Hefnawy Eman, Elgazzar Eman, Sabek Ahmed, El-Laithy Saeed, Ahmed Souad
Department of Hygiene and Veterinary Management, Faculty of Veterinary Medicine, Benha University, Moshtohour 13736, Benha City, 13518, Egypt.
BMC Vet Res. 2024 Aug 7;20(1):350. doi: 10.1186/s12917-024-04200-x.
The current study was conducted to assess the impact of different LED light colors on welfare indicators in Muscovy ducks. These welfare parameters encompassed growth performance, specific behaviors, tonic immobility (TI), feather score, haematological, and serum biochemical parameters. Eighty-four healthy unsexed Muscovy ducklings aged two weeks were randomly assigned to four groups (3replicates/group; each replicate contains 7 birds) based on different LED light colors. The first group was raised under white light, the second under red light, the third under blue light, and the fourth under yellow light. To assess the impact of various LED light colors on welfare, growth performance indicators (body weight, body weight gain, feed intake, and feed conversion ratio) were measured. Behavioral patterns including feeding, drinking, standing, walking, sitting, feather pecking, and other activities were recorded. Tonic immobility test (TI) and feather condition scoring were conducted at 3, 6, and 10 weeks of age. At the end of the study blood samples were collected for hematological and serum biochemical analyses.
The results revealed that using blue, yellow, and red colors had no adverse effect on the final body weight of the ducks (P > 0.05). Unlike to red light, blue light significantly reduced feather pecking, TI time and cortisol concentrations and improved the feather condition score (P ≤ 0.05).
The current findings suggest that the application of blue light effectively improves welfare indices and has no detrimental impact on the growth performance of Muscovy ducks thereby positively contributing to their welfare.
本研究旨在评估不同颜色的LED光对番鸭福利指标的影响。这些福利参数包括生长性能、特定行为、强直静止（TI）、羽毛评分、血液学和血清生化参数。84只两周龄的健康未分性别的番鸭雏鸭根据不同的LED光颜色随机分为四组（每组3个重复；每个重复包含7只鸭）。第一组在白光下饲养，第二组在红光下饲养，第三组在蓝光下饲养，第四组在黄光下饲养。为了评估不同颜色的LED光对福利的影响，测量了生长性能指标（体重、体重增加、采食量和饲料转化率）。记录了包括采食、饮水、站立、行走、坐卧、啄羽和其他活动在内的行为模式。在3、6和10周龄时进行了强直静止试验（TI）和羽毛状况评分。在研究结束时采集血液样本进行血液学和血清生化分析。
结果表明，使用蓝色、黄色和红色光对鸭的最终体重没有不利影响（P>0.05）。与红光不同，蓝光显著减少了啄羽行为、TI时间和皮质醇浓度，并提高了羽毛状况评分（P≤0.05）。
目前的研究结果表明，蓝光的应用有效地改善了福利指标，对番鸭的生长性能没有不利影响，从而对它们的福利有积极贡献。
