Bøgwald Isak, Pedersen Alice Marie, Dias Jorge, Wubshet Sileshi Gizachew, Eilertsen Karl-Erik
The Norwegian College of Fishery Science, UIT - The Arctic University of Norway, Tromsø, Norway.
Calanus AS, Tromsø, Norway.
Aquac Nutr. 2025 Aug 6;2025:5531437. doi: 10.1155/anu/5531437. eCollection 2025.
The aquaculture industry is in dire need of novel feed ingredients that can improve the health and welfare of farmed fish and shrimp. Zooplankton are natural and underutilized marine resources with the potential to be part of a nutritional solution. The aim of this study was to determine the health effects for European sea bass juveniles fed diets with a protein hydrolysate from the zooplankton species , a novel raw material for feed ingredients. Calanus hydrolysate (CH) was benchmarked using fish hydrolysates as controls at inclusion rates of 3%-4%, depending on the protein content for each of the hydrolysates to allow equivalent protein levels in the diets. The initial feeding trial was 84 days, with an additional week to perform an inflammatory challenge with a UV-inactivated bacterium. Fish receiving diets with CH inclusion were associated with lower levels of hepatic protein carbonyls, a lower level of calprotectin and higher levels of mucins compared to the control hydrolysate diets. No statistically significant differences among the diets for the biomarkers related to the inflammatory challenge were observed. The study showed that dietary inclusion of CH has the potential to reduce oxidative stress and increase intestinal health, thus, improving the health of European sea bass juveniles. These health-promoting effects, combined with the sustainable origin of highlight the potential of CH as a novel functional ingredient for future aquaculture feeds. Its use could contribute to reduced reliance on traditional fishmeal sources, thereby, supporting more sustainable and resilient aquaculture practices.
水产养殖业迫切需要能够改善养殖鱼类和虾类健康与福利的新型饲料成分。浮游动物是天然且未得到充分利用的海洋资源，有潜力成为营养解决方案的一部分。本研究的目的是确定以浮游动物物种的蛋白质水解物作为饲料成分的新型原料，对欧洲鲈鱼幼鱼健康的影响。根据每种水解物的蛋白质含量，以3%-4%的添加率使用鱼类水解物作为对照，对哲水蚤水解物（CH）进行基准测试，以使日粮中的蛋白质水平相当。初始饲养试验为期84天，另外还有一周时间用紫外线灭活细菌进行炎症激发试验。与对照水解物日粮相比，摄入含CH日粮的鱼肝脏蛋白质羰基水平较低，钙卫蛋白水平较低，粘蛋白水平较高。在与炎症激发试验相关的生物标志物方面，各日粮之间未观察到统计学上的显著差异。研究表明，日粮中添加CH有潜力降低氧化应激并改善肠道健康，从而提高欧洲鲈鱼幼鱼的健康水平。这些促进健康的作用，再加上其可持续来源，凸显了CH作为未来水产养殖饲料新型功能成分的潜力。其使用有助于减少对传统鱼粉来源的依赖，从而支持更可持续和有韧性的水产养殖实践。
