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| RODRIGUES,Ana Paula Oeda; LIMA,Adriana Ferreira; ANDRADE,Caniggia Lacerda; MEDEIROS,Rafaella Machado dos Santos de. |
| ABSTRACT Pirarucu is one of the main fish species for the development of aquaculture in the Amazon. In this study, the optimal feeding frequency for juvenile pirarucu was assessed based on growth and feed efficiency. Juvenile pirarucu weighing ca. 80 g were fed once, twice, three or four times daily until apparent satiation for 63 days. Fish fed three or four times per day presented higher growth, feed intake, and fat body content than those fed once or twice per day. There was no significant difference for feed conversion ratio, and protein and energy retention rates among treatments, suggesting that increased feeding frequency did not affect feed utilization efficiency. Mean feed intake per meal was higher when fish were fed once per day, possibly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feed management; Feed utilization; Feeding practice; Osteoglossiformes. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000100011 |
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| LIMA,Adriana Ferreira; OLIVEIRA,Hyago Jovane Borges de; PEREIRA,André Silvério; SAKAMOTO,Silmara Sanae. |
| ABSTRACT We assessed the effect of stocking density on physiological parameters (blood lactate, glucose, cortisol, hematocrit), water quality (temperature, dissolved oxygen, pH, unionized ammonia, carbon dioxide), and survival during the transportation of fingerling (24.5 ± 4.7 g) and juvenile (615.8 ± 122.2 g) pirarucu (Arapaima gigas) for six hours in plastic bags. The tested densities were 65, 80, 95, 110 and 125 g L-1 for fingerlings, and 50, 80, 110, 140 and 170 g L-1 for juveniles (three replicates each). Parameters were measured prior to and immediately after transportation, and at 24 and 96 hours recovery after transportation. No mortality was observed, except for fingerlings (< 3%) at densities of 110 and 125 g L-1 during recovery. All the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arapaima gigas; Closed system; Lactate; Cortisol; Glucose. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000300223 |
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