Effect of ractopamine on Nile tilapia in the end of grow-out period
| Autor: | Aldo Tovo Neto, Alis Correia Bittarello, Rogério Paulo Tovo, Lilian Dena dos Santos, Robie Allan Bombardelli, Fábio Meurer |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
feed additive Feed additive beta-adrenergic fish nutrition 0402 animal and dairy science 04 agricultural and veterinary sciences Biology biology.organism_classification 040201 dairy & animal science 01 natural sciences Ractopamine Nile tilapia Oreochromis chemistry.chemical_compound growth promoters Animal science chemistry 010608 biotechnology Fish Animal Science and Zoology lcsh:Animal culture Completely randomized design lcsh:SF1-1100 |
| Zdroj: | Revista Brasileira de Zootecnia, Volume: 46, Issue: 5, Pages: 367-373, Published: MAY 2017 Revista Brasileira de Zootecnia v.46 n.5 2017 Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ Revista Brasileira de Zootecnia, Vol 46, Iss 5, Pp 367-373 |
| Popis: | This experiment was conducted in outdoor tanks to evaluate the effect of inclusion of ractopamine at increasing levels (0, 4, 8, 12, and 16 mg kg−1) as additive in Nile tilapia (Oreochromis niloticus) diet in the final grow-out period (750-920 g) during 31 days. Therefore, 400 fish were housed into 20 experimental tanks, in a completely randomized design with five treatments and four replications. Growth performance, body yield, and chemical composition of fish muscle and organs were evaluated. Fish fed diets containing up to 16 mg kg−1 of ractopamine for 31 days did not improve growth or performance parameters. However, lipid percentage of abdominal muscle was different in fish fed ractopamine, reaching the lowest level of 199.3 g kg−1 of ether extract at 8 mg kg−1 treatment. Other body chemical composition parameters did not differ between animals treated or not treated. Feeding ractopamine up to 31 days has limited effect on body composition in Nile tilapia (~900 g), without any changes in growth parameters. This is a lower metabolic response in this species when compared with mammals and other terrestrial animals. |
| Databáze: | OpenAIRE |
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