Digestible Protein Requirement of Pirarucu Juveniles (Arapaima gigas) Reared in Outdoor Aquaculture
| Autor: | Marcel José Martins dos Santos, I. B. Allaman, F. O. Magalhães Júnior, I. J. Soares Junior, R. F. Silva, Luís Gustavo Tavares Braga |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
business.industry ved/biology ved/biology.organism_classification_rank.species 04 agricultural and veterinary sciences Protein requirement Biology Feed conversion ratio Biotechnology 03 medical and health sciences 030104 developmental biology Dietary protein Animal science Aquaculture 040102 fisheries medicine 0401 agriculture forestry and fisheries Juvenile Arapaima gigas Protein retention medicine.symptom business Weight gain |
| Zdroj: | Journal of Agricultural Science. 9:114 |
| ISSN: | 1916-9760 1916-9752 |
| DOI: | 10.5539/jas.v9n9p114 |
| Popis: | Pirarucu (Arapaima gigas) is a fast-growing, carnivorous species reared commercially in Amazonian countries as Brazil. Lack of a nutritionally balanced and affordable diet is a major constraint in pirarucu aquaculture, and our investigation sought to estimate the dietary protein requirement for this species. Four diets were formulated to contain increasing concentrations of digestible protein (32, 35, 38, and 41%) and fed to triplicate groups of juvenile pirarucu of around 2 kg for 18 weeks. As result, pirarucu showed no differences in feed intake, survival, or fillet yield. However, regression analysis revealed that weight gain (WG) values showed a general increasing trend with increasing dietary digestible protein (DP) level up to 36.7%. In addition, feed conversion rates were also improved with increase in dietary DP up to 36.4%. Fish fed diets containing 32 and 41% had poor feed conversion rates. Thel protein retention rate (PRR) and protein efficiency index (PER) decreased as levels of DP increased. The optimal dietary protein content for juvenile pirarucu between 1.98 and 4 kg of BW is about 36% of digestible protein on diet. |
| Databáze: | OpenAIRE |
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