Dietary histidine requirement of grow-out Nile tilapia (Oreochromis niloticus), based on growth performance, muscle development, expression of muscle-growth-related genes, and blood parameters
Document title: Dietary histidine requirement of grow-out Nile tilapia (Oreochromis niloticus), based on growth performance, muscle development, expression of muscle-growth-related genes, and blood parameters
Journal: Revista Brasileira de Zootecnia
Database: PERIÓDICA
System number: 000445483
ISSN: 1516-3598
Authors: 1
2
3
2
2
4
2
1
Institutions: 1Universidade Estadual de Maringa, Maringa, Parana. Brasil
2Universidade Estadual de Ponta Grossa, Ponta Grossa, Parana. Brasil
3Universidade Estadual do Oeste do Parana, Toledo, Parana. Brasil
4Universidade Estadual de Maringa, Departamento de Ciencias Morfologicas, Maringa, Parana. Brasil
Year:
Volumen: 49
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, analítico
English abstract This research was conducted to determine optimal dietary histidine requirement of grow-out Nile tilapia, Oreochromis niloticus, based on muscle development, expression of muscle-growth-related genes, and blood parameters. Fish (n = 288, initial body weight of 64.17±0.53 g) were fed extruded diets with graded levels of histidine (4.23, 5.44, 7.17, 8.91, and 11.57 g kg−1), containing approximately 289 g kg−1 crude protein and 3565 kcal kg−1 digestible energy. The study followed a completely randomized design with five treatments and four replicates each, for 65 days. There was a quadratic effect of dietary histidine on final body weight, feed conversion, and net protein utilization, and the best values were optimized at 8.09, 7.88, and 7.33 g kg−1, respectively. Feed intake, hepatosomatic index, survival, body composition, and blood parameters of total protein, glucose, triglycerides, cholesterol, hematocrit, and hemoglobin were not affected by dietary treatments. Predominance of hypertrophic growth and higher mRNA levels of myogenin and MyoD were observed in fish fed histidine from 5.44 to 11.57 g kg−1 compared with fish fed histidine at 4.23 g kg−1. The mRNA expression of myostatin was not affected by dietary treatments. The dietary requirement of histidine for grow-out Nile tilapia was determined at 8.09 g kg−1, considering growth performance, muscle development, and gene expression responses
Disciplines: Medicina veterinaria y zootecnia
Keyword: Pesca,
Nutrición animal,
Medicina veterinaria,
Tilapia del Nilo,
Oreochromis niloticus,
Expresión génica,
Histidina,
Morfología animal
Keyword: Fisheries,
Animal nutrition,
Veterinary medicine,
Nile tilapia,
Oreochromis niloticus,
Histidine,
Aquaculture,
Gene expression,
Animal morphology
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