强n-3 LC PUFA在鱼片中的沉积。随后的冬季阶段结果表明，所有饮食都可以提供足够的代谢能，并且鱼片n-3 LC PUFA的浓度是可比的。此外，本研究强调了对于商业规模，农场饲养试验而言，经过深思熟虑的实验设计和随后的统计解释的重要性。最终，这项研究证明了在苛刻的澳大利亚养殖条件下，采用高陆生油含量的大西洋鲑季节性节食的重要性。