Lemos Carlos Henrique da Paixão, Santos Aline Dos Anjos, de Oliveira Crislaine Palmeira Barbosa, Silva Isabelle Santos, Couto Ricardo David, Braga Luís Gustavo Tavares, Vidal Luiz Vitor Oliveira, Copatti Carlos Eduardo
Programa de Pós-Graduação em Zootecnia, Universidade Federal da Bahia, Av. Adhemar de Barros, s/n, Ondina, Salvador, 40170-110, BA, Brazil.
Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal da Bahia, Rua Barão Geremoabo S/N, Ondina, Salvador, BA, 40170-115, Brazil.
Biol Trace Elem Res. 2025 Jan 7. doi: 10.1007/s12011-025-04516-1.
The study aimed to examine the interaction between diets supplemented with zinc-L-selenomethionine (ZnSeMet) and two stocking densities (SD) on Nile tilapia (Oreochromis niloticus) males. Four extruded diets were formulated: 0.0, 0.5, 1.0, and 2.0 mg ZnSeMet kg. Fish (58.00 g) were reared at a low SD (LSD) (15 fish tank or 4,35 kg m) and a high SD (HSD) (45 fish tank or 13,05 kg m). They were randomly distributed in eight treatments in triplicate in a recirculatory aquaculture system (200 L) and were fed until apparent satiation thrice daily for 65 days. The interaction between LSD and 1.0 or 2.0 mg ZnSeMet kg was better than other treatments for final weight (116.50-174.83 vs. 97.33-139.17 g), weight gain (108.83.50-116.83 vs. 39.00-80.83 g), relative weight gain (188.03-201.18 vs. 66.25-139.40%), total final length (20.12-20.63 vs. 17.33-19.00 cm), specific growth rate (1.76-1.83 vs. 0.85-1.45% day) (p < 0.05). In general, the interaction between LSD and 1.0 mg ZnSeMet kg compared to several treatments, showed an increase in plasma total protein (3.23 vs. 2.67-2.78 g dL) and total cholesterol (93.67 vs. 68.50-76.67 mg dL) levels and a reduction in aspartate aminotransferase activity (14.83 vs. 145.67-155.17 U L) (p < 0.05). The highest values for albumin (0.83 vs. 0.57 g dL), glucose (56.00 vs. 45.09 mg dL), and triglycerides (122.33 vs. 68.87 mg dL) in the plasma, erythrocytes (2.22 vs. 2.13 × 10 µL), hemoglobin (9.82 vs. 9.26 g dL), and hematocrit (33.09 vs. 30.21%) were observed in LSD than HSD-reared fish (p < 0.05). In conclusion, adding 1.0 mg ZnSeMet kg at LSD improved fish growth and hemato-biochemical parameters, but it was not effective at HSD.
本研究旨在探讨添加L-硒代蛋氨酸锌（ZnSeMet）的日粮与两种放养密度（SD）对尼罗罗非鱼（Oreochromis niloticus）雄鱼的相互作用。配制了四种挤压日粮：0.0、0.5、1.0和2.0毫克ZnSeMet/千克。鱼（58.00克）分别在低密度放养（LSD）（15尾/鱼缸或4.35千克/立方米）和高密度放养（HSD）（45尾/鱼缸或13.05千克/立方米）条件下饲养。它们被随机分配到八个处理组，每个处理组设三个重复，置于循环水养殖系统（200升）中，每天投喂三次，直至明显饱食，持续65天。与其他处理相比，LSD与1.0或2.0毫克ZnSeMet/千克的相互作用在终末体重（116.50 - 174.83克对97.33 - 139.17克）、体重增加（108.83 - 116.83克对39.00 - 80.83克）、相对体重增加（188.03 - 201.18%对66.
