The chub, Squalius cephalus (L.), is an important stocking fish in European rivers. This study investigates sustainable measures for culturing chub in earthen ponds. Two novel treatments were applied to enhance utilisation of natural pond food resources: yellow plates used as insect attractants (YIT) and plant biomass supplementation (PB) as a substrate supporting the development of natural food organisms. While no significant differences were recorded for most environmental variables, average macrozoobenthos biomass was significantly higher (p < 0.05) in the control (61.51 g.m⁻²) compared with PB (29.3 g.m⁻²) and YIT (36.8 g.m⁻²). However, fish from YIT ponds had significantly higher (p < 0.05) mean body weight gain (34.7 g) and SGR (1.60 g.day⁻¹) compared to the PB (28.65 g and 1.50 g.day⁻¹) or control (25.64g and 1.43 g.day⁻¹) ponds. Diet analysis indicated a higher amount of animal food (mainly zooplankton, zoobenthos, terrestrial insects and fish) in YIT and PB treatments, while a higher amount of plant (mainly macrophytes) and emergency food (detritus) was observed in the control ponds. Differences in diet were reflected in the fatty acid profile of fish from different treatments, with YIT fish having significantly (p < 0.05) higher n-3 PUFA, n-3 HUFA and n-3/n-6 ratio, compared to PB fish and controls. Our results confirm that YIT use in pond aquaculture significantly enhances the role of natural food resources in the diet of cultured chub, thereby contributing to its sustainable production.

鲈鱼Squalius cephalus（L.）是欧洲河流域的重要放养鱼。本研究调查了在土池中养殖鱼的可持续措施。应用了两种新颖的处理方法来提高对天然池塘食物资源的利用：用作昆虫引诱剂的黄板（YIT）和作为支持天然食物生物发展的基质的植物生物质补充剂（PB）。尽管大多数环境变量均未见显着差异，但与PB（29.3 gm ^-2）和YIT（36.8 gm ^-2）相比，对照（61.51 gm ^-2）的平均大型动物生物量显着更高（p <0.05 ）。但是，YIT池塘中的鱼的数量要高得多（p<0.05）平均体重增加（34.7 g）和SGR（1.60 g.day ^-1）与PB（28.65 g和1.50 g.day ^-1）或对照（25.64g和1.43 g.day ^-1）池塘相比。饮食分析表明，在YIT和PB处理中，动物性食物（主要是浮游动物，底栖动物，陆生昆虫和鱼类）的含量较高，而对照池塘中观察到的植物（主要是大型植物）和紧急食物（碎屑）的含量较高。饮食差异反映在不同处理方法的鱼的脂肪酸谱中，YIT鱼具有显着的（p<0.05）与PB鱼和对照组相比，n-3 PUFA，n-3 HUFA和n-3 / n-6比率更高。我们的结果证实，在池塘水产养殖中使用YIT可以显着增强天然食物资源在养殖的饮食中的作用，从而有助于其可持续生产。