Feeding regime, which involve selection of appropriate diet and application of feed itself is a decisive factor in intensive, RAS-based production system – more so, for carnivorous fish culture. It is critical for the economics, resource (feed/nutrients) use efficiency and final profit yield. The present study examined different feeding strategies in juvenile pikeperch reared in RAS for growth performance, survivability, feed utilization, and fish welfare. Juvenile pikeperch (106.59 ± 24.84 g) were cultured in RAS for 112 days and fed at five different feeding intervals (2-h, 4-h, 6-h, 8-h and 12-h) using automatic feeder Imetronic® (Pessac, France). Fishes were fed a commercially standardized pikeperch diet. A higher degree of growth heterogeneity was observed in groups fed in shorter feeding intervals (2-h, 4-h and 6-h). At the end of the experiment, slightly higher fin damage was observed in all tested groups compared to fin conditions of stocked fish especially for dorsal and caudal fins. No significant differences were observed in selected biochemical parameters indicating liver, pancreas, and intestinal function. All tested fish were adequately fed providing sufficient nutrients for proper pikeperch growth and welfare. Nevertheless, the feeding interval 8-hour was evaluated as optimal. This frequency supports higher fish conditions (Fulton's coefficient) and the specific growth rate (SGR), survival rate (SR), weight heterogeneity (CV₂), lower fin erosion compared to the other tested frequency and optimal level of biochemical parameters in blood plasma.

饲喂制度，包括选择适当的饮食和饲料本身的应用，是集约化、基于 RAS 的生产系统的决定性因素——对于肉食性鱼类养殖更是如此。它对经济、资源（饲料/养分）利用效率和最终收益至关重要。本研究检查了在 RAS 中饲养的梭鲈幼鱼的不同喂养策略，以提高其生长性能、生存能力、饲料利用率和鱼类福利。将幼鱼 (106.59 ± 24.84 g) 在 RAS 中培养 112 天，并使用自动喂食器 Imetronic® (Pessac) 以五个不同的喂食间隔（2-h、4-h、6-h、8-h 和 12-h）喂食， 法国）。鱼被喂食商业标准化的梭鲈饮食。在较短的喂养间隔（2-h、4-h 和 6-h）喂养的组中观察到更高程度的生长异质性。在实验结束时，与放养鱼的鳍状况相比，在所有测试组中观察到的鳍损伤略高，尤其是背鳍和尾鳍。在选择的指示肝脏、胰腺和肠功能的生化参数中没有观察到显着差异。所有测试的鱼都被充分喂食，为梭鲈的正常生长和福利提供足够的营养。然而，8 小时的喂食间隔被评估为最佳。此频率支持更高的鱼类条件（富尔顿系数）和特定生长率 (SGR)、存活率 (SR)、体重异质性 (CV 在选择的指示肝脏、胰腺和肠功能的生化参数中没有观察到显着差异。所有测试的鱼都被充分喂食，为梭鲈的正常生长和福利提供足够的营养。然而，8 小时的喂食间隔被评估为最佳。此频率支持更高的鱼类条件（富尔顿系数）和特定生长率 (SGR)、存活率 (SR)、体重异质性 (CV 在选择的指示肝脏、胰腺和肠功能的生化参数中没有观察到显着差异。所有测试的鱼都被充分喂食，为梭鲈的正常生长和福利提供足够的营养。然而，8 小时的喂食间隔被评估为最佳。此频率支持更高的鱼类条件（富尔顿系数）和特定生长率 (SGR)、存活率 (SR)、体重异质性 (CV₂ )，与其他测试频率和血浆中生化参数的最佳水平相比，鳍侵蚀更低。